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ruby--ruby/io.c
normal 3b174fb7d6 io.c: IO#pwrite uses tmp buffer to avoid parallel modification 
Since we release GVL, we must freeze and duplicate the string buffer
to prevent other threads from modifying our buffer while we are
waiting on pwrite(2).

* io.c (rb_io_pwrite): use_rb_str_tmp_frozen_{acquire/release}
  [Bug #14195]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61376 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-12-21 00:26:24 +00:00

13215 lines
334 KiB
C
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/**********************************************************************
io.c -
$Author$
created at: Fri Oct 15 18:08:59 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "internal.h"
#include "ruby/io.h"
#include "ruby/thread.h"
#include "dln.h"
#include "encindex.h"
#include "id.h"
#include <ctype.h>
#include <errno.h>
#include "ruby_atomic.h"
#undef free
#define free(x) xfree(x)
#if defined(DOSISH) || defined(__CYGWIN__)
#include <io.h>
#endif
#include <sys/types.h>
#if defined HAVE_NET_SOCKET_H
# include <net/socket.h>
#elif defined HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#if defined(__BOW__) || defined(__CYGWIN__) || defined(_WIN32)
# define NO_SAFE_RENAME
#endif
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__sun) || defined(_nec_ews)
# define USE_SETVBUF
#endif
#ifdef __QNXNTO__
#include "unix.h"
#endif
#include <sys/types.h>
#if defined(HAVE_SYS_IOCTL_H) && !defined(_WIN32)
#include <sys/ioctl.h>
#endif
#if defined(HAVE_FCNTL_H) || defined(_WIN32)
#include <fcntl.h>
#elif defined(HAVE_SYS_FCNTL_H)
#include <sys/fcntl.h>
#endif
#if !HAVE_OFF_T && !defined(off_t)
# define off_t long
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#include <sys/stat.h>
#if defined(HAVE_SYS_PARAM_H) || defined(__HIUX_MPP__)
# include <sys/param.h>
#endif
#if !defined NOFILE
# define NOFILE 64
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYSCALL_H
#include <syscall.h>
#elif defined HAVE_SYS_SYSCALL_H
#include <sys/syscall.h>
#endif
#ifdef HAVE_SYS_UIO_H
#include <sys/uio.h>
#endif
#ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h> /* for WNOHANG on BSD */
#endif
#include "ruby/util.h"
#ifndef O_ACCMODE
#define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
#endif
#if SIZEOF_OFF_T > SIZEOF_LONG && !defined(HAVE_LONG_LONG)
# error off_t is bigger than long, but you have no long long...
#endif
#ifndef PIPE_BUF
# ifdef _POSIX_PIPE_BUF
# define PIPE_BUF _POSIX_PIPE_BUF
# else
# define PIPE_BUF 512 /* is this ok? */
# endif
#endif
#ifndef EWOULDBLOCK
# define EWOULDBLOCK EAGAIN
#endif
#if defined(HAVE___SYSCALL) && (defined(__APPLE__) || defined(__OpenBSD__))
/* Mac OS X and OpenBSD have __syscall but don't define it in headers */
off_t __syscall(quad_t number, ...);
#endif
#define IO_RBUF_CAPA_MIN 8192
#define IO_CBUF_CAPA_MIN (128*1024)
#define IO_RBUF_CAPA_FOR(fptr) (NEED_READCONV(fptr) ? IO_CBUF_CAPA_MIN : IO_RBUF_CAPA_MIN)
#define IO_WBUF_CAPA_MIN 8192
/* define system APIs */
#ifdef _WIN32
#undef open
#define open rb_w32_uopen
#undef rename
#define rename(f, t) rb_w32_urename((f), (t))
#endif
VALUE rb_cIO;
VALUE rb_eEOFError;
VALUE rb_eIOError;
VALUE rb_mWaitReadable;
VALUE rb_mWaitWritable;
static VALUE rb_eEAGAINWaitReadable;
static VALUE rb_eEAGAINWaitWritable;
static VALUE rb_eEWOULDBLOCKWaitReadable;
static VALUE rb_eEWOULDBLOCKWaitWritable;
static VALUE rb_eEINPROGRESSWaitWritable;
static VALUE rb_eEINPROGRESSWaitReadable;
VALUE rb_stdin, rb_stdout, rb_stderr;
static VALUE orig_stdout, orig_stderr;
VALUE rb_output_fs;
VALUE rb_rs;
VALUE rb_output_rs;
VALUE rb_default_rs;
static VALUE argf;
#define id_exception idException
static ID id_write, id_read, id_getc, id_flush, id_readpartial, id_set_encoding;
static VALUE sym_mode, sym_perm, sym_flags, sym_extenc, sym_intenc, sym_encoding, sym_open_args;
static VALUE sym_textmode, sym_binmode, sym_autoclose;
static VALUE sym_SET, sym_CUR, sym_END;
static VALUE sym_wait_readable, sym_wait_writable;
#ifdef SEEK_DATA
static VALUE sym_DATA;
#endif
#ifdef SEEK_HOLE
static VALUE sym_HOLE;
#endif
struct argf {
VALUE filename, current_file;
long last_lineno; /* $. */
long lineno;
VALUE argv;
VALUE inplace;
struct rb_io_enc_t encs;
int8_t init_p, next_p, binmode;
};
static rb_atomic_t max_file_descriptor = NOFILE;
void
rb_update_max_fd(int fd)
{
struct stat buf;
rb_atomic_t afd = (rb_atomic_t)fd;
rb_atomic_t max_fd = max_file_descriptor;
if (afd <= max_fd)
return;
if (fstat(fd, &buf) != 0 && errno == EBADF) {
rb_bug("rb_update_max_fd: invalid fd (%d) given.", fd);
}
while (max_fd < afd) {
max_fd = ATOMIC_CAS(max_file_descriptor, max_fd, afd);
}
}
void
rb_maygvl_fd_fix_cloexec(int fd)
{
/* MinGW don't have F_GETFD and FD_CLOEXEC. [ruby-core:40281] */
#if defined(HAVE_FCNTL) && defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)
int flags, flags2, ret;
flags = fcntl(fd, F_GETFD); /* should not fail except EBADF. */
if (flags == -1) {
rb_bug("rb_maygvl_fd_fix_cloexec: fcntl(%d, F_GETFD) failed: %s", fd, strerror(errno));
}
if (fd <= 2)
flags2 = flags & ~FD_CLOEXEC; /* Clear CLOEXEC for standard file descriptors: 0, 1, 2. */
else
flags2 = flags | FD_CLOEXEC; /* Set CLOEXEC for non-standard file descriptors: 3, 4, 5, ... */
if (flags != flags2) {
ret = fcntl(fd, F_SETFD, flags2);
if (ret == -1) {
rb_bug("rb_maygvl_fd_fix_cloexec: fcntl(%d, F_SETFD, %d) failed: %s", fd, flags2, strerror(errno));
}
}
#endif
}
void
rb_fd_fix_cloexec(int fd)
{
rb_maygvl_fd_fix_cloexec(fd);
rb_update_max_fd(fd);
}
/* this is only called once */
static int
rb_fix_detect_o_cloexec(int fd)
{
#if defined(O_CLOEXEC) && defined(F_GETFD)
int flags = fcntl(fd, F_GETFD);
if (flags == -1)
rb_bug("rb_fix_detect_o_cloexec: fcntl(%d, F_GETFD) failed: %s", fd, strerror(errno));
if (flags & FD_CLOEXEC)
return 1;
#endif /* fall through if O_CLOEXEC does not work: */
rb_maygvl_fd_fix_cloexec(fd);
return 0;
}
int
rb_cloexec_open(const char *pathname, int flags, mode_t mode)
{
int ret;
static int o_cloexec_state = -1; /* <0: unknown, 0: ignored, >0: working */
#ifdef O_CLOEXEC
/* O_CLOEXEC is available since Linux 2.6.23. Linux 2.6.18 silently ignore it. */
flags |= O_CLOEXEC;
#elif defined O_NOINHERIT
flags |= O_NOINHERIT;
#endif
ret = open(pathname, flags, mode);
if (ret == -1) return -1;
if (ret <= 2 || o_cloexec_state == 0) {
rb_maygvl_fd_fix_cloexec(ret);
}
else if (o_cloexec_state > 0) {
return ret;
}
else {
o_cloexec_state = rb_fix_detect_o_cloexec(ret);
}
return ret;
}
int
rb_cloexec_dup(int oldfd)
{
/* Don't allocate standard file descriptors: 0, 1, 2 */
return rb_cloexec_fcntl_dupfd(oldfd, 3);
}
int
rb_cloexec_dup2(int oldfd, int newfd)
{
int ret;
/* When oldfd == newfd, dup2 succeeds but dup3 fails with EINVAL.
* rb_cloexec_dup2 succeeds as dup2. */
if (oldfd == newfd) {
ret = newfd;
}
else {
#if defined(HAVE_DUP3) && defined(O_CLOEXEC)
static int try_dup3 = 1;
if (2 < newfd && try_dup3) {
ret = dup3(oldfd, newfd, O_CLOEXEC);
if (ret != -1)
return ret;
/* dup3 is available since Linux 2.6.27, glibc 2.9. */
if (errno == ENOSYS) {
try_dup3 = 0;
ret = dup2(oldfd, newfd);
}
}
else {
ret = dup2(oldfd, newfd);
}
#else
ret = dup2(oldfd, newfd);
#endif
if (ret == -1) return -1;
}
rb_maygvl_fd_fix_cloexec(ret);
return ret;
}
int
rb_cloexec_pipe(int fildes[2])
{
int ret;
#if defined(HAVE_PIPE2)
static int try_pipe2 = 1;
if (try_pipe2) {
ret = pipe2(fildes, O_CLOEXEC);
if (ret != -1)
return ret;
/* pipe2 is available since Linux 2.6.27, glibc 2.9. */
if (errno == ENOSYS) {
try_pipe2 = 0;
ret = pipe(fildes);
}
}
else {
ret = pipe(fildes);
}
#else
ret = pipe(fildes);
#endif
if (ret == -1) return -1;
#ifdef __CYGWIN__
if (ret == 0 && fildes[1] == -1) {
close(fildes[0]);
fildes[0] = -1;
errno = ENFILE;
return -1;
}
#endif
rb_maygvl_fd_fix_cloexec(fildes[0]);
rb_maygvl_fd_fix_cloexec(fildes[1]);
return ret;
}
int
rb_cloexec_fcntl_dupfd(int fd, int minfd)
{
int ret;
#if defined(HAVE_FCNTL) && defined(F_DUPFD_CLOEXEC) && defined(F_DUPFD)
static int try_dupfd_cloexec = 1;
if (try_dupfd_cloexec) {
ret = fcntl(fd, F_DUPFD_CLOEXEC, minfd);
if (ret != -1) {
if (ret <= 2)
rb_maygvl_fd_fix_cloexec(ret);
return ret;
}
/* F_DUPFD_CLOEXEC is available since Linux 2.6.24. Linux 2.6.18 fails with EINVAL */
if (errno == EINVAL) {
ret = fcntl(fd, F_DUPFD, minfd);
if (ret != -1) {
try_dupfd_cloexec = 0;
}
}
}
else {
ret = fcntl(fd, F_DUPFD, minfd);
}
#elif defined(HAVE_FCNTL) && defined(F_DUPFD)
ret = fcntl(fd, F_DUPFD, minfd);
#elif defined(HAVE_DUP)
ret = dup(fd);
if (ret != -1 && ret < minfd) {
const int prev_fd = ret;
ret = rb_cloexec_fcntl_dupfd(fd, minfd);
close(prev_fd);
}
return ret;
#else
# error "dup() or fcntl(F_DUPFD) must be supported."
#endif
if (ret == -1) return -1;
rb_maygvl_fd_fix_cloexec(ret);
return ret;
}
#define argf_of(obj) (*(struct argf *)DATA_PTR(obj))
#define ARGF argf_of(argf)
#define GetWriteIO(io) rb_io_get_write_io(io)
#define READ_DATA_PENDING(fptr) ((fptr)->rbuf.len)
#define READ_DATA_PENDING_COUNT(fptr) ((fptr)->rbuf.len)
#define READ_DATA_PENDING_PTR(fptr) ((fptr)->rbuf.ptr+(fptr)->rbuf.off)
#define READ_DATA_BUFFERED(fptr) READ_DATA_PENDING(fptr)
#define READ_CHAR_PENDING(fptr) ((fptr)->cbuf.len)
#define READ_CHAR_PENDING_COUNT(fptr) ((fptr)->cbuf.len)
#define READ_CHAR_PENDING_PTR(fptr) ((fptr)->cbuf.ptr+(fptr)->cbuf.off)
#if defined(_WIN32)
#define WAIT_FD_IN_WIN32(fptr) \
(rb_w32_io_cancelable_p((fptr)->fd) ? 0 : rb_thread_wait_fd((fptr)->fd))
#else
#define WAIT_FD_IN_WIN32(fptr)
#endif
#define READ_CHECK(fptr) do {\
if (!READ_DATA_PENDING(fptr)) {\
WAIT_FD_IN_WIN32(fptr);\
rb_io_check_closed(fptr);\
}\
} while(0)
#ifndef S_ISSOCK
# ifdef _S_ISSOCK
# define S_ISSOCK(m) _S_ISSOCK(m)
# else
# ifdef _S_IFSOCK
# define S_ISSOCK(m) (((m) & S_IFMT) == _S_IFSOCK)
# else
# ifdef S_IFSOCK
# define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
# endif
# endif
# endif
#endif
static int io_fflush(rb_io_t *);
static rb_io_t *flush_before_seek(rb_io_t *fptr);
#define NEED_NEWLINE_DECORATOR_ON_READ(fptr) ((fptr)->mode & FMODE_TEXTMODE)
#define NEED_NEWLINE_DECORATOR_ON_WRITE(fptr) ((fptr)->mode & FMODE_TEXTMODE)
#if defined(RUBY_TEST_CRLF_ENVIRONMENT) || defined(_WIN32)
/* Windows */
# define DEFAULT_TEXTMODE FMODE_TEXTMODE
# define TEXTMODE_NEWLINE_DECORATOR_ON_WRITE ECONV_CRLF_NEWLINE_DECORATOR
/*
* CRLF newline is set as default newline decorator.
* If only CRLF newline conversion is needed, we use binary IO process
* with OS's text mode for IO performance improvement.
* If encoding conversion is needed or a user sets text mode, we use encoding
* conversion IO process and universal newline decorator by default.
*/
#define NEED_READCONV(fptr) ((fptr)->encs.enc2 != NULL || (fptr)->encs.ecflags & ~ECONV_CRLF_NEWLINE_DECORATOR)
#define NEED_WRITECONV(fptr) (((fptr)->encs.enc != NULL && (fptr)->encs.enc != rb_ascii8bit_encoding()) || ((fptr)->encs.ecflags & ((ECONV_DECORATOR_MASK & ~ECONV_CRLF_NEWLINE_DECORATOR)|ECONV_STATEFUL_DECORATOR_MASK)))
#define SET_BINARY_MODE(fptr) setmode((fptr)->fd, O_BINARY)
#define NEED_NEWLINE_DECORATOR_ON_READ_CHECK(fptr) do {\
if (NEED_NEWLINE_DECORATOR_ON_READ(fptr)) {\
if (((fptr)->mode & FMODE_READABLE) &&\
!((fptr)->encs.ecflags & ECONV_NEWLINE_DECORATOR_MASK)) {\
setmode((fptr)->fd, O_BINARY);\
}\
else {\
setmode((fptr)->fd, O_TEXT);\
}\
}\
} while(0)
#define SET_UNIVERSAL_NEWLINE_DECORATOR_IF_ENC2(enc2, ecflags) do {\
if ((enc2) && ((ecflags) & ECONV_DEFAULT_NEWLINE_DECORATOR)) {\
(ecflags) |= ECONV_UNIVERSAL_NEWLINE_DECORATOR;\
}\
} while(0)
/*
* IO unread with taking care of removed '\r' in text mode.
*/
static void
io_unread(rb_io_t *fptr)
{
off_t r, pos;
ssize_t read_size;
long i;
long newlines = 0;
long extra_max;
char *p;
char *buf;
rb_io_check_closed(fptr);
if (fptr->rbuf.len == 0 || fptr->mode & FMODE_DUPLEX) {
return;
}
errno = 0;
if (!rb_w32_fd_is_text(fptr->fd)) {
r = lseek(fptr->fd, -fptr->rbuf.len, SEEK_CUR);
if (r < 0 && errno) {
if (errno == ESPIPE)
fptr->mode |= FMODE_DUPLEX;
return;
}
fptr->rbuf.off = 0;
fptr->rbuf.len = 0;
return;
}
pos = lseek(fptr->fd, 0, SEEK_CUR);
if (pos < 0 && errno) {
if (errno == ESPIPE)
fptr->mode |= FMODE_DUPLEX;
return;
}
/* add extra offset for removed '\r' in rbuf */
extra_max = (long)(pos - fptr->rbuf.len);
p = fptr->rbuf.ptr + fptr->rbuf.off;
/* if the end of rbuf is '\r', rbuf doesn't have '\r' within rbuf.len */
if (*(fptr->rbuf.ptr + fptr->rbuf.capa - 1) == '\r') {
newlines++;
}
for (i = 0; i < fptr->rbuf.len; i++) {
if (*p == '\n') newlines++;
if (extra_max == newlines) break;
p++;
}
buf = ALLOC_N(char, fptr->rbuf.len + newlines);
while (newlines >= 0) {
r = lseek(fptr->fd, pos - fptr->rbuf.len - newlines, SEEK_SET);
if (newlines == 0) break;
if (r < 0) {
newlines--;
continue;
}
read_size = _read(fptr->fd, buf, fptr->rbuf.len + newlines);
if (read_size < 0) {
int e = errno;
free(buf);
rb_syserr_fail_path(e, fptr->pathv);
}
if (read_size == fptr->rbuf.len) {
lseek(fptr->fd, r, SEEK_SET);
break;
}
else {
newlines--;
}
}
free(buf);
fptr->rbuf.off = 0;
fptr->rbuf.len = 0;
return;
}
/*
* We use io_seek to back cursor position when changing mode from text to binary,
* but stdin and pipe cannot seek back. Stdin and pipe read should use encoding
* conversion for working properly with mode change.
*
* Return previous translation mode.
*/
static inline int
set_binary_mode_with_seek_cur(rb_io_t *fptr)
{
if (!rb_w32_fd_is_text(fptr->fd)) return O_BINARY;
if (fptr->rbuf.len == 0 || fptr->mode & FMODE_DUPLEX) {
return setmode(fptr->fd, O_BINARY);
}
flush_before_seek(fptr);
return setmode(fptr->fd, O_BINARY);
}
#define SET_BINARY_MODE_WITH_SEEK_CUR(fptr) set_binary_mode_with_seek_cur(fptr)
#else
/* Unix */
# define DEFAULT_TEXTMODE 0
#define NEED_READCONV(fptr) ((fptr)->encs.enc2 != NULL || NEED_NEWLINE_DECORATOR_ON_READ(fptr))
#define NEED_WRITECONV(fptr) (((fptr)->encs.enc != NULL && (fptr)->encs.enc != rb_ascii8bit_encoding()) || NEED_NEWLINE_DECORATOR_ON_WRITE(fptr) || ((fptr)->encs.ecflags & (ECONV_DECORATOR_MASK|ECONV_STATEFUL_DECORATOR_MASK)))
#define SET_BINARY_MODE(fptr) (void)(fptr)
#define NEED_NEWLINE_DECORATOR_ON_READ_CHECK(fptr) (void)(fptr)
#define SET_UNIVERSAL_NEWLINE_DECORATOR_IF_ENC2(enc2, ecflags) ((void)(enc2), (void)(ecflags))
#define SET_BINARY_MODE_WITH_SEEK_CUR(fptr) (void)(fptr)
#endif
#if !defined HAVE_SHUTDOWN && !defined shutdown
#define shutdown(a,b) 0
#endif
#if defined(_WIN32)
#define is_socket(fd, path) rb_w32_is_socket(fd)
#elif !defined(S_ISSOCK)
#define is_socket(fd, path) 0
#else
static int
is_socket(int fd, VALUE path)
{
struct stat sbuf;
if (fstat(fd, &sbuf) < 0)
rb_sys_fail_path(path);
return S_ISSOCK(sbuf.st_mode);
}
#endif
static const char closed_stream[] = "closed stream";
void
rb_eof_error(void)
{
rb_raise(rb_eEOFError, "end of file reached");
}
VALUE
rb_io_taint_check(VALUE io)
{
rb_check_frozen(io);
return io;
}
void
rb_io_check_initialized(rb_io_t *fptr)
{
if (!fptr) {
rb_raise(rb_eIOError, "uninitialized stream");
}
}
void
rb_io_check_closed(rb_io_t *fptr)
{
rb_io_check_initialized(fptr);
if (fptr->fd < 0) {
rb_raise(rb_eIOError, closed_stream);
}
}
static rb_io_t *
rb_io_get_fptr(VALUE io)
{
rb_io_t *fptr = RFILE(io)->fptr;
rb_io_check_initialized(fptr);
return fptr;
}
VALUE
rb_io_get_io(VALUE io)
{
return rb_convert_type_with_id(io, T_FILE, "IO", idTo_io);
}
VALUE
rb_io_check_io(VALUE io)
{
return rb_check_convert_type_with_id(io, T_FILE, "IO", idTo_io);
}
VALUE
rb_io_get_write_io(VALUE io)
{
VALUE write_io;
write_io = rb_io_get_fptr(io)->tied_io_for_writing;
if (write_io) {
return write_io;
}
return io;
}
VALUE
rb_io_set_write_io(VALUE io, VALUE w)
{
VALUE write_io;
rb_io_t *fptr = rb_io_get_fptr(io);
if (!RTEST(w)) {
w = 0;
}
else {
GetWriteIO(w);
}
write_io = fptr->tied_io_for_writing;
fptr->tied_io_for_writing = w;
return write_io ? write_io : Qnil;
}
/*
* call-seq:
* IO.try_convert(obj) -> io or nil
*
* Try to convert <i>obj</i> into an IO, using to_io method.
* Returns converted IO or +nil+ if <i>obj</i> cannot be converted
* for any reason.
*
* IO.try_convert(STDOUT) #=> STDOUT
* IO.try_convert("STDOUT") #=> nil
*
* require 'zlib'
* f = open("/tmp/zz.gz") #=> #<File:/tmp/zz.gz>
* z = Zlib::GzipReader.open(f) #=> #<Zlib::GzipReader:0x81d8744>
* IO.try_convert(z) #=> #<File:/tmp/zz.gz>
*
*/
static VALUE
rb_io_s_try_convert(VALUE dummy, VALUE io)
{
return rb_io_check_io(io);
}
#if !(defined(RUBY_TEST_CRLF_ENVIRONMENT) || defined(_WIN32))
static void
io_unread(rb_io_t *fptr)
{
off_t r;
rb_io_check_closed(fptr);
if (fptr->rbuf.len == 0 || fptr->mode & FMODE_DUPLEX)
return;
/* xxx: target position may be negative if buffer is filled by ungetc */
errno = 0;
r = lseek(fptr->fd, -fptr->rbuf.len, SEEK_CUR);
if (r < 0 && errno) {
if (errno == ESPIPE)
fptr->mode |= FMODE_DUPLEX;
return;
}
fptr->rbuf.off = 0;
fptr->rbuf.len = 0;
return;
}
#endif
static rb_encoding *io_input_encoding(rb_io_t *fptr);
static void
io_ungetbyte(VALUE str, rb_io_t *fptr)
{
long len = RSTRING_LEN(str);
if (fptr->rbuf.ptr == NULL) {
const int min_capa = IO_RBUF_CAPA_FOR(fptr);
fptr->rbuf.off = 0;
fptr->rbuf.len = 0;
#if SIZEOF_LONG > SIZEOF_INT
if (len > INT_MAX)
rb_raise(rb_eIOError, "ungetbyte failed");
#endif
if (len > min_capa)
fptr->rbuf.capa = (int)len;
else
fptr->rbuf.capa = min_capa;
fptr->rbuf.ptr = ALLOC_N(char, fptr->rbuf.capa);
}
if (fptr->rbuf.capa < len + fptr->rbuf.len) {
rb_raise(rb_eIOError, "ungetbyte failed");
}
if (fptr->rbuf.off < len) {
MEMMOVE(fptr->rbuf.ptr+fptr->rbuf.capa-fptr->rbuf.len,
fptr->rbuf.ptr+fptr->rbuf.off,
char, fptr->rbuf.len);
fptr->rbuf.off = fptr->rbuf.capa-fptr->rbuf.len;
}
fptr->rbuf.off-=(int)len;
fptr->rbuf.len+=(int)len;
MEMMOVE(fptr->rbuf.ptr+fptr->rbuf.off, RSTRING_PTR(str), char, len);
}
static rb_io_t *
flush_before_seek(rb_io_t *fptr)
{
if (io_fflush(fptr) < 0)
rb_sys_fail(0);
io_unread(fptr);
errno = 0;
return fptr;
}
#define io_seek(fptr, ofs, whence) (errno = 0, lseek(flush_before_seek(fptr)->fd, (ofs), (whence)))
#define io_tell(fptr) lseek(flush_before_seek(fptr)->fd, 0, SEEK_CUR)
#ifndef SEEK_CUR
# define SEEK_SET 0
# define SEEK_CUR 1
# define SEEK_END 2
#endif
void
rb_io_check_char_readable(rb_io_t *fptr)
{
rb_io_check_closed(fptr);
if (!(fptr->mode & FMODE_READABLE)) {
rb_raise(rb_eIOError, "not opened for reading");
}
if (fptr->wbuf.len) {
if (io_fflush(fptr) < 0)
rb_sys_fail(0);
}
if (fptr->tied_io_for_writing) {
rb_io_t *wfptr;
GetOpenFile(fptr->tied_io_for_writing, wfptr);
if (io_fflush(wfptr) < 0)
rb_sys_fail(0);
}
}
void
rb_io_check_byte_readable(rb_io_t *fptr)
{
rb_io_check_char_readable(fptr);
if (READ_CHAR_PENDING(fptr)) {
rb_raise(rb_eIOError, "byte oriented read for character buffered IO");
}
}
void
rb_io_check_readable(rb_io_t *fptr)
{
rb_io_check_byte_readable(fptr);
}
static rb_encoding*
io_read_encoding(rb_io_t *fptr)
{
if (fptr->encs.enc) {
return fptr->encs.enc;
}
return rb_default_external_encoding();
}
static rb_encoding*
io_input_encoding(rb_io_t *fptr)
{
if (fptr->encs.enc2) {
return fptr->encs.enc2;
}
return io_read_encoding(fptr);
}
void
rb_io_check_writable(rb_io_t *fptr)
{
rb_io_check_closed(fptr);
if (!(fptr->mode & FMODE_WRITABLE)) {
rb_raise(rb_eIOError, "not opened for writing");
}
if (fptr->rbuf.len) {
io_unread(fptr);
}
}
int
rb_io_read_pending(rb_io_t *fptr)
{
/* This function is used for bytes and chars. Confusing. */
if (READ_CHAR_PENDING(fptr))
return 1; /* should raise? */
return READ_DATA_PENDING(fptr);
}
void
rb_io_read_check(rb_io_t *fptr)
{
if (!READ_DATA_PENDING(fptr)) {
rb_thread_wait_fd(fptr->fd);
}
return;
}
int
rb_gc_for_fd(int err)
{
if (err == EMFILE || err == ENFILE || err == ENOMEM) {
rb_gc();
return 1;
}
return 0;
}
static int
ruby_dup(int orig)
{
int fd;
fd = rb_cloexec_dup(orig);
if (fd < 0) {
int e = errno;
if (rb_gc_for_fd(e)) {
fd = rb_cloexec_dup(orig);
}
if (fd < 0) {
rb_syserr_fail(e, 0);
}
}
rb_update_max_fd(fd);
return fd;
}
static VALUE
io_alloc(VALUE klass)
{
NEWOBJ_OF(io, struct RFile, klass, T_FILE);
io->fptr = 0;
return (VALUE)io;
}
#ifndef S_ISREG
# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#endif
struct io_internal_read_struct {
int fd;
void *buf;
size_t capa;
};
struct io_internal_write_struct {
int fd;
const void *buf;
size_t capa;
};
#ifdef HAVE_WRITEV
struct io_internal_writev_struct {
int fd;
int iovcnt;
const struct iovec *iov;
};
#endif
static VALUE
internal_read_func(void *ptr)
{
struct io_internal_read_struct *iis = ptr;
return read(iis->fd, iis->buf, iis->capa);
}
static VALUE
internal_write_func(void *ptr)
{
struct io_internal_write_struct *iis = ptr;
return write(iis->fd, iis->buf, iis->capa);
}
static void*
internal_write_func2(void *ptr)
{
struct io_internal_write_struct *iis = ptr;
return (void*)(intptr_t)write(iis->fd, iis->buf, iis->capa);
}
#ifdef HAVE_WRITEV
static VALUE
internal_writev_func(void *ptr)
{
struct io_internal_writev_struct *iis = ptr;
return writev(iis->fd, iis->iov, iis->iovcnt);
}
#endif
static ssize_t
rb_read_internal(int fd, void *buf, size_t count)
{
struct io_internal_read_struct iis;
iis.fd = fd;
iis.buf = buf;
iis.capa = count;
return (ssize_t)rb_thread_io_blocking_region(internal_read_func, &iis, fd);
}
static ssize_t
rb_write_internal(int fd, const void *buf, size_t count)
{
struct io_internal_write_struct iis;
iis.fd = fd;
iis.buf = buf;
iis.capa = count;
return (ssize_t)rb_thread_io_blocking_region(internal_write_func, &iis, fd);
}
static ssize_t
rb_write_internal2(int fd, const void *buf, size_t count)
{
struct io_internal_write_struct iis;
iis.fd = fd;
iis.buf = buf;
iis.capa = count;
return (ssize_t)rb_thread_call_without_gvl2(internal_write_func2, &iis,
RUBY_UBF_IO, NULL);
}
#ifdef HAVE_WRITEV
static ssize_t
rb_writev_internal(int fd, const struct iovec *iov, int iovcnt)
{
struct io_internal_writev_struct iis;
iis.fd = fd;
iis.iov = iov;
iis.iovcnt = iovcnt;
return (ssize_t)rb_thread_io_blocking_region(internal_writev_func, &iis, fd);
}
#endif
static VALUE
io_flush_buffer_sync(void *arg)
{
rb_io_t *fptr = arg;
long l = fptr->wbuf.len;
ssize_t r = write(fptr->fd, fptr->wbuf.ptr+fptr->wbuf.off, (size_t)l);
if (fptr->wbuf.len <= r) {
fptr->wbuf.off = 0;
fptr->wbuf.len = 0;
return 0;
}
if (0 <= r) {
fptr->wbuf.off += (int)r;
fptr->wbuf.len -= (int)r;
errno = EAGAIN;
}
return (VALUE)-1;
}
static void*
io_flush_buffer_sync2(void *arg)
{
VALUE result = io_flush_buffer_sync(arg);
/*
* rb_thread_call_without_gvl2 uses 0 as interrupted.
* So, we need to avoid to use 0.
*/
return !result ? (void*)1 : (void*)result;
}
static VALUE
io_flush_buffer_async(VALUE arg)
{
rb_io_t *fptr = (rb_io_t *)arg;
return rb_thread_io_blocking_region(io_flush_buffer_sync, fptr, fptr->fd);
}
static VALUE
io_flush_buffer_async2(VALUE arg)
{
rb_io_t *fptr = (rb_io_t *)arg;
VALUE ret;
ret = (VALUE)rb_thread_call_without_gvl2(io_flush_buffer_sync2, fptr,
RUBY_UBF_IO, NULL);
if (!ret) {
/* pending async interrupt is there. */
errno = EAGAIN;
return -1;
}
else if (ret == 1) {
return 0;
}
return ret;
}
static inline int
io_flush_buffer(rb_io_t *fptr)
{
if (fptr->write_lock) {
if (rb_mutex_owned_p(fptr->write_lock))
return (int)io_flush_buffer_async2((VALUE)fptr);
else
return (int)rb_mutex_synchronize(fptr->write_lock, io_flush_buffer_async2, (VALUE)fptr);
}
else {
return (int)io_flush_buffer_async((VALUE)fptr);
}
}
static int
io_fflush(rb_io_t *fptr)
{
rb_io_check_closed(fptr);
if (fptr->wbuf.len == 0)
return 0;
rb_io_check_closed(fptr);
while (fptr->wbuf.len > 0 && io_flush_buffer(fptr) != 0) {
if (!rb_io_wait_writable(fptr->fd))
return -1;
rb_io_check_closed(fptr);
}
return 0;
}
int
rb_io_wait_readable(int f)
{
if (f < 0) {
rb_raise(rb_eIOError, closed_stream);
}
switch (errno) {
case EINTR:
#if defined(ERESTART)
case ERESTART:
#endif
rb_thread_check_ints();
return TRUE;
case EAGAIN:
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
rb_thread_wait_fd(f);
return TRUE;
default:
return FALSE;
}
}
int
rb_io_wait_writable(int f)
{
if (f < 0) {
rb_raise(rb_eIOError, closed_stream);
}
switch (errno) {
case EINTR:
#if defined(ERESTART)
case ERESTART:
#endif
/*
* In old Linux, several special files under /proc and /sys don't handle
* select properly. Thus we need avoid to call if don't use O_NONBLOCK.
* Otherwise, we face nasty hang up. Sigh.
* e.g. http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=31b07093c44a7a442394d44423e21d783f5523b8
* http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=31b07093c44a7a442394d44423e21d783f5523b8
* In EINTR case, we only need to call RUBY_VM_CHECK_INTS_BLOCKING().
* Then rb_thread_check_ints() is enough.
*/
rb_thread_check_ints();
return TRUE;
case EAGAIN:
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
rb_thread_fd_writable(f);
return TRUE;
default:
return FALSE;
}
}
static void
make_writeconv(rb_io_t *fptr)
{
if (!fptr->writeconv_initialized) {
const char *senc, *denc;
rb_encoding *enc;
int ecflags;
VALUE ecopts;
fptr->writeconv_initialized = 1;
ecflags = fptr->encs.ecflags & ~ECONV_NEWLINE_DECORATOR_READ_MASK;
ecopts = fptr->encs.ecopts;
if (!fptr->encs.enc || (fptr->encs.enc == rb_ascii8bit_encoding() && !fptr->encs.enc2)) {
/* no encoding conversion */
fptr->writeconv_pre_ecflags = 0;
fptr->writeconv_pre_ecopts = Qnil;
fptr->writeconv = rb_econv_open_opts("", "", ecflags, ecopts);
if (!fptr->writeconv)
rb_exc_raise(rb_econv_open_exc("", "", ecflags));
fptr->writeconv_asciicompat = Qnil;
}
else {
enc = fptr->encs.enc2 ? fptr->encs.enc2 : fptr->encs.enc;
senc = rb_econv_asciicompat_encoding(rb_enc_name(enc));
if (!senc && !(fptr->encs.ecflags & ECONV_STATEFUL_DECORATOR_MASK)) {
/* single conversion */
fptr->writeconv_pre_ecflags = ecflags;
fptr->writeconv_pre_ecopts = ecopts;
fptr->writeconv = NULL;
fptr->writeconv_asciicompat = Qnil;
}
else {
/* double conversion */
fptr->writeconv_pre_ecflags = ecflags & ~ECONV_STATEFUL_DECORATOR_MASK;
fptr->writeconv_pre_ecopts = ecopts;
if (senc) {
denc = rb_enc_name(enc);
fptr->writeconv_asciicompat = rb_str_new2(senc);
}
else {
senc = denc = "";
fptr->writeconv_asciicompat = rb_str_new2(rb_enc_name(enc));
}
ecflags = fptr->encs.ecflags & (ECONV_ERROR_HANDLER_MASK|ECONV_STATEFUL_DECORATOR_MASK);
ecopts = fptr->encs.ecopts;
fptr->writeconv = rb_econv_open_opts(senc, denc, ecflags, ecopts);
if (!fptr->writeconv)
rb_exc_raise(rb_econv_open_exc(senc, denc, ecflags));
}
}
}
}
/* writing functions */
struct binwrite_arg {
rb_io_t *fptr;
VALUE str;
const char *ptr;
long length;
};
struct write_arg {
VALUE io;
VALUE str;
int nosync;
};
#ifdef HAVE_WRITEV
static VALUE
io_binwrite_string(VALUE arg)
{
struct binwrite_arg *p = (struct binwrite_arg *)arg;
rb_io_t *fptr = p->fptr;
long r;
if (fptr->wbuf.len) {
struct iovec iov[2];
iov[0].iov_base = fptr->wbuf.ptr+fptr->wbuf.off;
iov[0].iov_len = fptr->wbuf.len;
iov[1].iov_base = (char *)p->ptr;
iov[1].iov_len = p->length;
r = rb_writev_internal(fptr->fd, iov, 2);
if (r == -1)
return -1;
if (fptr->wbuf.len <= r) {
r -= fptr->wbuf.len;
fptr->wbuf.off = 0;
fptr->wbuf.len = 0;
}
else {
fptr->wbuf.off += (int)r;
fptr->wbuf.len -= (int)r;
r = 0L;
}
}
else {
r = rb_write_internal(fptr->fd, p->ptr, p->length);
}
return r;
}
#else
static VALUE
io_binwrite_string(VALUE arg)
{
struct binwrite_arg *p = (struct binwrite_arg *)arg;
rb_io_t *fptr = p->fptr;
long l, len;
l = len = p->length;
if (fptr->wbuf.len) {
if (fptr->wbuf.len+len <= fptr->wbuf.capa) {
if (fptr->wbuf.capa < fptr->wbuf.off+fptr->wbuf.len+len) {
MEMMOVE(fptr->wbuf.ptr, fptr->wbuf.ptr+fptr->wbuf.off, char, fptr->wbuf.len);
fptr->wbuf.off = 0;
}
MEMMOVE(fptr->wbuf.ptr+fptr->wbuf.off+fptr->wbuf.len, p->ptr, char, len);
fptr->wbuf.len += (int)len;
l = 0;
}
if (io_fflush(fptr) < 0)
return -2L; /* fail in fflush */
if (l == 0)
return len;
}
if (fptr->stdio_file != stderr && !rb_thread_fd_writable(fptr->fd))
rb_io_check_closed(fptr);
return rb_write_internal(p->fptr->fd, p->ptr, p->length);
}
#endif
static long
io_binwrite(VALUE str, const char *ptr, long len, rb_io_t *fptr, int nosync)
{
long n, r, offset = 0;
/* don't write anything if current thread has a pending interrupt. */
rb_thread_check_ints();
if ((n = len) <= 0) return n;
if (fptr->wbuf.ptr == NULL && !(!nosync && (fptr->mode & FMODE_SYNC))) {
fptr->wbuf.off = 0;
fptr->wbuf.len = 0;
fptr->wbuf.capa = IO_WBUF_CAPA_MIN;
fptr->wbuf.ptr = ALLOC_N(char, fptr->wbuf.capa);
fptr->write_lock = rb_mutex_new();
rb_mutex_allow_trap(fptr->write_lock, 1);
}
if ((!nosync && (fptr->mode & (FMODE_SYNC|FMODE_TTY))) ||
(fptr->wbuf.ptr && fptr->wbuf.capa <= fptr->wbuf.len + len)) {
struct binwrite_arg arg;
arg.fptr = fptr;
arg.str = str;
retry:
arg.ptr = ptr + offset;
arg.length = n;
if (fptr->write_lock) {
r = rb_mutex_synchronize(fptr->write_lock, io_binwrite_string, (VALUE)&arg);
}
else {
r = io_binwrite_string((VALUE)&arg);
}
/* xxx: other threads may modify given string. */
if (r == n) return len;
if (0 <= r) {
offset += r;
n -= r;
errno = EAGAIN;
}
if (r == -2L)
return -1L;
if (rb_io_wait_writable(fptr->fd)) {
rb_io_check_closed(fptr);
if (offset < len)
goto retry;
}
return -1L;
}
if (fptr->wbuf.off) {
if (fptr->wbuf.len)
MEMMOVE(fptr->wbuf.ptr, fptr->wbuf.ptr+fptr->wbuf.off, char, fptr->wbuf.len);
fptr->wbuf.off = 0;
}
MEMMOVE(fptr->wbuf.ptr+fptr->wbuf.off+fptr->wbuf.len, ptr+offset, char, len);
fptr->wbuf.len += (int)len;
return len;
}
# define MODE_BTMODE(a,b,c) ((fmode & FMODE_BINMODE) ? (b) : \
(fmode & FMODE_TEXTMODE) ? (c) : (a))
static VALUE
do_writeconv(VALUE str, rb_io_t *fptr, int *converted)
{
if (NEED_WRITECONV(fptr)) {
VALUE common_encoding = Qnil;
SET_BINARY_MODE(fptr);
make_writeconv(fptr);
if (fptr->writeconv) {
#define fmode (fptr->mode)
if (!NIL_P(fptr->writeconv_asciicompat))
common_encoding = fptr->writeconv_asciicompat;
else if (MODE_BTMODE(DEFAULT_TEXTMODE,0,1) && !rb_enc_asciicompat(rb_enc_get(str))) {
rb_raise(rb_eArgError, "ASCII incompatible string written for text mode IO without encoding conversion: %s",
rb_enc_name(rb_enc_get(str)));
}
#undef fmode
}
else {
if (fptr->encs.enc2)
common_encoding = rb_enc_from_encoding(fptr->encs.enc2);
else if (fptr->encs.enc != rb_ascii8bit_encoding())
common_encoding = rb_enc_from_encoding(fptr->encs.enc);
}
if (!NIL_P(common_encoding)) {
str = rb_str_encode(str, common_encoding,
fptr->writeconv_pre_ecflags, fptr->writeconv_pre_ecopts);
*converted = 1;
}
if (fptr->writeconv) {
str = rb_econv_str_convert(fptr->writeconv, str, ECONV_PARTIAL_INPUT);
*converted = 1;
}
}
#if defined(RUBY_TEST_CRLF_ENVIRONMENT) || defined(_WIN32)
#define fmode (fptr->mode)
else if (MODE_BTMODE(DEFAULT_TEXTMODE,0,1)) {
if ((fptr->mode & FMODE_READABLE) &&
!(fptr->encs.ecflags & ECONV_NEWLINE_DECORATOR_MASK)) {
setmode(fptr->fd, O_BINARY);
}
else {
setmode(fptr->fd, O_TEXT);
}
if (!rb_enc_asciicompat(rb_enc_get(str))) {
rb_raise(rb_eArgError, "ASCII incompatible string written for text mode IO without encoding conversion: %s",
rb_enc_name(rb_enc_get(str)));
}
}
#undef fmode
#endif
return str;
}
static long
io_fwrite(VALUE str, rb_io_t *fptr, int nosync)
{
int converted = 0;
VALUE tmp;
long n, len;
const char *ptr;
#ifdef _WIN32
if (fptr->mode & FMODE_TTY) {
long len = rb_w32_write_console(str, fptr->fd);
if (len > 0) return len;
}
#endif
str = do_writeconv(str, fptr, &converted);
if (converted)
OBJ_FREEZE(str);
tmp = rb_str_tmp_frozen_acquire(str);
RSTRING_GETMEM(tmp, ptr, len);
n = io_binwrite(tmp, ptr, len, fptr, nosync);
rb_str_tmp_frozen_release(str, tmp);
return n;
}
ssize_t
rb_io_bufwrite(VALUE io, const void *buf, size_t size)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_writable(fptr);
return (ssize_t)io_binwrite(0, buf, (long)size, fptr, 0);
}
static VALUE
io_write(VALUE io, VALUE str, int nosync)
{
rb_io_t *fptr;
long n;
VALUE tmp;
io = GetWriteIO(io);
str = rb_obj_as_string(str);
tmp = rb_io_check_io(io);
if (NIL_P(tmp)) {
/* port is not IO, call write method for it. */
return rb_funcall(io, id_write, 1, str);
}
io = tmp;
if (RSTRING_LEN(str) == 0) return INT2FIX(0);
GetOpenFile(io, fptr);
rb_io_check_writable(fptr);
n = io_fwrite(str, fptr, nosync);
if (n == -1L) rb_sys_fail_path(fptr->pathv);
return LONG2FIX(n);
}
#ifdef HAVE_WRITEV
struct binwritev_arg {
rb_io_t *fptr;
const struct iovec *iov;
int iovcnt;
};
static VALUE
call_writev_internal(VALUE arg)
{
struct binwritev_arg *p = (struct binwritev_arg *)arg;
return rb_writev_internal(p->fptr->fd, p->iov, p->iovcnt);
}
static long
io_binwritev(struct iovec *iov, int iovcnt, rb_io_t *fptr)
{
int i;
long r, total = 0, written_len = 0;
/* don't write anything if current thread has a pending interrupt. */
rb_thread_check_ints();
if (iovcnt == 0) return 0;
for (i = 1; i < iovcnt; i++) total += iov[i].iov_len;
if (fptr->wbuf.ptr == NULL && !(fptr->mode & FMODE_SYNC)) {
fptr->wbuf.off = 0;
fptr->wbuf.len = 0;
fptr->wbuf.capa = IO_WBUF_CAPA_MIN;
fptr->wbuf.ptr = ALLOC_N(char, fptr->wbuf.capa);
fptr->write_lock = rb_mutex_new();
rb_mutex_allow_trap(fptr->write_lock, 1);
}
if (fptr->wbuf.ptr && fptr->wbuf.len) {
long offset = fptr->wbuf.off + fptr->wbuf.len;
if (offset + total <= fptr->wbuf.capa) {
for (i = 1; i < iovcnt; i++) {
memcpy(fptr->wbuf.ptr+offset, iov[i].iov_base, iov[i].iov_len);
offset += iov[i].iov_len;
}
fptr->wbuf.len += total;
return total;
}
else {
iov[0].iov_base = fptr->wbuf.ptr + fptr->wbuf.off;
iov[0].iov_len = fptr->wbuf.len;
}
}
else {
iov++;
if (!--iovcnt) return 0;
}
retry:
if (fptr->write_lock) {
struct binwritev_arg arg;
arg.fptr = fptr;
arg.iov = iov;
arg.iovcnt = iovcnt;
r = rb_mutex_synchronize(fptr->write_lock, call_writev_internal, (VALUE)&arg);
}
else {
r = rb_writev_internal(fptr->fd, iov, iovcnt);
}
if (r >= 0) {
written_len += r;
if (fptr->wbuf.ptr && fptr->wbuf.len) {
if (written_len < fptr->wbuf.len) {
fptr->wbuf.off += r;
fptr->wbuf.len -= r;
}
else {
written_len -= fptr->wbuf.len;
fptr->wbuf.off = 0;
fptr->wbuf.len = 0;
}
}
if (written_len == total) return total;
while (r >= (ssize_t)iov->iov_len) {
/* iovcnt > 0 */
r -= iov->iov_len;
iov->iov_len = 0;
iov++;
if (!--iovcnt) return total;
/* defensive check: written_len should == total */
}
iov->iov_base = (char *)iov->iov_base + r;
iov->iov_len -= r;
errno = EAGAIN;
}
if (rb_io_wait_writable(fptr->fd)) {
rb_io_check_closed(fptr);
goto retry;
}
return -1L;
}
static long
io_fwritev(int argc, VALUE *argv, rb_io_t *fptr)
{
int i, converted, iovcnt = argc + 1;
long n;
VALUE v1, v2, str, tmp, *tmp_array;
struct iovec *iov;
iov = ALLOCV_N(struct iovec, v1, iovcnt);
tmp_array = ALLOCV_N(VALUE, v2, argc);
for (i = 0; i < argc; i++) {
str = rb_obj_as_string(argv[i]);
converted = 0;
str = do_writeconv(str, fptr, &converted);
if (converted)
OBJ_FREEZE(str);
tmp = rb_str_tmp_frozen_acquire(str);
tmp_array[i] = tmp;
/* iov[0] is reserved for buffer of fptr */
iov[i+1].iov_base = RSTRING_PTR(tmp);
iov[i+1].iov_len = RSTRING_LEN(tmp);
}
n = io_binwritev(iov, iovcnt, fptr);
if (v1) ALLOCV_END(v1);
for (i = 0; i < argc; i++) {
rb_str_tmp_frozen_release(argv[i], tmp_array[i]);
}
if (v2) ALLOCV_END(v2);
return n;
}
#endif /* HAVE_WRITEV */
static VALUE
io_writev(int argc, VALUE *argv, VALUE io)
{
rb_io_t *fptr;
long n;
VALUE tmp, total = INT2FIX(0);
int i, cnt = 1;
io = GetWriteIO(io);
tmp = rb_io_check_io(io);
if (NIL_P(tmp)) {
/* port is not IO, call write method for it. */
return rb_funcallv(io, id_write, argc, argv);
}
io = tmp;
GetOpenFile(io, fptr);
rb_io_check_writable(fptr);
for (i = 0; i < argc; i += cnt) {
#ifdef HAVE_WRITEV
if ((fptr->mode & (FMODE_SYNC|FMODE_TTY)) && ((cnt = argc - i) < IOV_MAX)) {
n = io_fwritev(cnt, &argv[i], fptr);
}
else
#endif
{
cnt = 1;
/* sync at last item */
n = io_fwrite(rb_obj_as_string(argv[i]), fptr, (i < argc-1));
}
if (n == -1L) rb_sys_fail_path(fptr->pathv);
total = rb_fix_plus(LONG2FIX(n), total);
}
return total;
}
/*
* call-seq:
* ios.write(string, ...) -> integer
*
* Writes the given strings to <em>ios</em>. The stream must be opened
* for writing. Arguments that are not a string will be converted
* to a string using <code>to_s</code>. Returns the number of bytes
* written in total.
*
* count = $stdout.write("This is", " a test\n")
* puts "That was #{count} bytes of data"
*
* <em>produces:</em>
*
* This is a test
* That was 15 bytes of data
*/
static VALUE
io_write_m(int argc, VALUE *argv, VALUE io)
{
if (argc > 1) {
return io_writev(argc, argv, io);
}
else {
VALUE str = argv[0];
return io_write(io, str, 0);
}
}
VALUE
rb_io_write(VALUE io, VALUE str)
{
return rb_funcallv(io, id_write, 1, &str);
}
static VALUE
rb_io_writev(VALUE io, int argc, VALUE *argv)
{
if (argc > 1 && rb_obj_method_arity(io, id_write) == 1) {
if (io != rb_stderr && RTEST(ruby_verbose)) {
VALUE klass = CLASS_OF(io);
char sep = FL_TEST(klass, FL_SINGLETON) ? (klass = io, '.') : '#';
rb_warning("%+"PRIsVALUE"%c""write is outdated interface"
" which accepts just one argument",
klass, sep);
}
do rb_io_write(io, *argv++); while (--argc);
return argv[0]; /* unused right now */
}
return rb_funcallv(io, id_write, argc, argv);
}
/*
* call-seq:
* ios << obj -> ios
*
* String Output---Writes <i>obj</i> to <em>ios</em>.
* <i>obj</i> will be converted to a string using
* <code>to_s</code>.
*
* $stdout << "Hello " << "world!\n"
*
* <em>produces:</em>
*
* Hello world!
*/
VALUE
rb_io_addstr(VALUE io, VALUE str)
{
rb_io_write(io, str);
return io;
}
#ifdef HAVE_FSYNC
static VALUE
nogvl_fsync(void *ptr)
{
rb_io_t *fptr = ptr;
#ifdef _WIN32
if (GetFileType((HANDLE)rb_w32_get_osfhandle(fptr->fd)) != FILE_TYPE_DISK)
return 0;
#endif
return (VALUE)fsync(fptr->fd);
}
#endif
VALUE
rb_io_flush_raw(VALUE io, int sync)
{
rb_io_t *fptr;
if (!RB_TYPE_P(io, T_FILE)) {
return rb_funcall(io, id_flush, 0);
}
io = GetWriteIO(io);
GetOpenFile(io, fptr);
if (fptr->mode & FMODE_WRITABLE) {
if (io_fflush(fptr) < 0)
rb_sys_fail(0);
}
if (fptr->mode & FMODE_READABLE) {
io_unread(fptr);
}
return io;
}
/*
* call-seq:
* ios.flush -> ios
*
* Flushes any buffered data within <em>ios</em> to the underlying
* operating system (note that this is Ruby internal buffering only;
* the OS may buffer the data as well).
*
* $stdout.print "no newline"
* $stdout.flush
*
* <em>produces:</em>
*
* no newline
*/
VALUE
rb_io_flush(VALUE io)
{
return rb_io_flush_raw(io, 1);
}
/*
* call-seq:
* ios.pos -> integer
* ios.tell -> integer
*
* Returns the current offset (in bytes) of <em>ios</em>.
*
* f = File.new("testfile")
* f.pos #=> 0
* f.gets #=> "This is line one\n"
* f.pos #=> 17
*/
static VALUE
rb_io_tell(VALUE io)
{
rb_io_t *fptr;
off_t pos;
GetOpenFile(io, fptr);
pos = io_tell(fptr);
if (pos < 0 && errno) rb_sys_fail_path(fptr->pathv);
pos -= fptr->rbuf.len;
return OFFT2NUM(pos);
}
static VALUE
rb_io_seek(VALUE io, VALUE offset, int whence)
{
rb_io_t *fptr;
off_t pos;
pos = NUM2OFFT(offset);
GetOpenFile(io, fptr);
pos = io_seek(fptr, pos, whence);
if (pos < 0 && errno) rb_sys_fail_path(fptr->pathv);
return INT2FIX(0);
}
static int
interpret_seek_whence(VALUE vwhence)
{
if (vwhence == sym_SET)
return SEEK_SET;
if (vwhence == sym_CUR)
return SEEK_CUR;
if (vwhence == sym_END)
return SEEK_END;
#ifdef SEEK_DATA
if (vwhence == sym_DATA)
return SEEK_DATA;
#endif
#ifdef SEEK_HOLE
if (vwhence == sym_HOLE)
return SEEK_HOLE;
#endif
return NUM2INT(vwhence);
}
/*
* call-seq:
* ios.seek(amount, whence=IO::SEEK_SET) -> 0
*
* Seeks to a given offset <i>anInteger</i> in the stream according to
* the value of <i>whence</i>:
*
* :CUR or IO::SEEK_CUR | Seeks to _amount_ plus current position
* ----------------------+--------------------------------------------------
* :END or IO::SEEK_END | Seeks to _amount_ plus end of stream (you
* | probably want a negative value for _amount_)
* ----------------------+--------------------------------------------------
* :SET or IO::SEEK_SET | Seeks to the absolute location given by _amount_
*
* Example:
*
* f = File.new("testfile")
* f.seek(-13, IO::SEEK_END) #=> 0
* f.readline #=> "And so on...\n"
*/
static VALUE
rb_io_seek_m(int argc, VALUE *argv, VALUE io)
{
VALUE offset, ptrname;
int whence = SEEK_SET;
if (rb_scan_args(argc, argv, "11", &offset, &ptrname) == 2) {
whence = interpret_seek_whence(ptrname);
}
return rb_io_seek(io, offset, whence);
}
/*
* call-seq:
* ios.pos = integer -> integer
*
* Seeks to the given position (in bytes) in <em>ios</em>.
* It is not guaranteed that seeking to the right position when <em>ios</em>
* is textmode.
*
* f = File.new("testfile")
* f.pos = 17
* f.gets #=> "This is line two\n"
*/
static VALUE
rb_io_set_pos(VALUE io, VALUE offset)
{
rb_io_t *fptr;
off_t pos;
pos = NUM2OFFT(offset);
GetOpenFile(io, fptr);
pos = io_seek(fptr, pos, SEEK_SET);
if (pos < 0 && errno) rb_sys_fail_path(fptr->pathv);
return OFFT2NUM(pos);
}
static void clear_readconv(rb_io_t *fptr);
/*
* call-seq:
* ios.rewind -> 0
*
* Positions <em>ios</em> to the beginning of input, resetting
* <code>lineno</code> to zero.
*
* f = File.new("testfile")
* f.readline #=> "This is line one\n"
* f.rewind #=> 0
* f.lineno #=> 0
* f.readline #=> "This is line one\n"
*
* Note that it cannot be used with streams such as pipes, ttys, and sockets.
*/
static VALUE
rb_io_rewind(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (io_seek(fptr, 0L, 0) < 0 && errno) rb_sys_fail_path(fptr->pathv);
if (io == ARGF.current_file) {
ARGF.lineno -= fptr->lineno;
}
fptr->lineno = 0;
if (fptr->readconv) {
clear_readconv(fptr);
}
return INT2FIX(0);
}
static int
io_fillbuf(rb_io_t *fptr)
{
ssize_t r;
if (fptr->rbuf.ptr == NULL) {
fptr->rbuf.off = 0;
fptr->rbuf.len = 0;
fptr->rbuf.capa = IO_RBUF_CAPA_FOR(fptr);
fptr->rbuf.ptr = ALLOC_N(char, fptr->rbuf.capa);
#ifdef _WIN32
fptr->rbuf.capa--;
#endif
}
if (fptr->rbuf.len == 0) {
retry:
{
r = rb_read_internal(fptr->fd, fptr->rbuf.ptr, fptr->rbuf.capa);
}
if (r < 0) {
if (rb_io_wait_readable(fptr->fd))
goto retry;
{
int e = errno;
VALUE path = rb_sprintf("fd:%d ", fptr->fd);
if (!NIL_P(fptr->pathv)) {
rb_str_append(path, fptr->pathv);
}
rb_syserr_fail_path(e, path);
}
}
if (r > 0) rb_io_check_closed(fptr);
fptr->rbuf.off = 0;
fptr->rbuf.len = (int)r; /* r should be <= rbuf_capa */
if (r == 0)
return -1; /* EOF */
}
return 0;
}
/*
* call-seq:
* ios.eof -> true or false
* ios.eof? -> true or false
*
* Returns true if <em>ios</em> is at end of file that means
* there are no more data to read.
* The stream must be opened for reading or an <code>IOError</code> will be
* raised.
*
* f = File.new("testfile")
* dummy = f.readlines
* f.eof #=> true
*
* If <em>ios</em> is a stream such as pipe or socket, <code>IO#eof?</code>
* blocks until the other end sends some data or closes it.
*
* r, w = IO.pipe
* Thread.new { sleep 1; w.close }
* r.eof? #=> true after 1 second blocking
*
* r, w = IO.pipe
* Thread.new { sleep 1; w.puts "a" }
* r.eof? #=> false after 1 second blocking
*
* r, w = IO.pipe
* r.eof? # blocks forever
*
* Note that <code>IO#eof?</code> reads data to the input byte buffer.
* So <code>IO#sysread</code> may not behave as you intend with
* <code>IO#eof?</code>, unless you call <code>IO#rewind</code>
* first (which is not available for some streams).
*/
VALUE
rb_io_eof(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_char_readable(fptr);
if (READ_CHAR_PENDING(fptr)) return Qfalse;
if (READ_DATA_PENDING(fptr)) return Qfalse;
READ_CHECK(fptr);
#if defined(RUBY_TEST_CRLF_ENVIRONMENT) || defined(_WIN32)
if (!NEED_READCONV(fptr) && NEED_NEWLINE_DECORATOR_ON_READ(fptr)) {
return eof(fptr->fd) ? Qtrue : Qfalse;
}
#endif
if (io_fillbuf(fptr) < 0) {
return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* ios.sync -> true or false
*
* Returns the current ``sync mode'' of <em>ios</em>. When sync mode is
* true, all output is immediately flushed to the underlying operating
* system and is not buffered by Ruby internally. See also
* <code>IO#fsync</code>.
*
* f = File.new("testfile")
* f.sync #=> false
*/
static VALUE
rb_io_sync(VALUE io)
{
rb_io_t *fptr;
io = GetWriteIO(io);
GetOpenFile(io, fptr);
return (fptr->mode & FMODE_SYNC) ? Qtrue : Qfalse;
}
#ifdef HAVE_FSYNC
/*
* call-seq:
* ios.sync = boolean -> boolean
*
* Sets the ``sync mode'' to <code>true</code> or <code>false</code>.
* When sync mode is true, all output is immediately flushed to the
* underlying operating system and is not buffered internally. Returns
* the new state. See also <code>IO#fsync</code>.
*
* f = File.new("testfile")
* f.sync = true
*/
static VALUE
rb_io_set_sync(VALUE io, VALUE sync)
{
rb_io_t *fptr;
io = GetWriteIO(io);
GetOpenFile(io, fptr);
if (RTEST(sync)) {
fptr->mode |= FMODE_SYNC;
}
else {
fptr->mode &= ~FMODE_SYNC;
}
return sync;
}
/*
* call-seq:
* ios.fsync -> 0 or nil
*
* Immediately writes all buffered data in <em>ios</em> to disk.
* Note that <code>fsync</code> differs from
* using <code>IO#sync=</code>. The latter ensures that data is flushed
* from Ruby's buffers, but does not guarantee that the underlying
* operating system actually writes it to disk.
*
* <code>NotImplementedError</code> is raised
* if the underlying operating system does not support <em>fsync(2)</em>.
*/
static VALUE
rb_io_fsync(VALUE io)
{
rb_io_t *fptr;
io = GetWriteIO(io);
GetOpenFile(io, fptr);
if (io_fflush(fptr) < 0)
rb_sys_fail(0);
if ((int)rb_thread_io_blocking_region(nogvl_fsync, fptr, fptr->fd) < 0)
rb_sys_fail_path(fptr->pathv);
return INT2FIX(0);
}
#else
# define rb_io_fsync rb_f_notimplement
# define rb_io_sync rb_f_notimplement
static VALUE
rb_io_set_sync(VALUE io, VALUE sync)
{
rb_notimplement();
UNREACHABLE;
}
#endif
#ifdef HAVE_FDATASYNC
static VALUE
nogvl_fdatasync(void *ptr)
{
rb_io_t *fptr = ptr;
#ifdef _WIN32
if (GetFileType((HANDLE)rb_w32_get_osfhandle(fptr->fd)) != FILE_TYPE_DISK)
return 0;
#endif
return (VALUE)fdatasync(fptr->fd);
}
/*
* call-seq:
* ios.fdatasync -> 0 or nil
*
* Immediately writes all buffered data in <em>ios</em> to disk.
*
* If the underlying operating system does not support <em>fdatasync(2)</em>,
* <code>IO#fsync</code> is called instead (which might raise a
* <code>NotImplementedError</code>).
*/
static VALUE
rb_io_fdatasync(VALUE io)
{
rb_io_t *fptr;
io = GetWriteIO(io);
GetOpenFile(io, fptr);
if (io_fflush(fptr) < 0)
rb_sys_fail(0);
if ((int)rb_thread_io_blocking_region(nogvl_fdatasync, fptr, fptr->fd) == 0)
return INT2FIX(0);
/* fall back */
return rb_io_fsync(io);
}
#else
#define rb_io_fdatasync rb_io_fsync
#endif
/*
* call-seq:
* ios.fileno -> integer
* ios.to_i -> integer
*
* Returns an integer representing the numeric file descriptor for
* <em>ios</em>.
*
* $stdin.fileno #=> 0
* $stdout.fileno #=> 1
*/
static VALUE
rb_io_fileno(VALUE io)
{
rb_io_t *fptr = RFILE(io)->fptr;
int fd;
rb_io_check_closed(fptr);
fd = fptr->fd;
return INT2FIX(fd);
}
/*
* call-seq:
* ios.pid -> integer
*
* Returns the process ID of a child process associated with
* <em>ios</em>. This will be set by <code>IO.popen</code>.
*
* pipe = IO.popen("-")
* if pipe
* $stderr.puts "In parent, child pid is #{pipe.pid}"
* else
* $stderr.puts "In child, pid is #{$$}"
* end
*
* <em>produces:</em>
*
* In child, pid is 26209
* In parent, child pid is 26209
*/
static VALUE
rb_io_pid(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (!fptr->pid)
return Qnil;
return PIDT2NUM(fptr->pid);
}
/*
* call-seq:
* ios.inspect -> string
*
* Return a string describing this IO object.
*/
static VALUE
rb_io_inspect(VALUE obj)
{
rb_io_t *fptr;
VALUE result;
static const char closed[] = " (closed)";
fptr = RFILE(obj)->fptr;
if (!fptr) return rb_any_to_s(obj);
result = rb_str_new_cstr("#<");
rb_str_append(result, rb_class_name(CLASS_OF(obj)));
rb_str_cat2(result, ":");
if (NIL_P(fptr->pathv)) {
if (fptr->fd < 0) {
rb_str_cat(result, closed+1, strlen(closed)-1);
}
else {
rb_str_catf(result, "fd %d", fptr->fd);
}
}
else {
rb_str_append(result, fptr->pathv);
if (fptr->fd < 0) {
rb_str_cat(result, closed, strlen(closed));
}
}
return rb_str_cat2(result, ">");
}
/*
* call-seq:
* ios.to_io -> ios
*
* Returns <em>ios</em>.
*/
static VALUE
rb_io_to_io(VALUE io)
{
return io;
}
/* reading functions */
static long
read_buffered_data(char *ptr, long len, rb_io_t *fptr)
{
int n;
n = READ_DATA_PENDING_COUNT(fptr);
if (n <= 0) return 0;
if (n > len) n = (int)len;
MEMMOVE(ptr, fptr->rbuf.ptr+fptr->rbuf.off, char, n);
fptr->rbuf.off += n;
fptr->rbuf.len -= n;
return n;
}
static long
io_bufread(char *ptr, long len, rb_io_t *fptr)
{
long offset = 0;
long n = len;
long c;
if (READ_DATA_PENDING(fptr) == 0) {
while (n > 0) {
again:
c = rb_read_internal(fptr->fd, ptr+offset, n);
if (c == 0) break;
if (c < 0) {
if (rb_io_wait_readable(fptr->fd))
goto again;
return -1;
}
offset += c;
if ((n -= c) <= 0) break;
}
return len - n;
}
while (n > 0) {
c = read_buffered_data(ptr+offset, n, fptr);
if (c > 0) {
offset += c;
if ((n -= c) <= 0) break;
}
rb_io_check_closed(fptr);
if (io_fillbuf(fptr) < 0) {
break;
}
}
return len - n;
}
static int io_setstrbuf(VALUE *str, long len);
struct bufread_arg {
char *str_ptr;
long len;
rb_io_t *fptr;
};
static VALUE
bufread_call(VALUE arg)
{
struct bufread_arg *p = (struct bufread_arg *)arg;
p->len = io_bufread(p->str_ptr, p->len, p->fptr);
return Qundef;
}
static long
io_fread(VALUE str, long offset, long size, rb_io_t *fptr)
{
long len;
struct bufread_arg arg;
io_setstrbuf(&str, offset + size);
arg.str_ptr = RSTRING_PTR(str) + offset;
arg.len = size;
arg.fptr = fptr;
rb_str_locktmp_ensure(str, bufread_call, (VALUE)&arg);
len = arg.len;
if (len < 0) rb_sys_fail_path(fptr->pathv);
return len;
}
ssize_t
rb_io_bufread(VALUE io, void *buf, size_t size)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_readable(fptr);
return (ssize_t)io_bufread(buf, (long)size, fptr);
}
static long
remain_size(rb_io_t *fptr)
{
struct stat st;
off_t siz = READ_DATA_PENDING_COUNT(fptr);
off_t pos;
if (fstat(fptr->fd, &st) == 0 && S_ISREG(st.st_mode)
#if defined(__HAIKU__)
&& (st.st_dev > 3)
#endif
)
{
if (io_fflush(fptr) < 0)
rb_sys_fail(0);
pos = lseek(fptr->fd, 0, SEEK_CUR);
if (st.st_size >= pos && pos >= 0) {
siz += st.st_size - pos;
if (siz > LONG_MAX) {
rb_raise(rb_eIOError, "file too big for single read");
}
}
}
else {
siz += BUFSIZ;
}
return (long)siz;
}
static VALUE
io_enc_str(VALUE str, rb_io_t *fptr)
{
OBJ_TAINT(str);
rb_enc_associate(str, io_read_encoding(fptr));
return str;
}
static void
make_readconv(rb_io_t *fptr, int size)
{
if (!fptr->readconv) {
int ecflags;
VALUE ecopts;
const char *sname, *dname;
ecflags = fptr->encs.ecflags & ~ECONV_NEWLINE_DECORATOR_WRITE_MASK;
ecopts = fptr->encs.ecopts;
if (fptr->encs.enc2) {
sname = rb_enc_name(fptr->encs.enc2);
dname = rb_enc_name(fptr->encs.enc);
}
else {
sname = dname = "";
}
fptr->readconv = rb_econv_open_opts(sname, dname, ecflags, ecopts);
if (!fptr->readconv)
rb_exc_raise(rb_econv_open_exc(sname, dname, ecflags));
fptr->cbuf.off = 0;
fptr->cbuf.len = 0;
if (size < IO_CBUF_CAPA_MIN) size = IO_CBUF_CAPA_MIN;
fptr->cbuf.capa = size;
fptr->cbuf.ptr = ALLOC_N(char, fptr->cbuf.capa);
}
}
#define MORE_CHAR_SUSPENDED Qtrue
#define MORE_CHAR_FINISHED Qnil
static VALUE
fill_cbuf(rb_io_t *fptr, int ec_flags)
{
const unsigned char *ss, *sp, *se;
unsigned char *ds, *dp, *de;
rb_econv_result_t res;
int putbackable;
int cbuf_len0;
VALUE exc;
ec_flags |= ECONV_PARTIAL_INPUT;
if (fptr->cbuf.len == fptr->cbuf.capa)
return MORE_CHAR_SUSPENDED; /* cbuf full */
if (fptr->cbuf.len == 0)
fptr->cbuf.off = 0;
else if (fptr->cbuf.off + fptr->cbuf.len == fptr->cbuf.capa) {
memmove(fptr->cbuf.ptr, fptr->cbuf.ptr+fptr->cbuf.off, fptr->cbuf.len);
fptr->cbuf.off = 0;
}
cbuf_len0 = fptr->cbuf.len;
while (1) {
ss = sp = (const unsigned char *)fptr->rbuf.ptr + fptr->rbuf.off;
se = sp + fptr->rbuf.len;
ds = dp = (unsigned char *)fptr->cbuf.ptr + fptr->cbuf.off + fptr->cbuf.len;
de = (unsigned char *)fptr->cbuf.ptr + fptr->cbuf.capa;
res = rb_econv_convert(fptr->readconv, &sp, se, &dp, de, ec_flags);
fptr->rbuf.off += (int)(sp - ss);
fptr->rbuf.len -= (int)(sp - ss);
fptr->cbuf.len += (int)(dp - ds);
putbackable = rb_econv_putbackable(fptr->readconv);
if (putbackable) {
rb_econv_putback(fptr->readconv, (unsigned char *)fptr->rbuf.ptr + fptr->rbuf.off - putbackable, putbackable);
fptr->rbuf.off -= putbackable;
fptr->rbuf.len += putbackable;
}
exc = rb_econv_make_exception(fptr->readconv);
if (!NIL_P(exc))
return exc;
if (cbuf_len0 != fptr->cbuf.len)
return MORE_CHAR_SUSPENDED;
if (res == econv_finished) {
return MORE_CHAR_FINISHED;
}
if (res == econv_source_buffer_empty) {
if (fptr->rbuf.len == 0) {
READ_CHECK(fptr);
if (io_fillbuf(fptr) == -1) {
if (!fptr->readconv) {
return MORE_CHAR_FINISHED;
}
ds = dp = (unsigned char *)fptr->cbuf.ptr + fptr->cbuf.off + fptr->cbuf.len;
de = (unsigned char *)fptr->cbuf.ptr + fptr->cbuf.capa;
res = rb_econv_convert(fptr->readconv, NULL, NULL, &dp, de, 0);
fptr->cbuf.len += (int)(dp - ds);
rb_econv_check_error(fptr->readconv);
break;
}
}
}
}
if (cbuf_len0 != fptr->cbuf.len)
return MORE_CHAR_SUSPENDED;
return MORE_CHAR_FINISHED;
}
static VALUE
more_char(rb_io_t *fptr)
{
VALUE v;
v = fill_cbuf(fptr, ECONV_AFTER_OUTPUT);
if (v != MORE_CHAR_SUSPENDED && v != MORE_CHAR_FINISHED)
rb_exc_raise(v);
return v;
}
static VALUE
io_shift_cbuf(rb_io_t *fptr, int len, VALUE *strp)
{
VALUE str = Qnil;
if (strp) {
str = *strp;
if (NIL_P(str)) {
*strp = str = rb_str_new(fptr->cbuf.ptr+fptr->cbuf.off, len);
}
else {
rb_str_cat(str, fptr->cbuf.ptr+fptr->cbuf.off, len);
}
OBJ_TAINT(str);
rb_enc_associate(str, fptr->encs.enc);
}
fptr->cbuf.off += len;
fptr->cbuf.len -= len;
/* xxx: set coderange */
if (fptr->cbuf.len == 0)
fptr->cbuf.off = 0;
else if (fptr->cbuf.capa/2 < fptr->cbuf.off) {
memmove(fptr->cbuf.ptr, fptr->cbuf.ptr+fptr->cbuf.off, fptr->cbuf.len);
fptr->cbuf.off = 0;
}
return str;
}
static int
io_setstrbuf(VALUE *str, long len)
{
#ifdef _WIN32
len = (len + 1) & ~1L; /* round up for wide char */
#endif
if (NIL_P(*str)) {
*str = rb_str_new(0, len);
return TRUE;
}
else {
VALUE s = StringValue(*str);
long clen = RSTRING_LEN(s);
if (clen >= len) {
rb_str_modify(s);
return FALSE;
}
len -= clen;
}
rb_str_modify_expand(*str, len);
return FALSE;
}
#define MAX_REALLOC_GAP 4096
static void
io_shrink_read_string(VALUE str, long n)
{
if (rb_str_capacity(str) - n > MAX_REALLOC_GAP) {
rb_str_resize(str, n);
}
}
static void
io_set_read_length(VALUE str, long n, int shrinkable)
{
if (RSTRING_LEN(str) != n) {
rb_str_modify(str);
rb_str_set_len(str, n);
if (shrinkable) io_shrink_read_string(str, n);
}
}
static VALUE
read_all(rb_io_t *fptr, long siz, VALUE str)
{
long bytes;
long n;
long pos;
rb_encoding *enc;
int cr;
int shrinkable;
if (NEED_READCONV(fptr)) {
int first = !NIL_P(str);
SET_BINARY_MODE(fptr);
shrinkable = io_setstrbuf(&str,0);
make_readconv(fptr, 0);
while (1) {
VALUE v;
if (fptr->cbuf.len) {
if (first) rb_str_set_len(str, first = 0);
io_shift_cbuf(fptr, fptr->cbuf.len, &str);
}
v = fill_cbuf(fptr, 0);
if (v != MORE_CHAR_SUSPENDED && v != MORE_CHAR_FINISHED) {
if (fptr->cbuf.len) {
if (first) rb_str_set_len(str, first = 0);
io_shift_cbuf(fptr, fptr->cbuf.len, &str);
}
rb_exc_raise(v);
}
if (v == MORE_CHAR_FINISHED) {
clear_readconv(fptr);
if (first) rb_str_set_len(str, first = 0);
if (shrinkable) io_shrink_read_string(str, RSTRING_LEN(str));
return io_enc_str(str, fptr);
}
}
}
NEED_NEWLINE_DECORATOR_ON_READ_CHECK(fptr);
bytes = 0;
pos = 0;
enc = io_read_encoding(fptr);
cr = 0;
if (siz == 0) siz = BUFSIZ;
shrinkable = io_setstrbuf(&str, siz);
for (;;) {
READ_CHECK(fptr);
n = io_fread(str, bytes, siz - bytes, fptr);
if (n == 0 && bytes == 0) {
rb_str_set_len(str, 0);
break;
}
bytes += n;
rb_str_set_len(str, bytes);
if (cr != ENC_CODERANGE_BROKEN)
pos += rb_str_coderange_scan_restartable(RSTRING_PTR(str) + pos, RSTRING_PTR(str) + bytes, enc, &cr);
if (bytes < siz) break;
siz += BUFSIZ;
rb_str_modify_expand(str, BUFSIZ);
}
if (shrinkable) io_shrink_read_string(str, RSTRING_LEN(str));
str = io_enc_str(str, fptr);
ENC_CODERANGE_SET(str, cr);
return str;
}
void
rb_io_set_nonblock(rb_io_t *fptr)
{
#ifdef _WIN32
if (rb_w32_set_nonblock(fptr->fd) != 0) {
rb_sys_fail_path(fptr->pathv);
}
#else
int oflags;
#ifdef F_GETFL
oflags = fcntl(fptr->fd, F_GETFL);
if (oflags == -1) {
rb_sys_fail_path(fptr->pathv);
}
#else
oflags = 0;
#endif
if ((oflags & O_NONBLOCK) == 0) {
oflags |= O_NONBLOCK;
if (fcntl(fptr->fd, F_SETFL, oflags) == -1) {
rb_sys_fail_path(fptr->pathv);
}
}
#endif
}
struct read_internal_arg {
int fd;
char *str_ptr;
long len;
};
static VALUE
read_internal_call(VALUE arg)
{
struct read_internal_arg *p = (struct read_internal_arg *)arg;
p->len = rb_read_internal(p->fd, p->str_ptr, p->len);
return Qundef;
}
static int
no_exception_p(VALUE opts)
{
VALUE except;
ID id = id_exception;
rb_get_kwargs(opts, &id, 0, 1, &except);
return except == Qfalse;
}
static VALUE
io_getpartial(int argc, VALUE *argv, VALUE io, VALUE opts, int nonblock)
{
rb_io_t *fptr;
VALUE length, str;
long n, len;
struct read_internal_arg arg;
int shrinkable;
rb_scan_args(argc, argv, "11", &length, &str);
if ((len = NUM2LONG(length)) < 0) {
rb_raise(rb_eArgError, "negative length %ld given", len);
}
shrinkable = io_setstrbuf(&str, len);
OBJ_TAINT(str);
GetOpenFile(io, fptr);
rb_io_check_byte_readable(fptr);
if (len == 0)
return str;
if (!nonblock)
READ_CHECK(fptr);
n = read_buffered_data(RSTRING_PTR(str), len, fptr);
if (n <= 0) {
again:
if (nonblock) {
rb_io_set_nonblock(fptr);
}
io_setstrbuf(&str, len);
arg.fd = fptr->fd;
arg.str_ptr = RSTRING_PTR(str);
arg.len = len;
rb_str_locktmp_ensure(str, read_internal_call, (VALUE)&arg);
n = arg.len;
if (n < 0) {
int e = errno;
if (!nonblock && rb_io_wait_readable(fptr->fd))
goto again;
if (nonblock && (e == EWOULDBLOCK || e == EAGAIN)) {
if (no_exception_p(opts))
return sym_wait_readable;
else
rb_readwrite_syserr_fail(RB_IO_WAIT_READABLE,
e, "read would block");
}
rb_syserr_fail_path(e, fptr->pathv);
}
}
io_set_read_length(str, n, shrinkable);
if (n == 0)
return Qnil;
else
return str;
}
/*
* call-seq:
* ios.readpartial(maxlen) -> string
* ios.readpartial(maxlen, outbuf) -> outbuf
*
* Reads at most <i>maxlen</i> bytes from the I/O stream.
* It blocks only if <em>ios</em> has no data immediately available.
* It doesn't block if some data available.
*
* If the optional _outbuf_ argument is present,
* it must reference a String, which will receive the data.
* The _outbuf_ will contain only the received data after the method call
* even if it is not empty at the beginning.
*
* It raises <code>EOFError</code> on end of file.
*
* readpartial is designed for streams such as pipe, socket, tty, etc.
* It blocks only when no data immediately available.
* This means that it blocks only when following all conditions hold.
* * the byte buffer in the IO object is empty.
* * the content of the stream is empty.
* * the stream is not reached to EOF.
*
* When readpartial blocks, it waits data or EOF on the stream.
* If some data is reached, readpartial returns with the data.
* If EOF is reached, readpartial raises EOFError.
*
* When readpartial doesn't blocks, it returns or raises immediately.
* If the byte buffer is not empty, it returns the data in the buffer.
* Otherwise if the stream has some content,
* it returns the data in the stream.
* Otherwise if the stream is reached to EOF, it raises EOFError.
*
* r, w = IO.pipe # buffer pipe content
* w << "abc" # "" "abc".
* r.readpartial(4096) #=> "abc" "" ""
* r.readpartial(4096) # blocks because buffer and pipe is empty.
*
* r, w = IO.pipe # buffer pipe content
* w << "abc" # "" "abc"
* w.close # "" "abc" EOF
* r.readpartial(4096) #=> "abc" "" EOF
* r.readpartial(4096) # raises EOFError
*
* r, w = IO.pipe # buffer pipe content
* w << "abc\ndef\n" # "" "abc\ndef\n"
* r.gets #=> "abc\n" "def\n" ""
* w << "ghi\n" # "def\n" "ghi\n"
* r.readpartial(4096) #=> "def\n" "" "ghi\n"
* r.readpartial(4096) #=> "ghi\n" "" ""
*
* Note that readpartial behaves similar to sysread.
* The differences are:
* * If the byte buffer is not empty, read from the byte buffer instead of "sysread for buffered IO (IOError)".
* * It doesn't cause Errno::EWOULDBLOCK and Errno::EINTR. When readpartial meets EWOULDBLOCK and EINTR by read system call, readpartial retry the system call.
*
* The latter means that readpartial is nonblocking-flag insensitive.
* It blocks on the situation IO#sysread causes Errno::EWOULDBLOCK as if the fd is blocking mode.
*
*/
static VALUE
io_readpartial(int argc, VALUE *argv, VALUE io)
{
VALUE ret;
ret = io_getpartial(argc, argv, io, Qnil, 0);
if (NIL_P(ret))
rb_eof_error();
return ret;
}
static VALUE
io_nonblock_eof(VALUE opts)
{
if (!no_exception_p(opts)) {
rb_eof_error();
}
return Qnil;
}
/* :nodoc: */
static VALUE
io_read_nonblock(VALUE io, VALUE length, VALUE str, VALUE ex)
{
rb_io_t *fptr;
long n, len;
struct read_internal_arg arg;
int shrinkable;
if ((len = NUM2LONG(length)) < 0) {
rb_raise(rb_eArgError, "negative length %ld given", len);
}
shrinkable = io_setstrbuf(&str, len);
OBJ_TAINT(str);
GetOpenFile(io, fptr);
rb_io_check_byte_readable(fptr);
if (len == 0)
return str;
n = read_buffered_data(RSTRING_PTR(str), len, fptr);
if (n <= 0) {
rb_io_set_nonblock(fptr);
shrinkable |= io_setstrbuf(&str, len);
arg.fd = fptr->fd;
arg.str_ptr = RSTRING_PTR(str);
arg.len = len;
rb_str_locktmp_ensure(str, read_internal_call, (VALUE)&arg);
n = arg.len;
if (n < 0) {
int e = errno;
if ((e == EWOULDBLOCK || e == EAGAIN)) {
if (ex == Qfalse) return sym_wait_readable;
rb_readwrite_syserr_fail(RB_IO_WAIT_READABLE,
e, "read would block");
}
rb_syserr_fail_path(e, fptr->pathv);
}
}
io_set_read_length(str, n, shrinkable);
if (n == 0) {
if (ex == Qfalse) return Qnil;
rb_eof_error();
}
return str;
}
/* :nodoc: */
static VALUE
io_write_nonblock(VALUE io, VALUE str, VALUE ex)
{
rb_io_t *fptr;
long n;
if (!RB_TYPE_P(str, T_STRING))
str = rb_obj_as_string(str);
io = GetWriteIO(io);
GetOpenFile(io, fptr);
rb_io_check_writable(fptr);
if (io_fflush(fptr) < 0)
rb_sys_fail(0);
rb_io_set_nonblock(fptr);
n = write(fptr->fd, RSTRING_PTR(str), RSTRING_LEN(str));
if (n == -1) {
int e = errno;
if (e == EWOULDBLOCK || e == EAGAIN) {
if (ex == Qfalse) {
return sym_wait_writable;
}
else {
rb_readwrite_syserr_fail(RB_IO_WAIT_WRITABLE, e, "write would block");
}
}
rb_syserr_fail_path(e, fptr->pathv);
}
return LONG2FIX(n);
}
/*
* call-seq:
* ios.read([length [, outbuf]]) -> string, outbuf, or nil
*
* Reads _length_ bytes from the I/O stream.
*
* _length_ must be a non-negative integer or +nil+.
*
* If _length_ is a positive integer, +read+ tries to read
* _length_ bytes without any conversion (binary mode).
* It returns +nil+ if an EOF is encountered before anything can be read.
* Fewer than _length_ bytes are returned if an EOF is encountered during
* the read.
* In the case of an integer _length_, the resulting string is always
* in ASCII-8BIT encoding.
*
* If _length_ is omitted or is +nil+, it reads until EOF
* and the encoding conversion is applied, if applicable.
* A string is returned even if EOF is encountered before any data is read.
*
* If _length_ is zero, it returns an empty string (<code>""</code>).
*
* If the optional _outbuf_ argument is present,
* it must reference a String, which will receive the data.
* The _outbuf_ will contain only the received data after the method call
* even if it is not empty at the beginning.
*
* When this method is called at end of file, it returns +nil+
* or <code>""</code>, depending on _length_:
* +read+, <code>read(nil)</code>, and <code>read(0)</code> return
* <code>""</code>,
* <code>read(<i>positive_integer</i>)</code> returns +nil+.
*
* f = File.new("testfile")
* f.read(16) #=> "This is line one"
*
* # read whole file
* open("file") do |f|
* data = f.read # This returns a string even if the file is empty.
* # ...
* end
*
* # iterate over fixed length records
* open("fixed-record-file") do |f|
* while record = f.read(256)
* # ...
* end
* end
*
* # iterate over variable length records,
* # each record is prefixed by its 32-bit length
* open("variable-record-file") do |f|
* while len = f.read(4)
* len = len.unpack("N")[0] # 32-bit length
* record = f.read(len) # This returns a string even if len is 0.
* end
* end
*
* Note that this method behaves like the fread() function in C.
* This means it retries to invoke read(2) system calls to read data
* with the specified length (or until EOF).
* This behavior is preserved even if <i>ios</i> is in non-blocking mode.
* (This method is non-blocking flag insensitive as other methods.)
* If you need the behavior like a single read(2) system call,
* consider #readpartial, #read_nonblock, and #sysread.
*/
static VALUE
io_read(int argc, VALUE *argv, VALUE io)
{
rb_io_t *fptr;
long n, len;
VALUE length, str;
int shrinkable;
#if defined(RUBY_TEST_CRLF_ENVIRONMENT) || defined(_WIN32)
int previous_mode;
#endif
rb_scan_args(argc, argv, "02", &length, &str);
if (NIL_P(length)) {
GetOpenFile(io, fptr);
rb_io_check_char_readable(fptr);
return read_all(fptr, remain_size(fptr), str);
}
len = NUM2LONG(length);
if (len < 0) {
rb_raise(rb_eArgError, "negative length %ld given", len);
}
shrinkable = io_setstrbuf(&str,len);
GetOpenFile(io, fptr);
rb_io_check_byte_readable(fptr);
if (len == 0) {
io_set_read_length(str, 0, shrinkable);
return str;
}
READ_CHECK(fptr);
#if defined(RUBY_TEST_CRLF_ENVIRONMENT) || defined(_WIN32)
previous_mode = set_binary_mode_with_seek_cur(fptr);
#endif
n = io_fread(str, 0, len, fptr);
io_set_read_length(str, n, shrinkable);
#if defined(RUBY_TEST_CRLF_ENVIRONMENT) || defined(_WIN32)
if (previous_mode == O_TEXT) {
setmode(fptr->fd, O_TEXT);
}
#endif
if (n == 0) return Qnil;
OBJ_TAINT(str);
return str;
}
static void
rscheck(const char *rsptr, long rslen, VALUE rs)
{
if (!rs) return;
if (RSTRING_PTR(rs) != rsptr && RSTRING_LEN(rs) != rslen)
rb_raise(rb_eRuntimeError, "rs modified");
}
static int
appendline(rb_io_t *fptr, int delim, VALUE *strp, long *lp)
{
VALUE str = *strp;
long limit = *lp;
if (NEED_READCONV(fptr)) {
SET_BINARY_MODE(fptr);
make_readconv(fptr, 0);
do {
const char *p, *e;
int searchlen = READ_CHAR_PENDING_COUNT(fptr);
if (searchlen) {
p = READ_CHAR_PENDING_PTR(fptr);
if (0 < limit && limit < searchlen)
searchlen = (int)limit;
e = memchr(p, delim, searchlen);
if (e) {
int len = (int)(e-p+1);
if (NIL_P(str))
*strp = str = rb_str_new(p, len);
else
rb_str_buf_cat(str, p, len);
fptr->cbuf.off += len;
fptr->cbuf.len -= len;
limit -= len;
*lp = limit;
return delim;
}
if (NIL_P(str))
*strp = str = rb_str_new(p, searchlen);
else
rb_str_buf_cat(str, p, searchlen);
fptr->cbuf.off += searchlen;
fptr->cbuf.len -= searchlen;
limit -= searchlen;
if (limit == 0) {
*lp = limit;
return (unsigned char)RSTRING_PTR(str)[RSTRING_LEN(str)-1];
}
}
} while (more_char(fptr) != MORE_CHAR_FINISHED);
clear_readconv(fptr);
*lp = limit;
return EOF;
}
NEED_NEWLINE_DECORATOR_ON_READ_CHECK(fptr);
do {
long pending = READ_DATA_PENDING_COUNT(fptr);
if (pending > 0) {
const char *p = READ_DATA_PENDING_PTR(fptr);
const char *e;
long last;
if (limit > 0 && pending > limit) pending = limit;
e = memchr(p, delim, pending);
if (e) pending = e - p + 1;
if (!NIL_P(str)) {
last = RSTRING_LEN(str);
rb_str_resize(str, last + pending);
}
else {
last = 0;
*strp = str = rb_str_buf_new(pending);
rb_str_set_len(str, pending);
}
read_buffered_data(RSTRING_PTR(str) + last, pending, fptr); /* must not fail */
limit -= pending;
*lp = limit;
if (e) return delim;
if (limit == 0)
return (unsigned char)RSTRING_PTR(str)[RSTRING_LEN(str)-1];
}
READ_CHECK(fptr);
} while (io_fillbuf(fptr) >= 0);
*lp = limit;
return EOF;
}
static inline int
swallow(rb_io_t *fptr, int term)
{
if (NEED_READCONV(fptr)) {
rb_encoding *enc = io_read_encoding(fptr);
int needconv = rb_enc_mbminlen(enc) != 1;
SET_BINARY_MODE(fptr);
make_readconv(fptr, 0);
do {
size_t cnt;
while ((cnt = READ_CHAR_PENDING_COUNT(fptr)) > 0) {
const char *p = READ_CHAR_PENDING_PTR(fptr);
int i;
if (!needconv) {
if (*p != term) return TRUE;
i = (int)cnt;
while (--i && *++p == term);
}
else {
const char *e = p + cnt;
if (rb_enc_ascget(p, e, &i, enc) != term) return TRUE;
while ((p += i) < e && rb_enc_ascget(p, e, &i, enc) == term);
i = (int)(e - p);
}
io_shift_cbuf(fptr, (int)cnt - i, NULL);
}
} while (more_char(fptr) != MORE_CHAR_FINISHED);
return FALSE;
}
NEED_NEWLINE_DECORATOR_ON_READ_CHECK(fptr);
do {
size_t cnt;
while ((cnt = READ_DATA_PENDING_COUNT(fptr)) > 0) {
char buf[1024];
const char *p = READ_DATA_PENDING_PTR(fptr);
int i;
if (cnt > sizeof buf) cnt = sizeof buf;
if (*p != term) return TRUE;
i = (int)cnt;
while (--i && *++p == term);
if (!read_buffered_data(buf, cnt - i, fptr)) /* must not fail */
rb_sys_fail_path(fptr->pathv);
}
READ_CHECK(fptr);
} while (io_fillbuf(fptr) == 0);
return FALSE;
}
static VALUE
rb_io_getline_fast(rb_io_t *fptr, rb_encoding *enc, int chomp)
{
VALUE str = Qnil;
int len = 0;
long pos = 0;
int cr = 0;
do {
int pending = READ_DATA_PENDING_COUNT(fptr);
if (pending > 0) {
const char *p = READ_DATA_PENDING_PTR(fptr);
const char *e;
int chomplen = 0;
e = memchr(p, '\n', pending);
if (e) {
pending = (int)(e - p + 1);
if (chomp) {
chomplen = (pending > 1 && *(e-1) == '\r') + 1;
}
}
if (NIL_P(str)) {
str = rb_str_new(p, pending - chomplen);
fptr->rbuf.off += pending;
fptr->rbuf.len -= pending;
}
else {
rb_str_resize(str, len + pending - chomplen);
read_buffered_data(RSTRING_PTR(str)+len, pending - chomplen, fptr);
fptr->rbuf.off += chomplen;
fptr->rbuf.len -= chomplen;
}
len += pending - chomplen;
if (cr != ENC_CODERANGE_BROKEN)
pos += rb_str_coderange_scan_restartable(RSTRING_PTR(str) + pos, RSTRING_PTR(str) + len, enc, &cr);
if (e) break;
}
READ_CHECK(fptr);
} while (io_fillbuf(fptr) >= 0);
if (NIL_P(str)) return Qnil;
str = io_enc_str(str, fptr);
ENC_CODERANGE_SET(str, cr);
fptr->lineno++;
return str;
}
struct getline_arg {
VALUE io;
VALUE rs;
long limit;
unsigned int chomp: 1;
};
static void
extract_getline_opts(VALUE opts, struct getline_arg *args)
{
int chomp = FALSE;
if (!NIL_P(opts)) {
static ID kwds[1];
VALUE vchomp;
if (!kwds[0]) {
kwds[0] = rb_intern_const("chomp");
}
rb_get_kwargs(opts, kwds, 0, -2, &vchomp);
chomp = (vchomp != Qundef) && RTEST(vchomp);
}
args->chomp = chomp;
}
static void
extract_getline_args(int argc, VALUE *argv, struct getline_arg *args)
{
VALUE rs = rb_rs, lim = Qnil;
if (argc == 1) {
VALUE tmp = Qnil;
if (NIL_P(argv[0]) || !NIL_P(tmp = rb_check_string_type(argv[0]))) {
rs = tmp;
}
else {
lim = argv[0];
}
}
else if (2 <= argc) {
rs = argv[0], lim = argv[1];
if (!NIL_P(rs))
StringValue(rs);
}
args->rs = rs;
args->limit = NIL_P(lim) ? -1L : NUM2LONG(lim);
}
static void
check_getline_args(VALUE *rsp, long *limit, VALUE io)
{
rb_io_t *fptr;
VALUE rs = *rsp;
if (!NIL_P(rs)) {
rb_encoding *enc_rs, *enc_io;
GetOpenFile(io, fptr);
enc_rs = rb_enc_get(rs);
enc_io = io_read_encoding(fptr);
if (enc_io != enc_rs &&
(rb_enc_str_coderange(rs) != ENC_CODERANGE_7BIT ||
(RSTRING_LEN(rs) > 0 && !rb_enc_asciicompat(enc_io)))) {
if (rs == rb_default_rs) {
rs = rb_enc_str_new(0, 0, enc_io);
rb_str_buf_cat_ascii(rs, "\n");
*rsp = rs;
}
else {
rb_raise(rb_eArgError, "encoding mismatch: %s IO with %s RS",
rb_enc_name(enc_io),
rb_enc_name(enc_rs));
}
}
}
}
static void
prepare_getline_args(int argc, VALUE *argv, struct getline_arg *args, VALUE io)
{
VALUE opts;
argc = rb_scan_args(argc, argv, "02:", NULL, NULL, &opts);
extract_getline_args(argc, argv, args);
extract_getline_opts(opts, args);
check_getline_args(&args->rs, &args->limit, io);
}
static VALUE
rb_io_getline_0(VALUE rs, long limit, int chomp, rb_io_t *fptr)
{
VALUE str = Qnil;
int nolimit = 0;
rb_encoding *enc;
rb_io_check_char_readable(fptr);
if (NIL_P(rs) && limit < 0) {
str = read_all(fptr, 0, Qnil);
if (RSTRING_LEN(str) == 0) return Qnil;
if (chomp) rb_str_chomp_string(str, rb_default_rs);
}
else if (limit == 0) {
return rb_enc_str_new(0, 0, io_read_encoding(fptr));
}
else if (rs == rb_default_rs && limit < 0 && !NEED_READCONV(fptr) &&
rb_enc_asciicompat(enc = io_read_encoding(fptr))) {
NEED_NEWLINE_DECORATOR_ON_READ_CHECK(fptr);
return rb_io_getline_fast(fptr, enc, chomp);
}
else {
int c, newline = -1;
const char *rsptr = 0;
long rslen = 0;
int rspara = 0;
int extra_limit = 16;
int chomp_cr = chomp;
SET_BINARY_MODE(fptr);
enc = io_read_encoding(fptr);
if (!NIL_P(rs)) {
rslen = RSTRING_LEN(rs);
if (rslen == 0) {
rsptr = "\n\n";
rslen = 2;
rspara = 1;
swallow(fptr, '\n');
rs = 0;
if (!rb_enc_asciicompat(enc)) {
rs = rb_usascii_str_new(rsptr, rslen);
rs = rb_str_encode(rs, rb_enc_from_encoding(enc), 0, Qnil);
OBJ_FREEZE(rs);
rsptr = RSTRING_PTR(rs);
rslen = RSTRING_LEN(rs);
}
}
else {
rsptr = RSTRING_PTR(rs);
}
newline = (unsigned char)rsptr[rslen - 1];
chomp_cr = chomp && rslen == 1 && newline == '\n';
}
/* MS - Optimization */
while ((c = appendline(fptr, newline, &str, &limit)) != EOF) {
const char *s, *p, *pp, *e;
if (c == newline) {
if (RSTRING_LEN(str) < rslen) continue;
s = RSTRING_PTR(str);
e = RSTRING_END(str);
p = e - rslen;
pp = rb_enc_left_char_head(s, p, e, enc);
if (pp != p) continue;
if (!rspara) rscheck(rsptr, rslen, rs);
if (memcmp(p, rsptr, rslen) == 0) {
if (chomp) {
if (chomp_cr && p > s && *(p-1) == '\r') --p;
rb_str_set_len(str, p - s);
}
break;
}
}
if (limit == 0) {
s = RSTRING_PTR(str);
p = RSTRING_END(str);
pp = rb_enc_left_char_head(s, p-1, p, enc);
if (extra_limit &&
MBCLEN_NEEDMORE_P(rb_enc_precise_mbclen(pp, p, enc))) {
/* relax the limit while incomplete character.
* extra_limit limits the relax length */
limit = 1;
extra_limit--;
}
else {
nolimit = 1;
break;
}
}
}
if (rspara && c != EOF)
swallow(fptr, '\n');
if (!NIL_P(str))
str = io_enc_str(str, fptr);
}
if (!NIL_P(str) && !nolimit) {
fptr->lineno++;
}
return str;
}
static VALUE
rb_io_getline_1(VALUE rs, long limit, int chomp, VALUE io)
{
rb_io_t *fptr;
int old_lineno, new_lineno;
VALUE str;
GetOpenFile(io, fptr);
old_lineno = fptr->lineno;
str = rb_io_getline_0(rs, limit, chomp, fptr);
if (!NIL_P(str) && (new_lineno = fptr->lineno) != old_lineno) {
if (io == ARGF.current_file) {
ARGF.lineno += new_lineno - old_lineno;
ARGF.last_lineno = ARGF.lineno;
}
else {
ARGF.last_lineno = new_lineno;
}
}
return str;
}
static VALUE
rb_io_getline(int argc, VALUE *argv, VALUE io)
{
struct getline_arg args;
prepare_getline_args(argc, argv, &args, io);
return rb_io_getline_1(args.rs, args.limit, args.chomp, io);
}
VALUE
rb_io_gets(VALUE io)
{
return rb_io_getline_1(rb_default_rs, -1, FALSE, io);
}
VALUE
rb_io_gets_internal(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
return rb_io_getline_0(rb_default_rs, -1, FALSE, fptr);
}
/*
* call-seq:
* ios.gets(sep=$/ [, getline_args]) -> string or nil
* ios.gets(limit [, getline_args]) -> string or nil
* ios.gets(sep, limit [, getline_args]) -> string or nil
*
* Reads the next ``line'' from the I/O stream; lines are separated by
* <i>sep</i>. A separator of +nil+ reads the entire
* contents, and a zero-length separator reads the input a paragraph at
* a time (two successive newlines in the input separate paragraphs).
* The stream must be opened for reading or an <code>IOError</code>
* will be raised. The line read in will be returned and also assigned
* to <code>$_</code>. Returns +nil+ if called at end of
* file. If the first argument is an integer, or optional second
* argument is given, the returning string would not be longer than the
* given value in bytes.
*
* File.new("testfile").gets #=> "This is line one\n"
* $_ #=> "This is line one\n"
*
* File.new("testfile").gets(4)#=> "This"
*
* If IO contains multibyte characters byte then <code>gets(1)</code>
* returns character entirely:
*
* # Russian characters take 2 bytes
* File.write("testfile", "\u{442 435 441 442}")
* File.open("testfile") {|f|f.gets(1)} #=> "\u0442"
* File.open("testfile") {|f|f.gets(2)} #=> "\u0442"
* File.open("testfile") {|f|f.gets(3)} #=> "\u0442\u0435"
* File.open("testfile") {|f|f.gets(4)} #=> "\u0442\u0435"
*/
static VALUE
rb_io_gets_m(int argc, VALUE *argv, VALUE io)
{
VALUE str;
str = rb_io_getline(argc, argv, io);
rb_lastline_set(str);
return str;
}
/*
* call-seq:
* ios.lineno -> integer
*
* Returns the current line number in <em>ios</em>. The stream must be
* opened for reading. <code>lineno</code> counts the number of times
* #gets is called rather than the number of newlines encountered. The two
* values will differ if #gets is called with a separator other than newline.
*
* Methods that use <code>$/</code> like #each, #lines and #readline will
* also increment <code>lineno</code>.
*
* See also the <code>$.</code> variable.
*
* f = File.new("testfile")
* f.lineno #=> 0
* f.gets #=> "This is line one\n"
* f.lineno #=> 1
* f.gets #=> "This is line two\n"
* f.lineno #=> 2
*/
static VALUE
rb_io_lineno(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_char_readable(fptr);
return INT2NUM(fptr->lineno);
}
/*
* call-seq:
* ios.lineno = integer -> integer
*
* Manually sets the current line number to the given value.
* <code>$.</code> is updated only on the next read.
*
* f = File.new("testfile")
* f.gets #=> "This is line one\n"
* $. #=> 1
* f.lineno = 1000
* f.lineno #=> 1000
* $. #=> 1 # lineno of last read
* f.gets #=> "This is line two\n"
* $. #=> 1001 # lineno of last read
*/
static VALUE
rb_io_set_lineno(VALUE io, VALUE lineno)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_char_readable(fptr);
fptr->lineno = NUM2INT(lineno);
return lineno;
}
/*
* call-seq:
* ios.readline(sep=$/ [, getline_args]) -> string
* ios.readline(limit [, getline_args]) -> string
* ios.readline(sep, limit [, getline_args]) -> string
*
* Reads a line as with <code>IO#gets</code>, but raises an
* <code>EOFError</code> on end of file.
*/
static VALUE
rb_io_readline(int argc, VALUE *argv, VALUE io)
{
VALUE line = rb_io_gets_m(argc, argv, io);
if (NIL_P(line)) {
rb_eof_error();
}
return line;
}
static VALUE io_readlines(const struct getline_arg *arg, VALUE io);
/*
* call-seq:
* ios.readlines(sep=$/ [, getline_args]) -> array
* ios.readlines(limit [, getline_args]) -> array
* ios.readlines(sep, limit [, getline_args]) -> array
*
* Reads all of the lines in <em>ios</em>, and returns them in
* an array. Lines are separated by the optional <i>sep</i>. If
* <i>sep</i> is +nil+, the rest of the stream is returned
* as a single record.
* If the first argument is an integer, or an
* optional second argument is given, the returning string would not be
* longer than the given value in bytes. The stream must be opened for
* reading or an <code>IOError</code> will be raised.
*
* f = File.new("testfile")
* f.readlines[0] #=> "This is line one\n"
*
* f = File.new("testfile", chomp: true)
* f.readlines[0] #=> "This is line one"
*
* See IO.readlines for details about getline_args.
*/
static VALUE
rb_io_readlines(int argc, VALUE *argv, VALUE io)
{
struct getline_arg args;
prepare_getline_args(argc, argv, &args, io);
return io_readlines(&args, io);
}
static VALUE
io_readlines(const struct getline_arg *arg, VALUE io)
{
VALUE line, ary;
if (arg->limit == 0)
rb_raise(rb_eArgError, "invalid limit: 0 for readlines");
ary = rb_ary_new();
while (!NIL_P(line = rb_io_getline_1(arg->rs, arg->limit, arg->chomp, io))) {
rb_ary_push(ary, line);
}
return ary;
}
/*
* call-seq:
* ios.each(sep=$/ [, getline_args]) {|line| block } -> ios
* ios.each(limit [, getline_args]) {|line| block } -> ios
* ios.each(sep, limit [, getline_args]) {|line| block } -> ios
* ios.each(...) -> an_enumerator
*
* ios.each_line(sep=$/ [, getline_args]) {|line| block } -> ios
* ios.each_line(limit [, getline_args]) {|line| block } -> ios
* ios.each_line(sep, limit [, getline_args]) {|line| block } -> ios
* ios.each_line(...) -> an_enumerator
*
* Executes the block for every line in <em>ios</em>, where lines are
* separated by <i>sep</i>. <em>ios</em> must be opened for
* reading or an <code>IOError</code> will be raised.
*
* If no block is given, an enumerator is returned instead.
*
* f = File.new("testfile")
* f.each {|line| puts "#{f.lineno}: #{line}" }
*
* <em>produces:</em>
*
* 1: This is line one
* 2: This is line two
* 3: This is line three
* 4: And so on...
*
* See IO.readlines for details about getline_args.
*/
static VALUE
rb_io_each_line(int argc, VALUE *argv, VALUE io)
{
VALUE str;
struct getline_arg args;
RETURN_ENUMERATOR(io, argc, argv);
prepare_getline_args(argc, argv, &args, io);
if (args.limit == 0)
rb_raise(rb_eArgError, "invalid limit: 0 for each_line");
while (!NIL_P(str = rb_io_getline_1(args.rs, args.limit, args.chomp, io))) {
rb_yield(str);
}
return io;
}
/*
* This is a deprecated alias for <code>each_line</code>.
*/
static VALUE
rb_io_lines(int argc, VALUE *argv, VALUE io)
{
rb_warn("IO#lines is deprecated; use #each_line instead");
if (!rb_block_given_p())
return rb_enumeratorize(io, ID2SYM(rb_intern("each_line")), argc, argv);
return rb_io_each_line(argc, argv, io);
}
/*
* call-seq:
* ios.each_byte {|byte| block } -> ios
* ios.each_byte -> an_enumerator
*
* Calls the given block once for each byte (0..255) in <em>ios</em>,
* passing the byte as an argument. The stream must be opened for
* reading or an <code>IOError</code> will be raised.
*
* If no block is given, an enumerator is returned instead.
*
* f = File.new("testfile")
* checksum = 0
* f.each_byte {|x| checksum ^= x } #=> #<File:testfile>
* checksum #=> 12
*/
static VALUE
rb_io_each_byte(VALUE io)
{
rb_io_t *fptr;
RETURN_ENUMERATOR(io, 0, 0);
GetOpenFile(io, fptr);
do {
while (fptr->rbuf.len > 0) {
char *p = fptr->rbuf.ptr + fptr->rbuf.off++;
fptr->rbuf.len--;
rb_yield(INT2FIX(*p & 0xff));
errno = 0;
}
rb_io_check_byte_readable(fptr);
READ_CHECK(fptr);
} while (io_fillbuf(fptr) >= 0);
return io;
}
/*
* This is a deprecated alias for <code>each_byte</code>.
*/
static VALUE
rb_io_bytes(VALUE io)
{
rb_warn("IO#bytes is deprecated; use #each_byte instead");
if (!rb_block_given_p())
return rb_enumeratorize(io, ID2SYM(rb_intern("each_byte")), 0, 0);
return rb_io_each_byte(io);
}
static VALUE
io_getc(rb_io_t *fptr, rb_encoding *enc)
{
int r, n, cr = 0;
VALUE str;
if (NEED_READCONV(fptr)) {
rb_encoding *read_enc = io_read_encoding(fptr);
str = Qnil;
SET_BINARY_MODE(fptr);
make_readconv(fptr, 0);
while (1) {
if (fptr->cbuf.len) {
r = rb_enc_precise_mbclen(fptr->cbuf.ptr+fptr->cbuf.off,
fptr->cbuf.ptr+fptr->cbuf.off+fptr->cbuf.len,
read_enc);
if (!MBCLEN_NEEDMORE_P(r))
break;
if (fptr->cbuf.len == fptr->cbuf.capa) {
rb_raise(rb_eIOError, "too long character");
}
}
if (more_char(fptr) == MORE_CHAR_FINISHED) {
if (fptr->cbuf.len == 0) {
clear_readconv(fptr);
return Qnil;
}
/* return an unit of an incomplete character just before EOF */
str = rb_enc_str_new(fptr->cbuf.ptr+fptr->cbuf.off, 1, read_enc);
fptr->cbuf.off += 1;
fptr->cbuf.len -= 1;
if (fptr->cbuf.len == 0) clear_readconv(fptr);
ENC_CODERANGE_SET(str, ENC_CODERANGE_BROKEN);
return str;
}
}
if (MBCLEN_INVALID_P(r)) {
r = rb_enc_mbclen(fptr->cbuf.ptr+fptr->cbuf.off,
fptr->cbuf.ptr+fptr->cbuf.off+fptr->cbuf.len,
read_enc);
io_shift_cbuf(fptr, r, &str);
cr = ENC_CODERANGE_BROKEN;
}
else {
io_shift_cbuf(fptr, MBCLEN_CHARFOUND_LEN(r), &str);
cr = ENC_CODERANGE_VALID;
if (MBCLEN_CHARFOUND_LEN(r) == 1 && rb_enc_asciicompat(read_enc) &&
ISASCII(RSTRING_PTR(str)[0])) {
cr = ENC_CODERANGE_7BIT;
}
}
str = io_enc_str(str, fptr);
ENC_CODERANGE_SET(str, cr);
return str;
}
NEED_NEWLINE_DECORATOR_ON_READ_CHECK(fptr);
if (io_fillbuf(fptr) < 0) {
return Qnil;
}
if (rb_enc_asciicompat(enc) && ISASCII(fptr->rbuf.ptr[fptr->rbuf.off])) {
str = rb_str_new(fptr->rbuf.ptr+fptr->rbuf.off, 1);
fptr->rbuf.off += 1;
fptr->rbuf.len -= 1;
cr = ENC_CODERANGE_7BIT;
}
else {
r = rb_enc_precise_mbclen(fptr->rbuf.ptr+fptr->rbuf.off, fptr->rbuf.ptr+fptr->rbuf.off+fptr->rbuf.len, enc);
if (MBCLEN_CHARFOUND_P(r) &&
(n = MBCLEN_CHARFOUND_LEN(r)) <= fptr->rbuf.len) {
str = rb_str_new(fptr->rbuf.ptr+fptr->rbuf.off, n);
fptr->rbuf.off += n;
fptr->rbuf.len -= n;
cr = ENC_CODERANGE_VALID;
}
else if (MBCLEN_NEEDMORE_P(r)) {
str = rb_str_new(fptr->rbuf.ptr+fptr->rbuf.off, fptr->rbuf.len);
fptr->rbuf.len = 0;
getc_needmore:
if (io_fillbuf(fptr) != -1) {
rb_str_cat(str, fptr->rbuf.ptr+fptr->rbuf.off, 1);
fptr->rbuf.off++;
fptr->rbuf.len--;
r = rb_enc_precise_mbclen(RSTRING_PTR(str), RSTRING_PTR(str)+RSTRING_LEN(str), enc);
if (MBCLEN_NEEDMORE_P(r)) {
goto getc_needmore;
}
else if (MBCLEN_CHARFOUND_P(r)) {
cr = ENC_CODERANGE_VALID;
}
}
}
else {
str = rb_str_new(fptr->rbuf.ptr+fptr->rbuf.off, 1);
fptr->rbuf.off++;
fptr->rbuf.len--;
}
}
if (!cr) cr = ENC_CODERANGE_BROKEN;
str = io_enc_str(str, fptr);
ENC_CODERANGE_SET(str, cr);
return str;
}
/*
* call-seq:
* ios.each_char {|c| block } -> ios
* ios.each_char -> an_enumerator
*
* Calls the given block once for each character in <em>ios</em>,
* passing the character as an argument. The stream must be opened for
* reading or an <code>IOError</code> will be raised.
*
* If no block is given, an enumerator is returned instead.
*
* f = File.new("testfile")
* f.each_char {|c| print c, ' ' } #=> #<File:testfile>
*/
static VALUE
rb_io_each_char(VALUE io)
{
rb_io_t *fptr;
rb_encoding *enc;
VALUE c;
RETURN_ENUMERATOR(io, 0, 0);
GetOpenFile(io, fptr);
rb_io_check_char_readable(fptr);
enc = io_input_encoding(fptr);
READ_CHECK(fptr);
while (!NIL_P(c = io_getc(fptr, enc))) {
rb_yield(c);
}
return io;
}
/*
* This is a deprecated alias for <code>each_char</code>.
*/
static VALUE
rb_io_chars(VALUE io)
{
rb_warn("IO#chars is deprecated; use #each_char instead");
if (!rb_block_given_p())
return rb_enumeratorize(io, ID2SYM(rb_intern("each_char")), 0, 0);
return rb_io_each_char(io);
}
/*
* call-seq:
* ios.each_codepoint {|c| block } -> ios
* ios.codepoints {|c| block } -> ios
* ios.each_codepoint -> an_enumerator
* ios.codepoints -> an_enumerator
*
* Passes the <code>Integer</code> ordinal of each character in <i>ios</i>,
* passing the codepoint as an argument. The stream must be opened for
* reading or an <code>IOError</code> will be raised.
*
* If no block is given, an enumerator is returned instead.
*
*/
static VALUE
rb_io_each_codepoint(VALUE io)
{
rb_io_t *fptr;
rb_encoding *enc;
unsigned int c;
int r, n;
RETURN_ENUMERATOR(io, 0, 0);
GetOpenFile(io, fptr);
rb_io_check_char_readable(fptr);
READ_CHECK(fptr);
if (NEED_READCONV(fptr)) {
SET_BINARY_MODE(fptr);
r = 1; /* no invalid char yet */
for (;;) {
make_readconv(fptr, 0);
for (;;) {
if (fptr->cbuf.len) {
if (fptr->encs.enc)
r = rb_enc_precise_mbclen(fptr->cbuf.ptr+fptr->cbuf.off,
fptr->cbuf.ptr+fptr->cbuf.off+fptr->cbuf.len,
fptr->encs.enc);
else
r = ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(1);
if (!MBCLEN_NEEDMORE_P(r))
break;
if (fptr->cbuf.len == fptr->cbuf.capa) {
rb_raise(rb_eIOError, "too long character");
}
}
if (more_char(fptr) == MORE_CHAR_FINISHED) {
clear_readconv(fptr);
if (!MBCLEN_CHARFOUND_P(r)) {
enc = fptr->encs.enc;
goto invalid;
}
return io;
}
}
if (MBCLEN_INVALID_P(r)) {
enc = fptr->encs.enc;
goto invalid;
}
n = MBCLEN_CHARFOUND_LEN(r);
if (fptr->encs.enc) {
c = rb_enc_codepoint(fptr->cbuf.ptr+fptr->cbuf.off,
fptr->cbuf.ptr+fptr->cbuf.off+fptr->cbuf.len,
fptr->encs.enc);
}
else {
c = (unsigned char)fptr->cbuf.ptr[fptr->cbuf.off];
}
fptr->cbuf.off += n;
fptr->cbuf.len -= n;
rb_yield(UINT2NUM(c));
}
}
NEED_NEWLINE_DECORATOR_ON_READ_CHECK(fptr);
enc = io_input_encoding(fptr);
while (io_fillbuf(fptr) >= 0) {
r = rb_enc_precise_mbclen(fptr->rbuf.ptr+fptr->rbuf.off,
fptr->rbuf.ptr+fptr->rbuf.off+fptr->rbuf.len, enc);
if (MBCLEN_CHARFOUND_P(r) &&
(n = MBCLEN_CHARFOUND_LEN(r)) <= fptr->rbuf.len) {
c = rb_enc_codepoint(fptr->rbuf.ptr+fptr->rbuf.off,
fptr->rbuf.ptr+fptr->rbuf.off+fptr->rbuf.len, enc);
fptr->rbuf.off += n;
fptr->rbuf.len -= n;
rb_yield(UINT2NUM(c));
}
else if (MBCLEN_INVALID_P(r)) {
invalid:
rb_raise(rb_eArgError, "invalid byte sequence in %s", rb_enc_name(enc));
}
else if (MBCLEN_NEEDMORE_P(r)) {
char cbuf[8], *p = cbuf;
int more = MBCLEN_NEEDMORE_LEN(r);
if (more > numberof(cbuf)) goto invalid;
more += n = fptr->rbuf.len;
if (more > numberof(cbuf)) goto invalid;
while ((n = (int)read_buffered_data(p, more, fptr)) > 0 &&
(p += n, (more -= n) > 0)) {
if (io_fillbuf(fptr) < 0) goto invalid;
if ((n = fptr->rbuf.len) > more) n = more;
}
r = rb_enc_precise_mbclen(cbuf, p, enc);
if (!MBCLEN_CHARFOUND_P(r)) goto invalid;
c = rb_enc_codepoint(cbuf, p, enc);
rb_yield(UINT2NUM(c));
}
else {
continue;
}
}
return io;
}
/*
* This is a deprecated alias for <code>each_codepoint</code>.
*/
static VALUE
rb_io_codepoints(VALUE io)
{
rb_warn("IO#codepoints is deprecated; use #each_codepoint instead");
if (!rb_block_given_p())
return rb_enumeratorize(io, ID2SYM(rb_intern("each_codepoint")), 0, 0);
return rb_io_each_codepoint(io);
}
/*
* call-seq:
* ios.getc -> string or nil
*
* Reads a one-character string from <em>ios</em>. Returns
* +nil+ if called at end of file.
*
* f = File.new("testfile")
* f.getc #=> "h"
* f.getc #=> "e"
*/
static VALUE
rb_io_getc(VALUE io)
{
rb_io_t *fptr;
rb_encoding *enc;
GetOpenFile(io, fptr);
rb_io_check_char_readable(fptr);
enc = io_input_encoding(fptr);
READ_CHECK(fptr);
return io_getc(fptr, enc);
}
/*
* call-seq:
* ios.readchar -> string
*
* Reads a one-character string from <em>ios</em>. Raises an
* <code>EOFError</code> on end of file.
*
* f = File.new("testfile")
* f.readchar #=> "h"
* f.readchar #=> "e"
*/
static VALUE
rb_io_readchar(VALUE io)
{
VALUE c = rb_io_getc(io);
if (NIL_P(c)) {
rb_eof_error();
}
return c;
}
/*
* call-seq:
* ios.getbyte -> integer or nil
*
* Gets the next 8-bit byte (0..255) from <em>ios</em>. Returns
* +nil+ if called at end of file.
*
* f = File.new("testfile")
* f.getbyte #=> 84
* f.getbyte #=> 104
*/
VALUE
rb_io_getbyte(VALUE io)
{
rb_io_t *fptr;
int c;
GetOpenFile(io, fptr);
rb_io_check_byte_readable(fptr);
READ_CHECK(fptr);
if (fptr->fd == 0 && (fptr->mode & FMODE_TTY) && RB_TYPE_P(rb_stdout, T_FILE)) {
rb_io_t *ofp;
GetOpenFile(rb_stdout, ofp);
if (ofp->mode & FMODE_TTY) {
rb_io_flush(rb_stdout);
}
}
if (io_fillbuf(fptr) < 0) {
return Qnil;
}
fptr->rbuf.off++;
fptr->rbuf.len--;
c = (unsigned char)fptr->rbuf.ptr[fptr->rbuf.off-1];
return INT2FIX(c & 0xff);
}
/*
* call-seq:
* ios.readbyte -> integer
*
* Reads a byte as with <code>IO#getbyte</code>, but raises an
* <code>EOFError</code> on end of file.
*/
static VALUE
rb_io_readbyte(VALUE io)
{
VALUE c = rb_io_getbyte(io);
if (NIL_P(c)) {
rb_eof_error();
}
return c;
}
/*
* call-seq:
* ios.ungetbyte(string) -> nil
* ios.ungetbyte(integer) -> nil
*
* Pushes back bytes (passed as a parameter) onto <em>ios</em>,
* such that a subsequent buffered read will return it. Only one byte
* may be pushed back before a subsequent read operation (that is,
* you will be able to read only the last of several bytes that have been pushed
* back). Has no effect with unbuffered reads (such as <code>IO#sysread</code>).
*
* f = File.new("testfile") #=> #<File:testfile>
* b = f.getbyte #=> 0x38
* f.ungetbyte(b) #=> nil
* f.getbyte #=> 0x38
*/
VALUE
rb_io_ungetbyte(VALUE io, VALUE b)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
rb_io_check_byte_readable(fptr);
if (NIL_P(b)) return Qnil;
if (FIXNUM_P(b)) {
char cc = FIX2INT(b);
b = rb_str_new(&cc, 1);
}
else {
SafeStringValue(b);
}
io_ungetbyte(b, fptr);
return Qnil;
}
/*
* call-seq:
* ios.ungetc(string) -> nil
*
* Pushes back one character (passed as a parameter) onto <em>ios</em>,
* such that a subsequent buffered character read will return it. Only one character
* may be pushed back before a subsequent read operation (that is,
* you will be able to read only the last of several characters that have been pushed
* back). Has no effect with unbuffered reads (such as <code>IO#sysread</code>).
*
* f = File.new("testfile") #=> #<File:testfile>
* c = f.getc #=> "8"
* f.ungetc(c) #=> nil
* f.getc #=> "8"
*/
VALUE
rb_io_ungetc(VALUE io, VALUE c)
{
rb_io_t *fptr;
long len;
GetOpenFile(io, fptr);
rb_io_check_char_readable(fptr);
if (NIL_P(c)) return Qnil;
if (FIXNUM_P(c)) {
c = rb_enc_uint_chr(FIX2UINT(c), io_read_encoding(fptr));
}
else if (RB_TYPE_P(c, T_BIGNUM)) {
c = rb_enc_uint_chr(NUM2UINT(c), io_read_encoding(fptr));
}
else {
SafeStringValue(c);
}
if (NEED_READCONV(fptr)) {
SET_BINARY_MODE(fptr);
len = RSTRING_LEN(c);
#if SIZEOF_LONG > SIZEOF_INT
if (len > INT_MAX)
rb_raise(rb_eIOError, "ungetc failed");
#endif
make_readconv(fptr, (int)len);
if (fptr->cbuf.capa - fptr->cbuf.len < len)
rb_raise(rb_eIOError, "ungetc failed");
if (fptr->cbuf.off < len) {
MEMMOVE(fptr->cbuf.ptr+fptr->cbuf.capa-fptr->cbuf.len,
fptr->cbuf.ptr+fptr->cbuf.off,
char, fptr->cbuf.len);
fptr->cbuf.off = fptr->cbuf.capa-fptr->cbuf.len;
}
fptr->cbuf.off -= (int)len;
fptr->cbuf.len += (int)len;
MEMMOVE(fptr->cbuf.ptr+fptr->cbuf.off, RSTRING_PTR(c), char, len);
}
else {
NEED_NEWLINE_DECORATOR_ON_READ_CHECK(fptr);
io_ungetbyte(c, fptr);
}
return Qnil;
}
/*
* call-seq:
* ios.isatty -> true or false
* ios.tty? -> true or false
*
* Returns <code>true</code> if <em>ios</em> is associated with a
* terminal device (tty), <code>false</code> otherwise.
*
* File.new("testfile").isatty #=> false
* File.new("/dev/tty").isatty #=> true
*/
static VALUE
rb_io_isatty(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (isatty(fptr->fd) == 0)
return Qfalse;
return Qtrue;
}
#if defined(HAVE_FCNTL) && defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)
/*
* call-seq:
* ios.close_on_exec? -> true or false
*
* Returns <code>true</code> if <em>ios</em> will be closed on exec.
*
* f = open("/dev/null")
* f.close_on_exec? #=> false
* f.close_on_exec = true
* f.close_on_exec? #=> true
* f.close_on_exec = false
* f.close_on_exec? #=> false
*/
static VALUE
rb_io_close_on_exec_p(VALUE io)
{
rb_io_t *fptr;
VALUE write_io;
int fd, ret;
write_io = GetWriteIO(io);
if (io != write_io) {
GetOpenFile(write_io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fd, F_GETFD)) == -1) rb_sys_fail_path(fptr->pathv);
if (!(ret & FD_CLOEXEC)) return Qfalse;
}
}
GetOpenFile(io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fd, F_GETFD)) == -1) rb_sys_fail_path(fptr->pathv);
if (!(ret & FD_CLOEXEC)) return Qfalse;
}
return Qtrue;
}
#else
#define rb_io_close_on_exec_p rb_f_notimplement
#endif
#if defined(HAVE_FCNTL) && defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)
/*
* call-seq:
* ios.close_on_exec = bool -> true or false
*
* Sets a close-on-exec flag.
*
* f = open("/dev/null")
* f.close_on_exec = true
* system("cat", "/proc/self/fd/#{f.fileno}") # cat: /proc/self/fd/3: No such file or directory
* f.closed? #=> false
*
* Ruby sets close-on-exec flags of all file descriptors by default
* since Ruby 2.0.0.
* So you don't need to set by yourself.
* Also, unsetting a close-on-exec flag can cause file descriptor leak
* if another thread use fork() and exec() (via system() method for example).
* If you really needs file descriptor inheritance to child process,
* use spawn()'s argument such as fd=>fd.
*/
static VALUE
rb_io_set_close_on_exec(VALUE io, VALUE arg)
{
int flag = RTEST(arg) ? FD_CLOEXEC : 0;
rb_io_t *fptr;
VALUE write_io;
int fd, ret;
write_io = GetWriteIO(io);
if (io != write_io) {
GetOpenFile(write_io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fptr->fd, F_GETFD)) == -1) rb_sys_fail_path(fptr->pathv);
if ((ret & FD_CLOEXEC) != flag) {
ret = (ret & ~FD_CLOEXEC) | flag;
ret = fcntl(fd, F_SETFD, ret);
if (ret == -1) rb_sys_fail_path(fptr->pathv);
}
}
}
GetOpenFile(io, fptr);
if (fptr && 0 <= (fd = fptr->fd)) {
if ((ret = fcntl(fd, F_GETFD)) == -1) rb_sys_fail_path(fptr->pathv);
if ((ret & FD_CLOEXEC) != flag) {
ret = (ret & ~FD_CLOEXEC) | flag;
ret = fcntl(fd, F_SETFD, ret);
if (ret == -1) rb_sys_fail_path(fptr->pathv);
}
}
return Qnil;
}
#else
#define rb_io_set_close_on_exec rb_f_notimplement
#endif
#define FMODE_PREP (1<<16)
#define IS_PREP_STDIO(f) ((f)->mode & FMODE_PREP)
#define PREP_STDIO_NAME(f) (RSTRING_PTR((f)->pathv))
static VALUE
finish_writeconv(rb_io_t *fptr, int noalloc)
{
unsigned char *ds, *dp, *de;
rb_econv_result_t res;
if (!fptr->wbuf.ptr) {
unsigned char buf[1024];
long r;
res = econv_destination_buffer_full;
while (res == econv_destination_buffer_full) {
ds = dp = buf;
de = buf + sizeof(buf);
res = rb_econv_convert(fptr->writeconv, NULL, NULL, &dp, de, 0);
while (dp-ds) {
retry:
if (fptr->write_lock && rb_mutex_owned_p(fptr->write_lock))
r = rb_write_internal2(fptr->fd, ds, dp-ds);
else
r = rb_write_internal(fptr->fd, ds, dp-ds);
if (r == dp-ds)
break;
if (0 <= r) {
ds += r;
}
if (rb_io_wait_writable(fptr->fd)) {
if (fptr->fd < 0)
return noalloc ? Qtrue : rb_exc_new3(rb_eIOError, rb_str_new_cstr(closed_stream));
goto retry;
}
return noalloc ? Qtrue : INT2NUM(errno);
}
if (res == econv_invalid_byte_sequence ||
res == econv_incomplete_input ||
res == econv_undefined_conversion) {
return noalloc ? Qtrue : rb_econv_make_exception(fptr->writeconv);
}
}
return Qnil;
}
res = econv_destination_buffer_full;
while (res == econv_destination_buffer_full) {
if (fptr->wbuf.len == fptr->wbuf.capa) {
if (io_fflush(fptr) < 0)
return noalloc ? Qtrue : INT2NUM(errno);
}
ds = dp = (unsigned char *)fptr->wbuf.ptr + fptr->wbuf.off + fptr->wbuf.len;
de = (unsigned char *)fptr->wbuf.ptr + fptr->wbuf.capa;
res = rb_econv_convert(fptr->writeconv, NULL, NULL, &dp, de, 0);
fptr->wbuf.len += (int)(dp - ds);
if (res == econv_invalid_byte_sequence ||
res == econv_incomplete_input ||
res == econv_undefined_conversion) {
return noalloc ? Qtrue : rb_econv_make_exception(fptr->writeconv);
}
}
return Qnil;
}
struct finish_writeconv_arg {
rb_io_t *fptr;
int noalloc;
};
static VALUE
finish_writeconv_sync(VALUE arg)
{
struct finish_writeconv_arg *p = (struct finish_writeconv_arg *)arg;
return finish_writeconv(p->fptr, p->noalloc);
}
static void*
nogvl_close(void *ptr)
{
int *fd = ptr;
return (void*)(intptr_t)close(*fd);
}
static int
maygvl_close(int fd, int keepgvl)
{
if (keepgvl)
return close(fd);
/*
* close() may block for certain file types (NFS, SO_LINGER sockets,
* inotify), so let other threads run.
*/
return (int)(intptr_t)rb_thread_call_without_gvl(nogvl_close, &fd, RUBY_UBF_IO, 0);
}
static void*
nogvl_fclose(void *ptr)
{
FILE *file = ptr;
return (void*)(intptr_t)fclose(file);
}
static int
maygvl_fclose(FILE *file, int keepgvl)
{
if (keepgvl)
return fclose(file);
return (int)(intptr_t)rb_thread_call_without_gvl(nogvl_fclose, file, RUBY_UBF_IO, 0);
}
static void free_io_buffer(rb_io_buffer_t *buf);
static void clear_codeconv(rb_io_t *fptr);
static void
fptr_finalize_flush(rb_io_t *fptr, int noraise, int keepgvl)
{
VALUE err = Qnil;
int fd = fptr->fd;
FILE *stdio_file = fptr->stdio_file;
int mode = fptr->mode;
if (fptr->writeconv) {
if (fptr->write_lock && !noraise) {
struct finish_writeconv_arg arg;
arg.fptr = fptr;
arg.noalloc = noraise;
err = rb_mutex_synchronize(fptr->write_lock, finish_writeconv_sync, (VALUE)&arg);
}
else {
err = finish_writeconv(fptr, noraise);
}
}
if (fptr->wbuf.len) {
if (noraise) {
if ((int)io_flush_buffer_sync(fptr) < 0 && NIL_P(err))
err = Qtrue;
}
else {
if (io_fflush(fptr) < 0 && NIL_P(err))
err = INT2NUM(errno);
}
}
fptr->fd = -1;
fptr->stdio_file = 0;
fptr->mode &= ~(FMODE_READABLE|FMODE_WRITABLE);
if (IS_PREP_STDIO(fptr) || fd <= 2) {
/* need to keep FILE objects of stdin, stdout and stderr */
}
else if (stdio_file) {
/* stdio_file is deallocated anyway
* even if fclose failed. */
if ((maygvl_fclose(stdio_file, noraise) < 0) && NIL_P(err))
err = noraise ? Qtrue : INT2NUM(errno);
}
else if (0 <= fd) {
/* fptr->fd may be closed even if close fails.
* POSIX doesn't specify it.
* We assumes it is closed. */
/**/
keepgvl |= !(mode & FMODE_WRITABLE);
keepgvl |= noraise;
if ((maygvl_close(fd, keepgvl) < 0) && NIL_P(err))
err = noraise ? Qtrue : INT2NUM(errno);
}
if (!NIL_P(err) && !noraise) {
if (RB_INTEGER_TYPE_P(err))
rb_syserr_fail_path(NUM2INT(err), fptr->pathv);
else
rb_exc_raise(err);
}
}
static void
fptr_finalize(rb_io_t *fptr, int noraise)
{
fptr_finalize_flush(fptr, noraise, FALSE);
free_io_buffer(&fptr->rbuf);
free_io_buffer(&fptr->wbuf);
clear_codeconv(fptr);
}
static void
rb_io_fptr_cleanup(rb_io_t *fptr, int noraise)
{
if (fptr->finalize) {
(*fptr->finalize)(fptr, noraise);
}
else {
fptr_finalize(fptr, noraise);
}
}
static void
free_io_buffer(rb_io_buffer_t *buf)
{
if (buf->ptr) {
ruby_sized_xfree(buf->ptr, (size_t)buf->capa);
buf->ptr = NULL;
}
}
static void
clear_readconv(rb_io_t *fptr)
{
if (fptr->readconv) {
rb_econv_close(fptr->readconv);
fptr->readconv = NULL;
}
free_io_buffer(&fptr->cbuf);
}
static void
clear_writeconv(rb_io_t *fptr)
{
if (fptr->writeconv) {
rb_econv_close(fptr->writeconv);
fptr->writeconv = NULL;
}
fptr->writeconv_initialized = 0;
}
static void
clear_codeconv(rb_io_t *fptr)
{
clear_readconv(fptr);
clear_writeconv(fptr);
}
int
rb_io_fptr_finalize(rb_io_t *fptr)
{
if (!fptr) return 0;
fptr->pathv = Qnil;
if (0 <= fptr->fd)
rb_io_fptr_cleanup(fptr, TRUE);
fptr->write_lock = 0;
free_io_buffer(&fptr->rbuf);
free_io_buffer(&fptr->wbuf);
clear_codeconv(fptr);
free(fptr);
return 1;
}
RUBY_FUNC_EXPORTED size_t
rb_io_memsize(const rb_io_t *fptr)
{
size_t size = sizeof(rb_io_t);
size += fptr->rbuf.capa;
size += fptr->wbuf.capa;
size += fptr->cbuf.capa;
if (fptr->readconv) size += rb_econv_memsize(fptr->readconv);
if (fptr->writeconv) size += rb_econv_memsize(fptr->writeconv);
return size;
}
#ifdef _WIN32
/* keep GVL while closing to prevent crash on Windows */
# define KEEPGVL TRUE
#else
# define KEEPGVL FALSE
#endif
int rb_notify_fd_close(int fd);
static rb_io_t *
io_close_fptr(VALUE io)
{
rb_io_t *fptr;
int fd;
VALUE write_io;
rb_io_t *write_fptr;
int busy;
write_io = GetWriteIO(io);
if (io != write_io) {
write_fptr = RFILE(write_io)->fptr;
if (write_fptr && 0 <= write_fptr->fd) {
rb_io_fptr_cleanup(write_fptr, TRUE);
}
}
fptr = RFILE(io)->fptr;
if (!fptr) return 0;
if (fptr->fd < 0) return 0;
fd = fptr->fd;
busy = rb_notify_fd_close(fd);
if (busy) {
fptr_finalize_flush(fptr, FALSE, KEEPGVL);
do rb_thread_schedule(); while (rb_notify_fd_close(fd));
}
rb_io_fptr_cleanup(fptr, FALSE);
return fptr;
}
static void
fptr_waitpid(rb_io_t *fptr, int nohang)
{
int status;
if (fptr->pid) {
rb_last_status_clear();
rb_waitpid(fptr->pid, &status, nohang ? WNOHANG : 0);
fptr->pid = 0;
}
}
VALUE
rb_io_close(VALUE io)
{
rb_io_t *fptr = io_close_fptr(io);
if (fptr) fptr_waitpid(fptr, 0);
return Qnil;
}
/*
* call-seq:
* ios.close -> nil
*
* Closes <em>ios</em> and flushes any pending writes to the operating
* system. The stream is unavailable for any further data operations;
* an <code>IOError</code> is raised if such an attempt is made. I/O
* streams are automatically closed when they are claimed by the
* garbage collector.
*
* If <em>ios</em> is opened by <code>IO.popen</code>,
* <code>close</code> sets <code>$?</code>.
*
* Calling this method on closed IO object is just ignored since Ruby 2.3.
*/
static VALUE
rb_io_close_m(VALUE io)
{
rb_io_t *fptr = rb_io_get_fptr(io);
if (fptr->fd < 0) {
return Qnil;
}
rb_io_close(io);
return Qnil;
}
static VALUE
io_call_close(VALUE io)
{
rb_check_funcall(io, rb_intern("close"), 0, 0);
return io;
}
static VALUE
ignore_closed_stream(VALUE io, VALUE exc)
{
enum {mesg_len = sizeof(closed_stream)-1};
VALUE mesg = rb_attr_get(exc, rb_intern("mesg"));
if (!RB_TYPE_P(mesg, T_STRING) ||
RSTRING_LEN(mesg) != mesg_len ||
memcmp(RSTRING_PTR(mesg), closed_stream, mesg_len)) {
rb_exc_raise(exc);
}
return io;
}
static VALUE
io_close(VALUE io)
{
VALUE closed = rb_check_funcall(io, rb_intern("closed?"), 0, 0);
if (closed != Qundef && RTEST(closed)) return io;
rb_rescue2(io_call_close, io, ignore_closed_stream, io,
rb_eIOError, (VALUE)0);
return io;
}
/*
* call-seq:
* ios.closed? -> true or false
*
* Returns <code>true</code> if <em>ios</em> is completely closed (for
* duplex streams, both reader and writer), <code>false</code>
* otherwise.
*
* f = File.new("testfile")
* f.close #=> nil
* f.closed? #=> true
* f = IO.popen("/bin/sh","r+")
* f.close_write #=> nil
* f.closed? #=> false
* f.close_read #=> nil
* f.closed? #=> true
*/
static VALUE
rb_io_closed(VALUE io)
{
rb_io_t *fptr;
VALUE write_io;
rb_io_t *write_fptr;
write_io = GetWriteIO(io);
if (io != write_io) {
write_fptr = RFILE(write_io)->fptr;
if (write_fptr && 0 <= write_fptr->fd) {
return Qfalse;
}
}
fptr = rb_io_get_fptr(io);
return 0 <= fptr->fd ? Qfalse : Qtrue;
}
/*
* call-seq:
* ios.close_read -> nil
*
* Closes the read end of a duplex I/O stream (i.e., one that contains
* both a read and a write stream, such as a pipe). Will raise an
* <code>IOError</code> if the stream is not duplexed.
*
* f = IO.popen("/bin/sh","r+")
* f.close_read
* f.readlines
*
* <em>produces:</em>
*
* prog.rb:3:in `readlines': not opened for reading (IOError)
* from prog.rb:3
*
* Calling this method on closed IO object is just ignored since Ruby 2.3.
*/
static VALUE
rb_io_close_read(VALUE io)
{
rb_io_t *fptr;
VALUE write_io;
fptr = rb_io_get_fptr(rb_io_taint_check(io));
if (fptr->fd < 0) return Qnil;
if (is_socket(fptr->fd, fptr->pathv)) {
#ifndef SHUT_RD
# define SHUT_RD 0
#endif
if (shutdown(fptr->fd, SHUT_RD) < 0)
rb_sys_fail_path(fptr->pathv);
fptr->mode &= ~FMODE_READABLE;
if (!(fptr->mode & FMODE_WRITABLE))
return rb_io_close(io);
return Qnil;
}
write_io = GetWriteIO(io);
if (io != write_io) {
rb_io_t *wfptr;
wfptr = rb_io_get_fptr(rb_io_taint_check(write_io));
wfptr->pid = fptr->pid;
fptr->pid = 0;
RFILE(io)->fptr = wfptr;
/* bind to write_io temporarily to get rid of memory/fd leak */
fptr->tied_io_for_writing = 0;
RFILE(write_io)->fptr = fptr;
rb_io_fptr_cleanup(fptr, FALSE);
/* should not finalize fptr because another thread may be reading it */
return Qnil;
}
if ((fptr->mode & (FMODE_DUPLEX|FMODE_WRITABLE)) == FMODE_WRITABLE) {
rb_raise(rb_eIOError, "closing non-duplex IO for reading");
}
return rb_io_close(io);
}
/*
* call-seq:
* ios.close_write -> nil
*
* Closes the write end of a duplex I/O stream (i.e., one that contains
* both a read and a write stream, such as a pipe). Will raise an
* <code>IOError</code> if the stream is not duplexed.
*
* f = IO.popen("/bin/sh","r+")
* f.close_write
* f.print "nowhere"
*
* <em>produces:</em>
*
* prog.rb:3:in `write': not opened for writing (IOError)
* from prog.rb:3:in `print'
* from prog.rb:3
*
* Calling this method on closed IO object is just ignored since Ruby 2.3.
*/
static VALUE
rb_io_close_write(VALUE io)
{
rb_io_t *fptr;
VALUE write_io;
write_io = GetWriteIO(io);
fptr = rb_io_get_fptr(rb_io_taint_check(write_io));
if (fptr->fd < 0) return Qnil;
if (is_socket(fptr->fd, fptr->pathv)) {
#ifndef SHUT_WR
# define SHUT_WR 1
#endif
if (shutdown(fptr->fd, SHUT_WR) < 0)
rb_sys_fail_path(fptr->pathv);
fptr->mode &= ~FMODE_WRITABLE;
if (!(fptr->mode & FMODE_READABLE))
return rb_io_close(write_io);
return Qnil;
}
if ((fptr->mode & (FMODE_DUPLEX|FMODE_READABLE)) == FMODE_READABLE) {
rb_raise(rb_eIOError, "closing non-duplex IO for writing");
}
if (io != write_io) {
fptr = rb_io_get_fptr(rb_io_taint_check(io));
fptr->tied_io_for_writing = 0;
}
rb_io_close(write_io);
return Qnil;
}
/*
* call-seq:
* ios.sysseek(offset, whence=IO::SEEK_SET) -> integer
*
* Seeks to a given <i>offset</i> in the stream according to the value
* of <i>whence</i> (see <code>IO#seek</code> for values of
* <i>whence</i>). Returns the new offset into the file.
*
* f = File.new("testfile")
* f.sysseek(-13, IO::SEEK_END) #=> 53
* f.sysread(10) #=> "And so on."
*/
static VALUE
rb_io_sysseek(int argc, VALUE *argv, VALUE io)
{
VALUE offset, ptrname;
int whence = SEEK_SET;
rb_io_t *fptr;
off_t pos;
if (rb_scan_args(argc, argv, "11", &offset, &ptrname) == 2) {
whence = interpret_seek_whence(ptrname);
}
pos = NUM2OFFT(offset);
GetOpenFile(io, fptr);
if ((fptr->mode & FMODE_READABLE) &&
(READ_DATA_BUFFERED(fptr) || READ_CHAR_PENDING(fptr))) {
rb_raise(rb_eIOError, "sysseek for buffered IO");
}
if ((fptr->mode & FMODE_WRITABLE) && fptr->wbuf.len) {
rb_warn("sysseek for buffered IO");
}
errno = 0;
pos = lseek(fptr->fd, pos, whence);
if (pos == -1 && errno) rb_sys_fail_path(fptr->pathv);
return OFFT2NUM(pos);
}
/*
* call-seq:
* ios.syswrite(string) -> integer
*
* Writes the given string to <em>ios</em> using a low-level write.
* Returns the number of bytes written. Do not mix with other methods
* that write to <em>ios</em> or you may get unpredictable results.
* Raises <code>SystemCallError</code> on error.
*
* f = File.new("out", "w")
* f.syswrite("ABCDEF") #=> 6
*/
static VALUE
rb_io_syswrite(VALUE io, VALUE str)
{
VALUE tmp;
rb_io_t *fptr;
long n, len;
const char *ptr;
if (!RB_TYPE_P(str, T_STRING))
str = rb_obj_as_string(str);
io = GetWriteIO(io);
GetOpenFile(io, fptr);
rb_io_check_writable(fptr);
if (fptr->wbuf.len) {
rb_warn("syswrite for buffered IO");
}
tmp = rb_str_tmp_frozen_acquire(str);
RSTRING_GETMEM(tmp, ptr, len);
n = rb_write_internal(fptr->fd, ptr, len);
if (n == -1) rb_sys_fail_path(fptr->pathv);
rb_str_tmp_frozen_release(str, tmp);
return LONG2FIX(n);
}
/*
* call-seq:
* ios.sysread(maxlen[, outbuf]) -> string
*
* Reads <i>maxlen</i> bytes from <em>ios</em> using a low-level
* read and returns them as a string. Do not mix with other methods
* that read from <em>ios</em> or you may get unpredictable results.
*
* If the optional _outbuf_ argument is present,
* it must reference a String, which will receive the data.
* The _outbuf_ will contain only the received data after the method call
* even if it is not empty at the beginning.
*
* Raises <code>SystemCallError</code> on error and
* <code>EOFError</code> at end of file.
*
* f = File.new("testfile")
* f.sysread(16) #=> "This is line one"
*/
static VALUE
rb_io_sysread(int argc, VALUE *argv, VALUE io)
{
VALUE len, str;
rb_io_t *fptr;
long n, ilen;
struct read_internal_arg arg;
int shrinkable;
rb_scan_args(argc, argv, "11", &len, &str);
ilen = NUM2LONG(len);
shrinkable = io_setstrbuf(&str, ilen);
if (ilen == 0) return str;
GetOpenFile(io, fptr);
rb_io_check_byte_readable(fptr);
if (READ_DATA_BUFFERED(fptr)) {
rb_raise(rb_eIOError, "sysread for buffered IO");
}
/*
* FIXME: removing rb_thread_wait_fd() here changes sysread semantics
* on non-blocking IOs. However, it's still currently possible
* for sysread to raise Errno::EAGAIN if another thread read()s
* the IO after we return from rb_thread_wait_fd() but before
* we call read()
*/
rb_thread_wait_fd(fptr->fd);
rb_io_check_closed(fptr);
io_setstrbuf(&str, ilen);
rb_str_locktmp(str);
arg.fd = fptr->fd;
arg.str_ptr = RSTRING_PTR(str);
arg.len = ilen;
rb_ensure(read_internal_call, (VALUE)&arg, rb_str_unlocktmp, str);
n = arg.len;
if (n == -1) {
rb_sys_fail_path(fptr->pathv);
}
io_set_read_length(str, n, shrinkable);
if (n == 0 && ilen > 0) {
rb_eof_error();
}
OBJ_TAINT(str);
return str;
}
#if defined(HAVE_PREAD) || defined(HAVE_PWRITE)
struct prdwr_internal_arg {
int fd;
void *buf;
size_t count;
off_t offset;
};
#endif /* HAVE_PREAD || HAVE_PWRITE */
#if defined(HAVE_PREAD)
static VALUE
internal_pread_func(void *arg)
{
struct prdwr_internal_arg *p = arg;
return (VALUE)pread(p->fd, p->buf, p->count, p->offset);
}
static VALUE
pread_internal_call(VALUE arg)
{
struct prdwr_internal_arg *p = (struct prdwr_internal_arg *)arg;
return rb_thread_io_blocking_region(internal_pread_func, p, p->fd);
}
/*
* call-seq:
* ios.pread(maxlen, offset[, outbuf]) -> string
*
* Reads <i>maxlen</i> bytes from <em>ios</em> using the pread system call
* and returns them as a string without modifying the underlying
* descriptor offset. This is advantageous compared to combining IO#seek
* and IO#read in that it is atomic, allowing multiple threads/process to
* share the same IO object for reading the file at various locations.
* This bypasses any userspace buffering of the IO layer.
* If the optional <i>outbuf</i> argument is present, it must
* reference a String, which will receive the data.
* Raises <code>SystemCallError</code> on error, <code>EOFError</code>
* at end of file and <code>NotImplementedError</code> if platform does not
* implement the system call.
*
* f = File.new("testfile")
* f.read #=> "This is line one\nThis is line two\n"
* f.pread(12, 0) #=> "This is line"
* f.pread(9, 8) #=> "line one\n"
*/
static VALUE
rb_io_pread(int argc, VALUE *argv, VALUE io)
{
VALUE len, offset, str;
rb_io_t *fptr;
ssize_t n;
struct prdwr_internal_arg arg;
int shrinkable;
rb_scan_args(argc, argv, "21", &len, &offset, &str);
arg.count = NUM2SIZET(len);
arg.offset = NUM2OFFT(offset);
shrinkable = io_setstrbuf(&str, (long)arg.count);
if (arg.count == 0) return str;
arg.buf = RSTRING_PTR(str);
GetOpenFile(io, fptr);
rb_io_check_byte_readable(fptr);
arg.fd = fptr->fd;
rb_io_check_closed(fptr);
rb_str_locktmp(str);
n = (ssize_t)rb_ensure(pread_internal_call, (VALUE)&arg, rb_str_unlocktmp, str);
if (n == -1) {
rb_sys_fail_path(fptr->pathv);
}
io_set_read_length(str, n, shrinkable);
if (n == 0 && arg.count > 0) {
rb_eof_error();
}
OBJ_TAINT(str);
return str;
}
#else
# define rb_io_pread rb_f_notimplement
#endif /* HAVE_PREAD */
#if defined(HAVE_PWRITE)
static VALUE
internal_pwrite_func(void *ptr)
{
struct prdwr_internal_arg *arg = ptr;
return (VALUE)pwrite(arg->fd, arg->buf, arg->count, arg->offset);
}
/*
* call-seq:
* ios.pwrite(string, offset) -> integer
*
* Writes the given string to <em>ios</em> at <i>offset</i> using pwrite()
* system call. This is advantageous to combining IO#seek and IO#write
* in that it is atomic, allowing multiple threads/process to share the
* same IO object for reading the file at various locations.
* This bypasses any userspace buffering of the IO layer.
* Returns the number of bytes written.
* Raises <code>SystemCallError</code> on error and <code>NotImplementedError</code>
* if platform does not implement the system call.
*
* f = File.new("out", "w")
* f.pwrite("ABCDEF", 3) #=> 6
*
* File.read("out") #=> "\u0000\u0000\u0000ABCDEF"
*/
static VALUE
rb_io_pwrite(VALUE io, VALUE str, VALUE offset)
{
rb_io_t *fptr;
ssize_t n;
struct prdwr_internal_arg arg;
VALUE tmp;
if (!RB_TYPE_P(str, T_STRING))
str = rb_obj_as_string(str);
arg.offset = NUM2OFFT(offset);
io = GetWriteIO(io);
GetOpenFile(io, fptr);
rb_io_check_writable(fptr);
arg.fd = fptr->fd;
tmp = rb_str_tmp_frozen_acquire(str);
arg.buf = RSTRING_PTR(tmp);
arg.count = (size_t)RSTRING_LEN(tmp);
n = (ssize_t)rb_thread_io_blocking_region(internal_pwrite_func, &arg, fptr->fd);
if (n == -1) rb_sys_fail_path(fptr->pathv);
rb_str_tmp_frozen_release(str, tmp);
return SSIZET2NUM(n);
}
#else
# define rb_io_pwrite rb_f_notimplement
#endif /* HAVE_PWRITE */
VALUE
rb_io_binmode(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (fptr->readconv)
rb_econv_binmode(fptr->readconv);
if (fptr->writeconv)
rb_econv_binmode(fptr->writeconv);
fptr->mode |= FMODE_BINMODE;
fptr->mode &= ~FMODE_TEXTMODE;
fptr->writeconv_pre_ecflags &= ~ECONV_NEWLINE_DECORATOR_MASK;
#ifdef O_BINARY
if (!fptr->readconv) {
SET_BINARY_MODE_WITH_SEEK_CUR(fptr);
}
else {
setmode(fptr->fd, O_BINARY);
}
#endif
return io;
}
static void
io_ascii8bit_binmode(rb_io_t *fptr)
{
if (fptr->readconv) {
rb_econv_close(fptr->readconv);
fptr->readconv = NULL;
}
if (fptr->writeconv) {
rb_econv_close(fptr->writeconv);
fptr->writeconv = NULL;
}
fptr->mode |= FMODE_BINMODE;
fptr->mode &= ~FMODE_TEXTMODE;
SET_BINARY_MODE_WITH_SEEK_CUR(fptr);
fptr->encs.enc = rb_ascii8bit_encoding();
fptr->encs.enc2 = NULL;
fptr->encs.ecflags = 0;
fptr->encs.ecopts = Qnil;
clear_codeconv(fptr);
}
VALUE
rb_io_ascii8bit_binmode(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
io_ascii8bit_binmode(fptr);
return io;
}
/*
* call-seq:
* ios.binmode -> ios
*
* Puts <em>ios</em> into binary mode.
* Once a stream is in binary mode, it cannot be reset to nonbinary mode.
*
* - newline conversion disabled
* - encoding conversion disabled
* - content is treated as ASCII-8BIT
*/
static VALUE
rb_io_binmode_m(VALUE io)
{
VALUE write_io;
rb_io_ascii8bit_binmode(io);
write_io = GetWriteIO(io);
if (write_io != io)
rb_io_ascii8bit_binmode(write_io);
return io;
}
/*
* call-seq:
* ios.binmode? -> true or false
*
* Returns <code>true</code> if <em>ios</em> is binmode.
*/
static VALUE
rb_io_binmode_p(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
return fptr->mode & FMODE_BINMODE ? Qtrue : Qfalse;
}
static const char*
rb_io_fmode_modestr(int fmode)
{
if (fmode & FMODE_APPEND) {
if ((fmode & FMODE_READWRITE) == FMODE_READWRITE) {
return MODE_BTMODE("a+", "ab+", "at+");
}
return MODE_BTMODE("a", "ab", "at");
}
switch (fmode & FMODE_READWRITE) {
default:
rb_raise(rb_eArgError, "invalid access fmode 0x%x", fmode);
case FMODE_READABLE:
return MODE_BTMODE("r", "rb", "rt");
case FMODE_WRITABLE:
return MODE_BTMODE("w", "wb", "wt");
case FMODE_READWRITE:
if (fmode & FMODE_CREATE) {
return MODE_BTMODE("w+", "wb+", "wt+");
}
return MODE_BTMODE("r+", "rb+", "rt+");
}
}
static const char bom_prefix[] = "bom|";
static const char utf_prefix[] = "utf-";
enum {bom_prefix_len = (int)sizeof(bom_prefix) - 1};
enum {utf_prefix_len = (int)sizeof(utf_prefix) - 1};
static int
io_encname_bom_p(const char *name, long len)
{
return len > bom_prefix_len && STRNCASECMP(name, bom_prefix, bom_prefix_len) == 0;
}
int
rb_io_modestr_fmode(const char *modestr)
{
int fmode = 0;
const char *m = modestr, *p = NULL;
switch (*m++) {
case 'r':
fmode |= FMODE_READABLE;
break;
case 'w':
fmode |= FMODE_WRITABLE | FMODE_TRUNC | FMODE_CREATE;
break;
case 'a':
fmode |= FMODE_WRITABLE | FMODE_APPEND | FMODE_CREATE;
break;
default:
error:
rb_raise(rb_eArgError, "invalid access mode %s", modestr);
}
while (*m) {
switch (*m++) {
case 'b':
fmode |= FMODE_BINMODE;
break;
case 't':
fmode |= FMODE_TEXTMODE;
break;
case '+':
fmode |= FMODE_READWRITE;
break;
default:
goto error;
case ':':
p = strchr(m, ':');
if (io_encname_bom_p(m, p ? (long)(p - m) : (long)strlen(m)))
fmode |= FMODE_SETENC_BY_BOM;
goto finished;
}
}
finished:
if ((fmode & FMODE_BINMODE) && (fmode & FMODE_TEXTMODE))
goto error;
return fmode;
}
int
rb_io_oflags_fmode(int oflags)
{
int fmode = 0;
switch (oflags & O_ACCMODE) {
case O_RDONLY:
fmode = FMODE_READABLE;
break;
case O_WRONLY:
fmode = FMODE_WRITABLE;
break;
case O_RDWR:
fmode = FMODE_READWRITE;
break;
}
if (oflags & O_APPEND) {
fmode |= FMODE_APPEND;
}
if (oflags & O_TRUNC) {
fmode |= FMODE_TRUNC;
}
if (oflags & O_CREAT) {
fmode |= FMODE_CREATE;
}
#ifdef O_BINARY
if (oflags & O_BINARY) {
fmode |= FMODE_BINMODE;
}
#endif
return fmode;
}
static int
rb_io_fmode_oflags(int fmode)
{
int oflags = 0;
switch (fmode & FMODE_READWRITE) {
case FMODE_READABLE:
oflags |= O_RDONLY;
break;
case FMODE_WRITABLE:
oflags |= O_WRONLY;
break;
case FMODE_READWRITE:
oflags |= O_RDWR;
break;
}
if (fmode & FMODE_APPEND) {
oflags |= O_APPEND;
}
if (fmode & FMODE_TRUNC) {
oflags |= O_TRUNC;
}
if (fmode & FMODE_CREATE) {
oflags |= O_CREAT;
}
#ifdef O_BINARY
if (fmode & FMODE_BINMODE) {
oflags |= O_BINARY;
}
#endif
return oflags;
}
int
rb_io_modestr_oflags(const char *modestr)
{
return rb_io_fmode_oflags(rb_io_modestr_fmode(modestr));
}
static const char*
rb_io_oflags_modestr(int oflags)
{
#ifdef O_BINARY
# define MODE_BINARY(a,b) ((oflags & O_BINARY) ? (b) : (a))
#else
# define MODE_BINARY(a,b) (a)
#endif
int accmode = oflags & (O_RDONLY|O_WRONLY|O_RDWR);
if (oflags & O_APPEND) {
if (accmode == O_WRONLY) {
return MODE_BINARY("a", "ab");
}
if (accmode == O_RDWR) {
return MODE_BINARY("a+", "ab+");
}
}
switch (oflags & (O_RDONLY|O_WRONLY|O_RDWR)) {
default:
rb_raise(rb_eArgError, "invalid access oflags 0x%x", oflags);
case O_RDONLY:
return MODE_BINARY("r", "rb");
case O_WRONLY:
return MODE_BINARY("w", "wb");
case O_RDWR:
if (oflags & O_TRUNC) {
return MODE_BINARY("w+", "wb+");
}
return MODE_BINARY("r+", "rb+");
}
}
/*
* Convert external/internal encodings to enc/enc2
* NULL => use default encoding
* Qnil => no encoding specified (internal only)
*/
static void
rb_io_ext_int_to_encs(rb_encoding *ext, rb_encoding *intern, rb_encoding **enc, rb_encoding **enc2, int fmode)
{
int default_ext = 0;
if (ext == NULL) {
ext = rb_default_external_encoding();
default_ext = 1;
}
if (ext == rb_ascii8bit_encoding()) {
/* If external is ASCII-8BIT, no transcoding */
intern = NULL;
}
else if (intern == NULL) {
intern = rb_default_internal_encoding();
}
if (intern == NULL || intern == (rb_encoding *)Qnil ||
(!(fmode & FMODE_SETENC_BY_BOM) && (intern == ext))) {
/* No internal encoding => use external + no transcoding */
*enc = (default_ext && intern != ext) ? NULL : ext;
*enc2 = NULL;
}
else {
*enc = intern;
*enc2 = ext;
}
}
static void
unsupported_encoding(const char *name, rb_encoding *enc)
{
rb_enc_warn(enc, "Unsupported encoding %s ignored", name);
}
static void
parse_mode_enc(const char *estr, rb_encoding *estr_enc,
rb_encoding **enc_p, rb_encoding **enc2_p, int *fmode_p)
{
const char *p;
char encname[ENCODING_MAXNAMELEN+1];
int idx, idx2;
int fmode = fmode_p ? *fmode_p : 0;
rb_encoding *ext_enc, *int_enc;
long len;
/* parse estr as "enc" or "enc2:enc" or "enc:-" */
p = strrchr(estr, ':');
len = p ? (p++ - estr) : (long)strlen(estr);
if ((fmode & FMODE_SETENC_BY_BOM) || io_encname_bom_p(estr, len)) {
estr += bom_prefix_len;
len -= bom_prefix_len;
if (!STRNCASECMP(estr, utf_prefix, utf_prefix_len)) {
fmode |= FMODE_SETENC_BY_BOM;
}
else {
rb_enc_warn(estr_enc, "BOM with non-UTF encoding %s is nonsense", estr);
fmode &= ~FMODE_SETENC_BY_BOM;
}
}
if (len == 0 || len > ENCODING_MAXNAMELEN) {
idx = -1;
}
else {
if (p) {
memcpy(encname, estr, len);
encname[len] = '\0';
estr = encname;
}
idx = rb_enc_find_index(estr);
}
if (fmode_p) *fmode_p = fmode;
if (idx >= 0)
ext_enc = rb_enc_from_index(idx);
else {
if (idx != -2)
unsupported_encoding(estr, estr_enc);
ext_enc = NULL;
}
int_enc = NULL;
if (p) {
if (*p == '-' && *(p+1) == '\0') {
/* Special case - "-" => no transcoding */
int_enc = (rb_encoding *)Qnil;
}
else {
idx2 = rb_enc_find_index(p);
if (idx2 < 0)
unsupported_encoding(p, estr_enc);
else if (!(fmode & FMODE_SETENC_BY_BOM) && (idx2 == idx)) {
int_enc = (rb_encoding *)Qnil;
}
else
int_enc = rb_enc_from_index(idx2);
}
}
rb_io_ext_int_to_encs(ext_enc, int_enc, enc_p, enc2_p, fmode);
}
int
rb_io_extract_encoding_option(VALUE opt, rb_encoding **enc_p, rb_encoding **enc2_p, int *fmode_p)
{
VALUE encoding=Qnil, extenc=Qundef, intenc=Qundef, tmp;
int extracted = 0;
rb_encoding *extencoding = NULL;
rb_encoding *intencoding = NULL;
if (!NIL_P(opt)) {
VALUE v;
v = rb_hash_lookup2(opt, sym_encoding, Qnil);
if (v != Qnil) encoding = v;
v = rb_hash_lookup2(opt, sym_extenc, Qundef);
if (v != Qnil) extenc = v;
v = rb_hash_lookup2(opt, sym_intenc, Qundef);
if (v != Qundef) intenc = v;
}
if ((extenc != Qundef || intenc != Qundef) && !NIL_P(encoding)) {
if (!NIL_P(ruby_verbose)) {
int idx = rb_to_encoding_index(encoding);
if (idx >= 0) encoding = rb_enc_from_encoding(rb_enc_from_index(idx));
rb_warn("Ignoring encoding parameter '%"PRIsVALUE"': %s_encoding is used",
encoding, extenc == Qundef ? "internal" : "external");
}
encoding = Qnil;
}
if (extenc != Qundef && !NIL_P(extenc)) {
extencoding = rb_to_encoding(extenc);
}
if (intenc != Qundef) {
if (NIL_P(intenc)) {
/* internal_encoding: nil => no transcoding */
intencoding = (rb_encoding *)Qnil;
}
else if (!NIL_P(tmp = rb_check_string_type(intenc))) {
char *p = StringValueCStr(tmp);
if (*p == '-' && *(p+1) == '\0') {
/* Special case - "-" => no transcoding */
intencoding = (rb_encoding *)Qnil;
}
else {
intencoding = rb_to_encoding(intenc);
}
}
else {
intencoding = rb_to_encoding(intenc);
}
if (extencoding == intencoding) {
intencoding = (rb_encoding *)Qnil;
}
}
if (!NIL_P(encoding)) {
extracted = 1;
if (!NIL_P(tmp = rb_check_string_type(encoding))) {
parse_mode_enc(StringValueCStr(tmp), rb_enc_get(tmp),
enc_p, enc2_p, fmode_p);
}
else {
rb_io_ext_int_to_encs(rb_to_encoding(encoding), NULL, enc_p, enc2_p, 0);
}
}
else if (extenc != Qundef || intenc != Qundef) {
extracted = 1;
rb_io_ext_int_to_encs(extencoding, intencoding, enc_p, enc2_p, 0);
}
return extracted;
}
typedef struct rb_io_enc_t convconfig_t;
static void
validate_enc_binmode(int *fmode_p, int ecflags, rb_encoding *enc, rb_encoding *enc2)
{
int fmode = *fmode_p;
if ((fmode & FMODE_READABLE) &&
!enc2 &&
!(fmode & FMODE_BINMODE) &&
!rb_enc_asciicompat(enc ? enc : rb_default_external_encoding()))
rb_raise(rb_eArgError, "ASCII incompatible encoding needs binmode");
if ((fmode & FMODE_BINMODE) && (ecflags & ECONV_NEWLINE_DECORATOR_MASK)) {
rb_raise(rb_eArgError, "newline decorator with binary mode");
}
if (!(fmode & FMODE_BINMODE) &&
(DEFAULT_TEXTMODE || (ecflags & ECONV_NEWLINE_DECORATOR_MASK))) {
fmode |= FMODE_TEXTMODE;
*fmode_p = fmode;
}
#if !DEFAULT_TEXTMODE
else if (!(ecflags & ECONV_NEWLINE_DECORATOR_MASK)) {
fmode &= ~FMODE_TEXTMODE;
*fmode_p = fmode;
}
#endif
}
static void
extract_binmode(VALUE opthash, int *fmode)
{
if (!NIL_P(opthash)) {
VALUE v;
v = rb_hash_aref(opthash, sym_textmode);
if (!NIL_P(v)) {
if (*fmode & FMODE_TEXTMODE)
rb_raise(rb_eArgError, "textmode specified twice");
if (*fmode & FMODE_BINMODE)
rb_raise(rb_eArgError, "both textmode and binmode specified");
if (RTEST(v))
*fmode |= FMODE_TEXTMODE;
}
v = rb_hash_aref(opthash, sym_binmode);
if (!NIL_P(v)) {
if (*fmode & FMODE_BINMODE)
rb_raise(rb_eArgError, "binmode specified twice");
if (*fmode & FMODE_TEXTMODE)
rb_raise(rb_eArgError, "both textmode and binmode specified");
if (RTEST(v))
*fmode |= FMODE_BINMODE;
}
if ((*fmode & FMODE_BINMODE) && (*fmode & FMODE_TEXTMODE))
rb_raise(rb_eArgError, "both textmode and binmode specified");
}
}
static void
rb_io_extract_modeenc(VALUE *vmode_p, VALUE *vperm_p, VALUE opthash,
int *oflags_p, int *fmode_p, convconfig_t *convconfig_p)
{
VALUE vmode;
int oflags, fmode;
rb_encoding *enc, *enc2;
int ecflags;
VALUE ecopts;
int has_enc = 0, has_vmode = 0;
VALUE intmode;
vmode = *vmode_p;
/* Set to defaults */
rb_io_ext_int_to_encs(NULL, NULL, &enc, &enc2, 0);
vmode_handle:
if (NIL_P(vmode)) {
fmode = FMODE_READABLE;
oflags = O_RDONLY;
}
else if (!NIL_P(intmode = rb_check_to_integer(vmode, "to_int"))) {
vmode = intmode;
oflags = NUM2INT(intmode);
fmode = rb_io_oflags_fmode(oflags);
}
else {
const char *p;
SafeStringValue(vmode);
p = StringValueCStr(vmode);
fmode = rb_io_modestr_fmode(p);
oflags = rb_io_fmode_oflags(fmode);
p = strchr(p, ':');
if (p) {
has_enc = 1;
parse_mode_enc(p+1, rb_enc_get(vmode), &enc, &enc2, &fmode);
}
else {
rb_encoding *e;
e = (fmode & FMODE_BINMODE) ? rb_ascii8bit_encoding() : NULL;
rb_io_ext_int_to_encs(e, NULL, &enc, &enc2, fmode);
}
}
if (NIL_P(opthash)) {
ecflags = (fmode & FMODE_READABLE) ?
MODE_BTMODE(ECONV_DEFAULT_NEWLINE_DECORATOR,
0, ECONV_UNIVERSAL_NEWLINE_DECORATOR) : 0;
#ifdef TEXTMODE_NEWLINE_DECORATOR_ON_WRITE
ecflags |= (fmode & FMODE_WRITABLE) ?
MODE_BTMODE(TEXTMODE_NEWLINE_DECORATOR_ON_WRITE,
0, TEXTMODE_NEWLINE_DECORATOR_ON_WRITE) : 0;
#endif
SET_UNIVERSAL_NEWLINE_DECORATOR_IF_ENC2(enc2, ecflags);
ecopts = Qnil;
}
else {
VALUE v;
if (!has_vmode) {
v = rb_hash_aref(opthash, sym_mode);
if (!NIL_P(v)) {
if (!NIL_P(vmode)) {
rb_raise(rb_eArgError, "mode specified twice");
}
has_vmode = 1;
vmode = v;
goto vmode_handle;
}
}
v = rb_hash_aref(opthash, sym_flags);
if (!NIL_P(v)) {
v = rb_to_int(v);
oflags |= NUM2INT(v);
vmode = INT2NUM(oflags);
fmode = rb_io_oflags_fmode(oflags);
}
extract_binmode(opthash, &fmode);
if (fmode & FMODE_BINMODE) {
#ifdef O_BINARY
oflags |= O_BINARY;
#endif
if (!has_enc)
rb_io_ext_int_to_encs(rb_ascii8bit_encoding(), NULL, &enc, &enc2, fmode);
}
#if DEFAULT_TEXTMODE
else if (NIL_P(vmode)) {
fmode |= DEFAULT_TEXTMODE;
}
#endif
v = rb_hash_aref(opthash, sym_perm);
if (!NIL_P(v)) {
if (vperm_p) {
if (!NIL_P(*vperm_p)) {
rb_raise(rb_eArgError, "perm specified twice");
}
*vperm_p = v;
}
else {
/* perm no use, just ignore */
}
}
ecflags = (fmode & FMODE_READABLE) ?
MODE_BTMODE(ECONV_DEFAULT_NEWLINE_DECORATOR,
0, ECONV_UNIVERSAL_NEWLINE_DECORATOR) : 0;
#ifdef TEXTMODE_NEWLINE_DECORATOR_ON_WRITE
ecflags |= (fmode & FMODE_WRITABLE) ?
MODE_BTMODE(TEXTMODE_NEWLINE_DECORATOR_ON_WRITE,
0, TEXTMODE_NEWLINE_DECORATOR_ON_WRITE) : 0;
#endif
if (rb_io_extract_encoding_option(opthash, &enc, &enc2, &fmode)) {
if (has_enc) {
rb_raise(rb_eArgError, "encoding specified twice");
}
}
SET_UNIVERSAL_NEWLINE_DECORATOR_IF_ENC2(enc2, ecflags);
ecflags = rb_econv_prepare_options(opthash, &ecopts, ecflags);
}
validate_enc_binmode(&fmode, ecflags, enc, enc2);
*vmode_p = vmode;
*oflags_p = oflags;
*fmode_p = fmode;
convconfig_p->enc = enc;
convconfig_p->enc2 = enc2;
convconfig_p->ecflags = ecflags;
convconfig_p->ecopts = ecopts;
}
struct sysopen_struct {
VALUE fname;
int oflags;
mode_t perm;
};
static void *
sysopen_func(void *ptr)
{
const struct sysopen_struct *data = ptr;
const char *fname = RSTRING_PTR(data->fname);
return (void *)(VALUE)rb_cloexec_open(fname, data->oflags, data->perm);
}
static inline int
rb_sysopen_internal(struct sysopen_struct *data)
{
int fd;
fd = (int)(VALUE)rb_thread_call_without_gvl(sysopen_func, data, RUBY_UBF_IO, 0);
if (0 <= fd)
rb_update_max_fd(fd);
return fd;
}
static int
rb_sysopen(VALUE fname, int oflags, mode_t perm)
{
int fd;
struct sysopen_struct data;
data.fname = rb_str_encode_ospath(fname);
StringValueCStr(data.fname);
data.oflags = oflags;
data.perm = perm;
fd = rb_sysopen_internal(&data);
if (fd < 0) {
int e = errno;
if (rb_gc_for_fd(e)) {
fd = rb_sysopen_internal(&data);
}
if (fd < 0) {
rb_syserr_fail_path(e, fname);
}
}
return fd;
}
FILE *
rb_fdopen(int fd, const char *modestr)
{
FILE *file;
#if defined(__sun)
errno = 0;
#endif
file = fdopen(fd, modestr);
if (!file) {
int e = errno;
#if defined(__sun)
if (e == 0) {
rb_gc();
errno = 0;
file = fdopen(fd, modestr);
}
else
#endif
if (rb_gc_for_fd(e)) {
file = fdopen(fd, modestr);
}
if (!file) {
#ifdef _WIN32
if (e == 0) e = EINVAL;
#elif defined(__sun)
if (e == 0) e = EMFILE;
#endif
rb_syserr_fail(e, 0);
}
}
/* xxx: should be _IONBF? A buffer in FILE may have trouble. */
#ifdef USE_SETVBUF
if (setvbuf(file, NULL, _IOFBF, 0) != 0)
rb_warn("setvbuf() can't be honoured (fd=%d)", fd);
#endif
return file;
}
static int
io_check_tty(rb_io_t *fptr)
{
int t = isatty(fptr->fd);
if (t)
fptr->mode |= FMODE_TTY|FMODE_DUPLEX;
return t;
}
static VALUE rb_io_internal_encoding(VALUE);
static void io_encoding_set(rb_io_t *, VALUE, VALUE, VALUE);
static int
io_strip_bom(VALUE io)
{
VALUE b1, b2, b3, b4;
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (!(fptr->mode & FMODE_READABLE)) return 0;
if (NIL_P(b1 = rb_io_getbyte(io))) return 0;
switch (b1) {
case INT2FIX(0xEF):
if (NIL_P(b2 = rb_io_getbyte(io))) break;
if (b2 == INT2FIX(0xBB) && !NIL_P(b3 = rb_io_getbyte(io))) {
if (b3 == INT2FIX(0xBF)) {
return rb_utf8_encindex();
}
rb_io_ungetbyte(io, b3);
}
rb_io_ungetbyte(io, b2);
break;
case INT2FIX(0xFE):
if (NIL_P(b2 = rb_io_getbyte(io))) break;
if (b2 == INT2FIX(0xFF)) {
return ENCINDEX_UTF_16BE;
}
rb_io_ungetbyte(io, b2);
break;
case INT2FIX(0xFF):
if (NIL_P(b2 = rb_io_getbyte(io))) break;
if (b2 == INT2FIX(0xFE)) {
b3 = rb_io_getbyte(io);
if (b3 == INT2FIX(0) && !NIL_P(b4 = rb_io_getbyte(io))) {
if (b4 == INT2FIX(0)) {
return ENCINDEX_UTF_32LE;
}
rb_io_ungetbyte(io, b4);
rb_io_ungetbyte(io, b3);
}
else {
rb_io_ungetbyte(io, b3);
return ENCINDEX_UTF_16LE;
}
}
rb_io_ungetbyte(io, b2);
break;
case INT2FIX(0):
if (NIL_P(b2 = rb_io_getbyte(io))) break;
if (b2 == INT2FIX(0) && !NIL_P(b3 = rb_io_getbyte(io))) {
if (b3 == INT2FIX(0xFE) && !NIL_P(b4 = rb_io_getbyte(io))) {
if (b4 == INT2FIX(0xFF)) {
return ENCINDEX_UTF_32BE;
}
rb_io_ungetbyte(io, b4);
}
rb_io_ungetbyte(io, b3);
}
rb_io_ungetbyte(io, b2);
break;
}
rb_io_ungetbyte(io, b1);
return 0;
}
static void
io_set_encoding_by_bom(VALUE io)
{
int idx = io_strip_bom(io);
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (idx) {
io_encoding_set(fptr, rb_enc_from_encoding(rb_enc_from_index(idx)),
rb_io_internal_encoding(io), Qnil);
}
else {
fptr->encs.enc2 = NULL;
}
}
static VALUE
rb_file_open_generic(VALUE io, VALUE filename, int oflags, int fmode,
const convconfig_t *convconfig, mode_t perm)
{
VALUE pathv;
rb_io_t *fptr;
convconfig_t cc;
if (!convconfig) {
/* Set to default encodings */
rb_io_ext_int_to_encs(NULL, NULL, &cc.enc, &cc.enc2, fmode);
cc.ecflags = 0;
cc.ecopts = Qnil;
convconfig = &cc;
}
validate_enc_binmode(&fmode, convconfig->ecflags,
convconfig->enc, convconfig->enc2);
MakeOpenFile(io, fptr);
fptr->mode = fmode;
fptr->encs = *convconfig;
pathv = rb_str_new_frozen(filename);
#ifdef O_TMPFILE
if (!(oflags & O_TMPFILE)) {
fptr->pathv = pathv;
}
#else
fptr->pathv = pathv;
#endif
fptr->fd = rb_sysopen(pathv, oflags, perm);
io_check_tty(fptr);
if (fmode & FMODE_SETENC_BY_BOM) io_set_encoding_by_bom(io);
return io;
}
static VALUE
rb_file_open_internal(VALUE io, VALUE filename, const char *modestr)
{
int fmode = rb_io_modestr_fmode(modestr);
const char *p = strchr(modestr, ':');
convconfig_t convconfig;
if (p) {
parse_mode_enc(p+1, rb_usascii_encoding(),
&convconfig.enc, &convconfig.enc2, &fmode);
}
else {
rb_encoding *e;
/* Set to default encodings */
e = (fmode & FMODE_BINMODE) ? rb_ascii8bit_encoding() : NULL;
rb_io_ext_int_to_encs(e, NULL, &convconfig.enc, &convconfig.enc2, fmode);
convconfig.ecflags = 0;
convconfig.ecopts = Qnil;
}
return rb_file_open_generic(io, filename,
rb_io_fmode_oflags(fmode),
fmode,
&convconfig,
0666);
}
VALUE
rb_file_open_str(VALUE fname, const char *modestr)
{
FilePathValue(fname);
return rb_file_open_internal(io_alloc(rb_cFile), fname, modestr);
}
VALUE
rb_file_open(const char *fname, const char *modestr)
{
return rb_file_open_internal(io_alloc(rb_cFile), rb_str_new_cstr(fname), modestr);
}
#if defined(__CYGWIN__) || !defined(HAVE_WORKING_FORK)
static struct pipe_list {
rb_io_t *fptr;
struct pipe_list *next;
} *pipe_list;
static void
pipe_add_fptr(rb_io_t *fptr)
{
struct pipe_list *list;
list = ALLOC(struct pipe_list);
list->fptr = fptr;
list->next = pipe_list;
pipe_list = list;
}
static void
pipe_del_fptr(rb_io_t *fptr)
{
struct pipe_list *list = pipe_list;
struct pipe_list *tmp;
if (list->fptr == fptr) {
pipe_list = list->next;
free(list);
return;
}
while (list->next) {
if (list->next->fptr == fptr) {
tmp = list->next;
list->next = list->next->next;
free(tmp);
return;
}
list = list->next;
}
}
#if defined (_WIN32) || defined(__CYGWIN__)
static void
pipe_atexit(void)
{
struct pipe_list *list = pipe_list;
struct pipe_list *tmp;
while (list) {
tmp = list->next;
rb_io_fptr_finalize(list->fptr);
list = tmp;
}
}
#endif
static void
pipe_finalize(rb_io_t *fptr, int noraise)
{
#if !defined(HAVE_WORKING_FORK) && !defined(_WIN32)
int status = 0;
if (fptr->stdio_file) {
status = pclose(fptr->stdio_file);
}
fptr->fd = -1;
fptr->stdio_file = 0;
rb_last_status_set(status, fptr->pid);
#else
fptr_finalize(fptr, noraise);
#endif
pipe_del_fptr(fptr);
}
#endif
void
rb_io_synchronized(rb_io_t *fptr)
{
rb_io_check_initialized(fptr);
fptr->mode |= FMODE_SYNC;
}
void
rb_io_unbuffered(rb_io_t *fptr)
{
rb_io_synchronized(fptr);
}
int
rb_pipe(int *pipes)
{
int ret;
ret = rb_cloexec_pipe(pipes);
if (ret == -1) {
if (rb_gc_for_fd(errno)) {
ret = rb_cloexec_pipe(pipes);
}
}
if (ret == 0) {
rb_update_max_fd(pipes[0]);
rb_update_max_fd(pipes[1]);
}
return ret;
}
#ifdef _WIN32
#define HAVE_SPAWNV 1
#define spawnv(mode, cmd, args) rb_w32_uaspawn((mode), (cmd), (args))
#define spawn(mode, cmd) rb_w32_uspawn((mode), (cmd), 0)
#endif
#if defined(HAVE_WORKING_FORK) || defined(HAVE_SPAWNV)
struct popen_arg {
VALUE execarg_obj;
struct rb_execarg *eargp;
int modef;
int pair[2];
int write_pair[2];
};
#endif
#ifdef HAVE_WORKING_FORK
static void
popen_redirect(struct popen_arg *p)
{
if ((p->modef & FMODE_READABLE) && (p->modef & FMODE_WRITABLE)) {
close(p->write_pair[1]);
if (p->write_pair[0] != 0) {
dup2(p->write_pair[0], 0);
close(p->write_pair[0]);
}
close(p->pair[0]);
if (p->pair[1] != 1) {
dup2(p->pair[1], 1);
close(p->pair[1]);
}
}
else if (p->modef & FMODE_READABLE) {
close(p->pair[0]);
if (p->pair[1] != 1) {
dup2(p->pair[1], 1);
close(p->pair[1]);
}
}
else {
close(p->pair[1]);
if (p->pair[0] != 0) {
dup2(p->pair[0], 0);
close(p->pair[0]);
}
}
}
#if defined(__linux__)
/* Linux /proc/self/status contains a line: "FDSize:\t<nnn>\n"
* Since /proc may not be available, linux_get_maxfd is just a hint.
* This function, linux_get_maxfd, must be async-signal-safe.
* I.e. opendir() is not usable.
*
* Note that memchr() and memcmp is *not* async-signal-safe in POSIX.
* However they are easy to re-implement in async-signal-safe manner.
* (Also note that there is missing/memcmp.c.)
*/
static int
linux_get_maxfd(void)
{
int fd;
char buf[4096], *p, *np, *e;
ssize_t ss;
fd = rb_cloexec_open("/proc/self/status", O_RDONLY|O_NOCTTY, 0);
if (fd == -1) return -1;
ss = read(fd, buf, sizeof(buf));
if (ss == -1) goto err;
p = buf;
e = buf + ss;
while ((int)sizeof("FDSize:\t0\n")-1 <= e-p &&
(np = memchr(p, '\n', e-p)) != NULL) {
if (memcmp(p, "FDSize:", sizeof("FDSize:")-1) == 0) {
int fdsize;
p += sizeof("FDSize:")-1;
*np = '\0';
fdsize = (int)ruby_strtoul(p, (char **)NULL, 10);
close(fd);
return fdsize;
}
p = np+1;
}
/* fall through */
err:
close(fd);
return -1;
}
#endif
/* This function should be async-signal-safe. */
void
rb_close_before_exec(int lowfd, int maxhint, VALUE noclose_fds)
{
#if defined(HAVE_FCNTL) && defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC)
int fd, ret;
int max = (int)max_file_descriptor;
# ifdef F_MAXFD
/* F_MAXFD is available since NetBSD 2.0. */
ret = fcntl(0, F_MAXFD); /* async-signal-safe */
if (ret != -1)
maxhint = max = ret;
# elif defined(__linux__)
ret = linux_get_maxfd();
if (maxhint < ret)
maxhint = ret;
/* maxhint = max = ret; if (ret == -1) abort(); // test */
# endif
if (max < maxhint)
max = maxhint;
for (fd = lowfd; fd <= max; fd++) {
if (!NIL_P(noclose_fds) &&
RTEST(rb_hash_lookup(noclose_fds, INT2FIX(fd)))) /* async-signal-safe */
continue;
ret = fcntl(fd, F_GETFD); /* async-signal-safe */
if (ret != -1 && !(ret & FD_CLOEXEC)) {
fcntl(fd, F_SETFD, ret|FD_CLOEXEC); /* async-signal-safe */
}
# define CONTIGUOUS_CLOSED_FDS 20
if (ret != -1) {
if (max < fd + CONTIGUOUS_CLOSED_FDS)
max = fd + CONTIGUOUS_CLOSED_FDS;
}
}
#endif
}
static int
popen_exec(void *pp, char *errmsg, size_t errmsg_len)
{
struct popen_arg *p = (struct popen_arg*)pp;
return rb_exec_async_signal_safe(p->eargp, errmsg, errmsg_len);
}
#endif
#if defined(HAVE_WORKING_FORK) || defined(HAVE_SPAWNV)
static VALUE
rb_execarg_fixup_v(VALUE execarg_obj)
{
rb_execarg_parent_start(execarg_obj);
return Qnil;
}
#else
char *rb_execarg_commandline(const struct rb_execarg *eargp, VALUE *prog);
#endif
static VALUE
pipe_open(VALUE execarg_obj, const char *modestr, int fmode,
const convconfig_t *convconfig)
{
struct rb_execarg *eargp = NIL_P(execarg_obj) ? NULL : rb_execarg_get(execarg_obj);
VALUE prog = eargp ? (eargp->use_shell ? eargp->invoke.sh.shell_script : eargp->invoke.cmd.command_name) : Qfalse ;
rb_pid_t pid = 0;
rb_io_t *fptr;
VALUE port;
rb_io_t *write_fptr;
VALUE write_port;
#if defined(HAVE_WORKING_FORK)
int status;
char errmsg[80] = { '\0' };
#endif
#if defined(HAVE_WORKING_FORK) || defined(HAVE_SPAWNV)
int state;
struct popen_arg arg;
#endif
int e = 0;
#if defined(HAVE_SPAWNV)
# if defined(HAVE_SPAWNVE)
# define DO_SPAWN(cmd, args, envp) ((args) ? \
spawnve(P_NOWAIT, (cmd), (args), (envp)) : \
spawne(P_NOWAIT, (cmd), (envp)))
# else
# define DO_SPAWN(cmd, args, envp) ((args) ? \
spawnv(P_NOWAIT, (cmd), (args)) : \
spawn(P_NOWAIT, (cmd)))
# endif
# if !defined(HAVE_WORKING_FORK)
char **args = NULL;
# if defined(HAVE_SPAWNVE)
char **envp = NULL;
# endif
# endif
#endif
#if !defined(HAVE_WORKING_FORK)
struct rb_execarg sarg, *sargp = &sarg;
#endif
FILE *fp = 0;
int fd = -1;
int write_fd = -1;
#if !defined(HAVE_WORKING_FORK)
const char *cmd = 0;
if (prog)
cmd = StringValueCStr(prog);
#endif
#if defined(HAVE_WORKING_FORK) || defined(HAVE_SPAWNV)
arg.execarg_obj = execarg_obj;
arg.eargp = eargp;
arg.modef = fmode;
arg.pair[0] = arg.pair[1] = -1;
arg.write_pair[0] = arg.write_pair[1] = -1;
# if !defined(HAVE_WORKING_FORK)
if (eargp && !eargp->use_shell) {
args = ARGVSTR2ARGV(eargp->invoke.cmd.argv_str);
}
# endif
switch (fmode & (FMODE_READABLE|FMODE_WRITABLE)) {
case FMODE_READABLE|FMODE_WRITABLE:
if (rb_pipe(arg.write_pair) < 0)
rb_sys_fail_str(prog);
if (rb_pipe(arg.pair) < 0) {
e = errno;
close(arg.write_pair[0]);
close(arg.write_pair[1]);
rb_syserr_fail_str(e, prog);
}
if (eargp) {
rb_execarg_addopt(execarg_obj, INT2FIX(0), INT2FIX(arg.write_pair[0]));
rb_execarg_addopt(execarg_obj, INT2FIX(1), INT2FIX(arg.pair[1]));
}
break;
case FMODE_READABLE:
if (rb_pipe(arg.pair) < 0)
rb_sys_fail_str(prog);
if (eargp)
rb_execarg_addopt(execarg_obj, INT2FIX(1), INT2FIX(arg.pair[1]));
break;
case FMODE_WRITABLE:
if (rb_pipe(arg.pair) < 0)
rb_sys_fail_str(prog);
if (eargp)
rb_execarg_addopt(execarg_obj, INT2FIX(0), INT2FIX(arg.pair[0]));
break;
default:
rb_sys_fail_str(prog);
}
if (!NIL_P(execarg_obj)) {
rb_protect(rb_execarg_fixup_v, execarg_obj, &state);
if (state) {
if (0 <= arg.write_pair[0]) close(arg.write_pair[0]);
if (0 <= arg.write_pair[1]) close(arg.write_pair[1]);
if (0 <= arg.pair[0]) close(arg.pair[0]);
if (0 <= arg.pair[1]) close(arg.pair[1]);
rb_execarg_parent_end(execarg_obj);
rb_jump_tag(state);
}
# if defined(HAVE_WORKING_FORK)
pid = rb_fork_async_signal_safe(&status, popen_exec, &arg, arg.eargp->redirect_fds, errmsg, sizeof(errmsg));
# else
rb_execarg_run_options(eargp, sargp, NULL, 0);
# if defined(HAVE_SPAWNVE)
if (eargp->envp_str) envp = (char **)RSTRING_PTR(eargp->envp_str);
# endif
while ((pid = DO_SPAWN(cmd, args, envp)) == -1) {
/* exec failed */
switch (e = errno) {
case EAGAIN:
# if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
# endif
rb_thread_sleep(1);
continue;
}
break;
}
if (eargp)
rb_execarg_run_options(sargp, NULL, NULL, 0);
# endif
rb_execarg_parent_end(execarg_obj);
}
else {
# if defined(HAVE_WORKING_FORK)
pid = rb_fork_ruby(&status);
if (pid == 0) { /* child */
rb_thread_atfork();
popen_redirect(&arg);
rb_io_synchronized(RFILE(orig_stdout)->fptr);
rb_io_synchronized(RFILE(orig_stderr)->fptr);
return Qnil;
}
# else
rb_notimplement();
# endif
}
/* parent */
if (pid == -1) {
# if defined(HAVE_WORKING_FORK)
e = errno;
# endif
close(arg.pair[0]);
close(arg.pair[1]);
if ((fmode & (FMODE_READABLE|FMODE_WRITABLE)) == (FMODE_READABLE|FMODE_WRITABLE)) {
close(arg.write_pair[0]);
close(arg.write_pair[1]);
}
# if defined(HAVE_WORKING_FORK)
if (errmsg[0])
rb_syserr_fail(e, errmsg);
# endif
rb_syserr_fail_str(e, prog);
}
if ((fmode & FMODE_READABLE) && (fmode & FMODE_WRITABLE)) {
close(arg.pair[1]);
fd = arg.pair[0];
close(arg.write_pair[0]);
write_fd = arg.write_pair[1];
}
else if (fmode & FMODE_READABLE) {
close(arg.pair[1]);
fd = arg.pair[0];
}
else {
close(arg.pair[0]);
fd = arg.pair[1];
}
#else
cmd = rb_execarg_commandline(eargp, &prog);
if (!NIL_P(execarg_obj)) {
rb_execarg_parent_start(execarg_obj);
rb_execarg_run_options(eargp, sargp, NULL, 0);
}
fp = popen(cmd, modestr);
e = errno;
if (eargp) {
rb_execarg_parent_end(execarg_obj);
rb_execarg_run_options(sargp, NULL, NULL, 0);
}
if (!fp) rb_syserr_fail_path(e, prog);
fd = fileno(fp);
#endif
port = io_alloc(rb_cIO);
MakeOpenFile(port, fptr);
fptr->fd = fd;
fptr->stdio_file = fp;
fptr->mode = fmode | FMODE_SYNC|FMODE_DUPLEX;
if (convconfig) {
fptr->encs = *convconfig;
#if defined(RUBY_TEST_CRLF_ENVIRONMENT) || defined(_WIN32)
if (fptr->encs.ecflags & ECONV_DEFAULT_NEWLINE_DECORATOR) {
fptr->encs.ecflags |= ECONV_UNIVERSAL_NEWLINE_DECORATOR;
}
#endif
}
else {
if (NEED_NEWLINE_DECORATOR_ON_READ(fptr)) {
fptr->encs.ecflags |= ECONV_UNIVERSAL_NEWLINE_DECORATOR;
}
#ifdef TEXTMODE_NEWLINE_DECORATOR_ON_WRITE
if (NEED_NEWLINE_DECORATOR_ON_WRITE(fptr)) {
fptr->encs.ecflags |= TEXTMODE_NEWLINE_DECORATOR_ON_WRITE;
}
#endif
}
fptr->pid = pid;
if (0 <= write_fd) {
write_port = io_alloc(rb_cIO);
MakeOpenFile(write_port, write_fptr);
write_fptr->fd = write_fd;
write_fptr->mode = (fmode & ~FMODE_READABLE)| FMODE_SYNC|FMODE_DUPLEX;
fptr->mode &= ~FMODE_WRITABLE;
fptr->tied_io_for_writing = write_port;
rb_ivar_set(port, rb_intern("@tied_io_for_writing"), write_port);
}
#if defined (__CYGWIN__) || !defined(HAVE_WORKING_FORK)
fptr->finalize = pipe_finalize;
pipe_add_fptr(fptr);
#endif
return port;
}
static int
is_popen_fork(VALUE prog)
{
if (RSTRING_LEN(prog) == 1 && RSTRING_PTR(prog)[0] == '-') {
#if !defined(HAVE_WORKING_FORK)
rb_raise(rb_eNotImpError,
"fork() function is unimplemented on this machine");
#else
return TRUE;
#endif
}
return FALSE;
}
static VALUE
pipe_open_s(VALUE prog, const char *modestr, int fmode,
const convconfig_t *convconfig)
{
int argc = 1;
VALUE *argv = &prog;
VALUE execarg_obj = Qnil;
if (!is_popen_fork(prog))
execarg_obj = rb_execarg_new(argc, argv, TRUE);
return pipe_open(execarg_obj, modestr, fmode, convconfig);
}
static VALUE
pipe_close(VALUE io)
{
rb_io_t *fptr = io_close_fptr(io);
if (fptr) {
fptr_waitpid(fptr, rb_thread_to_be_killed(rb_thread_current()));
}
return Qnil;
}
/*
* call-seq:
* IO.popen([env,] cmd, mode="r" [, opt]) -> io
* IO.popen([env,] cmd, mode="r" [, opt]) {|io| block } -> obj
*
* Runs the specified command as a subprocess; the subprocess's
* standard input and output will be connected to the returned
* <code>IO</code> object.
*
* The PID of the started process can be obtained by IO#pid method.
*
* _cmd_ is a string or an array as follows.
*
* cmd:
* "-" : fork
* commandline : command line string which is passed to a shell
* [env, cmdname, arg1, ..., opts] : command name and zero or more arguments (no shell)
* [env, [cmdname, argv0], arg1, ..., opts] : command name, argv[0] and zero or more arguments (no shell)
* (env and opts are optional.)
*
* If _cmd_ is a +String+ ``<code>-</code>'',
* then a new instance of Ruby is started as the subprocess.
*
* If <i>cmd</i> is an +Array+ of +String+,
* then it will be used as the subprocess's +argv+ bypassing a shell.
* The array can contain a hash at first for environments and
* a hash at last for options similar to <code>spawn</code>.
*
* The default mode for the new file object is ``r'',
* but <i>mode</i> may be set to any of the modes listed in the description for class IO.
* The last argument <i>opt</i> qualifies <i>mode</i>.
*
* # set IO encoding
* IO.popen("nkf -e filename", :external_encoding=>"EUC-JP") {|nkf_io|
* euc_jp_string = nkf_io.read
* }
*
* # merge standard output and standard error using
* # spawn option. See the document of Kernel.spawn.
* IO.popen(["ls", "/", :err=>[:child, :out]]) {|ls_io|
* ls_result_with_error = ls_io.read
* }
*
* # spawn options can be mixed with IO options
* IO.popen(["ls", "/"], :err=>[:child, :out]) {|ls_io|
* ls_result_with_error = ls_io.read
* }
*
* Raises exceptions which <code>IO.pipe</code> and
* <code>Kernel.spawn</code> raise.
*
* If a block is given, Ruby will run the command as a child connected
* to Ruby with a pipe. Ruby's end of the pipe will be passed as a
* parameter to the block.
* At the end of block, Ruby closes the pipe and sets <code>$?</code>.
* In this case <code>IO.popen</code> returns
* the value of the block.
*
* If a block is given with a _cmd_ of ``<code>-</code>'',
* the block will be run in two separate processes: once in the parent,
* and once in a child. The parent process will be passed the pipe
* object as a parameter to the block, the child version of the block
* will be passed +nil+, and the child's standard in and
* standard out will be connected to the parent through the pipe. Not
* available on all platforms.
*
* f = IO.popen("uname")
* p f.readlines
* f.close
* puts "Parent is #{Process.pid}"
* IO.popen("date") {|f| puts f.gets }
* IO.popen("-") {|f| $stderr.puts "#{Process.pid} is here, f is #{f.inspect}"}
* p $?
* IO.popen(%w"sed -e s|^|<foo>| -e s&$&;zot;&", "r+") {|f|
* f.puts "bar"; f.close_write; puts f.gets
* }
*
* <em>produces:</em>
*
* ["Linux\n"]
* Parent is 21346
* Thu Jan 15 22:41:19 JST 2009
* 21346 is here, f is #<IO:fd 3>
* 21352 is here, f is nil
* #<Process::Status: pid 21352 exit 0>
* <foo>bar;zot;
*/
static VALUE
rb_io_s_popen(int argc, VALUE *argv, VALUE klass)
{
const char *modestr;
VALUE pname, pmode = Qnil, port, tmp, opt = Qnil, env = Qnil, execarg_obj = Qnil;
int oflags, fmode;
convconfig_t convconfig;
if (argc > 1 && !NIL_P(opt = rb_check_hash_type(argv[argc-1]))) --argc;
if (argc > 1 && !NIL_P(env = rb_check_hash_type(argv[0]))) --argc, ++argv;
switch (argc) {
case 2:
pmode = argv[1];
case 1:
pname = argv[0];
break;
default:
{
int ex = !NIL_P(opt);
rb_error_arity(argc + ex, 1 + ex, 2 + ex);
}
}
tmp = rb_check_array_type(pname);
if (!NIL_P(tmp)) {
long len = RARRAY_LEN(tmp);
#if SIZEOF_LONG > SIZEOF_INT
if (len > INT_MAX) {
rb_raise(rb_eArgError, "too many arguments");
}
#endif
execarg_obj = rb_execarg_new((int)len, RARRAY_CONST_PTR(tmp), FALSE);
RB_GC_GUARD(tmp);
}
else {
SafeStringValue(pname);
execarg_obj = Qnil;
if (!is_popen_fork(pname))
execarg_obj = rb_execarg_new(1, &pname, TRUE);
}
if (!NIL_P(execarg_obj)) {
if (!NIL_P(opt))
opt = rb_execarg_extract_options(execarg_obj, opt);
if (!NIL_P(env))
rb_execarg_setenv(execarg_obj, env);
}
rb_io_extract_modeenc(&pmode, 0, opt, &oflags, &fmode, &convconfig);
modestr = rb_io_oflags_modestr(oflags);
port = pipe_open(execarg_obj, modestr, fmode, &convconfig);
if (NIL_P(port)) {
/* child */
if (rb_block_given_p()) {
rb_yield(Qnil);
rb_io_flush(rb_stdout);
rb_io_flush(rb_stderr);
_exit(0);
}
return Qnil;
}
RBASIC_SET_CLASS(port, klass);
if (rb_block_given_p()) {
return rb_ensure(rb_yield, port, pipe_close, port);
}
return port;
}
static void
rb_scan_open_args(int argc, const VALUE *argv,
VALUE *fname_p, int *oflags_p, int *fmode_p,
convconfig_t *convconfig_p, mode_t *perm_p)
{
VALUE opt, fname, vmode, vperm;
int oflags, fmode;
mode_t perm;
argc = rb_scan_args(argc, argv, "12:", &fname, &vmode, &vperm, &opt);
FilePathValue(fname);
rb_io_extract_modeenc(&vmode, &vperm, opt, &oflags, &fmode, convconfig_p);
perm = NIL_P(vperm) ? 0666 : NUM2MODET(vperm);
*fname_p = fname;
*oflags_p = oflags;
*fmode_p = fmode;
*perm_p = perm;
}
static VALUE
rb_open_file(int argc, const VALUE *argv, VALUE io)
{
VALUE fname;
int oflags, fmode;
convconfig_t convconfig;
mode_t perm;
rb_scan_open_args(argc, argv, &fname, &oflags, &fmode, &convconfig, &perm);
rb_file_open_generic(io, fname, oflags, fmode, &convconfig, perm);
return io;
}
/*
* Document-method: File::open
*
* call-seq:
* File.open(filename, mode="r" [, opt]) -> file
* File.open(filename [, mode [, perm]] [, opt]) -> file
* File.open(filename, mode="r" [, opt]) {|file| block } -> obj
* File.open(filename [, mode [, perm]] [, opt]) {|file| block } -> obj
*
* With no associated block, <code>File.open</code> is a synonym for
* File.new. If the optional code block is given, it will
* be passed the opened +file+ as an argument and the File object will
* automatically be closed when the block terminates. The value of the block
* will be returned from <code>File.open</code>.
*
* If a file is being created, its initial permissions may be set using the
* +perm+ parameter. See File.new for further discussion.
*
* See IO.new for a description of the +mode+ and +opt+ parameters.
*/
/*
* Document-method: IO::open
*
* call-seq:
* IO.open(fd, mode="r" [, opt]) -> io
* IO.open(fd, mode="r" [, opt]) {|io| block } -> obj
*
* With no associated block, <code>IO.open</code> is a synonym for IO.new. If
* the optional code block is given, it will be passed +io+ as an argument,
* and the IO object will automatically be closed when the block terminates.
* In this instance, IO.open returns the value of the block.
*
* See IO.new for a description of the +fd+, +mode+ and +opt+ parameters.
*/
static VALUE
rb_io_s_open(int argc, VALUE *argv, VALUE klass)
{
VALUE io = rb_class_new_instance(argc, argv, klass);
if (rb_block_given_p()) {
return rb_ensure(rb_yield, io, io_close, io);
}
return io;
}
/*
* call-seq:
* IO.sysopen(path, [mode, [perm]]) -> integer
*
* Opens the given path, returning the underlying file descriptor as a
* <code>Integer</code>.
*
* IO.sysopen("testfile") #=> 3
*/
static VALUE
rb_io_s_sysopen(int argc, VALUE *argv)
{
VALUE fname, vmode, vperm;
VALUE intmode;
int oflags, fd;
mode_t perm;
rb_scan_args(argc, argv, "12", &fname, &vmode, &vperm);
FilePathValue(fname);
if (NIL_P(vmode))
oflags = O_RDONLY;
else if (!NIL_P(intmode = rb_check_to_integer(vmode, "to_int")))
oflags = NUM2INT(intmode);
else {
SafeStringValue(vmode);
oflags = rb_io_modestr_oflags(StringValueCStr(vmode));
}
if (NIL_P(vperm)) perm = 0666;
else perm = NUM2MODET(vperm);
RB_GC_GUARD(fname) = rb_str_new4(fname);
fd = rb_sysopen(fname, oflags, perm);
return INT2NUM(fd);
}
static VALUE
check_pipe_command(VALUE filename_or_command)
{
char *s = RSTRING_PTR(filename_or_command);
long l = RSTRING_LEN(filename_or_command);
char *e = s + l;
int chlen;
if (rb_enc_ascget(s, e, &chlen, rb_enc_get(filename_or_command)) == '|') {
VALUE cmd = rb_str_new(s+chlen, l-chlen);
OBJ_INFECT(cmd, filename_or_command);
return cmd;
}
return Qnil;
}
/*
* call-seq:
* open(path [, mode [, perm]] [, opt]) -> io or nil
* open(path [, mode [, perm]] [, opt]) {|io| block } -> obj
*
* Creates an IO object connected to the given stream, file, or subprocess.
*
* If +path+ does not start with a pipe character (<code>|</code>), treat it
* as the name of a file to open using the specified mode (defaulting to
* "r").
*
* The +mode+ is either a string or an integer. If it is an integer, it
* must be bitwise-or of open(2) flags, such as File::RDWR or File::EXCL. If
* it is a string, it is either "fmode", "fmode:ext_enc", or
* "fmode:ext_enc:int_enc".
*
* See the documentation of IO.new for full documentation of the +mode+ string
* directives.
*
* If a file is being created, its initial permissions may be set using the
* +perm+ parameter. See File.new and the open(2) and chmod(2) man pages for
* a description of permissions.
*
* If a block is specified, it will be invoked with the IO object as a
* parameter, and the IO will be automatically closed when the block
* terminates. The call returns the value of the block.
*
* If +path+ starts with a pipe character (<code>"|"</code>), a subprocess is
* created, connected to the caller by a pair of pipes. The returned IO
* object may be used to write to the standard input and read from the
* standard output of this subprocess.
*
* If the command following the pipe is a single minus sign
* (<code>"|-"</code>), Ruby forks, and this subprocess is connected to the
* parent. If the command is not <code>"-"</code>, the subprocess runs the
* command.
*
* When the subprocess is Ruby (opened via <code>"|-"</code>), the +open+
* call returns +nil+. If a block is associated with the open call, that
* block will run twice --- once in the parent and once in the child.
*
* The block parameter will be an IO object in the parent and +nil+ in the
* child. The parent's +IO+ object will be connected to the child's $stdin
* and $stdout. The subprocess will be terminated at the end of the block.
*
* === Examples
*
* Reading from "testfile":
*
* open("testfile") do |f|
* print f.gets
* end
*
* Produces:
*
* This is line one
*
* Open a subprocess and read its output:
*
* cmd = open("|date")
* print cmd.gets
* cmd.close
*
* Produces:
*
* Wed Apr 9 08:56:31 CDT 2003
*
* Open a subprocess running the same Ruby program:
*
* f = open("|-", "w+")
* if f.nil?
* puts "in Child"
* exit
* else
* puts "Got: #{f.gets}"
* end
*
* Produces:
*
* Got: in Child
*
* Open a subprocess using a block to receive the IO object:
*
* open "|-" do |f|
* if f then
* # parent process
* puts "Got: #{f.gets}"
* else
* # child process
* puts "in Child"
* end
* end
*
* Produces:
*
* Got: in Child
*/
static VALUE
rb_f_open(int argc, VALUE *argv)
{
ID to_open = 0;
int redirect = FALSE;
if (argc >= 1) {
CONST_ID(to_open, "to_open");
if (rb_respond_to(argv[0], to_open)) {
redirect = TRUE;
}
else {
VALUE tmp = argv[0];
FilePathValue(tmp);
if (NIL_P(tmp)) {
redirect = TRUE;
}
else {
VALUE cmd = check_pipe_command(tmp);
if (!NIL_P(cmd)) {
argv[0] = cmd;
return rb_io_s_popen(argc, argv, rb_cIO);
}
}
}
}
if (redirect) {
VALUE io = rb_funcallv(argv[0], to_open, argc-1, argv+1);
if (rb_block_given_p()) {
return rb_ensure(rb_yield, io, io_close, io);
}
return io;
}
return rb_io_s_open(argc, argv, rb_cFile);
}
static VALUE rb_io_open_generic(VALUE, VALUE, int, int, const convconfig_t *, mode_t);
static VALUE
rb_io_open(VALUE io, VALUE filename, VALUE vmode, VALUE vperm, VALUE opt)
{
int oflags, fmode;
convconfig_t convconfig;
mode_t perm;
rb_io_extract_modeenc(&vmode, &vperm, opt, &oflags, &fmode, &convconfig);
perm = NIL_P(vperm) ? 0666 : NUM2MODET(vperm);
return rb_io_open_generic(io, filename, oflags, fmode, &convconfig, perm);
}
static VALUE
rb_io_open_generic(VALUE klass, VALUE filename, int oflags, int fmode,
const convconfig_t *convconfig, mode_t perm)
{
VALUE cmd;
const int warn = klass == rb_cFile;
if ((warn || klass == rb_cIO) && !NIL_P(cmd = check_pipe_command(filename))) {
if (warn) {
rb_warn("IO.%"PRIsVALUE" called on File to invoke external command",
rb_id2str(rb_frame_this_func()));
}
return pipe_open_s(cmd, rb_io_oflags_modestr(oflags), fmode, convconfig);
}
else {
return rb_file_open_generic(io_alloc(klass), filename,
oflags, fmode, convconfig, perm);
}
}
static VALUE
io_reopen(VALUE io, VALUE nfile)
{
rb_io_t *fptr, *orig;
int fd, fd2;
off_t pos = 0;
nfile = rb_io_get_io(nfile);
GetOpenFile(io, fptr);
GetOpenFile(nfile, orig);
if (fptr == orig) return io;
if (IS_PREP_STDIO(fptr)) {
if ((fptr->stdio_file == stdin && !(orig->mode & FMODE_READABLE)) ||
(fptr->stdio_file == stdout && !(orig->mode & FMODE_WRITABLE)) ||
(fptr->stdio_file == stderr && !(orig->mode & FMODE_WRITABLE))) {
rb_raise(rb_eArgError,
"%s can't change access mode from \"%s\" to \"%s\"",
PREP_STDIO_NAME(fptr), rb_io_fmode_modestr(fptr->mode),
rb_io_fmode_modestr(orig->mode));
}
}
if (fptr->mode & FMODE_WRITABLE) {
if (io_fflush(fptr) < 0)
rb_sys_fail(0);
}
else {
io_tell(fptr);
}
if (orig->mode & FMODE_READABLE) {
pos = io_tell(orig);
}
if (orig->mode & FMODE_WRITABLE) {
if (io_fflush(orig) < 0)
rb_sys_fail(0);
}
/* copy rb_io_t structure */
fptr->mode = orig->mode | (fptr->mode & FMODE_PREP);
fptr->pid = orig->pid;
fptr->lineno = orig->lineno;
if (RTEST(orig->pathv)) fptr->pathv = orig->pathv;
else if (!IS_PREP_STDIO(fptr)) fptr->pathv = Qnil;
fptr->finalize = orig->finalize;
#if defined (__CYGWIN__) || !defined(HAVE_WORKING_FORK)
if (fptr->finalize == pipe_finalize)
pipe_add_fptr(fptr);
#endif
fd = fptr->fd;
fd2 = orig->fd;
if (fd != fd2) {
if (IS_PREP_STDIO(fptr) || fd <= 2 || !fptr->stdio_file) {
/* need to keep FILE objects of stdin, stdout and stderr */
if (rb_cloexec_dup2(fd2, fd) < 0)
rb_sys_fail_path(orig->pathv);
rb_update_max_fd(fd);
}
else {
fclose(fptr->stdio_file);
fptr->stdio_file = 0;
fptr->fd = -1;
if (rb_cloexec_dup2(fd2, fd) < 0)
rb_sys_fail_path(orig->pathv);
rb_update_max_fd(fd);
fptr->fd = fd;
}
rb_notify_fd_close(fd);
if ((orig->mode & FMODE_READABLE) && pos >= 0) {
if (io_seek(fptr, pos, SEEK_SET) < 0 && errno) {
rb_sys_fail_path(fptr->pathv);
}
if (io_seek(orig, pos, SEEK_SET) < 0 && errno) {
rb_sys_fail_path(orig->pathv);
}
}
}
if (fptr->mode & FMODE_BINMODE) {
rb_io_binmode(io);
}
RBASIC_SET_CLASS(io, rb_obj_class(nfile));
return io;
}
#ifdef _WIN32
int rb_freopen(VALUE fname, const char *mode, FILE *fp);
#else
static int
rb_freopen(VALUE fname, const char *mode, FILE *fp)
{
if (!freopen(RSTRING_PTR(fname), mode, fp)) {
RB_GC_GUARD(fname);
return errno;
}
return 0;
}
#endif
/*
* call-seq:
* ios.reopen(other_IO) -> ios
* ios.reopen(path, mode_str) -> ios
*
* Reassociates <em>ios</em> with the I/O stream given in
* <i>other_IO</i> or to a new stream opened on <i>path</i>. This may
* dynamically change the actual class of this stream.
*
* f1 = File.new("testfile")
* f2 = File.new("testfile")
* f2.readlines[0] #=> "This is line one\n"
* f2.reopen(f1) #=> #<File:testfile>
* f2.readlines[0] #=> "This is line one\n"
*/
static VALUE
rb_io_reopen(int argc, VALUE *argv, VALUE file)
{
VALUE fname, nmode, opt;
int oflags;
rb_io_t *fptr;
if (rb_scan_args(argc, argv, "11:", &fname, &nmode, &opt) == 1) {
VALUE tmp = rb_io_check_io(fname);
if (!NIL_P(tmp)) {
return io_reopen(file, tmp);
}
}
FilePathValue(fname);
rb_io_taint_check(file);
fptr = RFILE(file)->fptr;
if (!fptr) {
fptr = RFILE(file)->fptr = ZALLOC(rb_io_t);
}
if (!NIL_P(nmode) || !NIL_P(opt)) {
int fmode;
convconfig_t convconfig;
rb_io_extract_modeenc(&nmode, 0, opt, &oflags, &fmode, &convconfig);
if (IS_PREP_STDIO(fptr) &&
((fptr->mode & FMODE_READWRITE) & (fmode & FMODE_READWRITE)) !=
(fptr->mode & FMODE_READWRITE)) {
rb_raise(rb_eArgError,
"%s can't change access mode from \"%s\" to \"%s\"",
PREP_STDIO_NAME(fptr), rb_io_fmode_modestr(fptr->mode),
rb_io_fmode_modestr(fmode));
}
fptr->mode = fmode;
fptr->encs = convconfig;
}
else {
oflags = rb_io_fmode_oflags(fptr->mode);
}
fptr->pathv = fname;
if (fptr->fd < 0) {
fptr->fd = rb_sysopen(fptr->pathv, oflags, 0666);
fptr->stdio_file = 0;
return file;
}
if (fptr->mode & FMODE_WRITABLE) {
if (io_fflush(fptr) < 0)
rb_sys_fail(0);
}
fptr->rbuf.off = fptr->rbuf.len = 0;
if (fptr->stdio_file) {
int e = rb_freopen(rb_str_encode_ospath(fptr->pathv),
rb_io_oflags_modestr(oflags),
fptr->stdio_file);
if (e) rb_syserr_fail_path(e, fptr->pathv);
fptr->fd = fileno(fptr->stdio_file);
rb_fd_fix_cloexec(fptr->fd);
#ifdef USE_SETVBUF
if (setvbuf(fptr->stdio_file, NULL, _IOFBF, 0) != 0)
rb_warn("setvbuf() can't be honoured for %"PRIsVALUE, fptr->pathv);
#endif
if (fptr->stdio_file == stderr) {
if (setvbuf(fptr->stdio_file, NULL, _IONBF, BUFSIZ) != 0)
rb_warn("setvbuf() can't be honoured for %"PRIsVALUE, fptr->pathv);
}
else if (fptr->stdio_file == stdout && isatty(fptr->fd)) {
if (setvbuf(fptr->stdio_file, NULL, _IOLBF, BUFSIZ) != 0)
rb_warn("setvbuf() can't be honoured for %"PRIsVALUE, fptr->pathv);
}
}
else {
int tmpfd = rb_sysopen(fptr->pathv, oflags, 0666);
int err = 0;
if (rb_cloexec_dup2(tmpfd, fptr->fd) < 0)
err = errno;
(void)close(tmpfd);
if (err) {
rb_syserr_fail_path(err, fptr->pathv);
}
}
return file;
}
/* :nodoc: */
static VALUE
rb_io_init_copy(VALUE dest, VALUE io)
{
rb_io_t *fptr, *orig;
int fd;
VALUE write_io;
off_t pos;
io = rb_io_get_io(io);
if (!OBJ_INIT_COPY(dest, io)) return dest;
GetOpenFile(io, orig);
MakeOpenFile(dest, fptr);
rb_io_flush(io);
/* copy rb_io_t structure */
fptr->mode = orig->mode & ~FMODE_PREP;
fptr->encs = orig->encs;
fptr->pid = orig->pid;
fptr->lineno = orig->lineno;
if (!NIL_P(orig->pathv)) fptr->pathv = orig->pathv;
fptr->finalize = orig->finalize;
#if defined (__CYGWIN__) || !defined(HAVE_WORKING_FORK)
if (fptr->finalize == pipe_finalize)
pipe_add_fptr(fptr);
#endif
fd = ruby_dup(orig->fd);
fptr->fd = fd;
pos = io_tell(orig);
if (0 <= pos)
io_seek(fptr, pos, SEEK_SET);
if (fptr->mode & FMODE_BINMODE) {
rb_io_binmode(dest);
}
write_io = GetWriteIO(io);
if (io != write_io) {
write_io = rb_obj_dup(write_io);
fptr->tied_io_for_writing = write_io;
rb_ivar_set(dest, rb_intern("@tied_io_for_writing"), write_io);
}
return dest;
}
/*
* call-seq:
* ios.printf(format_string [, obj, ...]) -> nil
*
* Formats and writes to <em>ios</em>, converting parameters under
* control of the format string. See <code>Kernel#sprintf</code>
* for details.
*/
VALUE
rb_io_printf(int argc, const VALUE *argv, VALUE out)
{
rb_io_write(out, rb_f_sprintf(argc, argv));
return Qnil;
}
/*
* call-seq:
* printf(io, string [, obj ... ]) -> nil
* printf(string [, obj ... ]) -> nil
*
* Equivalent to:
* io.write(sprintf(string, obj, ...))
* or
* $stdout.write(sprintf(string, obj, ...))
*/
static VALUE
rb_f_printf(int argc, VALUE *argv)
{
VALUE out;
if (argc == 0) return Qnil;
if (RB_TYPE_P(argv[0], T_STRING)) {
out = rb_stdout;
}
else {
out = argv[0];
argv++;
argc--;
}
rb_io_write(out, rb_f_sprintf(argc, argv));
return Qnil;
}
/*
* call-seq:
* ios.print -> nil
* ios.print(obj, ...) -> nil
*
* Writes the given object(s) to <em>ios</em>. Returns +nil+.
*
* The stream must be opened for writing.
* Each given object that isn't a string will be converted by calling
* its <code>to_s</code> method.
* When called without arguments, prints the contents of <code>$_</code>.
*
* If the output field separator (<code>$,</code>) is not +nil+,
* it is inserted between objects.
* If the output record separator (<code>$\\</code>) is not +nil+,
* it is appended to the output.
*
* $stdout.print("This is ", 100, " percent.\n")
*
* <em>produces:</em>
*
* This is 100 percent.
*/
VALUE
rb_io_print(int argc, const VALUE *argv, VALUE out)
{
int i;
VALUE line;
/* if no argument given, print `$_' */
if (argc == 0) {
argc = 1;
line = rb_lastline_get();
argv = &line;
}
for (i=0; i<argc; i++) {
if (!NIL_P(rb_output_fs) && i>0) {
rb_io_write(out, rb_output_fs);
}
rb_io_write(out, argv[i]);
}
if (argc > 0 && !NIL_P(rb_output_rs)) {
rb_io_write(out, rb_output_rs);
}
return Qnil;
}
/*
* call-seq:
* print(obj, ...) -> nil
*
* Prints each object in turn to <code>$stdout</code>. If the output
* field separator (<code>$,</code>) is not +nil+, its
* contents will appear between each field. If the output record
* separator (<code>$\\</code>) is not +nil+, it will be
* appended to the output. If no arguments are given, prints
* <code>$_</code>. Objects that aren't strings will be converted by
* calling their <code>to_s</code> method.
*
* print "cat", [1,2,3], 99, "\n"
* $, = ", "
* $\ = "\n"
* print "cat", [1,2,3], 99
*
* <em>produces:</em>
*
* cat12399
* cat, 1, 2, 3, 99
*/
static VALUE
rb_f_print(int argc, const VALUE *argv)
{
rb_io_print(argc, argv, rb_stdout);
return Qnil;
}
/*
* call-seq:
* ios.putc(obj) -> obj
*
* If <i>obj</i> is <code>Numeric</code>, write the character whose code is
* the least-significant byte of <i>obj</i>.
* If <i>obj</i> is <code>String</code>, write the first character
* of <i>obj</i> to <em>ios</em>.
* Otherwise, raise <code>TypeError</code>.
*
* $stdout.putc "A"
* $stdout.putc 65
*
* <em>produces:</em>
*
* AA
*/
static VALUE
rb_io_putc(VALUE io, VALUE ch)
{
VALUE str;
if (RB_TYPE_P(ch, T_STRING)) {
str = rb_str_substr(ch, 0, 1);
}
else {
char c = NUM2CHR(ch);
str = rb_str_new(&c, 1);
}
rb_io_write(io, str);
return ch;
}
/*
* call-seq:
* putc(int) -> int
*
* Equivalent to:
*
* $stdout.putc(int)
*
* Refer to the documentation for IO#putc for important information regarding
* multi-byte characters.
*/
static VALUE
rb_f_putc(VALUE recv, VALUE ch)
{
if (recv == rb_stdout) {
return rb_io_putc(recv, ch);
}
return rb_funcallv(rb_stdout, rb_intern("putc"), 1, &ch);
}
int
rb_str_end_with_asciichar(VALUE str, int c)
{
long len = RSTRING_LEN(str);
const char *ptr = RSTRING_PTR(str);
rb_encoding *enc = rb_enc_from_index(ENCODING_GET(str));
int n;
if (len == 0) return 0;
if ((n = rb_enc_mbminlen(enc)) == 1) {
return ptr[len - 1] == c;
}
return rb_enc_ascget(ptr + ((len - 1) / n) * n, ptr + len, &n, enc) == c;
}
static VALUE
io_puts_ary(VALUE ary, VALUE out, int recur)
{
VALUE tmp;
long i;
if (recur) {
tmp = rb_str_new2("[...]");
rb_io_puts(1, &tmp, out);
return Qtrue;
}
ary = rb_check_array_type(ary);
if (NIL_P(ary)) return Qfalse;
for (i=0; i<RARRAY_LEN(ary); i++) {
tmp = RARRAY_AREF(ary, i);
rb_io_puts(1, &tmp, out);
}
return Qtrue;
}
/*
* call-seq:
* ios.puts(obj, ...) -> nil
*
* Writes the given object(s) to <em>ios</em>.
* Writes a newline after any that do not already end
* with a newline sequence. Returns +nil+.
*
* The stream must be opened for writing.
* If called with an array argument, writes each element on a new line.
* Each given object that isn't a string or array will be converted
* by calling its +to_s+ method.
* If called without arguments, outputs a single newline.
*
* $stdout.puts("this", "is", ["a", "test"])
*
* <em>produces:</em>
*
* this
* is
* a
* test
*
* Note that +puts+ always uses newlines and is not affected
* by the output record separator (<code>$\\</code>).
*/
VALUE
rb_io_puts(int argc, const VALUE *argv, VALUE out)
{
int i, n;
VALUE line, args[2];
/* if no argument given, print newline. */
if (argc == 0) {
rb_io_write(out, rb_default_rs);
return Qnil;
}
for (i=0; i<argc; i++) {
if (RB_TYPE_P(argv[i], T_STRING)) {
line = argv[i];
goto string;
}
if (rb_exec_recursive(io_puts_ary, argv[i], out)) {
continue;
}
line = rb_obj_as_string(argv[i]);
string:
n = 0;
args[n++] = line;
if (RSTRING_LEN(line) == 0 ||
!rb_str_end_with_asciichar(line, '\n')) {
args[n++] = rb_default_rs;
}
rb_io_writev(out, n, args);
}
return Qnil;
}
/*
* call-seq:
* puts(obj, ...) -> nil
*
* Equivalent to
*
* $stdout.puts(obj, ...)
*/
static VALUE
rb_f_puts(int argc, VALUE *argv, VALUE recv)
{
if (recv == rb_stdout) {
return rb_io_puts(argc, argv, recv);
}
return rb_funcallv(rb_stdout, rb_intern("puts"), argc, argv);
}
void
rb_p(VALUE obj) /* for debug print within C code */
{
VALUE args[2];
args[0] = rb_obj_as_string(rb_inspect(obj));
args[1] = rb_default_rs;
if (RB_TYPE_P(rb_stdout, T_FILE) &&
rb_method_basic_definition_p(CLASS_OF(rb_stdout), id_write)) {
io_writev(2, args, rb_stdout);
}
else {
rb_io_writev(rb_stdout, 2, args);
}
}
struct rb_f_p_arg {
int argc;
VALUE *argv;
};
static VALUE
rb_f_p_internal(VALUE arg)
{
struct rb_f_p_arg *arg1 = (struct rb_f_p_arg*)arg;
int argc = arg1->argc;
VALUE *argv = arg1->argv;
int i;
VALUE ret = Qnil;
for (i=0; i<argc; i++) {
rb_p(argv[i]);
}
if (argc == 1) {
ret = argv[0];
}
else if (argc > 1) {
ret = rb_ary_new4(argc, argv);
}
if (RB_TYPE_P(rb_stdout, T_FILE)) {
rb_io_flush(rb_stdout);
}
return ret;
}
/*
* call-seq:
* p(obj) -> obj
* p(obj1, obj2, ...) -> [obj, ...]
* p() -> nil
*
* For each object, directly writes _obj_.+inspect+ followed by a
* newline to the program's standard output.
*
* S = Struct.new(:name, :state)
* s = S['dave', 'TX']
* p s
*
* <em>produces:</em>
*
* #<S name="dave", state="TX">
*/
static VALUE
rb_f_p(int argc, VALUE *argv, VALUE self)
{
struct rb_f_p_arg arg;
arg.argc = argc;
arg.argv = argv;
return rb_uninterruptible(rb_f_p_internal, (VALUE)&arg);
}
/*
* call-seq:
* obj.display(port=$>) -> nil
*
* Prints <i>obj</i> on the given port (default <code>$></code>).
* Equivalent to:
*
* def display(port=$>)
* port.write self
* nil
* end
*
* For example:
*
* 1.display
* "cat".display
* [ 4, 5, 6 ].display
* puts
*
* <em>produces:</em>
*
* 1cat[4, 5, 6]
*/
static VALUE
rb_obj_display(int argc, VALUE *argv, VALUE self)
{
VALUE out;
if (argc == 0) {
out = rb_stdout;
}
else {
rb_scan_args(argc, argv, "01", &out);
}
rb_io_write(out, self);
return Qnil;
}
void
rb_write_error2(const char *mesg, long len)
{
if (rb_stderr == orig_stderr || RFILE(orig_stderr)->fptr->fd < 0) {
#ifdef _WIN32
if (isatty(fileno(stderr))) {
if (rb_w32_write_console(rb_str_new(mesg, len), fileno(stderr)) > 0) return;
}
#endif
if (fwrite(mesg, sizeof(char), (size_t)len, stderr) < (size_t)len) {
/* failed to write to stderr, what can we do? */
return;
}
}
else {
rb_io_write(rb_stderr, rb_str_new(mesg, len));
}
}
void
rb_write_error(const char *mesg)
{
rb_write_error2(mesg, strlen(mesg));
}
void
rb_write_error_str(VALUE mesg)
{
/* a stopgap measure for the time being */
if (rb_stderr == orig_stderr || RFILE(orig_stderr)->fptr->fd < 0) {
size_t len = (size_t)RSTRING_LEN(mesg);
#ifdef _WIN32
if (isatty(fileno(stderr))) {
if (rb_w32_write_console(mesg, fileno(stderr)) > 0) return;
}
#endif
if (fwrite(RSTRING_PTR(mesg), sizeof(char), len, stderr) < len) {
RB_GC_GUARD(mesg);
return;
}
}
else {
/* may unlock GVL, and */
rb_io_write(rb_stderr, mesg);
}
}
int
rb_stderr_tty_p(void)
{
if (rb_stderr == orig_stderr || RFILE(orig_stderr)->fptr->fd < 0)
return isatty(fileno(stderr));
return 0;
}
static void
must_respond_to(ID mid, VALUE val, ID id)
{
if (!rb_respond_to(val, mid)) {
rb_raise(rb_eTypeError, "%"PRIsVALUE" must have %"PRIsVALUE" method, %"PRIsVALUE" given",
rb_id2str(id), rb_id2str(mid),
rb_obj_class(val));
}
}
static void
stdout_setter(VALUE val, ID id, VALUE *variable)
{
must_respond_to(id_write, val, id);
*variable = val;
}
static VALUE
prep_io(int fd, int fmode, VALUE klass, const char *path)
{
rb_io_t *fp;
VALUE io = io_alloc(klass);
MakeOpenFile(io, fp);
fp->fd = fd;
fp->mode = fmode;
if (!io_check_tty(fp)) {
#ifdef __CYGWIN__
fp->mode |= FMODE_BINMODE;
setmode(fd, O_BINARY);
#endif
}
if (path) fp->pathv = rb_obj_freeze(rb_str_new_cstr(path));
rb_update_max_fd(fd);
return io;
}
VALUE
rb_io_fdopen(int fd, int oflags, const char *path)
{
VALUE klass = rb_cIO;
if (path && strcmp(path, "-")) klass = rb_cFile;
return prep_io(fd, rb_io_oflags_fmode(oflags), klass, path);
}
static VALUE
prep_stdio(FILE *f, int fmode, VALUE klass, const char *path)
{
rb_io_t *fptr;
VALUE io = prep_io(fileno(f), fmode|FMODE_PREP|DEFAULT_TEXTMODE, klass, path);
GetOpenFile(io, fptr);
fptr->encs.ecflags |= ECONV_DEFAULT_NEWLINE_DECORATOR;
#ifdef TEXTMODE_NEWLINE_DECORATOR_ON_WRITE
fptr->encs.ecflags |= TEXTMODE_NEWLINE_DECORATOR_ON_WRITE;
if (fmode & FMODE_READABLE) {
fptr->encs.ecflags |= ECONV_UNIVERSAL_NEWLINE_DECORATOR;
}
#endif
fptr->stdio_file = f;
return io;
}
FILE *
rb_io_stdio_file(rb_io_t *fptr)
{
if (!fptr->stdio_file) {
int oflags = rb_io_fmode_oflags(fptr->mode);
fptr->stdio_file = rb_fdopen(fptr->fd, rb_io_oflags_modestr(oflags));
}
return fptr->stdio_file;
}
static inline void
rb_io_buffer_init(rb_io_buffer_t *buf)
{
buf->ptr = NULL;
buf->off = 0;
buf->len = 0;
buf->capa = 0;
}
static inline rb_io_t *
rb_io_fptr_new(void)
{
rb_io_t *fp = ALLOC(rb_io_t);
fp->fd = -1;
fp->stdio_file = NULL;
fp->mode = 0;
fp->pid = 0;
fp->lineno = 0;
fp->pathv = Qnil;
fp->finalize = 0;
rb_io_buffer_init(&fp->wbuf);
rb_io_buffer_init(&fp->rbuf);
rb_io_buffer_init(&fp->cbuf);
fp->readconv = NULL;
fp->writeconv = NULL;
fp->writeconv_asciicompat = Qnil;
fp->writeconv_pre_ecflags = 0;
fp->writeconv_pre_ecopts = Qnil;
fp->writeconv_initialized = 0;
fp->tied_io_for_writing = 0;
fp->encs.enc = NULL;
fp->encs.enc2 = NULL;
fp->encs.ecflags = 0;
fp->encs.ecopts = Qnil;
fp->write_lock = 0;
return fp;
}
rb_io_t *
rb_io_make_open_file(VALUE obj)
{
rb_io_t *fp = 0;
Check_Type(obj, T_FILE);
if (RFILE(obj)->fptr) {
rb_io_close(obj);
rb_io_fptr_finalize(RFILE(obj)->fptr);
RFILE(obj)->fptr = 0;
}
fp = rb_io_fptr_new();
RFILE(obj)->fptr = fp;
return fp;
}
/*
* call-seq:
* IO.new(fd [, mode] [, opt]) -> io
*
* Returns a new IO object (a stream) for the given integer file descriptor
* +fd+ and +mode+ string. +opt+ may be used to specify parts of +mode+ in a
* more readable fashion. See also IO.sysopen and IO.for_fd.
*
* IO.new is called by various File and IO opening methods such as IO::open,
* Kernel#open, and File::open.
*
* === Open Mode
*
* When +mode+ is an integer it must be combination of the modes defined in
* File::Constants (+File::RDONLY+, <code>File::WRONLY|File::CREAT</code>).
* See the open(2) man page for more information.
*
* When +mode+ is a string it must be in one of the following forms:
*
* fmode
* fmode ":" ext_enc
* fmode ":" ext_enc ":" int_enc
* fmode ":" "BOM|UTF-*"
*
* +fmode+ is an IO open mode string, +ext_enc+ is the external encoding for
* the IO and +int_enc+ is the internal encoding.
*
* ==== IO Open Mode
*
* Ruby allows the following open modes:
*
* "r" Read-only, starts at beginning of file (default mode).
*
* "r+" Read-write, starts at beginning of file.
*
* "w" Write-only, truncates existing file
* to zero length or creates a new file for writing.
*
* "w+" Read-write, truncates existing file to zero length
* or creates a new file for reading and writing.
*
* "a" Write-only, each write call appends data at end of file.
* Creates a new file for writing if file does not exist.
*
* "a+" Read-write, each write call appends data at end of file.
* Creates a new file for reading and writing if file does
* not exist.
*
* The following modes must be used separately, and along with one or more of
* the modes seen above.
*
* "b" Binary file mode
* Suppresses EOL <-> CRLF conversion on Windows. And
* sets external encoding to ASCII-8BIT unless explicitly
* specified.
*
* "t" Text file mode
*
* When the open mode of original IO is read only, the mode cannot be
* changed to be writable. Similarly, the open mode cannot be changed from
* write only to readable.
*
* When such a change is attempted the error is raised in different locations
* according to the platform.
*
* === IO Encoding
*
* When +ext_enc+ is specified, strings read will be tagged by the encoding
* when reading, and strings output will be converted to the specified
* encoding when writing.
*
* When +ext_enc+ and +int_enc+ are specified read strings will be converted
* from +ext_enc+ to +int_enc+ upon input, and written strings will be
* converted from +int_enc+ to +ext_enc+ upon output. See Encoding for
* further details of transcoding on input and output.
*
* If "BOM|UTF-8", "BOM|UTF-16LE" or "BOM|UTF16-BE" are used, Ruby checks for
* a Unicode BOM in the input document to help determine the encoding. For
* UTF-16 encodings the file open mode must be binary. When present, the BOM
* is stripped and the external encoding from the BOM is used. When the BOM
* is missing the given Unicode encoding is used as +ext_enc+. (The BOM-set
* encoding option is case insensitive, so "bom|utf-8" is also valid.)
*
* === Options
*
* +opt+ can be used instead of +mode+ for improved readability. The
* following keys are supported:
*
* :mode ::
* Same as +mode+ parameter
*
* :flags ::
* Specifies file open flags as integer.
* If +mode+ parameter is given, this parameter will be bitwise-ORed.
*
* :\external_encoding ::
* External encoding for the IO.
*
* :\internal_encoding ::
* Internal encoding for the IO. "-" is a synonym for the default internal
* encoding.
*
* If the value is +nil+ no conversion occurs.
*
* :encoding ::
* Specifies external and internal encodings as "extern:intern".
*
* :textmode ::
* If the value is truth value, same as "t" in argument +mode+.
*
* :binmode ::
* If the value is truth value, same as "b" in argument +mode+.
*
* :autoclose ::
* If the value is +false+, the +fd+ will be kept open after this IO
* instance gets finalized.
*
* Also, +opt+ can have same keys in String#encode for controlling conversion
* between the external encoding and the internal encoding.
*
* === Example 1
*
* fd = IO.sysopen("/dev/tty", "w")
* a = IO.new(fd,"w")
* $stderr.puts "Hello"
* a.puts "World"
*
* Produces:
*
* Hello
* World
*
* === Example 2
*
* require 'fcntl'
*
* fd = STDERR.fcntl(Fcntl::F_DUPFD)
* io = IO.new(fd, mode: 'w:UTF-16LE', cr_newline: true)
* io.puts "Hello, World!"
*
* fd = STDERR.fcntl(Fcntl::F_DUPFD)
* io = IO.new(fd, mode: 'w', cr_newline: true,
* external_encoding: Encoding::UTF_16LE)
* io.puts "Hello, World!"
*
* Both of above print "Hello, World!" in UTF-16LE to standard error output
* with converting EOL generated by <code>puts</code> to CR.
*/
static VALUE
rb_io_initialize(int argc, VALUE *argv, VALUE io)
{
VALUE fnum, vmode;
rb_io_t *fp;
int fd, fmode, oflags = O_RDONLY;
convconfig_t convconfig;
VALUE opt;
#if defined(HAVE_FCNTL) && defined(F_GETFL)
int ofmode;
#else
struct stat st;
#endif
argc = rb_scan_args(argc, argv, "11:", &fnum, &vmode, &opt);
rb_io_extract_modeenc(&vmode, 0, opt, &oflags, &fmode, &convconfig);
fd = NUM2INT(fnum);
if (rb_reserved_fd_p(fd)) {
rb_raise(rb_eArgError, "The given fd is not accessible because RubyVM reserves it");
}
#if defined(HAVE_FCNTL) && defined(F_GETFL)
oflags = fcntl(fd, F_GETFL);
if (oflags == -1) rb_sys_fail(0);
#else
if (fstat(fd, &st) == -1) rb_sys_fail(0);
#endif
rb_update_max_fd(fd);
#if defined(HAVE_FCNTL) && defined(F_GETFL)
ofmode = rb_io_oflags_fmode(oflags);
if (NIL_P(vmode)) {
fmode = ofmode;
}
else if ((~ofmode & fmode) & FMODE_READWRITE) {
VALUE error = INT2FIX(EINVAL);
rb_exc_raise(rb_class_new_instance(1, &error, rb_eSystemCallError));
}
#endif
if (!NIL_P(opt) && rb_hash_aref(opt, sym_autoclose) == Qfalse) {
fmode |= FMODE_PREP;
}
MakeOpenFile(io, fp);
fp->fd = fd;
fp->mode = fmode;
fp->encs = convconfig;
clear_codeconv(fp);
io_check_tty(fp);
if (fileno(stdin) == fd)
fp->stdio_file = stdin;
else if (fileno(stdout) == fd)
fp->stdio_file = stdout;
else if (fileno(stderr) == fd)
fp->stdio_file = stderr;
if (fmode & FMODE_SETENC_BY_BOM) io_set_encoding_by_bom(io);
return io;
}
/*
* call-seq:
* File.new(filename, mode="r" [, opt]) -> file
* File.new(filename [, mode [, perm]] [, opt]) -> file
*
* Opens the file named by +filename+ according to the given +mode+ and
* returns a new File object.
*
* See IO.new for a description of +mode+ and +opt+.
*
* If a file is being created, permission bits may be given in +perm+. These
* mode and permission bits are platform dependent; on Unix systems, see
* open(2) and chmod(2) man pages for details.
*
* The new File object is buffered mode (or non-sync mode), unless
* +filename+ is a tty.
* See IO#flush, IO#fsync, IO#fdatasync, and <code>IO#sync=</code>
* about sync mode.
*
* === Examples
*
* f = File.new("testfile", "r")
* f = File.new("newfile", "w+")
* f = File.new("newfile", File::CREAT|File::TRUNC|File::RDWR, 0644)
*/
static VALUE
rb_file_initialize(int argc, VALUE *argv, VALUE io)
{
if (RFILE(io)->fptr) {
rb_raise(rb_eRuntimeError, "reinitializing File");
}
if (0 < argc && argc < 3) {
VALUE fd = rb_check_to_int(argv[0]);
if (!NIL_P(fd)) {
argv[0] = fd;
return rb_io_initialize(argc, argv, io);
}
}
rb_open_file(argc, argv, io);
return io;
}
/* :nodoc: */
static VALUE
rb_io_s_new(int argc, VALUE *argv, VALUE klass)
{
if (rb_block_given_p()) {
VALUE cname = rb_obj_as_string(klass);
rb_warn("%"PRIsVALUE"::new() does not take block; use %"PRIsVALUE"::open() instead",
cname, cname);
}
return rb_class_new_instance(argc, argv, klass);
}
/*
* call-seq:
* IO.for_fd(fd, mode [, opt]) -> io
*
* Synonym for <code>IO.new</code>.
*
*/
static VALUE
rb_io_s_for_fd(int argc, VALUE *argv, VALUE klass)
{
VALUE io = rb_obj_alloc(klass);
rb_io_initialize(argc, argv, io);
return io;
}
/*
* call-seq:
* ios.autoclose? -> true or false
*
* Returns +true+ if the underlying file descriptor of _ios_ will be
* closed automatically at its finalization, otherwise +false+.
*/
static VALUE
rb_io_autoclose_p(VALUE io)
{
rb_io_t *fptr = RFILE(io)->fptr;
rb_io_check_closed(fptr);
return (fptr->mode & FMODE_PREP) ? Qfalse : Qtrue;
}
/*
* call-seq:
* io.autoclose = bool -> true or false
*
* Sets auto-close flag.
*
* f = open("/dev/null")
* IO.for_fd(f.fileno)
* # ...
* f.gets # may cause IOError
*
* f = open("/dev/null")
* IO.for_fd(f.fileno).autoclose = true
* # ...
* f.gets # won't cause IOError
*/
static VALUE
rb_io_set_autoclose(VALUE io, VALUE autoclose)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (!RTEST(autoclose))
fptr->mode |= FMODE_PREP;
else
fptr->mode &= ~FMODE_PREP;
return io;
}
static void
argf_mark(void *ptr)
{
struct argf *p = ptr;
rb_gc_mark(p->filename);
rb_gc_mark(p->current_file);
rb_gc_mark(p->argv);
rb_gc_mark(p->inplace);
rb_gc_mark(p->encs.ecopts);
}
static size_t
argf_memsize(const void *ptr)
{
const struct argf *p = ptr;
size_t size = sizeof(*p);
return size;
}
static const rb_data_type_t argf_type = {
"ARGF",
{argf_mark, RUBY_TYPED_DEFAULT_FREE, argf_memsize},
0, 0, RUBY_TYPED_FREE_IMMEDIATELY
};
static inline void
argf_init(struct argf *p, VALUE v)
{
p->filename = Qnil;
p->current_file = Qnil;
p->lineno = 0;
p->argv = v;
}
static VALUE
argf_alloc(VALUE klass)
{
struct argf *p;
VALUE argf = TypedData_Make_Struct(klass, struct argf, &argf_type, p);
argf_init(p, Qnil);
return argf;
}
#undef rb_argv
/* :nodoc: */
static VALUE
argf_initialize(VALUE argf, VALUE argv)
{
memset(&ARGF, 0, sizeof(ARGF));
argf_init(&ARGF, argv);
return argf;
}
/* :nodoc: */
static VALUE
argf_initialize_copy(VALUE argf, VALUE orig)
{
if (!OBJ_INIT_COPY(argf, orig)) return argf;
ARGF = argf_of(orig);
ARGF.argv = rb_obj_dup(ARGF.argv);
return argf;
}
/*
* call-seq:
* ARGF.lineno = integer -> integer
*
* Sets the line number of +ARGF+ as a whole to the given +Integer+.
*
* +ARGF+ sets the line number automatically as you read data, so normally
* you will not need to set it explicitly. To access the current line number
* use +ARGF.lineno+.
*
* For example:
*
* ARGF.lineno #=> 0
* ARGF.readline #=> "This is line 1\n"
* ARGF.lineno #=> 1
* ARGF.lineno = 0 #=> 0
* ARGF.lineno #=> 0
*/
static VALUE
argf_set_lineno(VALUE argf, VALUE val)
{
ARGF.lineno = NUM2INT(val);
ARGF.last_lineno = ARGF.lineno;
return Qnil;
}
/*
* call-seq:
* ARGF.lineno -> integer
*
* Returns the current line number of ARGF as a whole. This value
* can be set manually with +ARGF.lineno=+.
*
* For example:
*
* ARGF.lineno #=> 0
* ARGF.readline #=> "This is line 1\n"
* ARGF.lineno #=> 1
*/
static VALUE
argf_lineno(VALUE argf)
{
return INT2FIX(ARGF.lineno);
}
static VALUE
argf_forward(int argc, VALUE *argv, VALUE argf)
{
return rb_funcall3(ARGF.current_file, rb_frame_this_func(), argc, argv);
}
#define next_argv() argf_next_argv(argf)
#define ARGF_GENERIC_INPUT_P() \
(ARGF.current_file == rb_stdin && !RB_TYPE_P(ARGF.current_file, T_FILE))
#define ARGF_FORWARD(argc, argv) do {\
if (ARGF_GENERIC_INPUT_P())\
return argf_forward((argc), (argv), argf);\
} while (0)
#define NEXT_ARGF_FORWARD(argc, argv) do {\
if (!next_argv()) return Qnil;\
ARGF_FORWARD((argc), (argv));\
} while (0)
static void
argf_close(VALUE argf)
{
VALUE file = ARGF.current_file;
if (file == rb_stdin) return;
if (RB_TYPE_P(file, T_FILE)) {
rb_io_set_write_io(file, Qnil);
}
io_close(file);
ARGF.init_p = -1;
}
static int
argf_next_argv(VALUE argf)
{
char *fn;
rb_io_t *fptr;
int stdout_binmode = 0;
int fmode;
if (RB_TYPE_P(rb_stdout, T_FILE)) {
GetOpenFile(rb_stdout, fptr);
if (fptr->mode & FMODE_BINMODE)
stdout_binmode = 1;
}
if (ARGF.init_p == 0) {
if (!NIL_P(ARGF.argv) && RARRAY_LEN(ARGF.argv) > 0) {
ARGF.next_p = 1;
}
else {
ARGF.next_p = -1;
}
ARGF.init_p = 1;
}
else {
if (NIL_P(ARGF.argv)) {
ARGF.next_p = -1;
}
else if (ARGF.next_p == -1 && RARRAY_LEN(ARGF.argv) > 0) {
ARGF.next_p = 1;
}
}
if (ARGF.next_p == 1) {
if (ARGF.init_p == 1) argf_close(argf);
retry:
if (RARRAY_LEN(ARGF.argv) > 0) {
VALUE filename = rb_ary_shift(ARGF.argv);
FilePathValue(filename);
ARGF.filename = filename;
fn = StringValueCStr(filename);
if (RSTRING_LEN(filename) == 1 && fn[0] == '-') {
ARGF.current_file = rb_stdin;
if (ARGF.inplace) {
rb_warn("Can't do inplace edit for stdio; skipping");
goto retry;
}
}
else {
VALUE write_io = Qnil;
int fr = rb_sysopen(filename, O_RDONLY, 0);
if (ARGF.inplace) {
struct stat st;
#ifndef NO_SAFE_RENAME
struct stat st2;
#endif
VALUE str;
int fw;
if (RB_TYPE_P(rb_stdout, T_FILE) && rb_stdout != orig_stdout) {
rb_io_close(rb_stdout);
}
fstat(fr, &st);
str = filename;
if (!NIL_P(ARGF.inplace)) {
VALUE suffix = ARGF.inplace;
str = rb_str_dup(str);
if (NIL_P(rb_str_cat_conv_enc_opts(str, RSTRING_LEN(str),
RSTRING_PTR(suffix), RSTRING_LEN(suffix),
rb_enc_get(suffix), 0, Qnil))) {
rb_str_append(str, suffix);
}
#ifdef NO_SAFE_RENAME
(void)close(fr);
(void)unlink(RSTRING_PTR(str));
if (rename(fn, RSTRING_PTR(str)) < 0) {
rb_warn("Can't rename %"PRIsVALUE" to %"PRIsVALUE": %s, skipping file",
filename, str, strerror(errno));
goto retry;
}
fr = rb_sysopen(str, O_RDONLY, 0);
#else
if (rename(fn, RSTRING_PTR(str)) < 0) {
rb_warn("Can't rename %"PRIsVALUE" to %"PRIsVALUE": %s, skipping file",
filename, str, strerror(errno));
close(fr);
goto retry;
}
#endif
}
else {
#ifdef NO_SAFE_RENAME
rb_fatal("Can't do inplace edit without backup");
#else
if (unlink(fn) < 0) {
rb_warn("Can't remove %"PRIsVALUE": %s, skipping file",
filename, strerror(errno));
close(fr);
goto retry;
}
#endif
}
fw = rb_sysopen(filename, O_WRONLY|O_CREAT|O_TRUNC, 0666);
#ifndef NO_SAFE_RENAME
fstat(fw, &st2);
#ifdef HAVE_FCHMOD
fchmod(fw, st.st_mode);
#else
chmod(fn, st.st_mode);
#endif
if (st.st_uid!=st2.st_uid || st.st_gid!=st2.st_gid) {
int err;
#ifdef HAVE_FCHOWN
err = fchown(fw, st.st_uid, st.st_gid);
#else
err = chown(fn, st.st_uid, st.st_gid);
#endif
if (err && getuid() == 0 && st2.st_uid == 0) {
const char *wkfn = RSTRING_PTR(filename);
rb_warn("Can't set owner/group of %"PRIsVALUE" to same as %"PRIsVALUE": %s, skipping file",
filename, str, strerror(errno));
(void)close(fr);
(void)close(fw);
(void)unlink(wkfn);
goto retry;
}
}
#endif
write_io = prep_io(fw, FMODE_WRITABLE, rb_cFile, fn);
rb_stdout = write_io;
if (stdout_binmode) rb_io_binmode(rb_stdout);
}
fmode = FMODE_READABLE;
if (!ARGF.binmode) {
fmode |= DEFAULT_TEXTMODE;
}
ARGF.current_file = prep_io(fr, fmode, rb_cFile, fn);
if (!NIL_P(write_io)) {
rb_io_set_write_io(ARGF.current_file, write_io);
}
}
if (ARGF.binmode) rb_io_ascii8bit_binmode(ARGF.current_file);
GetOpenFile(ARGF.current_file, fptr);
if (ARGF.encs.enc) {
fptr->encs = ARGF.encs;
clear_codeconv(fptr);
}
else {
fptr->encs.ecflags &= ~ECONV_NEWLINE_DECORATOR_MASK;
if (!ARGF.binmode) {
fptr->encs.ecflags |= ECONV_DEFAULT_NEWLINE_DECORATOR;
#ifdef TEXTMODE_NEWLINE_DECORATOR_ON_WRITE
fptr->encs.ecflags |= TEXTMODE_NEWLINE_DECORATOR_ON_WRITE;
#endif
}
}
ARGF.next_p = 0;
}
else {
ARGF.next_p = 1;
return FALSE;
}
}
else if (ARGF.next_p == -1) {
ARGF.current_file = rb_stdin;
ARGF.filename = rb_str_new2("-");
if (ARGF.inplace) {
rb_warn("Can't do inplace edit for stdio");
rb_stdout = orig_stdout;
}
}
if (ARGF.init_p == -1) ARGF.init_p = 1;
return TRUE;
}
static VALUE
argf_getline(int argc, VALUE *argv, VALUE argf)
{
VALUE line;
long lineno = ARGF.lineno;
retry:
if (!next_argv()) return Qnil;
if (ARGF_GENERIC_INPUT_P()) {
line = rb_funcall3(ARGF.current_file, idGets, argc, argv);
}
else {
if (argc == 0 && rb_rs == rb_default_rs) {
line = rb_io_gets(ARGF.current_file);
}
else {
line = rb_io_getline(argc, argv, ARGF.current_file);
}
if (NIL_P(line) && ARGF.next_p != -1) {
argf_close(argf);
ARGF.next_p = 1;
goto retry;
}
}
if (!NIL_P(line)) {
ARGF.lineno = ++lineno;
ARGF.last_lineno = ARGF.lineno;
}
return line;
}
static VALUE
argf_lineno_getter(ID id, VALUE *var)
{
VALUE argf = *var;
return INT2FIX(ARGF.last_lineno);
}
static void
argf_lineno_setter(VALUE val, ID id, VALUE *var)
{
VALUE argf = *var;
int n = NUM2INT(val);
ARGF.last_lineno = ARGF.lineno = n;
}
static VALUE argf_gets(int, VALUE *, VALUE);
/*
* call-seq:
* gets(sep=$/ [, getline_args]) -> string or nil
* gets(limit [, getline_args]) -> string or nil
* gets(sep, limit [, getline_args]) -> string or nil
*
* Returns (and assigns to <code>$_</code>) the next line from the list
* of files in +ARGV+ (or <code>$*</code>), or from standard input if
* no files are present on the command line. Returns +nil+ at end of
* file. The optional argument specifies the record separator. The
* separator is included with the contents of each record. A separator
* of +nil+ reads the entire contents, and a zero-length separator
* reads the input one paragraph at a time, where paragraphs are
* divided by two consecutive newlines. If the first argument is an
* integer, or optional second argument is given, the returning string
* would not be longer than the given value in bytes. If multiple
* filenames are present in +ARGV+, <code>gets(nil)</code> will read
* the contents one file at a time.
*
* ARGV << "testfile"
* print while gets
*
* <em>produces:</em>
*
* This is line one
* This is line two
* This is line three
* And so on...
*
* The style of programming using <code>$_</code> as an implicit
* parameter is gradually losing favor in the Ruby community.
*/
static VALUE
rb_f_gets(int argc, VALUE *argv, VALUE recv)
{
if (recv == argf) {
return argf_gets(argc, argv, argf);
}
return rb_funcallv(argf, idGets, argc, argv);
}
/*
* call-seq:
* ARGF.gets(sep=$/ [, getline_args]) -> string or nil
* ARGF.gets(limit [, getline_args]) -> string or nil
* ARGF.gets(sep, limit [, getline_args]) -> string or nil
*
* Returns the next line from the current file in +ARGF+.
*
* By default lines are assumed to be separated by <code>$/</code>;
* to use a different character as a separator, supply it as a +String+
* for the _sep_ argument.
*
* The optional _limit_ argument specifies how many characters of each line
* to return. By default all characters are returned.
*
* See IO.readlines for details about getline_args.
*
*/
static VALUE
argf_gets(int argc, VALUE *argv, VALUE argf)
{
VALUE line;
line = argf_getline(argc, argv, argf);
rb_lastline_set(line);
return line;
}
VALUE
rb_gets(void)
{
VALUE line;
if (rb_rs != rb_default_rs) {
return rb_f_gets(0, 0, argf);
}
retry:
if (!next_argv()) return Qnil;
line = rb_io_gets(ARGF.current_file);
if (NIL_P(line) && ARGF.next_p != -1) {
rb_io_close(ARGF.current_file);
ARGF.next_p = 1;
goto retry;
}
rb_lastline_set(line);
if (!NIL_P(line)) {
ARGF.lineno++;
ARGF.last_lineno = ARGF.lineno;
}
return line;
}
static VALUE argf_readline(int, VALUE *, VALUE);
/*
* call-seq:
* readline(sep=$/) -> string
* readline(limit) -> string
* readline(sep, limit) -> string
*
* Equivalent to <code>Kernel::gets</code>, except
* +readline+ raises +EOFError+ at end of file.
*/
static VALUE
rb_f_readline(int argc, VALUE *argv, VALUE recv)
{
if (recv == argf) {
return argf_readline(argc, argv, argf);
}
return rb_funcallv(argf, rb_intern("readline"), argc, argv);
}
/*
* call-seq:
* ARGF.readline(sep=$/) -> string
* ARGF.readline(limit) -> string
* ARGF.readline(sep, limit) -> string
*
* Returns the next line from the current file in +ARGF+.
*
* By default lines are assumed to be separated by <code>$/</code>;
* to use a different character as a separator, supply it as a +String+
* for the _sep_ argument.
*
* The optional _limit_ argument specifies how many characters of each line
* to return. By default all characters are returned.
*
* An +EOFError+ is raised at the end of the file.
*/
static VALUE
argf_readline(int argc, VALUE *argv, VALUE argf)
{
VALUE line;
if (!next_argv()) rb_eof_error();
ARGF_FORWARD(argc, argv);
line = argf_gets(argc, argv, argf);
if (NIL_P(line)) {
rb_eof_error();
}
return line;
}
static VALUE argf_readlines(int, VALUE *, VALUE);
/*
* call-seq:
* readlines(sep=$/) -> array
* readlines(limit) -> array
* readlines(sep, limit) -> array
*
* Returns an array containing the lines returned by calling
* <code>Kernel.gets(<i>sep</i>)</code> until the end of file.
*/
static VALUE
rb_f_readlines(int argc, VALUE *argv, VALUE recv)
{
if (recv == argf) {
return argf_readlines(argc, argv, argf);
}
return rb_funcallv(argf, rb_intern("readlines"), argc, argv);
}
/*
* call-seq:
* ARGF.readlines(sep=$/) -> array
* ARGF.readlines(limit) -> array
* ARGF.readlines(sep, limit) -> array
*
* ARGF.to_a(sep=$/) -> array
* ARGF.to_a(limit) -> array
* ARGF.to_a(sep, limit) -> array
*
* Reads +ARGF+'s current file in its entirety, returning an +Array+ of its
* lines, one line per element. Lines are assumed to be separated by _sep_.
*
* lines = ARGF.readlines
* lines[0] #=> "This is line one\n"
*/
static VALUE
argf_readlines(int argc, VALUE *argv, VALUE argf)
{
long lineno = ARGF.lineno;
VALUE lines, ary;
ary = rb_ary_new();
while (next_argv()) {
if (ARGF_GENERIC_INPUT_P()) {
lines = rb_funcall3(ARGF.current_file, rb_intern("readlines"), argc, argv);
}
else {
lines = rb_io_readlines(argc, argv, ARGF.current_file);
argf_close(argf);
}
ARGF.next_p = 1;
rb_ary_concat(ary, lines);
ARGF.lineno = lineno + RARRAY_LEN(ary);
ARGF.last_lineno = ARGF.lineno;
}
ARGF.init_p = 0;
return ary;
}
/*
* call-seq:
* `cmd` -> string
*
* Returns the standard output of running _cmd_ in a subshell.
* The built-in syntax <code>%x{...}</code> uses
* this method. Sets <code>$?</code> to the process status.
*
* `date` #=> "Wed Apr 9 08:56:30 CDT 2003\n"
* `ls testdir`.split[1] #=> "main.rb"
* `echo oops && exit 99` #=> "oops\n"
* $?.exitstatus #=> 99
*/
static VALUE
rb_f_backquote(VALUE obj, VALUE str)
{
VALUE port;
VALUE result;
rb_io_t *fptr;
SafeStringValue(str);
rb_last_status_clear();
port = pipe_open_s(str, "r", FMODE_READABLE|DEFAULT_TEXTMODE, NULL);
if (NIL_P(port)) return rb_str_new(0,0);
GetOpenFile(port, fptr);
result = read_all(fptr, remain_size(fptr), Qnil);
rb_io_close(port);
rb_io_fptr_finalize(fptr);
rb_gc_force_recycle(port); /* also guards from premature GC */
return result;
}
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
static VALUE
select_internal(VALUE read, VALUE write, VALUE except, struct timeval *tp, rb_fdset_t *fds)
{
VALUE res, list;
rb_fdset_t *rp, *wp, *ep;
rb_io_t *fptr;
long i;
int max = 0, n;
int pending = 0;
struct timeval timerec;
if (!NIL_P(read)) {
Check_Type(read, T_ARRAY);
for (i=0; i<RARRAY_LEN(read); i++) {
GetOpenFile(rb_io_get_io(RARRAY_AREF(read, i)), fptr);
rb_fd_set(fptr->fd, &fds[0]);
if (READ_DATA_PENDING(fptr) || READ_CHAR_PENDING(fptr)) { /* check for buffered data */
pending++;
rb_fd_set(fptr->fd, &fds[3]);
}
if (max < fptr->fd) max = fptr->fd;
}
if (pending) { /* no blocking if there's buffered data */
timerec.tv_sec = timerec.tv_usec = 0;
tp = &timerec;
}
rp = &fds[0];
}
else
rp = 0;
if (!NIL_P(write)) {
Check_Type(write, T_ARRAY);
for (i=0; i<RARRAY_LEN(write); i++) {
VALUE write_io = GetWriteIO(rb_io_get_io(RARRAY_AREF(write, i)));
GetOpenFile(write_io, fptr);
rb_fd_set(fptr->fd, &fds[1]);
if (max < fptr->fd) max = fptr->fd;
}
wp = &fds[1];
}
else
wp = 0;
if (!NIL_P(except)) {
Check_Type(except, T_ARRAY);
for (i=0; i<RARRAY_LEN(except); i++) {
VALUE io = rb_io_get_io(RARRAY_AREF(except, i));
VALUE write_io = GetWriteIO(io);
GetOpenFile(io, fptr);
rb_fd_set(fptr->fd, &fds[2]);
if (max < fptr->fd) max = fptr->fd;
if (io != write_io) {
GetOpenFile(write_io, fptr);
rb_fd_set(fptr->fd, &fds[2]);
if (max < fptr->fd) max = fptr->fd;
}
}
ep = &fds[2];
}
else {
ep = 0;
}
max++;
n = rb_thread_fd_select(max, rp, wp, ep, tp);
if (n < 0) {
rb_sys_fail(0);
}
if (!pending && n == 0) return Qnil; /* returns nil on timeout */
res = rb_ary_new2(3);
rb_ary_push(res, rp?rb_ary_new():rb_ary_new2(0));
rb_ary_push(res, wp?rb_ary_new():rb_ary_new2(0));
rb_ary_push(res, ep?rb_ary_new():rb_ary_new2(0));
if (rp) {
list = RARRAY_AREF(res, 0);
for (i=0; i< RARRAY_LEN(read); i++) {
VALUE obj = rb_ary_entry(read, i);
VALUE io = rb_io_get_io(obj);
GetOpenFile(io, fptr);
if (rb_fd_isset(fptr->fd, &fds[0]) ||
rb_fd_isset(fptr->fd, &fds[3])) {
rb_ary_push(list, obj);
}
}
}
if (wp) {
list = RARRAY_AREF(res, 1);
for (i=0; i< RARRAY_LEN(write); i++) {
VALUE obj = rb_ary_entry(write, i);
VALUE io = rb_io_get_io(obj);
VALUE write_io = GetWriteIO(io);
GetOpenFile(write_io, fptr);
if (rb_fd_isset(fptr->fd, &fds[1])) {
rb_ary_push(list, obj);
}
}
}
if (ep) {
list = RARRAY_AREF(res, 2);
for (i=0; i< RARRAY_LEN(except); i++) {
VALUE obj = rb_ary_entry(except, i);
VALUE io = rb_io_get_io(obj);
VALUE write_io = GetWriteIO(io);
GetOpenFile(io, fptr);
if (rb_fd_isset(fptr->fd, &fds[2])) {
rb_ary_push(list, obj);
}
else if (io != write_io) {
GetOpenFile(write_io, fptr);
if (rb_fd_isset(fptr->fd, &fds[2])) {
rb_ary_push(list, obj);
}
}
}
}
return res; /* returns an empty array on interrupt */
}
struct select_args {
VALUE read, write, except;
struct timeval *timeout;
rb_fdset_t fdsets[4];
};
static VALUE
select_call(VALUE arg)
{
struct select_args *p = (struct select_args *)arg;
return select_internal(p->read, p->write, p->except, p->timeout, p->fdsets);
}
static VALUE
select_end(VALUE arg)
{
struct select_args *p = (struct select_args *)arg;
int i;
for (i = 0; i < numberof(p->fdsets); ++i)
rb_fd_term(&p->fdsets[i]);
return Qnil;
}
static VALUE sym_normal, sym_sequential, sym_random,
sym_willneed, sym_dontneed, sym_noreuse;
#ifdef HAVE_POSIX_FADVISE
struct io_advise_struct {
int fd;
int advice;
off_t offset;
off_t len;
};
static VALUE
io_advise_internal(void *arg)
{
struct io_advise_struct *ptr = arg;
return posix_fadvise(ptr->fd, ptr->offset, ptr->len, ptr->advice);
}
static VALUE
io_advise_sym_to_const(VALUE sym)
{
#ifdef POSIX_FADV_NORMAL
if (sym == sym_normal)
return INT2NUM(POSIX_FADV_NORMAL);
#endif
#ifdef POSIX_FADV_RANDOM
if (sym == sym_random)
return INT2NUM(POSIX_FADV_RANDOM);
#endif
#ifdef POSIX_FADV_SEQUENTIAL
if (sym == sym_sequential)
return INT2NUM(POSIX_FADV_SEQUENTIAL);
#endif
#ifdef POSIX_FADV_WILLNEED
if (sym == sym_willneed)
return INT2NUM(POSIX_FADV_WILLNEED);
#endif
#ifdef POSIX_FADV_DONTNEED
if (sym == sym_dontneed)
return INT2NUM(POSIX_FADV_DONTNEED);
#endif
#ifdef POSIX_FADV_NOREUSE
if (sym == sym_noreuse)
return INT2NUM(POSIX_FADV_NOREUSE);
#endif
return Qnil;
}
static VALUE
do_io_advise(rb_io_t *fptr, VALUE advice, off_t offset, off_t len)
{
int rv;
struct io_advise_struct ias;
VALUE num_adv;
num_adv = io_advise_sym_to_const(advice);
/*
* The platform doesn't support this hint. We don't raise exception, instead
* silently ignore it. Because IO::advise is only hint.
*/
if (NIL_P(num_adv))
return Qnil;
ias.fd = fptr->fd;
ias.advice = NUM2INT(num_adv);
ias.offset = offset;
ias.len = len;
rv = (int)rb_thread_io_blocking_region(io_advise_internal, &ias, fptr->fd);
if (rv && rv != ENOSYS) {
/* posix_fadvise(2) doesn't set errno. On success it returns 0; otherwise
it returns the error code. */
VALUE message = rb_sprintf("%"PRIsVALUE" "
"(%"PRI_OFFT_PREFIX"d, "
"%"PRI_OFFT_PREFIX"d, "
"%"PRIsVALUE")",
fptr->pathv, offset, len, advice);
rb_syserr_fail_str(rv, message);
}
return Qnil;
}
#endif /* HAVE_POSIX_FADVISE */
static void
advice_arg_check(VALUE advice)
{
if (!SYMBOL_P(advice))
rb_raise(rb_eTypeError, "advice must be a Symbol");
if (advice != sym_normal &&
advice != sym_sequential &&
advice != sym_random &&
advice != sym_willneed &&
advice != sym_dontneed &&
advice != sym_noreuse) {
rb_raise(rb_eNotImpError, "Unsupported advice: %+"PRIsVALUE, advice);
}
}
/*
* call-seq:
* ios.advise(advice, offset=0, len=0) -> nil
*
* Announce an intention to access data from the current file in a
* specific pattern. On platforms that do not support the
* <em>posix_fadvise(2)</em> system call, this method is a no-op.
*
* _advice_ is one of the following symbols:
*
* :normal:: No advice to give; the default assumption for an open file.
* :sequential:: The data will be accessed sequentially
* with lower offsets read before higher ones.
* :random:: The data will be accessed in random order.
* :willneed:: The data will be accessed in the near future.
* :dontneed:: The data will not be accessed in the near future.
* :noreuse:: The data will only be accessed once.
*
* The semantics of a piece of advice are platform-dependent. See
* <em>man 2 posix_fadvise</em> for details.
*
* "data" means the region of the current file that begins at
* _offset_ and extends for _len_ bytes. If _len_ is 0, the region
* ends at the last byte of the file. By default, both _offset_ and
* _len_ are 0, meaning that the advice applies to the entire file.
*
* If an error occurs, one of the following exceptions will be raised:
*
* <code>IOError</code>:: The <code>IO</code> stream is closed.
* <code>Errno::EBADF</code>::
* The file descriptor of the current file is invalid.
* <code>Errno::EINVAL</code>:: An invalid value for _advice_ was given.
* <code>Errno::ESPIPE</code>::
* The file descriptor of the current file refers to a FIFO or
* pipe. (Linux raises <code>Errno::EINVAL</code> in this case).
* <code>TypeError</code>::
* Either _advice_ was not a Symbol, or one of the
* other arguments was not an <code>Integer</code>.
* <code>RangeError</code>:: One of the arguments given was too big/small.
*
* This list is not exhaustive; other Errno:: exceptions are also possible.
*/
static VALUE
rb_io_advise(int argc, VALUE *argv, VALUE io)
{
VALUE advice, offset, len;
off_t off, l;
rb_io_t *fptr;
rb_scan_args(argc, argv, "12", &advice, &offset, &len);
advice_arg_check(advice);
io = GetWriteIO(io);
GetOpenFile(io, fptr);
off = NIL_P(offset) ? 0 : NUM2OFFT(offset);
l = NIL_P(len) ? 0 : NUM2OFFT(len);
#ifdef HAVE_POSIX_FADVISE
return do_io_advise(fptr, advice, off, l);
#else
((void)off, (void)l); /* Ignore all hint */
return Qnil;
#endif
}
/*
* call-seq:
* IO.select(read_array [, write_array [, error_array [, timeout]]]) -> array or nil
*
* Calls select(2) system call.
* It monitors given arrays of <code>IO</code> objects, waits until one or more
* of <code>IO</code> objects are ready for reading, are ready for writing,
* and have pending exceptions respectively, and returns an array that
* contains arrays of those IO objects. It will return +nil+
* if optional <i>timeout</i> value is given and no <code>IO</code> object
* is ready in <i>timeout</i> seconds.
*
* <code>IO.select</code> peeks the buffer of <code>IO</code> objects for testing readability.
* If the <code>IO</code> buffer is not empty,
* <code>IO.select</code> immediately notifies readability.
* This "peek" only happens for <code>IO</code> objects.
* It does not happen for IO-like objects such as OpenSSL::SSL::SSLSocket.
*
* The best way to use <code>IO.select</code> is invoking it
* after nonblocking methods such as <code>read_nonblock</code>, <code>write_nonblock</code>, etc.
* The methods raise an exception which is extended by
* <code>IO::WaitReadable</code> or <code>IO::WaitWritable</code>.
* The modules notify how the caller should wait with <code>IO.select</code>.
* If <code>IO::WaitReadable</code> is raised, the caller should wait for reading.
* If <code>IO::WaitWritable</code> is raised, the caller should wait for writing.
*
* So, blocking read (<code>readpartial</code>) can be emulated using
* <code>read_nonblock</code> and <code>IO.select</code> as follows:
*
* begin
* result = io_like.read_nonblock(maxlen)
* rescue IO::WaitReadable
* IO.select([io_like])
* retry
* rescue IO::WaitWritable
* IO.select(nil, [io_like])
* retry
* end
*
* Especially, the combination of nonblocking methods and
* <code>IO.select</code> is preferred for <code>IO</code> like
* objects such as <code>OpenSSL::SSL::SSLSocket</code>.
* It has <code>to_io</code> method to return underlying <code>IO</code> object.
* <code>IO.select</code> calls <code>to_io</code> to obtain the file descriptor to wait.
*
* This means that readability notified by <code>IO.select</code> doesn't mean
* readability from <code>OpenSSL::SSL::SSLSocket</code> object.
*
* The most likely situation is that <code>OpenSSL::SSL::SSLSocket</code> buffers some data.
* <code>IO.select</code> doesn't see the buffer.
* So <code>IO.select</code> can block when <code>OpenSSL::SSL::SSLSocket#readpartial</code> doesn't block.
*
* However, several more complicated situations exist.
*
* SSL is a protocol which is sequence of records.
* The record consists of multiple bytes.
* So, the remote side of SSL sends a partial record,
* <code>IO.select</code> notifies readability but
* <code>OpenSSL::SSL::SSLSocket</code> cannot decrypt a byte and
* <code>OpenSSL::SSL::SSLSocket#readpartial</code> will blocks.
*
* Also, the remote side can request SSL renegotiation which forces
* the local SSL engine to write some data.
* This means <code>OpenSSL::SSL::SSLSocket#readpartial</code> may
* invoke <code>write</code> system call and it can block.
* In such a situation, <code>OpenSSL::SSL::SSLSocket#read_nonblock</code>
* raises IO::WaitWritable instead of blocking.
* So, the caller should wait for ready for writability as above example.
*
* The combination of nonblocking methods and <code>IO.select</code> is
* also useful for streams such as tty, pipe socket socket when
* multiple processes read from a stream.
*
* Finally, Linux kernel developers don't guarantee that
* readability of select(2) means readability of following read(2) even
* for a single process.
* See select(2) manual on GNU/Linux system.
*
* Invoking <code>IO.select</code> before <code>IO#readpartial</code> works well as usual.
* However it is not the best way to use <code>IO.select</code>.
*
* The writability notified by select(2) doesn't show
* how many bytes writable.
* <code>IO#write</code> method blocks until given whole string is written.
* So, <code>IO#write(two or more bytes)</code> can block after writability is notified by <code>IO.select</code>.
* <code>IO#write_nonblock</code> is required to avoid the blocking.
*
* Blocking write (<code>write</code>) can be emulated using
* <code>write_nonblock</code> and <code>IO.select</code> as follows:
* IO::WaitReadable should also be rescued for SSL renegotiation in <code>OpenSSL::SSL::SSLSocket</code>.
*
* while 0 < string.bytesize
* begin
* written = io_like.write_nonblock(string)
* rescue IO::WaitReadable
* IO.select([io_like])
* retry
* rescue IO::WaitWritable
* IO.select(nil, [io_like])
* retry
* end
* string = string.byteslice(written..-1)
* end
*
* === Parameters
* read_array:: an array of <code>IO</code> objects that wait until ready for read
* write_array:: an array of <code>IO</code> objects that wait until ready for write
* error_array:: an array of <code>IO</code> objects that wait for exceptions
* timeout:: a numeric value in second
*
* === Example
*
* rp, wp = IO.pipe
* mesg = "ping "
* 100.times {
* # IO.select follows IO#read. Not the best way to use IO.select.
* rs, ws, = IO.select([rp], [wp])
* if r = rs[0]
* ret = r.read(5)
* print ret
* case ret
* when /ping/
* mesg = "pong\n"
* when /pong/
* mesg = "ping "
* end
* end
* if w = ws[0]
* w.write(mesg)
* end
* }
*
* <em>produces:</em>
*
* ping pong
* ping pong
* ping pong
* (snipped)
* ping
*/
static VALUE
rb_f_select(int argc, VALUE *argv, VALUE obj)
{
VALUE timeout;
struct select_args args;
struct timeval timerec;
int i;
rb_scan_args(argc, argv, "13", &args.read, &args.write, &args.except, &timeout);
if (NIL_P(timeout)) {
args.timeout = 0;
}
else {
timerec = rb_time_interval(timeout);
args.timeout = &timerec;
}
for (i = 0; i < numberof(args.fdsets); ++i)
rb_fd_init(&args.fdsets[i]);
return rb_ensure(select_call, (VALUE)&args, select_end, (VALUE)&args);
}
#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
typedef unsigned long ioctl_req_t;
# define NUM2IOCTLREQ(num) NUM2ULONG(num)
#else
typedef int ioctl_req_t;
# define NUM2IOCTLREQ(num) NUM2INT(num)
#endif
#ifdef HAVE_IOCTL
struct ioctl_arg {
int fd;
ioctl_req_t cmd;
long narg;
};
static VALUE
nogvl_ioctl(void *ptr)
{
struct ioctl_arg *arg = ptr;
return (VALUE)ioctl(arg->fd, arg->cmd, arg->narg);
}
static int
do_ioctl(int fd, ioctl_req_t cmd, long narg)
{
int retval;
struct ioctl_arg arg;
arg.fd = fd;
arg.cmd = cmd;
arg.narg = narg;
retval = (int)rb_thread_io_blocking_region(nogvl_ioctl, &arg, fd);
return retval;
}
#endif
#define DEFULT_IOCTL_NARG_LEN (256)
#if defined(__linux__) && defined(_IOC_SIZE)
static long
linux_iocparm_len(ioctl_req_t cmd)
{
long len;
if ((cmd & 0xFFFF0000) == 0) {
/* legacy and unstructured ioctl number. */
return DEFULT_IOCTL_NARG_LEN;
}
len = _IOC_SIZE(cmd);
/* paranoia check for silly drivers which don't keep ioctl convention */
if (len < DEFULT_IOCTL_NARG_LEN)
len = DEFULT_IOCTL_NARG_LEN;
return len;
}
#endif
static long
ioctl_narg_len(ioctl_req_t cmd)
{
long len;
#ifdef IOCPARM_MASK
#ifndef IOCPARM_LEN
#define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
#endif
#endif
#ifdef IOCPARM_LEN
len = IOCPARM_LEN(cmd); /* on BSDish systems we're safe */
#elif defined(__linux__) && defined(_IOC_SIZE)
len = linux_iocparm_len(cmd);
#else
/* otherwise guess at what's safe */
len = DEFULT_IOCTL_NARG_LEN;
#endif
return len;
}
#ifdef HAVE_FCNTL
#ifdef __linux__
typedef long fcntl_arg_t;
#else
/* posix */
typedef int fcntl_arg_t;
#endif
static long
fcntl_narg_len(int cmd)
{
long len;
switch (cmd) {
#ifdef F_DUPFD
case F_DUPFD:
len = sizeof(fcntl_arg_t);
break;
#endif
#ifdef F_DUP2FD /* bsd specific */
case F_DUP2FD:
len = sizeof(int);
break;
#endif
#ifdef F_DUPFD_CLOEXEC /* linux specific */
case F_DUPFD_CLOEXEC:
len = sizeof(fcntl_arg_t);
break;
#endif
#ifdef F_GETFD
case F_GETFD:
len = 1;
break;
#endif
#ifdef F_SETFD
case F_SETFD:
len = sizeof(fcntl_arg_t);
break;
#endif
#ifdef F_GETFL
case F_GETFL:
len = 1;
break;
#endif
#ifdef F_SETFL
case F_SETFL:
len = sizeof(fcntl_arg_t);
break;
#endif
#ifdef F_GETOWN
case F_GETOWN:
len = 1;
break;
#endif
#ifdef F_SETOWN
case F_SETOWN:
len = sizeof(fcntl_arg_t);
break;
#endif
#ifdef F_GETOWN_EX /* linux specific */
case F_GETOWN_EX:
len = sizeof(struct f_owner_ex);
break;
#endif
#ifdef F_SETOWN_EX /* linux specific */
case F_SETOWN_EX:
len = sizeof(struct f_owner_ex);
break;
#endif
#ifdef F_GETLK
case F_GETLK:
len = sizeof(struct flock);
break;
#endif
#ifdef F_SETLK
case F_SETLK:
len = sizeof(struct flock);
break;
#endif
#ifdef F_SETLKW
case F_SETLKW:
len = sizeof(struct flock);
break;
#endif
#ifdef F_READAHEAD /* bsd specific */
case F_READAHEAD:
len = sizeof(int);
break;
#endif
#ifdef F_RDAHEAD /* Darwin specific */
case F_RDAHEAD:
len = sizeof(int);
break;
#endif
#ifdef F_GETSIG /* linux specific */
case F_GETSIG:
len = 1;
break;
#endif
#ifdef F_SETSIG /* linux specific */
case F_SETSIG:
len = sizeof(fcntl_arg_t);
break;
#endif
#ifdef F_GETLEASE /* linux specific */
case F_GETLEASE:
len = 1;
break;
#endif
#ifdef F_SETLEASE /* linux specific */
case F_SETLEASE:
len = sizeof(fcntl_arg_t);
break;
#endif
#ifdef F_NOTIFY /* linux specific */
case F_NOTIFY:
len = sizeof(fcntl_arg_t);
break;
#endif
default:
len = 256;
break;
}
return len;
}
#else /* HAVE_FCNTL */
static long
fcntl_narg_len(int cmd)
{
return 0;
}
#endif /* HAVE_FCNTL */
static long
setup_narg(ioctl_req_t cmd, VALUE *argp, int io_p)
{
long narg = 0;
VALUE arg = *argp;
if (NIL_P(arg) || arg == Qfalse) {
narg = 0;
}
else if (FIXNUM_P(arg)) {
narg = FIX2LONG(arg);
}
else if (arg == Qtrue) {
narg = 1;
}
else {
VALUE tmp = rb_check_string_type(arg);
if (NIL_P(tmp)) {
narg = NUM2LONG(arg);
}
else {
char *ptr;
long len, slen;
*argp = arg = tmp;
if (io_p)
len = ioctl_narg_len(cmd);
else
len = fcntl_narg_len((int)cmd);
rb_str_modify(arg);
slen = RSTRING_LEN(arg);
/* expand for data + sentinel. */
if (slen < len+1) {
rb_str_resize(arg, len+1);
MEMZERO(RSTRING_PTR(arg)+slen, char, len-slen);
slen = len+1;
}
/* a little sanity check here */
ptr = RSTRING_PTR(arg);
ptr[slen - 1] = 17;
narg = (long)(SIGNED_VALUE)ptr;
}
}
return narg;
}
#ifdef HAVE_IOCTL
static VALUE
rb_ioctl(VALUE io, VALUE req, VALUE arg)
{
ioctl_req_t cmd = NUM2IOCTLREQ(req);
rb_io_t *fptr;
long narg;
int retval;
narg = setup_narg(cmd, &arg, 1);
GetOpenFile(io, fptr);
retval = do_ioctl(fptr->fd, cmd, narg);
if (retval < 0) rb_sys_fail_path(fptr->pathv);
if (RB_TYPE_P(arg, T_STRING)) {
char *ptr;
long slen;
RSTRING_GETMEM(arg, ptr, slen);
if (ptr[slen-1] != 17)
rb_raise(rb_eArgError, "return value overflowed string");
ptr[slen-1] = '\0';
}
return INT2NUM(retval);
}
/*
* call-seq:
* ios.ioctl(integer_cmd, arg) -> integer
*
* Provides a mechanism for issuing low-level commands to control or
* query I/O devices. Arguments and results are platform dependent. If
* <i>arg</i> is a number, its value is passed directly. If it is a
* string, it is interpreted as a binary sequence of bytes. On Unix
* platforms, see <code>ioctl(2)</code> for details. Not implemented on
* all platforms.
*/
static VALUE
rb_io_ioctl(int argc, VALUE *argv, VALUE io)
{
VALUE req, arg;
rb_scan_args(argc, argv, "11", &req, &arg);
return rb_ioctl(io, req, arg);
}
#else
#define rb_io_ioctl rb_f_notimplement
#endif
#ifdef HAVE_FCNTL
struct fcntl_arg {
int fd;
int cmd;
long narg;
};
static VALUE
nogvl_fcntl(void *ptr)
{
struct fcntl_arg *arg = ptr;
#if defined(F_DUPFD)
if (arg->cmd == F_DUPFD)
return (VALUE)rb_cloexec_fcntl_dupfd(arg->fd, (int)arg->narg);
#endif
return (VALUE)fcntl(arg->fd, arg->cmd, arg->narg);
}
static int
do_fcntl(int fd, int cmd, long narg)
{
int retval;
struct fcntl_arg arg;
arg.fd = fd;
arg.cmd = cmd;
arg.narg = narg;
retval = (int)rb_thread_io_blocking_region(nogvl_fcntl, &arg, fd);
if (retval != -1) {
switch (cmd) {
#if defined(F_DUPFD)
case F_DUPFD:
#endif
#if defined(F_DUPFD_CLOEXEC)
case F_DUPFD_CLOEXEC:
#endif
rb_update_max_fd(retval);
}
}
return retval;
}
static VALUE
rb_fcntl(VALUE io, VALUE req, VALUE arg)
{
int cmd = NUM2INT(req);
rb_io_t *fptr;
long narg;
int retval;
narg = setup_narg(cmd, &arg, 0);
GetOpenFile(io, fptr);
retval = do_fcntl(fptr->fd, cmd, narg);
if (retval < 0) rb_sys_fail_path(fptr->pathv);
if (RB_TYPE_P(arg, T_STRING)) {
char *ptr;
long slen;
RSTRING_GETMEM(arg, ptr, slen);
if (ptr[slen-1] != 17)
rb_raise(rb_eArgError, "return value overflowed string");
ptr[slen-1] = '\0';
}
return INT2NUM(retval);
}
/*
* call-seq:
* ios.fcntl(integer_cmd, arg) -> integer
*
* Provides a mechanism for issuing low-level commands to control or
* query file-oriented I/O streams. Arguments and results are platform
* dependent. If <i>arg</i> is a number, its value is passed
* directly. If it is a string, it is interpreted as a binary sequence
* of bytes (<code>Array#pack</code> might be a useful way to build this
* string). On Unix platforms, see <code>fcntl(2)</code> for details.
* Not implemented on all platforms.
*/
static VALUE
rb_io_fcntl(int argc, VALUE *argv, VALUE io)
{
VALUE req, arg;
rb_scan_args(argc, argv, "11", &req, &arg);
return rb_fcntl(io, req, arg);
}
#else
#define rb_io_fcntl rb_f_notimplement
#endif
#if defined(HAVE_SYSCALL) || defined(HAVE___SYSCALL)
/*
* call-seq:
* syscall(num [, args...]) -> integer
*
* Calls the operating system function identified by _num_ and
* returns the result of the function or raises SystemCallError if
* it failed.
*
* Arguments for the function can follow _num_. They must be either
* +String+ objects or +Integer+ objects. A +String+ object is passed
* as a pointer to the byte sequence. An +Integer+ object is passed
* as an integer whose bit size is same as a pointer.
* Up to nine parameters may be passed.
*
* The function identified by _num_ is system
* dependent. On some Unix systems, the numbers may be obtained from a
* header file called <code>syscall.h</code>.
*
* syscall 4, 1, "hello\n", 6 # '4' is write(2) on our box
*
* <em>produces:</em>
*
* hello
*
* Calling +syscall+ on a platform which does not have any way to
* an arbitrary system function just fails with NotImplementedError.
*
* *Note:*
* +syscall+ is essentially unsafe and unportable.
* Feel free to shoot your foot.
* The DL (Fiddle) library is preferred for safer and a bit
* more portable programming.
*/
static VALUE
rb_f_syscall(int argc, VALUE *argv)
{
VALUE arg[8];
#if SIZEOF_VOIDP == 8 && defined(HAVE___SYSCALL) && SIZEOF_INT != 8 /* mainly *BSD */
# define SYSCALL __syscall
# define NUM2SYSCALLID(x) NUM2LONG(x)
# define RETVAL2NUM(x) LONG2NUM(x)
# if SIZEOF_LONG == 8
long num, retval = -1;
# elif SIZEOF_LONG_LONG == 8
long long num, retval = -1;
# else
# error ---->> it is asserted that __syscall takes the first argument and returns retval in 64bit signed integer. <<----
# endif
#elif defined(__linux__)
# define SYSCALL syscall
# define NUM2SYSCALLID(x) NUM2LONG(x)
# define RETVAL2NUM(x) LONG2NUM(x)
/*
* Linux man page says, syscall(2) function prototype is below.
*
* int syscall(int number, ...);
*
* But, it's incorrect. Actual one takes and returned long. (see unistd.h)
*/
long num, retval = -1;
#else
# define SYSCALL syscall
# define NUM2SYSCALLID(x) NUM2INT(x)
# define RETVAL2NUM(x) INT2NUM(x)
int num, retval = -1;
#endif
int i;
if (RTEST(ruby_verbose)) {
rb_warning("We plan to remove a syscall function at future release. DL(Fiddle) provides safer alternative.");
}
if (argc == 0)
rb_raise(rb_eArgError, "too few arguments for syscall");
if (argc > numberof(arg))
rb_raise(rb_eArgError, "too many arguments for syscall");
num = NUM2SYSCALLID(argv[0]); ++argv;
for (i = argc - 1; i--; ) {
VALUE v = rb_check_string_type(argv[i]);
if (!NIL_P(v)) {
SafeStringValue(v);
rb_str_modify(v);
arg[i] = (VALUE)StringValueCStr(v);
}
else {
arg[i] = (VALUE)NUM2LONG(argv[i]);
}
}
switch (argc) {
case 1:
retval = SYSCALL(num);
break;
case 2:
retval = SYSCALL(num, arg[0]);
break;
case 3:
retval = SYSCALL(num, arg[0],arg[1]);
break;
case 4:
retval = SYSCALL(num, arg[0],arg[1],arg[2]);
break;
case 5:
retval = SYSCALL(num, arg[0],arg[1],arg[2],arg[3]);
break;
case 6:
retval = SYSCALL(num, arg[0],arg[1],arg[2],arg[3],arg[4]);
break;
case 7:
retval = SYSCALL(num, arg[0],arg[1],arg[2],arg[3],arg[4],arg[5]);
break;
case 8:
retval = SYSCALL(num, arg[0],arg[1],arg[2],arg[3],arg[4],arg[5],arg[6]);
break;
}
if (retval == -1)
rb_sys_fail(0);
return RETVAL2NUM(retval);
#undef SYSCALL
#undef NUM2SYSCALLID
#undef RETVAL2NUM
}
#else
#define rb_f_syscall rb_f_notimplement
#endif
static VALUE
io_new_instance(VALUE args)
{
return rb_class_new_instance(2, (VALUE*)args+1, *(VALUE*)args);
}
static rb_encoding *
find_encoding(VALUE v)
{
rb_encoding *enc = rb_find_encoding(v);
if (!enc) rb_warn("Unsupported encoding %"PRIsVALUE" ignored", v);
return enc;
}
static void
io_encoding_set(rb_io_t *fptr, VALUE v1, VALUE v2, VALUE opt)
{
rb_encoding *enc, *enc2;
int ecflags = fptr->encs.ecflags;
VALUE ecopts, tmp;
if (!NIL_P(v2)) {
enc2 = find_encoding(v1);
tmp = rb_check_string_type(v2);
if (!NIL_P(tmp)) {
if (RSTRING_LEN(tmp) == 1 && RSTRING_PTR(tmp)[0] == '-') {
/* Special case - "-" => no transcoding */
enc = enc2;
enc2 = NULL;
}
else
enc = find_encoding(v2);
if (enc == enc2) {
/* Special case - "-" => no transcoding */
enc2 = NULL;
}
}
else {
enc = find_encoding(v2);
if (enc == enc2) {
/* Special case - "-" => no transcoding */
enc2 = NULL;
}
}
SET_UNIVERSAL_NEWLINE_DECORATOR_IF_ENC2(enc2, ecflags);
ecflags = rb_econv_prepare_options(opt, &ecopts, ecflags);
}
else {
if (NIL_P(v1)) {
/* Set to default encodings */
rb_io_ext_int_to_encs(NULL, NULL, &enc, &enc2, 0);
SET_UNIVERSAL_NEWLINE_DECORATOR_IF_ENC2(enc2, ecflags);
ecopts = Qnil;
}
else {
tmp = rb_check_string_type(v1);
if (!NIL_P(tmp) && rb_enc_asciicompat(enc = rb_enc_get(tmp))) {
parse_mode_enc(RSTRING_PTR(tmp), enc, &enc, &enc2, NULL);
SET_UNIVERSAL_NEWLINE_DECORATOR_IF_ENC2(enc2, ecflags);
ecflags = rb_econv_prepare_options(opt, &ecopts, ecflags);
}
else {
rb_io_ext_int_to_encs(find_encoding(v1), NULL, &enc, &enc2, 0);
SET_UNIVERSAL_NEWLINE_DECORATOR_IF_ENC2(enc2, ecflags);
ecopts = Qnil;
}
}
}
validate_enc_binmode(&fptr->mode, ecflags, enc, enc2);
fptr->encs.enc = enc;
fptr->encs.enc2 = enc2;
fptr->encs.ecflags = ecflags;
fptr->encs.ecopts = ecopts;
clear_codeconv(fptr);
}
struct io_encoding_set_args {
rb_io_t *fptr;
VALUE v1;
VALUE v2;
VALUE opt;
};
static VALUE
io_encoding_set_v(VALUE v)
{
struct io_encoding_set_args *arg = (struct io_encoding_set_args *)v;
io_encoding_set(arg->fptr, arg->v1, arg->v2, arg->opt);
return Qnil;
}
static VALUE
pipe_pair_close(VALUE rw)
{
VALUE *rwp = (VALUE *)rw;
return rb_ensure(io_close, rwp[0], io_close, rwp[1]);
}
/*
* call-seq:
* IO.pipe -> [read_io, write_io]
* IO.pipe(ext_enc) -> [read_io, write_io]
* IO.pipe("ext_enc:int_enc" [, opt]) -> [read_io, write_io]
* IO.pipe(ext_enc, int_enc [, opt]) -> [read_io, write_io]
*
* IO.pipe(...) {|read_io, write_io| ... }
*
* Creates a pair of pipe endpoints (connected to each other) and
* returns them as a two-element array of <code>IO</code> objects:
* <code>[</code> <i>read_io</i>, <i>write_io</i> <code>]</code>.
*
* If a block is given, the block is called and
* returns the value of the block.
* <i>read_io</i> and <i>write_io</i> are sent to the block as arguments.
* If read_io and write_io are not closed when the block exits, they are closed.
* i.e. closing read_io and/or write_io doesn't cause an error.
*
* Not available on all platforms.
*
* If an encoding (encoding name or encoding object) is specified as an optional argument,
* read string from pipe is tagged with the encoding specified.
* If the argument is a colon separated two encoding names "A:B",
* the read string is converted from encoding A (external encoding)
* to encoding B (internal encoding), then tagged with B.
* If two optional arguments are specified, those must be
* encoding objects or encoding names,
* and the first one is the external encoding,
* and the second one is the internal encoding.
* If the external encoding and the internal encoding is specified,
* optional hash argument specify the conversion option.
*
* In the example below, the two processes close the ends of the pipe
* that they are not using. This is not just a cosmetic nicety. The
* read end of a pipe will not generate an end of file condition if
* there are any writers with the pipe still open. In the case of the
* parent process, the <code>rd.read</code> will never return if it
* does not first issue a <code>wr.close</code>.
*
* rd, wr = IO.pipe
*
* if fork
* wr.close
* puts "Parent got: <#{rd.read}>"
* rd.close
* Process.wait
* else
* rd.close
* puts "Sending message to parent"
* wr.write "Hi Dad"
* wr.close
* end
*
* <em>produces:</em>
*
* Sending message to parent
* Parent got: <Hi Dad>
*/
static VALUE
rb_io_s_pipe(int argc, VALUE *argv, VALUE klass)
{
int pipes[2], state;
VALUE r, w, args[3], v1, v2;
VALUE opt;
rb_io_t *fptr, *fptr2;
struct io_encoding_set_args ies_args;
int fmode = 0;
VALUE ret;
argc = rb_scan_args(argc, argv, "02:", &v1, &v2, &opt);
if (rb_pipe(pipes) == -1)
rb_sys_fail(0);
args[0] = klass;
args[1] = INT2NUM(pipes[0]);
args[2] = INT2FIX(O_RDONLY);
r = rb_protect(io_new_instance, (VALUE)args, &state);
if (state) {
close(pipes[0]);
close(pipes[1]);
rb_jump_tag(state);
}
GetOpenFile(r, fptr);
ies_args.fptr = fptr;
ies_args.v1 = v1;
ies_args.v2 = v2;
ies_args.opt = opt;
rb_protect(io_encoding_set_v, (VALUE)&ies_args, &state);
if (state) {
close(pipes[1]);
io_close(r);
rb_jump_tag(state);
}
args[1] = INT2NUM(pipes[1]);
args[2] = INT2FIX(O_WRONLY);
w = rb_protect(io_new_instance, (VALUE)args, &state);
if (state) {
close(pipes[1]);
if (!NIL_P(r)) rb_io_close(r);
rb_jump_tag(state);
}
GetOpenFile(w, fptr2);
rb_io_synchronized(fptr2);
extract_binmode(opt, &fmode);
#if DEFAULT_TEXTMODE
if ((fptr->mode & FMODE_TEXTMODE) && (fmode & FMODE_BINMODE)) {
fptr->mode &= ~FMODE_TEXTMODE;
setmode(fptr->fd, O_BINARY);
}
#if defined(RUBY_TEST_CRLF_ENVIRONMENT) || defined(_WIN32)
if (fptr->encs.ecflags & ECONV_DEFAULT_NEWLINE_DECORATOR) {
fptr->encs.ecflags |= ECONV_UNIVERSAL_NEWLINE_DECORATOR;
}
#endif
#endif
fptr->mode |= fmode;
#if DEFAULT_TEXTMODE
if ((fptr2->mode & FMODE_TEXTMODE) && (fmode & FMODE_BINMODE)) {
fptr2->mode &= ~FMODE_TEXTMODE;
setmode(fptr2->fd, O_BINARY);
}
#endif
fptr2->mode |= fmode;
ret = rb_assoc_new(r, w);
if (rb_block_given_p()) {
VALUE rw[2];
rw[0] = r;
rw[1] = w;
return rb_ensure(rb_yield, ret, pipe_pair_close, (VALUE)rw);
}
return ret;
}
struct foreach_arg {
int argc;
VALUE *argv;
VALUE io;
};
static void
open_key_args(VALUE klass, int argc, VALUE *argv, VALUE opt, struct foreach_arg *arg)
{
VALUE path, v;
VALUE vmode = Qnil, vperm = Qnil;
path = *argv++;
argc--;
FilePathValue(path);
arg->io = 0;
arg->argc = argc;
arg->argv = argv;
if (NIL_P(opt)) {
vmode = INT2NUM(O_RDONLY);
vperm = INT2FIX(0666);
}
else if (!NIL_P(v = rb_hash_aref(opt, sym_open_args))) {
int n;
v = rb_to_array_type(v);
n = RARRAY_LENINT(v);
rb_check_arity(n, 0, 3); /* rb_io_open */
rb_scan_args(n, RARRAY_CONST_PTR(v), "02:", &vmode, &vperm, &opt);
}
arg->io = rb_io_open(klass, path, vmode, vperm, opt);
}
static VALUE
io_s_foreach(struct getline_arg *arg)
{
VALUE str;
while (!NIL_P(str = rb_io_getline_1(arg->rs, arg->limit, arg->chomp, arg->io))) {
rb_lastline_set(str);
rb_yield(str);
}
rb_lastline_set(Qnil);
return Qnil;
}
/*
* call-seq:
* IO.foreach(name, sep=$/ [, getline_args, open_args]) {|line| block } -> nil
* IO.foreach(name, limit [, getline_args, open_args]) {|line| block } -> nil
* IO.foreach(name, sep, limit [, getline_args, open_args]) {|line| block } -> nil
* IO.foreach(...) -> an_enumerator
*
* Executes the block for every line in the named I/O port, where lines
* are separated by <em>sep</em>.
*
* If no block is given, an enumerator is returned instead.
*
* IO.foreach("testfile") {|x| print "GOT ", x }
*
* <em>produces:</em>
*
* GOT This is line one
* GOT This is line two
* GOT This is line three
* GOT And so on...
*
* If the last argument is a hash, it's the keyword argument to open.
* See IO.readlines for details about getline_args.
* And see also IO.read for details about open_args.
*
*/
static VALUE
rb_io_s_foreach(int argc, VALUE *argv, VALUE self)
{
VALUE opt;
int orig_argc = argc;
struct foreach_arg arg;
struct getline_arg garg;
argc = rb_scan_args(argc, argv, "13:", NULL, NULL, NULL, NULL, &opt);
RETURN_ENUMERATOR(self, orig_argc, argv);
extract_getline_args(argc-1, argv+1, &garg);
open_key_args(self, argc, argv, opt, &arg);
if (NIL_P(arg.io)) return Qnil;
extract_getline_opts(opt, &garg);
check_getline_args(&garg.rs, &garg.limit, garg.io = arg.io);
return rb_ensure(io_s_foreach, (VALUE)&garg, rb_io_close, arg.io);
}
static VALUE
io_s_readlines(struct getline_arg *arg)
{
return io_readlines(arg, arg->io);
}
/*
* call-seq:
* IO.readlines(name, sep=$/ [, getline_args, open_args]) -> array
* IO.readlines(name, limit [, getline_args, open_args]) -> array
* IO.readlines(name, sep, limit [, getline_args, open_args]) -> array
*
* Reads the entire file specified by <i>name</i> as individual
* lines, and returns those lines in an array. Lines are separated by
* <i>sep</i>.
*
* a = IO.readlines("testfile")
* a[0] #=> "This is line one\n"
*
* b = IO.readlines("testfile", chomp: true)
* b[0] #=> "This is line one"
*
* If the last argument is a hash, it's the keyword argument to open.
*
* === Options for getline
*
* The options hash accepts the following keys:
*
* :chomp::
* When the optional +chomp+ keyword argument has a true value,
* <code>\n</code>, <code>\r</code>, and <code>\r\n</code>
* will be removed from the end of each line.
*
* See also IO.read for details about open_args.
*/
static VALUE
rb_io_s_readlines(int argc, VALUE *argv, VALUE io)
{
VALUE opt;
struct foreach_arg arg;
struct getline_arg garg;
argc = rb_scan_args(argc, argv, "13:", NULL, NULL, NULL, NULL, &opt);
extract_getline_args(argc-1, argv+1, &garg);
open_key_args(io, argc, argv, opt, &arg);
if (NIL_P(arg.io)) return Qnil;
extract_getline_opts(opt, &garg);
check_getline_args(&garg.rs, &garg.limit, garg.io = arg.io);
return rb_ensure(io_s_readlines, (VALUE)&garg, rb_io_close, arg.io);
}
static VALUE
io_s_read(struct foreach_arg *arg)
{
return io_read(arg->argc, arg->argv, arg->io);
}
struct seek_arg {
VALUE io;
VALUE offset;
int mode;
};
static VALUE
seek_before_access(VALUE argp)
{
struct seek_arg *arg = (struct seek_arg *)argp;
rb_io_binmode(arg->io);
return rb_io_seek(arg->io, arg->offset, arg->mode);
}
/*
* call-seq:
* IO.read(name, [length [, offset]] [, opt] ) -> string
*
* Opens the file, optionally seeks to the given +offset+, then returns
* +length+ bytes (defaulting to the rest of the file). <code>read</code>
* ensures the file is closed before returning.
*
* If +name+ starts with a pipe character (<code>"|"</code>), a subprocess is
* created in the same way as Kernel#open, and its output is returned.
*
* === Options
*
* The options hash accepts the following keys:
*
* :encoding::
* string or encoding
*
* Specifies the encoding of the read string. +:encoding+ will be ignored
* if +length+ is specified. See Encoding.aliases for possible encodings.
*
* :mode::
* string or integer
*
* Specifies the <i>mode</i> argument for open(). It must start
* with an "r", otherwise it will cause an error.
* See IO.new for the list of possible modes.
*
* :open_args::
* array
*
* Specifies arguments for open() as an array. This key can not be used
* in combination with either +:encoding+ or +:mode+.
*
* Examples:
*
* IO.read("testfile") #=> "This is line one\nThis is line two\nThis is line three\nAnd so on...\n"
* IO.read("testfile", 20) #=> "This is line one\nThi"
* IO.read("testfile", 20, 10) #=> "ne one\nThis is line "
* IO.read("binfile", mode: "rb") #=> "\xF7\x00\x00\x0E\x12"
*/
static VALUE
rb_io_s_read(int argc, VALUE *argv, VALUE io)
{
VALUE opt, offset;
struct foreach_arg arg;
argc = rb_scan_args(argc, argv, "13:", NULL, NULL, &offset, NULL, &opt);
open_key_args(io, argc, argv, opt, &arg);
if (NIL_P(arg.io)) return Qnil;
if (!NIL_P(offset)) {
struct seek_arg sarg;
int state = 0;
sarg.io = arg.io;
sarg.offset = offset;
sarg.mode = SEEK_SET;
rb_protect(seek_before_access, (VALUE)&sarg, &state);
if (state) {
rb_io_close(arg.io);
rb_jump_tag(state);
}
if (arg.argc == 2) arg.argc = 1;
}
return rb_ensure(io_s_read, (VALUE)&arg, rb_io_close, arg.io);
}
/*
* call-seq:
* IO.binread(name, [length [, offset]] ) -> string
*
* Opens the file, optionally seeks to the given <i>offset</i>, then returns
* <i>length</i> bytes (defaulting to the rest of the file).
* <code>binread</code> ensures the file is closed before returning.
* The open mode would be "rb:ASCII-8BIT".
*
* IO.binread("testfile") #=> "This is line one\nThis is line two\nThis is line three\nAnd so on...\n"
* IO.binread("testfile", 20) #=> "This is line one\nThi"
* IO.binread("testfile", 20, 10) #=> "ne one\nThis is line "
*/
static VALUE
rb_io_s_binread(int argc, VALUE *argv, VALUE io)
{
VALUE offset;
struct foreach_arg arg;
enum {
fmode = FMODE_READABLE|FMODE_BINMODE,
oflags = O_RDONLY
#ifdef O_BINARY
|O_BINARY
#endif
};
convconfig_t convconfig = {NULL, NULL, 0, Qnil};
rb_scan_args(argc, argv, "12", NULL, NULL, &offset);
FilePathValue(argv[0]);
convconfig.enc = rb_ascii8bit_encoding();
arg.io = rb_io_open_generic(io, argv[0], oflags, fmode, &convconfig, 0);
if (NIL_P(arg.io)) return Qnil;
arg.argv = argv+1;
arg.argc = (argc > 1) ? 1 : 0;
if (!NIL_P(offset)) {
struct seek_arg sarg;
int state = 0;
sarg.io = arg.io;
sarg.offset = offset;
sarg.mode = SEEK_SET;
rb_protect(seek_before_access, (VALUE)&sarg, &state);
if (state) {
rb_io_close(arg.io);
rb_jump_tag(state);
}
}
return rb_ensure(io_s_read, (VALUE)&arg, rb_io_close, arg.io);
}
static VALUE
io_s_write0(struct write_arg *arg)
{
return io_write(arg->io,arg->str,arg->nosync);
}
static VALUE
io_s_write(int argc, VALUE *argv, VALUE klass, int binary)
{
VALUE string, offset, opt;
struct foreach_arg arg;
struct write_arg warg;
rb_scan_args(argc, argv, "21:", NULL, &string, &offset, &opt);
if (NIL_P(opt)) opt = rb_hash_new();
else opt = rb_hash_dup(opt);
if (NIL_P(rb_hash_aref(opt,sym_mode))) {
int mode = O_WRONLY|O_CREAT;
#ifdef O_BINARY
if (binary) mode |= O_BINARY;
#endif
if (NIL_P(offset)) mode |= O_TRUNC;
rb_hash_aset(opt,sym_mode,INT2NUM(mode));
}
open_key_args(klass, argc, argv, opt, &arg);
#ifndef O_BINARY
if (binary) rb_io_binmode_m(arg.io);
#endif
if (NIL_P(arg.io)) return Qnil;
if (!NIL_P(offset)) {
struct seek_arg sarg;
int state = 0;
sarg.io = arg.io;
sarg.offset = offset;
sarg.mode = SEEK_SET;
rb_protect(seek_before_access, (VALUE)&sarg, &state);
if (state) {
rb_io_close(arg.io);
rb_jump_tag(state);
}
}
warg.io = arg.io;
warg.str = string;
warg.nosync = 0;
return rb_ensure(io_s_write0, (VALUE)&warg, rb_io_close, arg.io);
}
/*
* call-seq:
* IO.write(name, string [, offset]) -> integer
* IO.write(name, string [, offset] [, opt]) -> integer
*
* Opens the file, optionally seeks to the given <i>offset</i>, writes
* <i>string</i>, then returns the length written.
* <code>write</code> ensures the file is closed before returning.
* If <i>offset</i> is not given in write mode, the file is truncated.
* Otherwise, it is not truncated.
*
* IO.write("testfile", "0123456789", 20) #=> 10
* # File could contain: "This is line one\nThi0123456789two\nThis is line three\nAnd so on...\n"
* IO.write("testfile", "0123456789") #=> 10
* # File would now read: "0123456789"
*
* If the last argument is a hash, it specifies options for the internal
* open(). It accepts the following keys:
*
* :encoding::
* string or encoding
*
* Specifies the encoding of the read string.
* See Encoding.aliases for possible encodings.
*
* :mode::
* string or integer
*
* Specifies the <i>mode</i> argument for open(). It must start
* with "w", "a", or "r+", otherwise it will cause an error.
* See IO.new for the list of possible modes.
*
* :perm::
* integer
*
* Specifies the <i>perm</i> argument for open().
*
* :open_args::
* array
*
* Specifies arguments for open() as an array.
* This key can not be used in combination with other keys.
*/
static VALUE
rb_io_s_write(int argc, VALUE *argv, VALUE io)
{
return io_s_write(argc, argv, io, 0);
}
/*
* call-seq:
* IO.binwrite(name, string, [offset] ) -> integer
* IO.binwrite(name, string, [offset], open_args ) -> integer
*
* Same as <code>IO.write</code> except opening the file in binary mode
* and ASCII-8BIT encoding ("wb:ASCII-8BIT").
*/
static VALUE
rb_io_s_binwrite(int argc, VALUE *argv, VALUE io)
{
return io_s_write(argc, argv, io, 1);
}
struct copy_stream_struct {
VALUE src;
VALUE dst;
off_t copy_length; /* (off_t)-1 if not specified */
off_t src_offset; /* (off_t)-1 if not specified */
int src_fd;
int dst_fd;
int close_src;
int close_dst;
off_t total;
const char *syserr;
int error_no;
const char *notimp;
rb_fdset_t fds;
VALUE th;
};
static void *
exec_interrupts(void *arg)
{
VALUE th = (VALUE)arg;
rb_thread_execute_interrupts(th);
return NULL;
}
/*
* returns TRUE if the preceding system call was interrupted
* so we can continue. If the thread was interrupted, we
* reacquire the GVL to execute interrupts before continuing.
*/
static int
maygvl_copy_stream_continue_p(int has_gvl, struct copy_stream_struct *stp)
{
switch (errno) {
case EINTR:
#if defined(ERESTART)
case ERESTART:
#endif
if (rb_thread_interrupted(stp->th)) {
if (has_gvl)
rb_thread_execute_interrupts(stp->th);
else
rb_thread_call_with_gvl(exec_interrupts, (void *)stp->th);
}
return TRUE;
}
return FALSE;
}
/* non-Linux poll may not work on all FDs */
#if defined(HAVE_POLL) && defined(__linux__)
# define USE_POLL 1
# define IOWAIT_SYSCALL "poll"
#else
# define IOWAIT_SYSCALL "select"
# define USE_POLL 0
#endif
#if USE_POLL
static int
nogvl_wait_for_single_fd(int fd, short events)
{
struct pollfd fds;
fds.fd = fd;
fds.events = events;
return poll(&fds, 1, -1);
}
static int
maygvl_copy_stream_wait_read(int has_gvl, struct copy_stream_struct *stp)
{
int ret;
do {
if (has_gvl) {
ret = rb_wait_for_single_fd(stp->src_fd, RB_WAITFD_IN, NULL);
}
else {
ret = nogvl_wait_for_single_fd(stp->src_fd, POLLIN);
}
} while (ret == -1 && maygvl_copy_stream_continue_p(has_gvl, stp));
if (ret == -1) {
stp->syserr = "poll";
stp->error_no = errno;
return -1;
}
return 0;
}
#else /* !USE_POLL */
static int
maygvl_select(int has_gvl, int n, rb_fdset_t *rfds, rb_fdset_t *wfds, rb_fdset_t *efds, struct timeval *timeout)
{
if (has_gvl)
return rb_thread_fd_select(n, rfds, wfds, efds, timeout);
else
return rb_fd_select(n, rfds, wfds, efds, timeout);
}
static int
maygvl_copy_stream_wait_read(int has_gvl, struct copy_stream_struct *stp)
{
int ret;
do {
rb_fd_zero(&stp->fds);
rb_fd_set(stp->src_fd, &stp->fds);
ret = maygvl_select(has_gvl, rb_fd_max(&stp->fds), &stp->fds, NULL, NULL, NULL);
} while (ret == -1 && maygvl_copy_stream_continue_p(has_gvl, stp));
if (ret == -1) {
stp->syserr = "select";
stp->error_no = errno;
return -1;
}
return 0;
}
#endif /* !USE_POLL */
static int
nogvl_copy_stream_wait_write(struct copy_stream_struct *stp)
{
int ret;
do {
#if USE_POLL
ret = nogvl_wait_for_single_fd(stp->dst_fd, POLLOUT);
#else
rb_fd_zero(&stp->fds);
rb_fd_set(stp->dst_fd, &stp->fds);
ret = rb_fd_select(rb_fd_max(&stp->fds), NULL, &stp->fds, NULL, NULL);
#endif
} while (ret == -1 && maygvl_copy_stream_continue_p(0, stp));
if (ret == -1) {
stp->syserr = IOWAIT_SYSCALL;
stp->error_no = errno;
return -1;
}
return 0;
}
#if defined __linux__ && defined __NR_copy_file_range
# define USE_COPY_FILE_RANGE
#endif
#ifdef USE_COPY_FILE_RANGE
static ssize_t
simple_copy_file_range(int in_fd, off_t *in_offset, int out_fd, off_t *out_offset, size_t count, unsigned int flags)
{
return syscall(__NR_copy_file_range, in_fd, in_offset, out_fd, out_offset, count, flags);
}
static int
nogvl_copy_file_range(struct copy_stream_struct *stp)
{
struct stat src_stat, dst_stat;
ssize_t ss;
int ret;
off_t copy_length, src_offset, *src_offset_ptr;
ret = fstat(stp->src_fd, &src_stat);
if (ret == -1) {
stp->syserr = "fstat";
stp->error_no = errno;
return -1;
}
if (!S_ISREG(src_stat.st_mode))
return 0;
ret = fstat(stp->dst_fd, &dst_stat);
if (ret == -1) {
stp->syserr = "fstat";
stp->error_no = errno;
return -1;
}
src_offset = stp->src_offset;
if (src_offset != (off_t)-1) {
src_offset_ptr = &src_offset;
}
else {
src_offset_ptr = NULL; /* if src_offset_ptr is NULL, then bytes are read from in_fd starting from the file offset */
}
copy_length = stp->copy_length;
if (copy_length == (off_t)-1) {
if (src_offset == (off_t)-1) {
off_t current_offset;
errno = 0;
current_offset = lseek(stp->src_fd, 0, SEEK_CUR);
if (current_offset == (off_t)-1 && errno) {
stp->syserr = "lseek";
stp->error_no = errno;
return -1;
}
copy_length = src_stat.st_size - current_offset;
}
else {
copy_length = src_stat.st_size - src_offset;
}
}
retry_copy_file_range:
# if SIZEOF_OFF_T > SIZEOF_SIZE_T
/* we are limited by the 32-bit ssize_t return value on 32-bit */
ss = (copy_length > (off_t)SSIZE_MAX) ? SSIZE_MAX : (ssize_t)copy_length;
# else
ss = (ssize_t)copy_length;
# endif
ss = simple_copy_file_range(stp->src_fd, src_offset_ptr, stp->dst_fd, NULL, ss, 0);
if (0 < ss) {
stp->total += ss;
copy_length -= ss;
if (0 < copy_length) {
goto retry_copy_file_range;
}
}
if (ss == -1) {
if (maygvl_copy_stream_continue_p(0, stp)) {
goto retry_copy_file_range;
}
switch (errno) {
case EINVAL:
#ifdef ENOSYS
case ENOSYS:
#endif
#ifdef EXDEV
case EXDEV: /* in_fd and out_fd are not on the same filesystem */
#endif
return 0;
case EAGAIN:
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
if (nogvl_copy_stream_wait_write(stp) == -1)
return -1;
goto retry_copy_file_range;
case EBADF:
{
int e = errno;
int flags = fcntl(stp->dst_fd, F_GETFL);
if (flags != -1 && flags & O_APPEND) {
return 0;
}
errno = e;
}
}
stp->syserr = "copy_file_range";
stp->error_no = errno;
return -1;
}
return 1;
}
#endif
#ifdef HAVE_SENDFILE
# ifdef __linux__
# define USE_SENDFILE
# ifdef HAVE_SYS_SENDFILE_H
# include <sys/sendfile.h>
# endif
static ssize_t
simple_sendfile(int out_fd, int in_fd, off_t *offset, off_t count)
{
return sendfile(out_fd, in_fd, offset, (size_t)count);
}
# elif 0 /* defined(__FreeBSD__) || defined(__DragonFly__) */ || defined(__APPLE__)
/* This runs on FreeBSD8.1 r30210, but sendfiles blocks its execution
* without cpuset -l 0.
*/
# define USE_SENDFILE
static ssize_t
simple_sendfile(int out_fd, int in_fd, off_t *offset, off_t count)
{
int r;
off_t pos = offset ? *offset : lseek(in_fd, 0, SEEK_CUR);
off_t sbytes;
# ifdef __APPLE__
r = sendfile(in_fd, out_fd, pos, &count, NULL, 0);
sbytes = count;
# else
r = sendfile(in_fd, out_fd, pos, (size_t)count, NULL, &sbytes, 0);
# endif
if (r != 0 && sbytes == 0) return -1;
if (offset) {
*offset += sbytes;
}
else {
lseek(in_fd, sbytes, SEEK_CUR);
}
return (ssize_t)sbytes;
}
# endif
#endif
#ifdef USE_SENDFILE
static int
nogvl_copy_stream_sendfile(struct copy_stream_struct *stp)
{
struct stat src_stat, dst_stat;
ssize_t ss;
int ret;
off_t copy_length;
off_t src_offset;
int use_pread;
ret = fstat(stp->src_fd, &src_stat);
if (ret == -1) {
stp->syserr = "fstat";
stp->error_no = errno;
return -1;
}
if (!S_ISREG(src_stat.st_mode))
return 0;
ret = fstat(stp->dst_fd, &dst_stat);
if (ret == -1) {
stp->syserr = "fstat";
stp->error_no = errno;
return -1;
}
#ifndef __linux__
if ((dst_stat.st_mode & S_IFMT) != S_IFSOCK)
return 0;
#endif
src_offset = stp->src_offset;
use_pread = src_offset != (off_t)-1;
copy_length = stp->copy_length;
if (copy_length == (off_t)-1) {
if (use_pread)
copy_length = src_stat.st_size - src_offset;
else {
off_t cur;
errno = 0;
cur = lseek(stp->src_fd, 0, SEEK_CUR);
if (cur == (off_t)-1 && errno) {
stp->syserr = "lseek";
stp->error_no = errno;
return -1;
}
copy_length = src_stat.st_size - cur;
}
}
retry_sendfile:
# if SIZEOF_OFF_T > SIZEOF_SIZE_T
/* we are limited by the 32-bit ssize_t return value on 32-bit */
ss = (copy_length > (off_t)SSIZE_MAX) ? SSIZE_MAX : (ssize_t)copy_length;
# else
ss = (ssize_t)copy_length;
# endif
if (use_pread) {
ss = simple_sendfile(stp->dst_fd, stp->src_fd, &src_offset, ss);
}
else {
ss = simple_sendfile(stp->dst_fd, stp->src_fd, NULL, ss);
}
if (0 < ss) {
stp->total += ss;
copy_length -= ss;
if (0 < copy_length) {
goto retry_sendfile;
}
}
if (ss == -1) {
if (maygvl_copy_stream_continue_p(0, stp))
goto retry_sendfile;
switch (errno) {
case EINVAL:
#ifdef ENOSYS
case ENOSYS:
#endif
return 0;
case EAGAIN:
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
#ifndef __linux__
/*
* Linux requires stp->src_fd to be a mmap-able (regular) file,
* select() reports regular files to always be "ready", so
* there is no need to select() on it.
* Other OSes may have the same limitation for sendfile() which
* allow us to bypass maygvl_copy_stream_wait_read()...
*/
if (maygvl_copy_stream_wait_read(0, stp) == -1)
return -1;
#endif
if (nogvl_copy_stream_wait_write(stp) == -1)
return -1;
goto retry_sendfile;
}
stp->syserr = "sendfile";
stp->error_no = errno;
return -1;
}
return 1;
}
#endif
static ssize_t
maygvl_read(int has_gvl, int fd, void *buf, size_t count)
{
if (has_gvl)
return rb_read_internal(fd, buf, count);
else
return read(fd, buf, count);
}
static ssize_t
maygvl_copy_stream_read(int has_gvl, struct copy_stream_struct *stp, char *buf, size_t len, off_t offset)
{
ssize_t ss;
retry_read:
if (offset == (off_t)-1) {
ss = maygvl_read(has_gvl, stp->src_fd, buf, len);
}
else {
#ifdef HAVE_PREAD
ss = pread(stp->src_fd, buf, len, offset);
#else
stp->notimp = "pread";
return -1;
#endif
}
if (ss == 0) {
return 0;
}
if (ss == -1) {
if (maygvl_copy_stream_continue_p(has_gvl, stp))
goto retry_read;
switch (errno) {
case EAGAIN:
#if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
if (maygvl_copy_stream_wait_read(has_gvl, stp) == -1)
return -1;
goto retry_read;
#ifdef ENOSYS
case ENOSYS:
stp->notimp = "pread";
return -1;
#endif
}
stp->syserr = offset == (off_t)-1 ? "read" : "pread";
stp->error_no = errno;
return -1;
}
return ss;
}
static int
nogvl_copy_stream_write(struct copy_stream_struct *stp, char *buf, size_t len)
{
ssize_t ss;
int off = 0;
while (len) {
ss = write(stp->dst_fd, buf+off, len);
if (ss == -1) {
if (maygvl_copy_stream_continue_p(0, stp))
continue;
if (errno == EAGAIN || errno == EWOULDBLOCK) {
if (nogvl_copy_stream_wait_write(stp) == -1)
return -1;
continue;
}
stp->syserr = "write";
stp->error_no = errno;
return -1;
}
off += (int)ss;
len -= (int)ss;
stp->total += ss;
}
return 0;
}
static void
nogvl_copy_stream_read_write(struct copy_stream_struct *stp)
{
char buf[1024*16];
size_t len;
ssize_t ss;
int ret;
off_t copy_length;
int use_eof;
off_t src_offset;
int use_pread;
copy_length = stp->copy_length;
use_eof = copy_length == (off_t)-1;
src_offset = stp->src_offset;
use_pread = src_offset != (off_t)-1;
if (use_pread && stp->close_src) {
off_t r;
errno = 0;
r = lseek(stp->src_fd, src_offset, SEEK_SET);
if (r == (off_t)-1 && errno) {
stp->syserr = "lseek";
stp->error_no = errno;
return;
}
src_offset = (off_t)-1;
use_pread = 0;
}
while (use_eof || 0 < copy_length) {
if (!use_eof && copy_length < (off_t)sizeof(buf)) {
len = (size_t)copy_length;
}
else {
len = sizeof(buf);
}
if (use_pread) {
ss = maygvl_copy_stream_read(0, stp, buf, len, src_offset);
if (0 < ss)
src_offset += ss;
}
else {
ss = maygvl_copy_stream_read(0, stp, buf, len, (off_t)-1);
}
if (ss <= 0) /* EOF or error */
return;
ret = nogvl_copy_stream_write(stp, buf, ss);
if (ret < 0)
return;
if (!use_eof)
copy_length -= ss;
}
}
static void *
nogvl_copy_stream_func(void *arg)
{
struct copy_stream_struct *stp = (struct copy_stream_struct *)arg;
#ifdef USE_SENDFILE
int ret;
#endif
#ifdef USE_COPY_FILE_RANGE
ret = nogvl_copy_file_range(stp);
if (ret != 0)
goto finish; /* error or success */
#endif
#ifdef USE_SENDFILE
ret = nogvl_copy_stream_sendfile(stp);
if (ret != 0)
goto finish; /* error or success */
#endif
nogvl_copy_stream_read_write(stp);
#ifdef USE_SENDFILE
finish:
#endif
return 0;
}
static VALUE
copy_stream_fallback_body(VALUE arg)
{
struct copy_stream_struct *stp = (struct copy_stream_struct *)arg;
const int buflen = 16*1024;
VALUE n;
VALUE buf = rb_str_buf_new(buflen);
off_t rest = stp->copy_length;
off_t off = stp->src_offset;
ID read_method = id_readpartial;
if (stp->src_fd == -1) {
if (!rb_respond_to(stp->src, read_method)) {
read_method = id_read;
}
}
while (1) {
long numwrote;
long l;
if (stp->copy_length == (off_t)-1) {
l = buflen;
}
else {
if (rest == 0)
break;
l = buflen < rest ? buflen : (long)rest;
}
if (stp->src_fd == -1) {
VALUE rc = rb_funcall(stp->src, read_method, 2, INT2FIX(l), buf);
if (read_method == id_read && NIL_P(rc))
break;
}
else {
ssize_t ss;
rb_str_resize(buf, buflen);
ss = maygvl_copy_stream_read(1, stp, RSTRING_PTR(buf), l, off);
rb_str_resize(buf, ss > 0 ? ss : 0);
if (ss == -1)
return Qnil;
if (ss == 0)
rb_eof_error();
if (off != (off_t)-1)
off += ss;
}
n = rb_io_write(stp->dst, buf);
numwrote = NUM2LONG(n);
stp->total += numwrote;
rest -= numwrote;
if (read_method == id_read && RSTRING_LEN(buf) == 0) {
break;
}
}
return Qnil;
}
static VALUE
copy_stream_fallback(struct copy_stream_struct *stp)
{
if (stp->src_fd == -1 && stp->src_offset != (off_t)-1) {
rb_raise(rb_eArgError, "cannot specify src_offset for non-IO");
}
rb_rescue2(copy_stream_fallback_body, (VALUE)stp,
(VALUE (*) (ANYARGS))0, (VALUE)0,
rb_eEOFError, (VALUE)0);
return Qnil;
}
static VALUE
copy_stream_body(VALUE arg)
{
struct copy_stream_struct *stp = (struct copy_stream_struct *)arg;
VALUE src_io = stp->src, dst_io = stp->dst;
rb_io_t *src_fptr = 0, *dst_fptr = 0;
int src_fd, dst_fd;
const int common_oflags = 0
#ifdef O_NOCTTY
| O_NOCTTY
#endif
;
stp->th = rb_thread_current();
stp->total = 0;
if (src_io == argf ||
!(RB_TYPE_P(src_io, T_FILE) ||
RB_TYPE_P(src_io, T_STRING) ||
rb_respond_to(src_io, rb_intern("to_path")))) {
src_fd = -1;
}
else {
VALUE tmp_io = rb_io_check_io(src_io);
if (!NIL_P(tmp_io)) {
src_io = tmp_io;
}
else if (!RB_TYPE_P(src_io, T_FILE)) {
VALUE args[2];
FilePathValue(src_io);
args[0] = src_io;
args[1] = INT2NUM(O_RDONLY|common_oflags);
src_io = rb_class_new_instance(2, args, rb_cFile);
stp->src = src_io;
stp->close_src = 1;
}
GetOpenFile(src_io, src_fptr);
rb_io_check_byte_readable(src_fptr);
src_fd = src_fptr->fd;
}
stp->src_fd = src_fd;
if (dst_io == argf ||
!(RB_TYPE_P(dst_io, T_FILE) ||
RB_TYPE_P(dst_io, T_STRING) ||
rb_respond_to(dst_io, rb_intern("to_path")))) {
dst_fd = -1;
}
else {
VALUE tmp_io = rb_io_check_io(dst_io);
if (!NIL_P(tmp_io)) {
dst_io = GetWriteIO(tmp_io);
}
else if (!RB_TYPE_P(dst_io, T_FILE)) {
VALUE args[3];
FilePathValue(dst_io);
args[0] = dst_io;
args[1] = INT2NUM(O_WRONLY|O_CREAT|O_TRUNC|common_oflags);
args[2] = INT2FIX(0666);
dst_io = rb_class_new_instance(3, args, rb_cFile);
stp->dst = dst_io;
stp->close_dst = 1;
}
else {
dst_io = GetWriteIO(dst_io);
stp->dst = dst_io;
}
GetOpenFile(dst_io, dst_fptr);
rb_io_check_writable(dst_fptr);
dst_fd = dst_fptr->fd;
}
stp->dst_fd = dst_fd;
#ifdef O_BINARY
if (src_fptr)
SET_BINARY_MODE_WITH_SEEK_CUR(src_fptr);
#endif
if (dst_fptr)
io_ascii8bit_binmode(dst_fptr);
if (stp->src_offset == (off_t)-1 && src_fptr && src_fptr->rbuf.len) {
size_t len = src_fptr->rbuf.len;
VALUE str;
if (stp->copy_length != (off_t)-1 && stp->copy_length < (off_t)len) {
len = (size_t)stp->copy_length;
}
str = rb_str_buf_new(len);
rb_str_resize(str,len);
read_buffered_data(RSTRING_PTR(str), len, src_fptr);
if (dst_fptr) { /* IO or filename */
if (io_binwrite(str, RSTRING_PTR(str), RSTRING_LEN(str), dst_fptr, 0) < 0)
rb_sys_fail(0);
}
else /* others such as StringIO */
rb_io_write(dst_io, str);
stp->total += len;
if (stp->copy_length != (off_t)-1)
stp->copy_length -= len;
}
if (dst_fptr && io_fflush(dst_fptr) < 0) {
rb_raise(rb_eIOError, "flush failed");
}
if (stp->copy_length == 0)
return Qnil;
if (src_fd == -1 || dst_fd == -1) {
return copy_stream_fallback(stp);
}
rb_fd_set(src_fd, &stp->fds);
rb_fd_set(dst_fd, &stp->fds);
rb_thread_call_without_gvl(nogvl_copy_stream_func, (void*)stp, RUBY_UBF_IO, 0);
return Qnil;
}
static VALUE
copy_stream_finalize(VALUE arg)
{
struct copy_stream_struct *stp = (struct copy_stream_struct *)arg;
if (stp->close_src) {
rb_io_close_m(stp->src);
}
if (stp->close_dst) {
rb_io_close_m(stp->dst);
}
rb_fd_term(&stp->fds);
if (stp->syserr) {
rb_syserr_fail(stp->error_no, stp->syserr);
}
if (stp->notimp) {
rb_raise(rb_eNotImpError, "%s() not implemented", stp->notimp);
}
return Qnil;
}
/*
* call-seq:
* IO.copy_stream(src, dst)
* IO.copy_stream(src, dst, copy_length)
* IO.copy_stream(src, dst, copy_length, src_offset)
*
* IO.copy_stream copies <i>src</i> to <i>dst</i>.
* <i>src</i> and <i>dst</i> is either a filename or an IO-like object.
* IO-like object for <i>src</i> should have <code>readpartial</code> or
* <code>read</code> method.
* IO-like object for <i>dst</i> should have <code>write</code> method.
* (Specialized mechanisms, such as sendfile system call, may be used
* on appropriate situation.)
*
* This method returns the number of bytes copied.
*
* If optional arguments are not given,
* the start position of the copy is
* the beginning of the filename or
* the current file offset of the IO.
* The end position of the copy is the end of file.
*
* If <i>copy_length</i> is given,
* No more than <i>copy_length</i> bytes are copied.
*
* If <i>src_offset</i> is given,
* it specifies the start position of the copy.
*
* When <i>src_offset</i> is specified and
* <i>src</i> is an IO,
* IO.copy_stream doesn't move the current file offset.
*
*/
static VALUE
rb_io_s_copy_stream(int argc, VALUE *argv, VALUE io)
{
VALUE src, dst, length, src_offset;
struct copy_stream_struct st;
MEMZERO(&st, struct copy_stream_struct, 1);
rb_scan_args(argc, argv, "22", &src, &dst, &length, &src_offset);
st.src = src;
st.dst = dst;
if (NIL_P(length))
st.copy_length = (off_t)-1;
else
st.copy_length = NUM2OFFT(length);
if (NIL_P(src_offset))
st.src_offset = (off_t)-1;
else
st.src_offset = NUM2OFFT(src_offset);
rb_fd_init(&st.fds);
rb_ensure(copy_stream_body, (VALUE)&st, copy_stream_finalize, (VALUE)&st);
return OFFT2NUM(st.total);
}
/*
* call-seq:
* io.external_encoding -> encoding
*
* Returns the Encoding object that represents the encoding of the file.
* If _io_ is in write mode and no encoding is specified, returns +nil+.
*/
static VALUE
rb_io_external_encoding(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (fptr->encs.enc2) {
return rb_enc_from_encoding(fptr->encs.enc2);
}
if (fptr->mode & FMODE_WRITABLE) {
if (fptr->encs.enc)
return rb_enc_from_encoding(fptr->encs.enc);
return Qnil;
}
return rb_enc_from_encoding(io_read_encoding(fptr));
}
/*
* call-seq:
* io.internal_encoding -> encoding
*
* Returns the Encoding of the internal string if conversion is
* specified. Otherwise returns +nil+.
*/
static VALUE
rb_io_internal_encoding(VALUE io)
{
rb_io_t *fptr;
GetOpenFile(io, fptr);
if (!fptr->encs.enc2) return Qnil;
return rb_enc_from_encoding(io_read_encoding(fptr));
}
/*
* call-seq:
* io.set_encoding(ext_enc) -> io
* io.set_encoding("ext_enc:int_enc") -> io
* io.set_encoding(ext_enc, int_enc) -> io
* io.set_encoding("ext_enc:int_enc", opt) -> io
* io.set_encoding(ext_enc, int_enc, opt) -> io
*
* If single argument is specified, read string from io is tagged
* with the encoding specified. If encoding is a colon separated two
* encoding names "A:B", the read string is converted from encoding A
* (external encoding) to encoding B (internal encoding), then tagged
* with B. If two arguments are specified, those must be encoding
* objects or encoding names, and the first one is the external encoding, and the
* second one is the internal encoding.
* If the external encoding and the internal encoding is specified,
* optional hash argument specify the conversion option.
*/
static VALUE
rb_io_set_encoding(int argc, VALUE *argv, VALUE io)
{
rb_io_t *fptr;
VALUE v1, v2, opt;
if (!RB_TYPE_P(io, T_FILE)) {
return rb_funcallv(io, id_set_encoding, argc, argv);
}
argc = rb_scan_args(argc, argv, "11:", &v1, &v2, &opt);
GetOpenFile(io, fptr);
io_encoding_set(fptr, v1, v2, opt);
return io;
}
void
rb_stdio_set_default_encoding(void)
{
VALUE val = Qnil;
rb_io_set_encoding(1, &val, rb_stdin);
rb_io_set_encoding(1, &val, rb_stdout);
rb_io_set_encoding(1, &val, rb_stderr);
}
static inline int
global_argf_p(VALUE arg)
{
return arg == argf;
}
/*
* call-seq:
* ARGF.external_encoding -> encoding
*
* Returns the external encoding for files read from +ARGF+ as an +Encoding+
* object. The external encoding is the encoding of the text as stored in a
* file. Contrast with +ARGF.internal_encoding+, which is the encoding used
* to represent this text within Ruby.
*
* To set the external encoding use +ARGF.set_encoding+.
*
* For example:
*
* ARGF.external_encoding #=> #<Encoding:UTF-8>
*
*/
static VALUE
argf_external_encoding(VALUE argf)
{
if (!RTEST(ARGF.current_file)) {
return rb_enc_from_encoding(rb_default_external_encoding());
}
return rb_io_external_encoding(rb_io_check_io(ARGF.current_file));
}
/*
* call-seq:
* ARGF.internal_encoding -> encoding
*
* Returns the internal encoding for strings read from +ARGF+ as an
* +Encoding+ object.
*
* If +ARGF.set_encoding+ has been called with two encoding names, the second
* is returned. Otherwise, if +Encoding.default_external+ has been set, that
* value is returned. Failing that, if a default external encoding was
* specified on the command-line, that value is used. If the encoding is
* unknown, +nil+ is returned.
*/
static VALUE
argf_internal_encoding(VALUE argf)
{
if (!RTEST(ARGF.current_file)) {
return rb_enc_from_encoding(rb_default_external_encoding());
}
return rb_io_internal_encoding(rb_io_check_io(ARGF.current_file));
}
/*
* call-seq:
* ARGF.set_encoding(ext_enc) -> ARGF
* ARGF.set_encoding("ext_enc:int_enc") -> ARGF
* ARGF.set_encoding(ext_enc, int_enc) -> ARGF
* ARGF.set_encoding("ext_enc:int_enc", opt) -> ARGF
* ARGF.set_encoding(ext_enc, int_enc, opt) -> ARGF
*
* If single argument is specified, strings read from ARGF are tagged with
* the encoding specified.
*
* If two encoding names separated by a colon are given, e.g. "ascii:utf-8",
* the read string is converted from the first encoding (external encoding)
* to the second encoding (internal encoding), then tagged with the second
* encoding.
*
* If two arguments are specified, they must be encoding objects or encoding
* names. Again, the first specifies the external encoding; the second
* specifies the internal encoding.
*
* If the external encoding and the internal encoding are specified, the
* optional +Hash+ argument can be used to adjust the conversion process. The
* structure of this hash is explained in the String#encode documentation.
*
* For example:
*
* ARGF.set_encoding('ascii') # Tag the input as US-ASCII text
* ARGF.set_encoding(Encoding::UTF_8) # Tag the input as UTF-8 text
* ARGF.set_encoding('utf-8','ascii') # Transcode the input from US-ASCII
* # to UTF-8.
*/
static VALUE
argf_set_encoding(int argc, VALUE *argv, VALUE argf)
{
rb_io_t *fptr;
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream to set encoding");
}
rb_io_set_encoding(argc, argv, ARGF.current_file);
GetOpenFile(ARGF.current_file, fptr);
ARGF.encs = fptr->encs;
return argf;
}
/*
* call-seq:
* ARGF.tell -> Integer
* ARGF.pos -> Integer
*
* Returns the current offset (in bytes) of the current file in +ARGF+.
*
* ARGF.pos #=> 0
* ARGF.gets #=> "This is line one\n"
* ARGF.pos #=> 17
*
*/
static VALUE
argf_tell(VALUE argf)
{
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream to tell");
}
ARGF_FORWARD(0, 0);
return rb_io_tell(ARGF.current_file);
}
/*
* call-seq:
* ARGF.seek(amount, whence=IO::SEEK_SET) -> 0
*
* Seeks to offset _amount_ (an +Integer+) in the +ARGF+ stream according to
* the value of _whence_. See IO#seek for further details.
*/
static VALUE
argf_seek_m(int argc, VALUE *argv, VALUE argf)
{
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream to seek");
}
ARGF_FORWARD(argc, argv);
return rb_io_seek_m(argc, argv, ARGF.current_file);
}
/*
* call-seq:
* ARGF.pos = position -> Integer
*
* Seeks to the position given by _position_ (in bytes) in +ARGF+.
*
* For example:
*
* ARGF.pos = 17
* ARGF.gets #=> "This is line two\n"
*/
static VALUE
argf_set_pos(VALUE argf, VALUE offset)
{
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream to set position");
}
ARGF_FORWARD(1, &offset);
return rb_io_set_pos(ARGF.current_file, offset);
}
/*
* call-seq:
* ARGF.rewind -> 0
*
* Positions the current file to the beginning of input, resetting
* +ARGF.lineno+ to zero.
*
* ARGF.readline #=> "This is line one\n"
* ARGF.rewind #=> 0
* ARGF.lineno #=> 0
* ARGF.readline #=> "This is line one\n"
*/
static VALUE
argf_rewind(VALUE argf)
{
VALUE ret;
int old_lineno;
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream to rewind");
}
ARGF_FORWARD(0, 0);
old_lineno = RFILE(ARGF.current_file)->fptr->lineno;
ret = rb_io_rewind(ARGF.current_file);
if (!global_argf_p(argf)) {
ARGF.last_lineno = ARGF.lineno -= old_lineno;
}
return ret;
}
/*
* call-seq:
* ARGF.fileno -> integer
* ARGF.to_i -> integer
*
* Returns an integer representing the numeric file descriptor for
* the current file. Raises an +ArgumentError+ if there isn't a current file.
*
* ARGF.fileno #=> 3
*/
static VALUE
argf_fileno(VALUE argf)
{
if (!next_argv()) {
rb_raise(rb_eArgError, "no stream");
}
ARGF_FORWARD(0, 0);
return rb_io_fileno(ARGF.current_file);
}
/*
* call-seq:
* ARGF.to_io -> IO
*
* Returns an +IO+ object representing the current file. This will be a
* +File+ object unless the current file is a stream such as STDIN.
*
* For example:
*
* ARGF.to_io #=> #<File:glark.txt>
* ARGF.to_io #=> #<IO:<STDIN>>
*/
static VALUE
argf_to_io(VALUE argf)
{
next_argv();
ARGF_FORWARD(0, 0);
return ARGF.current_file;
}
/*
* call-seq:
* ARGF.eof? -> true or false
* ARGF.eof -> true or false
*
* Returns true if the current file in +ARGF+ is at end of file, i.e. it has
* no data to read. The stream must be opened for reading or an +IOError+
* will be raised.
*
* $ echo "eof" | ruby argf.rb
*
* ARGF.eof? #=> false
* 3.times { ARGF.readchar }
* ARGF.eof? #=> false
* ARGF.readchar #=> "\n"
* ARGF.eof? #=> true
*/
static VALUE
argf_eof(VALUE argf)
{
next_argv();
if (RTEST(ARGF.current_file)) {
if (ARGF.init_p == 0) return Qtrue;
next_argv();
ARGF_FORWARD(0, 0);
if (rb_io_eof(ARGF.current_file)) {
return Qtrue;
}
}
return Qfalse;
}
/*
* call-seq:
* ARGF.read([length [, outbuf]]) -> string, outbuf, or nil
*
* Reads _length_ bytes from ARGF. The files named on the command line
* are concatenated and treated as a single file by this method, so when
* called without arguments the contents of this pseudo file are returned in
* their entirety.
*
* _length_ must be a non-negative integer or +nil+.
*
* If _length_ is a positive integer, +read+ tries to read
* _length_ bytes without any conversion (binary mode).
* It returns +nil+ if an EOF is encountered before anything can be read.
* Fewer than _length_ bytes are returned if an EOF is encountered during
* the read.
* In the case of an integer _length_, the resulting string is always
* in ASCII-8BIT encoding.
*
* If _length_ is omitted or is +nil+, it reads until EOF
* and the encoding conversion is applied, if applicable.
* A string is returned even if EOF is encountered before any data is read.
*
* If _length_ is zero, it returns an empty string (<code>""</code>).
*
* If the optional _outbuf_ argument is present,
* it must reference a String, which will receive the data.
* The _outbuf_ will contain only the received data after the method call
* even if it is not empty at the beginning.
*
* For example:
*
* $ echo "small" > small.txt
* $ echo "large" > large.txt
* $ ./glark.rb small.txt large.txt
*
* ARGF.read #=> "small\nlarge"
* ARGF.read(200) #=> "small\nlarge"
* ARGF.read(2) #=> "sm"
* ARGF.read(0) #=> ""
*
* Note that this method behaves like the fread() function in C.
* This means it retries to invoke read(2) system calls to read data
* with the specified length.
* If you need the behavior like a single read(2) system call,
* consider ARGF#readpartial or ARGF#read_nonblock.
*/
static VALUE
argf_read(int argc, VALUE *argv, VALUE argf)
{
VALUE tmp, str, length;
long len = 0;
rb_scan_args(argc, argv, "02", &length, &str);
if (!NIL_P(length)) {
len = NUM2LONG(argv[0]);
}
if (!NIL_P(str)) {
StringValue(str);
rb_str_resize(str,0);
argv[1] = Qnil;
}
retry:
if (!next_argv()) {
return str;
}
if (ARGF_GENERIC_INPUT_P()) {
tmp = argf_forward(argc, argv, argf);
}
else {
tmp = io_read(argc, argv, ARGF.current_file);
}
if (NIL_P(str)) str = tmp;
else if (!NIL_P(tmp)) rb_str_append(str, tmp);
if (NIL_P(tmp) || NIL_P(length)) {
if (ARGF.next_p != -1) {
argf_close(argf);
ARGF.next_p = 1;
goto retry;
}
}
else if (argc >= 1) {
long slen = RSTRING_LEN(str);
if (slen < len) {
len -= slen;
argv[0] = INT2NUM(len);
goto retry;
}
}
return str;
}
struct argf_call_arg {
int argc;
VALUE *argv;
VALUE argf;
};
static VALUE
argf_forward_call(VALUE arg)
{
struct argf_call_arg *p = (struct argf_call_arg *)arg;
argf_forward(p->argc, p->argv, p->argf);
return Qnil;
}
static VALUE argf_getpartial(int argc, VALUE *argv, VALUE argf, VALUE opts,
int nonblock);
/*
* call-seq:
* ARGF.readpartial(maxlen) -> string
* ARGF.readpartial(maxlen, outbuf) -> outbuf
*
* Reads at most _maxlen_ bytes from the ARGF stream.
*
* If the optional _outbuf_ argument is present,
* it must reference a String, which will receive the data.
* The _outbuf_ will contain only the received data after the method call
* even if it is not empty at the beginning.
*
* It raises <code>EOFError</code> on end of ARGF stream.
* Since ARGF stream is a concatenation of multiple files,
* internally EOF is occur for each file.
* ARGF.readpartial returns empty strings for EOFs except the last one and
* raises <code>EOFError</code> for the last one.
*
*/
static VALUE
argf_readpartial(int argc, VALUE *argv, VALUE argf)
{
return argf_getpartial(argc, argv, argf, Qnil, 0);
}
/*
* call-seq:
* ARGF.read_nonblock(maxlen[, options]) -> string
* ARGF.read_nonblock(maxlen, outbuf[, options]) -> outbuf
*
* Reads at most _maxlen_ bytes from the ARGF stream in non-blocking mode.
*/
static VALUE
argf_read_nonblock(int argc, VALUE *argv, VALUE argf)
{
VALUE opts;
rb_scan_args(argc, argv, "11:", NULL, NULL, &opts);
if (!NIL_P(opts))
argc--;
return argf_getpartial(argc, argv, argf, opts, 1);
}
static VALUE
argf_getpartial(int argc, VALUE *argv, VALUE argf, VALUE opts, int nonblock)
{
VALUE tmp, str, length;
rb_scan_args(argc, argv, "11", &length, &str);
if (!NIL_P(str)) {
StringValue(str);
argv[1] = str;
}
if (!next_argv()) {
if (!NIL_P(str)) {
rb_str_resize(str, 0);
}
rb_eof_error();
}
if (ARGF_GENERIC_INPUT_P()) {
struct argf_call_arg arg;
arg.argc = argc;
arg.argv = argv;
arg.argf = argf;
tmp = rb_rescue2(argf_forward_call, (VALUE)&arg,
RUBY_METHOD_FUNC(0), Qnil, rb_eEOFError, (VALUE)0);
}
else {
tmp = io_getpartial(argc, argv, ARGF.current_file, opts, nonblock);
}
if (NIL_P(tmp)) {
if (ARGF.next_p == -1) {
return io_nonblock_eof(opts);
}
argf_close(argf);
ARGF.next_p = 1;
if (RARRAY_LEN(ARGF.argv) == 0) {
return io_nonblock_eof(opts);
}
if (NIL_P(str))
str = rb_str_new(NULL, 0);
return str;
}
return tmp;
}
/*
* call-seq:
* ARGF.getc -> String or nil
*
* Reads the next character from +ARGF+ and returns it as a +String+. Returns
* +nil+ at the end of the stream.
*
* +ARGF+ treats the files named on the command line as a single file created
* by concatenating their contents. After returning the last character of the
* first file, it returns the first character of the second file, and so on.
*
* For example:
*
* $ echo "foo" > file
* $ ruby argf.rb file
*
* ARGF.getc #=> "f"
* ARGF.getc #=> "o"
* ARGF.getc #=> "o"
* ARGF.getc #=> "\n"
* ARGF.getc #=> nil
* ARGF.getc #=> nil
*/
static VALUE
argf_getc(VALUE argf)
{
VALUE ch;
retry:
if (!next_argv()) return Qnil;
if (ARGF_GENERIC_INPUT_P()) {
ch = rb_funcall3(ARGF.current_file, rb_intern("getc"), 0, 0);
}
else {
ch = rb_io_getc(ARGF.current_file);
}
if (NIL_P(ch) && ARGF.next_p != -1) {
argf_close(argf);
ARGF.next_p = 1;
goto retry;
}
return ch;
}
/*
* call-seq:
* ARGF.getbyte -> Integer or nil
*
* Gets the next 8-bit byte (0..255) from +ARGF+. Returns +nil+ if called at
* the end of the stream.
*
* For example:
*
* $ echo "foo" > file
* $ ruby argf.rb file
*
* ARGF.getbyte #=> 102
* ARGF.getbyte #=> 111
* ARGF.getbyte #=> 111
* ARGF.getbyte #=> 10
* ARGF.getbyte #=> nil
*/
static VALUE
argf_getbyte(VALUE argf)
{
VALUE ch;
retry:
if (!next_argv()) return Qnil;
if (!RB_TYPE_P(ARGF.current_file, T_FILE)) {
ch = rb_funcall3(ARGF.current_file, rb_intern("getbyte"), 0, 0);
}
else {
ch = rb_io_getbyte(ARGF.current_file);
}
if (NIL_P(ch) && ARGF.next_p != -1) {
argf_close(argf);
ARGF.next_p = 1;
goto retry;
}
return ch;
}
/*
* call-seq:
* ARGF.readchar -> String or nil
*
* Reads the next character from +ARGF+ and returns it as a +String+. Raises
* an +EOFError+ after the last character of the last file has been read.
*
* For example:
*
* $ echo "foo" > file
* $ ruby argf.rb file
*
* ARGF.readchar #=> "f"
* ARGF.readchar #=> "o"
* ARGF.readchar #=> "o"
* ARGF.readchar #=> "\n"
* ARGF.readchar #=> end of file reached (EOFError)
*/
static VALUE
argf_readchar(VALUE argf)
{
VALUE ch;
retry:
if (!next_argv()) rb_eof_error();
if (!RB_TYPE_P(ARGF.current_file, T_FILE)) {
ch = rb_funcall3(ARGF.current_file, rb_intern("getc"), 0, 0);
}
else {
ch = rb_io_getc(ARGF.current_file);
}
if (NIL_P(ch) && ARGF.next_p != -1) {
argf_close(argf);
ARGF.next_p = 1;
goto retry;
}
return ch;
}
/*
* call-seq:
* ARGF.readbyte -> Integer
*
* Reads the next 8-bit byte from ARGF and returns it as an +Integer+. Raises
* an +EOFError+ after the last byte of the last file has been read.
*
* For example:
*
* $ echo "foo" > file
* $ ruby argf.rb file
*
* ARGF.readbyte #=> 102
* ARGF.readbyte #=> 111
* ARGF.readbyte #=> 111
* ARGF.readbyte #=> 10
* ARGF.readbyte #=> end of file reached (EOFError)
*/
static VALUE
argf_readbyte(VALUE argf)
{
VALUE c;
NEXT_ARGF_FORWARD(0, 0);
c = argf_getbyte(argf);
if (NIL_P(c)) {
rb_eof_error();
}
return c;
}
#define FOREACH_ARGF() while (next_argv())
static VALUE
argf_block_call_i(RB_BLOCK_CALL_FUNC_ARGLIST(i, argf))
{
const VALUE current = ARGF.current_file;
rb_yield_values2(argc, argv);
if (ARGF.init_p == -1 || current != ARGF.current_file) {
rb_iter_break_value(Qundef);
}
return Qnil;
}
static void
argf_block_call(ID mid, int argc, VALUE *argv, VALUE argf)
{
VALUE ret = rb_block_call(ARGF.current_file, mid, argc, argv, argf_block_call_i, argf);
if (ret != Qundef) ARGF.next_p = 1;
}
static VALUE
argf_block_call_line_i(RB_BLOCK_CALL_FUNC_ARGLIST(i, argf))
{
if (!global_argf_p(argf)) {
ARGF.last_lineno = ++ARGF.lineno;
}
return argf_block_call_i(i, argf, argc, argv, blockarg);
}
static void
argf_block_call_line(ID mid, int argc, VALUE *argv, VALUE argf)
{
VALUE ret = rb_block_call(ARGF.current_file, mid, argc, argv, argf_block_call_line_i, argf);
if (ret != Qundef) ARGF.next_p = 1;
}
/*
* call-seq:
* ARGF.each(sep=$/) {|line| block } -> ARGF
* ARGF.each(sep=$/, limit) {|line| block } -> ARGF
* ARGF.each(...) -> an_enumerator
*
* ARGF.each_line(sep=$/) {|line| block } -> ARGF
* ARGF.each_line(sep=$/, limit) {|line| block } -> ARGF
* ARGF.each_line(...) -> an_enumerator
*
* Returns an enumerator which iterates over each line (separated by _sep_,
* which defaults to your platform's newline character) of each file in
* +ARGV+. If a block is supplied, each line in turn will be yielded to the
* block, otherwise an enumerator is returned.
* The optional _limit_ argument is an +Integer+ specifying the maximum
* length of each line; longer lines will be split according to this limit.
*
* This method allows you to treat the files supplied on the command line as
* a single file consisting of the concatenation of each named file. After
* the last line of the first file has been returned, the first line of the
* second file is returned. The +ARGF.filename+ and +ARGF.lineno+ methods can
* be used to determine the filename and line number, respectively, of the
* current line.
*
* For example, the following code prints out each line of each named file
* prefixed with its line number, displaying the filename once per file:
*
* ARGF.each_line do |line|
* puts ARGF.filename if ARGF.lineno == 1
* puts "#{ARGF.lineno}: #{line}"
* end
*/
static VALUE
argf_each_line(int argc, VALUE *argv, VALUE argf)
{
RETURN_ENUMERATOR(argf, argc, argv);
FOREACH_ARGF() {
argf_block_call_line(rb_intern("each_line"), argc, argv, argf);
}
return argf;
}
/*
* This is a deprecated alias for <code>each_line</code>.
*/
static VALUE
argf_lines(int argc, VALUE *argv, VALUE argf)
{
rb_warn("ARGF#lines is deprecated; use #each_line instead");
if (!rb_block_given_p())
return rb_enumeratorize(argf, ID2SYM(rb_intern("each_line")), argc, argv);
return argf_each_line(argc, argv, argf);
}
/*
* call-seq:
* ARGF.bytes {|byte| block } -> ARGF
* ARGF.bytes -> an_enumerator
*
* ARGF.each_byte {|byte| block } -> ARGF
* ARGF.each_byte -> an_enumerator
*
* Iterates over each byte of each file in +ARGV+.
* A byte is returned as an +Integer+ in the range 0..255.
*
* This method allows you to treat the files supplied on the command line as
* a single file consisting of the concatenation of each named file. After
* the last byte of the first file has been returned, the first byte of the
* second file is returned. The +ARGF.filename+ method can be used to
* determine the filename of the current byte.
*
* If no block is given, an enumerator is returned instead.
*
* For example:
*
* ARGF.bytes.to_a #=> [35, 32, ... 95, 10]
*
*/
static VALUE
argf_each_byte(VALUE argf)
{
RETURN_ENUMERATOR(argf, 0, 0);
FOREACH_ARGF() {
argf_block_call(rb_intern("each_byte"), 0, 0, argf);
}
return argf;
}
/*
* This is a deprecated alias for <code>each_byte</code>.
*/
static VALUE
argf_bytes(VALUE argf)
{
rb_warn("ARGF#bytes is deprecated; use #each_byte instead");
if (!rb_block_given_p())
return rb_enumeratorize(argf, ID2SYM(rb_intern("each_byte")), 0, 0);
return argf_each_byte(argf);
}
/*
* call-seq:
* ARGF.each_char {|char| block } -> ARGF
* ARGF.each_char -> an_enumerator
*
* Iterates over each character of each file in +ARGF+.
*
* This method allows you to treat the files supplied on the command line as
* a single file consisting of the concatenation of each named file. After
* the last character of the first file has been returned, the first
* character of the second file is returned. The +ARGF.filename+ method can
* be used to determine the name of the file in which the current character
* appears.
*
* If no block is given, an enumerator is returned instead.
*/
static VALUE
argf_each_char(VALUE argf)
{
RETURN_ENUMERATOR(argf, 0, 0);
FOREACH_ARGF() {
argf_block_call(rb_intern("each_char"), 0, 0, argf);
}
return argf;
}
/*
* This is a deprecated alias for <code>each_char</code>.
*/
static VALUE
argf_chars(VALUE argf)
{
rb_warn("ARGF#chars is deprecated; use #each_char instead");
if (!rb_block_given_p())
return rb_enumeratorize(argf, ID2SYM(rb_intern("each_char")), 0, 0);
return argf_each_char(argf);
}
/*
* call-seq:
* ARGF.each_codepoint {|codepoint| block } -> ARGF
* ARGF.each_codepoint -> an_enumerator
*
* Iterates over each codepoint of each file in +ARGF+.
*
* This method allows you to treat the files supplied on the command line as
* a single file consisting of the concatenation of each named file. After
* the last codepoint of the first file has been returned, the first
* codepoint of the second file is returned. The +ARGF.filename+ method can
* be used to determine the name of the file in which the current codepoint
* appears.
*
* If no block is given, an enumerator is returned instead.
*/
static VALUE
argf_each_codepoint(VALUE argf)
{
RETURN_ENUMERATOR(argf, 0, 0);
FOREACH_ARGF() {
argf_block_call(rb_intern("each_codepoint"), 0, 0, argf);
}
return argf;
}
/*
* This is a deprecated alias for <code>each_codepoint</code>.
*/
static VALUE
argf_codepoints(VALUE argf)
{
rb_warn("ARGF#codepoints is deprecated; use #each_codepoint instead");
if (!rb_block_given_p())
return rb_enumeratorize(argf, ID2SYM(rb_intern("each_codepoint")), 0, 0);
return argf_each_codepoint(argf);
}
/*
* call-seq:
* ARGF.filename -> String
* ARGF.path -> String
*
* Returns the current filename. "-" is returned when the current file is
* STDIN.
*
* For example:
*
* $ echo "foo" > foo
* $ echo "bar" > bar
* $ echo "glark" > glark
*
* $ ruby argf.rb foo bar glark
*
* ARGF.filename #=> "foo"
* ARGF.read(5) #=> "foo\nb"
* ARGF.filename #=> "bar"
* ARGF.skip
* ARGF.filename #=> "glark"
*/
static VALUE
argf_filename(VALUE argf)
{
next_argv();
return ARGF.filename;
}
static VALUE
argf_filename_getter(ID id, VALUE *var)
{
return argf_filename(*var);
}
/*
* call-seq:
* ARGF.file -> IO or File object
*
* Returns the current file as an +IO+ or +File+ object.
* <code>$stdin</code> is returned when the current file is STDIN.
*
* For example:
*
* $ echo "foo" > foo
* $ echo "bar" > bar
*
* $ ruby argf.rb foo bar
*
* ARGF.file #=> #<File:foo>
* ARGF.read(5) #=> "foo\nb"
* ARGF.file #=> #<File:bar>
*/
static VALUE
argf_file(VALUE argf)
{
next_argv();
return ARGF.current_file;
}
/*
* call-seq:
* ARGF.binmode -> ARGF
*
* Puts +ARGF+ into binary mode. Once a stream is in binary mode, it cannot
* be reset to non-binary mode. This option has the following effects:
*
* * Newline conversion is disabled.
* * Encoding conversion is disabled.
* * Content is treated as ASCII-8BIT.
*/
static VALUE
argf_binmode_m(VALUE argf)
{
ARGF.binmode = 1;
next_argv();
ARGF_FORWARD(0, 0);
rb_io_ascii8bit_binmode(ARGF.current_file);
return argf;
}
/*
* call-seq:
* ARGF.binmode? -> true or false
*
* Returns true if +ARGF+ is being read in binary mode; false otherwise.
* To enable binary mode use +ARGF.binmode+.
*
* For example:
*
* ARGF.binmode? #=> false
* ARGF.binmode
* ARGF.binmode? #=> true
*/
static VALUE
argf_binmode_p(VALUE argf)
{
return ARGF.binmode ? Qtrue : Qfalse;
}
/*
* call-seq:
* ARGF.skip -> ARGF
*
* Sets the current file to the next file in ARGV. If there aren't any more
* files it has no effect.
*
* For example:
*
* $ ruby argf.rb foo bar
* ARGF.filename #=> "foo"
* ARGF.skip
* ARGF.filename #=> "bar"
*/
static VALUE
argf_skip(VALUE argf)
{
if (ARGF.init_p && ARGF.next_p == 0) {
argf_close(argf);
ARGF.next_p = 1;
}
return argf;
}
/*
* call-seq:
* ARGF.close -> ARGF
*
* Closes the current file and skips to the next file in ARGV. If there are
* no more files to open, just closes the current file. +STDIN+ will not be
* closed.
*
* For example:
*
* $ ruby argf.rb foo bar
*
* ARGF.filename #=> "foo"
* ARGF.close
* ARGF.filename #=> "bar"
* ARGF.close
*/
static VALUE
argf_close_m(VALUE argf)
{
next_argv();
argf_close(argf);
if (ARGF.next_p != -1) {
ARGF.next_p = 1;
}
ARGF.lineno = 0;
return argf;
}
/*
* call-seq:
* ARGF.closed? -> true or false
*
* Returns _true_ if the current file has been closed; _false_ otherwise. Use
* +ARGF.close+ to actually close the current file.
*/
static VALUE
argf_closed(VALUE argf)
{
next_argv();
ARGF_FORWARD(0, 0);
return rb_io_closed(ARGF.current_file);
}
/*
* call-seq:
* ARGF.to_s -> String
*
* Returns "ARGF".
*/
static VALUE
argf_to_s(VALUE argf)
{
return rb_str_new2("ARGF");
}
/*
* call-seq:
* ARGF.inplace_mode -> String
*
* Returns the file extension appended to the names of modified files under
* in-place edit mode. This value can be set using +ARGF.inplace_mode=+ or
* passing the +-i+ switch to the Ruby binary.
*/
static VALUE
argf_inplace_mode_get(VALUE argf)
{
if (!ARGF.inplace) return Qnil;
if (NIL_P(ARGF.inplace)) return rb_str_new(0, 0);
return rb_str_dup(ARGF.inplace);
}
static VALUE
opt_i_get(ID id, VALUE *var)
{
return argf_inplace_mode_get(*var);
}
/*
* call-seq:
* ARGF.inplace_mode = ext -> ARGF
*
* Sets the filename extension for in-place editing mode to the given String.
* Each file being edited has this value appended to its filename. The
* modified file is saved under this new name.
*
* For example:
*
* $ ruby argf.rb file.txt
*
* ARGF.inplace_mode = '.bak'
* ARGF.each_line do |line|
* print line.sub("foo","bar")
* end
*
* Each line of _file.txt_ has the first occurrence of "foo" replaced with
* "bar", then the new line is written out to _file.txt.bak_.
*/
static VALUE
argf_inplace_mode_set(VALUE argf, VALUE val)
{
if (rb_safe_level() >= 1 && OBJ_TAINTED(val))
rb_insecure_operation();
if (!RTEST(val)) {
ARGF.inplace = Qfalse;
}
else if (StringValueCStr(val), !RSTRING_LEN(val)) {
ARGF.inplace = Qnil;
}
else {
ARGF.inplace = rb_str_new_frozen(val);
}
return argf;
}
static void
opt_i_set(VALUE val, ID id, VALUE *var)
{
argf_inplace_mode_set(*var, val);
}
const char *
ruby_get_inplace_mode(void)
{
return RSTRING_PTR(ARGF.inplace);
}
void
ruby_set_inplace_mode(const char *suffix)
{
ARGF.inplace = !suffix ? Qfalse : !*suffix ? Qnil : rb_fstring_cstr(suffix);
}
/*
* call-seq:
* ARGF.argv -> ARGV
*
* Returns the +ARGV+ array, which contains the arguments passed to your
* script, one per element.
*
* For example:
*
* $ ruby argf.rb -v glark.txt
*
* ARGF.argv #=> ["-v", "glark.txt"]
*
*/
static VALUE
argf_argv(VALUE argf)
{
return ARGF.argv;
}
static VALUE
argf_argv_getter(ID id, VALUE *var)
{
return argf_argv(*var);
}
VALUE
rb_get_argv(void)
{
return ARGF.argv;
}
/*
* call-seq:
* ARGF.to_write_io -> io
*
* Returns IO instance tied to _ARGF_ for writing if inplace mode is
* enabled.
*/
static VALUE
argf_write_io(VALUE argf)
{
if (!RTEST(ARGF.current_file)) {
rb_raise(rb_eIOError, "not opened for writing");
}
return GetWriteIO(ARGF.current_file);
}
/*
* call-seq:
* ARGF.write(string) -> integer
*
* Writes _string_ if inplace mode.
*/
static VALUE
argf_write(VALUE argf, VALUE str)
{
return rb_io_write(argf_write_io(argf), str);
}
void
rb_readwrite_sys_fail(enum rb_io_wait_readwrite writable, const char *mesg)
{
rb_readwrite_syserr_fail(writable, errno, mesg);
}
void
rb_readwrite_syserr_fail(enum rb_io_wait_readwrite writable, int n, const char *mesg)
{
VALUE arg;
arg = mesg ? rb_str_new2(mesg) : Qnil;
if (writable == RB_IO_WAIT_WRITABLE) {
switch (n) {
case EAGAIN:
rb_exc_raise(rb_class_new_instance(1, &arg, rb_eEAGAINWaitWritable));
break;
#if EAGAIN != EWOULDBLOCK
case EWOULDBLOCK:
rb_exc_raise(rb_class_new_instance(1, &arg, rb_eEWOULDBLOCKWaitWritable));
break;
#endif
case EINPROGRESS:
rb_exc_raise(rb_class_new_instance(1, &arg, rb_eEINPROGRESSWaitWritable));
break;
default:
rb_mod_sys_fail_str(rb_mWaitWritable, arg);
}
}
else if (writable == RB_IO_WAIT_READABLE) {
switch (n) {
case EAGAIN:
rb_exc_raise(rb_class_new_instance(1, &arg, rb_eEAGAINWaitReadable));
break;
#if EAGAIN != EWOULDBLOCK
case EWOULDBLOCK:
rb_exc_raise(rb_class_new_instance(1, &arg, rb_eEWOULDBLOCKWaitReadable));
break;
#endif
case EINPROGRESS:
rb_exc_raise(rb_class_new_instance(1, &arg, rb_eEINPROGRESSWaitReadable));
break;
default:
rb_mod_sys_fail_str(rb_mWaitReadable, arg);
}
}
else {
rb_bug("invalid read/write type passed to rb_readwrite_sys_fail: %d", writable);
}
}
/*
* Document-class: IOError
*
* Raised when an IO operation fails.
*
* File.open("/etc/hosts") {|f| f << "example"}
* #=> IOError: not opened for writing
*
* File.open("/etc/hosts") {|f| f.close; f.read }
* #=> IOError: closed stream
*
* Note that some IO failures raise <code>SystemCallError</code>s
* and these are not subclasses of IOError:
*
* File.open("does/not/exist")
* #=> Errno::ENOENT: No such file or directory - does/not/exist
*/
/*
* Document-class: EOFError
*
* Raised by some IO operations when reaching the end of file. Many IO
* methods exist in two forms,
*
* one that returns +nil+ when the end of file is reached, the other
* raises +EOFError+.
*
* +EOFError+ is a subclass of +IOError+.
*
* file = File.open("/etc/hosts")
* file.read
* file.gets #=> nil
* file.readline #=> EOFError: end of file reached
*/
/*
* Document-class: ARGF
*
* +ARGF+ is a stream designed for use in scripts that process files given as
* command-line arguments or passed in via STDIN.
*
* The arguments passed to your script are stored in the +ARGV+ Array, one
* argument per element. +ARGF+ assumes that any arguments that aren't
* filenames have been removed from +ARGV+. For example:
*
* $ ruby argf.rb --verbose file1 file2
*
* ARGV #=> ["--verbose", "file1", "file2"]
* option = ARGV.shift #=> "--verbose"
* ARGV #=> ["file1", "file2"]
*
* You can now use +ARGF+ to work with a concatenation of each of these named
* files. For instance, +ARGF.read+ will return the contents of _file1_
* followed by the contents of _file2_.
*
* After a file in +ARGV+ has been read +ARGF+ removes it from the Array.
* Thus, after all files have been read +ARGV+ will be empty.
*
* You can manipulate +ARGV+ yourself to control what +ARGF+ operates on. If
* you remove a file from +ARGV+, it is ignored by +ARGF+; if you add files to
* +ARGV+, they are treated as if they were named on the command line. For
* example:
*
* ARGV.replace ["file1"]
* ARGF.readlines # Returns the contents of file1 as an Array
* ARGV #=> []
* ARGV.replace ["file2", "file3"]
* ARGF.read # Returns the contents of file2 and file3
*
* If +ARGV+ is empty, +ARGF+ acts as if it contained STDIN, i.e. the data
* piped to your script. For example:
*
* $ echo "glark" | ruby -e 'p ARGF.read'
* "glark\n"
*/
/*
* The IO class is the basis for all input and output in Ruby.
* An I/O stream may be <em>duplexed</em> (that is, bidirectional), and
* so may use more than one native operating system stream.
*
* Many of the examples in this section use the File class, the only standard
* subclass of IO. The two classes are closely associated. Like the File
* class, the Socket library subclasses from IO (such as TCPSocket or
* UDPSocket).
*
* The Kernel#open method can create an IO (or File) object for these types
* of arguments:
*
* * A plain string represents a filename suitable for the underlying
* operating system.
*
* * A string starting with <code>"|"</code> indicates a subprocess.
* The remainder of the string following the <code>"|"</code> is
* invoked as a process with appropriate input/output channels
* connected to it.
*
* * A string equal to <code>"|-"</code> will create another Ruby
* instance as a subprocess.
*
* The IO may be opened with different file modes (read-only, write-only) and
* encodings for proper conversion. See IO.new for these options. See
* Kernel#open for details of the various command formats described above.
*
* IO.popen, the Open3 library, or Process#spawn may also be used to
* communicate with subprocesses through an IO.
*
* Ruby will convert pathnames between different operating system
* conventions if possible. For instance, on a Windows system the
* filename <code>"/gumby/ruby/test.rb"</code> will be opened as
* <code>"\gumby\ruby\test.rb"</code>. When specifying a Windows-style
* filename in a Ruby string, remember to escape the backslashes:
*
* "C:\\gumby\\ruby\\test.rb"
*
* Our examples here will use the Unix-style forward slashes;
* File::ALT_SEPARATOR can be used to get the platform-specific separator
* character.
*
* The global constant ARGF (also accessible as <code>$<</code>) provides an
* IO-like stream which allows access to all files mentioned on the
* command line (or STDIN if no files are mentioned). ARGF#path and its alias
* ARGF#filename are provided to access the name of the file currently being
* read.
*
* == io/console
*
* The io/console extension provides methods for interacting with the
* console. The console can be accessed from IO.console or the standard
* input/output/error IO objects.
*
* Requiring io/console adds the following methods:
*
* * IO::console
* * IO#raw
* * IO#raw!
* * IO#cooked
* * IO#cooked!
* * IO#getch
* * IO#echo=
* * IO#echo?
* * IO#noecho
* * IO#winsize
* * IO#winsize=
* * IO#iflush
* * IO#ioflush
* * IO#oflush
*
* Example:
*
* require 'io/console'
* rows, columns = $stdout.winsize
* puts "Your screen is #{columns} wide and #{rows} tall"
*/
void
Init_IO(void)
{
#undef rb_intern
#define rb_intern(str) rb_intern_const(str)
VALUE rb_cARGF;
#ifdef __CYGWIN__
#include <sys/cygwin.h>
static struct __cygwin_perfile pf[] =
{
{"", O_RDONLY | O_BINARY},
{"", O_WRONLY | O_BINARY},
{"", O_RDWR | O_BINARY},
{"", O_APPEND | O_BINARY},
{NULL, 0}
};
cygwin_internal(CW_PERFILE, pf);
#endif
rb_eIOError = rb_define_class("IOError", rb_eStandardError);
rb_eEOFError = rb_define_class("EOFError", rb_eIOError);
id_write = rb_intern("write");
id_read = rb_intern("read");
id_getc = rb_intern("getc");
id_flush = rb_intern("flush");
id_readpartial = rb_intern("readpartial");
id_set_encoding = rb_intern("set_encoding");
rb_define_global_function("syscall", rb_f_syscall, -1);
rb_define_global_function("open", rb_f_open, -1);
rb_define_global_function("printf", rb_f_printf, -1);
rb_define_global_function("print", rb_f_print, -1);
rb_define_global_function("putc", rb_f_putc, 1);
rb_define_global_function("puts", rb_f_puts, -1);
rb_define_global_function("gets", rb_f_gets, -1);
rb_define_global_function("readline", rb_f_readline, -1);
rb_define_global_function("select", rb_f_select, -1);
rb_define_global_function("readlines", rb_f_readlines, -1);
rb_define_global_function("`", rb_f_backquote, 1);
rb_define_global_function("p", rb_f_p, -1);
rb_define_method(rb_mKernel, "display", rb_obj_display, -1);
rb_cIO = rb_define_class("IO", rb_cObject);
rb_include_module(rb_cIO, rb_mEnumerable);
rb_mWaitReadable = rb_define_module_under(rb_cIO, "WaitReadable");
rb_mWaitWritable = rb_define_module_under(rb_cIO, "WaitWritable");
rb_eEAGAINWaitReadable = rb_define_class_under(rb_cIO, "EAGAINWaitReadable", rb_eEAGAIN);
rb_include_module(rb_eEAGAINWaitReadable, rb_mWaitReadable);
rb_eEAGAINWaitWritable = rb_define_class_under(rb_cIO, "EAGAINWaitWritable", rb_eEAGAIN);
rb_include_module(rb_eEAGAINWaitWritable, rb_mWaitWritable);
#if EAGAIN == EWOULDBLOCK
rb_eEWOULDBLOCKWaitReadable = rb_eEAGAINWaitReadable;
/* same as IO::EAGAINWaitReadable */
rb_define_const(rb_cIO, "EWOULDBLOCKWaitReadable", rb_eEAGAINWaitReadable);
rb_eEWOULDBLOCKWaitWritable = rb_eEAGAINWaitWritable;
/* same as IO::EAGAINWaitWritable */
rb_define_const(rb_cIO, "EWOULDBLOCKWaitWritable", rb_eEAGAINWaitWritable);
#else
rb_eEWOULDBLOCKWaitReadable = rb_define_class_under(rb_cIO, "EWOULDBLOCKWaitReadable", rb_eEWOULDBLOCK);
rb_include_module(rb_eEWOULDBLOCKWaitReadable, rb_mWaitReadable);
rb_eEWOULDBLOCKWaitWritable = rb_define_class_under(rb_cIO, "EWOULDBLOCKWaitWritable", rb_eEWOULDBLOCK);
rb_include_module(rb_eEWOULDBLOCKWaitWritable, rb_mWaitWritable);
#endif
rb_eEINPROGRESSWaitReadable = rb_define_class_under(rb_cIO, "EINPROGRESSWaitReadable", rb_eEINPROGRESS);
rb_include_module(rb_eEINPROGRESSWaitReadable, rb_mWaitReadable);
rb_eEINPROGRESSWaitWritable = rb_define_class_under(rb_cIO, "EINPROGRESSWaitWritable", rb_eEINPROGRESS);
rb_include_module(rb_eEINPROGRESSWaitWritable, rb_mWaitWritable);
#if 0
/* This is necessary only for forcing rdoc handle File::open */
rb_define_singleton_method(rb_cFile, "open", rb_io_s_open, -1);
#endif
rb_define_alloc_func(rb_cIO, io_alloc);
rb_define_singleton_method(rb_cIO, "new", rb_io_s_new, -1);
rb_define_singleton_method(rb_cIO, "open", rb_io_s_open, -1);
rb_define_singleton_method(rb_cIO, "sysopen", rb_io_s_sysopen, -1);
rb_define_singleton_method(rb_cIO, "for_fd", rb_io_s_for_fd, -1);
rb_define_singleton_method(rb_cIO, "popen", rb_io_s_popen, -1);
rb_define_singleton_method(rb_cIO, "foreach", rb_io_s_foreach, -1);
rb_define_singleton_method(rb_cIO, "readlines", rb_io_s_readlines, -1);
rb_define_singleton_method(rb_cIO, "read", rb_io_s_read, -1);
rb_define_singleton_method(rb_cIO, "binread", rb_io_s_binread, -1);
rb_define_singleton_method(rb_cIO, "write", rb_io_s_write, -1);
rb_define_singleton_method(rb_cIO, "binwrite", rb_io_s_binwrite, -1);
rb_define_singleton_method(rb_cIO, "select", rb_f_select, -1);
rb_define_singleton_method(rb_cIO, "pipe", rb_io_s_pipe, -1);
rb_define_singleton_method(rb_cIO, "try_convert", rb_io_s_try_convert, 1);
rb_define_singleton_method(rb_cIO, "copy_stream", rb_io_s_copy_stream, -1);
rb_define_method(rb_cIO, "initialize", rb_io_initialize, -1);
rb_output_fs = Qnil;
rb_define_hooked_variable("$,", &rb_output_fs, 0, rb_str_setter);
rb_default_rs = rb_fstring_cstr("\n"); /* avoid modifying RS_default */
rb_gc_register_mark_object(rb_default_rs);
rb_rs = rb_default_rs;
rb_output_rs = Qnil;
rb_define_hooked_variable("$/", &rb_rs, 0, rb_str_setter);
rb_define_hooked_variable("$-0", &rb_rs, 0, rb_str_setter);
rb_define_hooked_variable("$\\", &rb_output_rs, 0, rb_str_setter);
rb_define_virtual_variable("$_", rb_lastline_get, rb_lastline_set);
rb_define_method(rb_cIO, "initialize_copy", rb_io_init_copy, 1);
rb_define_method(rb_cIO, "reopen", rb_io_reopen, -1);
rb_define_method(rb_cIO, "print", rb_io_print, -1);
rb_define_method(rb_cIO, "putc", rb_io_putc, 1);
rb_define_method(rb_cIO, "puts", rb_io_puts, -1);
rb_define_method(rb_cIO, "printf", rb_io_printf, -1);
rb_define_method(rb_cIO, "each", rb_io_each_line, -1);
rb_define_method(rb_cIO, "each_line", rb_io_each_line, -1);
rb_define_method(rb_cIO, "each_byte", rb_io_each_byte, 0);
rb_define_method(rb_cIO, "each_char", rb_io_each_char, 0);
rb_define_method(rb_cIO, "each_codepoint", rb_io_each_codepoint, 0);
rb_define_method(rb_cIO, "lines", rb_io_lines, -1);
rb_define_method(rb_cIO, "bytes", rb_io_bytes, 0);
rb_define_method(rb_cIO, "chars", rb_io_chars, 0);
rb_define_method(rb_cIO, "codepoints", rb_io_codepoints, 0);
rb_define_method(rb_cIO, "syswrite", rb_io_syswrite, 1);
rb_define_method(rb_cIO, "sysread", rb_io_sysread, -1);
rb_define_method(rb_cIO, "pread", rb_io_pread, -1);
rb_define_method(rb_cIO, "pwrite", rb_io_pwrite, 2);
rb_define_method(rb_cIO, "fileno", rb_io_fileno, 0);
rb_define_alias(rb_cIO, "to_i", "fileno");
rb_define_method(rb_cIO, "to_io", rb_io_to_io, 0);
rb_define_method(rb_cIO, "fsync", rb_io_fsync, 0);
rb_define_method(rb_cIO, "fdatasync", rb_io_fdatasync, 0);
rb_define_method(rb_cIO, "sync", rb_io_sync, 0);
rb_define_method(rb_cIO, "sync=", rb_io_set_sync, 1);
rb_define_method(rb_cIO, "lineno", rb_io_lineno, 0);
rb_define_method(rb_cIO, "lineno=", rb_io_set_lineno, 1);
rb_define_method(rb_cIO, "readlines", rb_io_readlines, -1);
/* for prelude.rb use only: */
rb_define_private_method(rb_cIO, "__read_nonblock", io_read_nonblock, 3);
rb_define_private_method(rb_cIO, "__write_nonblock", io_write_nonblock, 2);
rb_define_method(rb_cIO, "readpartial", io_readpartial, -1);
rb_define_method(rb_cIO, "read", io_read, -1);
rb_define_method(rb_cIO, "write", io_write_m, -1);
rb_define_method(rb_cIO, "gets", rb_io_gets_m, -1);
rb_define_method(rb_cIO, "readline", rb_io_readline, -1);
rb_define_method(rb_cIO, "getc", rb_io_getc, 0);
rb_define_method(rb_cIO, "getbyte", rb_io_getbyte, 0);
rb_define_method(rb_cIO, "readchar", rb_io_readchar, 0);
rb_define_method(rb_cIO, "readbyte", rb_io_readbyte, 0);
rb_define_method(rb_cIO, "ungetbyte",rb_io_ungetbyte, 1);
rb_define_method(rb_cIO, "ungetc",rb_io_ungetc, 1);
rb_define_method(rb_cIO, "<<", rb_io_addstr, 1);
rb_define_method(rb_cIO, "flush", rb_io_flush, 0);
rb_define_method(rb_cIO, "tell", rb_io_tell, 0);
rb_define_method(rb_cIO, "seek", rb_io_seek_m, -1);
/* Set I/O position from the beginning */
rb_define_const(rb_cIO, "SEEK_SET", INT2FIX(SEEK_SET));
/* Set I/O position from the current position */
rb_define_const(rb_cIO, "SEEK_CUR", INT2FIX(SEEK_CUR));
/* Set I/O position from the end */
rb_define_const(rb_cIO, "SEEK_END", INT2FIX(SEEK_END));
#ifdef SEEK_DATA
/* Set I/O position to the next location containing data */
rb_define_const(rb_cIO, "SEEK_DATA", INT2FIX(SEEK_DATA));
#endif
#ifdef SEEK_HOLE
/* Set I/O position to the next hole */
rb_define_const(rb_cIO, "SEEK_HOLE", INT2FIX(SEEK_HOLE));
#endif
rb_define_method(rb_cIO, "rewind", rb_io_rewind, 0);
rb_define_method(rb_cIO, "pos", rb_io_tell, 0);
rb_define_method(rb_cIO, "pos=", rb_io_set_pos, 1);
rb_define_method(rb_cIO, "eof", rb_io_eof, 0);
rb_define_method(rb_cIO, "eof?", rb_io_eof, 0);
rb_define_method(rb_cIO, "close_on_exec?", rb_io_close_on_exec_p, 0);
rb_define_method(rb_cIO, "close_on_exec=", rb_io_set_close_on_exec, 1);
rb_define_method(rb_cIO, "close", rb_io_close_m, 0);
rb_define_method(rb_cIO, "closed?", rb_io_closed, 0);
rb_define_method(rb_cIO, "close_read", rb_io_close_read, 0);
rb_define_method(rb_cIO, "close_write", rb_io_close_write, 0);
rb_define_method(rb_cIO, "isatty", rb_io_isatty, 0);
rb_define_method(rb_cIO, "tty?", rb_io_isatty, 0);
rb_define_method(rb_cIO, "binmode", rb_io_binmode_m, 0);
rb_define_method(rb_cIO, "binmode?", rb_io_binmode_p, 0);
rb_define_method(rb_cIO, "sysseek", rb_io_sysseek, -1);
rb_define_method(rb_cIO, "advise", rb_io_advise, -1);
rb_define_method(rb_cIO, "ioctl", rb_io_ioctl, -1);
rb_define_method(rb_cIO, "fcntl", rb_io_fcntl, -1);
rb_define_method(rb_cIO, "pid", rb_io_pid, 0);
rb_define_method(rb_cIO, "inspect", rb_io_inspect, 0);
rb_define_method(rb_cIO, "external_encoding", rb_io_external_encoding, 0);
rb_define_method(rb_cIO, "internal_encoding", rb_io_internal_encoding, 0);
rb_define_method(rb_cIO, "set_encoding", rb_io_set_encoding, -1);
rb_define_method(rb_cIO, "autoclose?", rb_io_autoclose_p, 0);
rb_define_method(rb_cIO, "autoclose=", rb_io_set_autoclose, 1);
rb_define_variable("$stdin", &rb_stdin);
rb_stdin = prep_stdio(stdin, FMODE_READABLE, rb_cIO, "<STDIN>");
rb_define_hooked_variable("$stdout", &rb_stdout, 0, stdout_setter);
rb_stdout = prep_stdio(stdout, FMODE_WRITABLE, rb_cIO, "<STDOUT>");
rb_define_hooked_variable("$stderr", &rb_stderr, 0, stdout_setter);
rb_stderr = prep_stdio(stderr, FMODE_WRITABLE|FMODE_SYNC, rb_cIO, "<STDERR>");
rb_define_hooked_variable("$>", &rb_stdout, 0, stdout_setter);
orig_stdout = rb_stdout;
orig_stderr = rb_stderr;
/* Holds the original stdin */
rb_define_global_const("STDIN", rb_stdin);
/* Holds the original stdout */
rb_define_global_const("STDOUT", rb_stdout);
/* Holds the original stderr */
rb_define_global_const("STDERR", rb_stderr);
#if 0
/* Hack to get rdoc to regard ARGF as a class: */
rb_cARGF = rb_define_class("ARGF", rb_cObject);
#endif
rb_cARGF = rb_class_new(rb_cObject);
rb_set_class_path(rb_cARGF, rb_cObject, "ARGF.class");
rb_define_alloc_func(rb_cARGF, argf_alloc);
rb_include_module(rb_cARGF, rb_mEnumerable);
rb_define_method(rb_cARGF, "initialize", argf_initialize, -2);
rb_define_method(rb_cARGF, "initialize_copy", argf_initialize_copy, 1);
rb_define_method(rb_cARGF, "to_s", argf_to_s, 0);
rb_define_alias(rb_cARGF, "inspect", "to_s");
rb_define_method(rb_cARGF, "argv", argf_argv, 0);
rb_define_method(rb_cARGF, "fileno", argf_fileno, 0);
rb_define_method(rb_cARGF, "to_i", argf_fileno, 0);
rb_define_method(rb_cARGF, "to_io", argf_to_io, 0);
rb_define_method(rb_cARGF, "to_write_io", argf_write_io, 0);
rb_define_method(rb_cARGF, "each", argf_each_line, -1);
rb_define_method(rb_cARGF, "each_line", argf_each_line, -1);
rb_define_method(rb_cARGF, "each_byte", argf_each_byte, 0);
rb_define_method(rb_cARGF, "each_char", argf_each_char, 0);
rb_define_method(rb_cARGF, "each_codepoint", argf_each_codepoint, 0);
rb_define_method(rb_cARGF, "lines", argf_lines, -1);
rb_define_method(rb_cARGF, "bytes", argf_bytes, 0);
rb_define_method(rb_cARGF, "chars", argf_chars, 0);
rb_define_method(rb_cARGF, "codepoints", argf_codepoints, 0);
rb_define_method(rb_cARGF, "read", argf_read, -1);
rb_define_method(rb_cARGF, "readpartial", argf_readpartial, -1);
rb_define_method(rb_cARGF, "read_nonblock", argf_read_nonblock, -1);
rb_define_method(rb_cARGF, "readlines", argf_readlines, -1);
rb_define_method(rb_cARGF, "to_a", argf_readlines, -1);
rb_define_method(rb_cARGF, "gets", argf_gets, -1);
rb_define_method(rb_cARGF, "readline", argf_readline, -1);
rb_define_method(rb_cARGF, "getc", argf_getc, 0);
rb_define_method(rb_cARGF, "getbyte", argf_getbyte, 0);
rb_define_method(rb_cARGF, "readchar", argf_readchar, 0);
rb_define_method(rb_cARGF, "readbyte", argf_readbyte, 0);
rb_define_method(rb_cARGF, "tell", argf_tell, 0);
rb_define_method(rb_cARGF, "seek", argf_seek_m, -1);
rb_define_method(rb_cARGF, "rewind", argf_rewind, 0);
rb_define_method(rb_cARGF, "pos", argf_tell, 0);
rb_define_method(rb_cARGF, "pos=", argf_set_pos, 1);
rb_define_method(rb_cARGF, "eof", argf_eof, 0);
rb_define_method(rb_cARGF, "eof?", argf_eof, 0);
rb_define_method(rb_cARGF, "binmode", argf_binmode_m, 0);
rb_define_method(rb_cARGF, "binmode?", argf_binmode_p, 0);
rb_define_method(rb_cARGF, "write", argf_write, 1);
rb_define_method(rb_cARGF, "print", rb_io_print, -1);
rb_define_method(rb_cARGF, "putc", rb_io_putc, 1);
rb_define_method(rb_cARGF, "puts", rb_io_puts, -1);
rb_define_method(rb_cARGF, "printf", rb_io_printf, -1);
rb_define_method(rb_cARGF, "filename", argf_filename, 0);
rb_define_method(rb_cARGF, "path", argf_filename, 0);
rb_define_method(rb_cARGF, "file", argf_file, 0);
rb_define_method(rb_cARGF, "skip", argf_skip, 0);
rb_define_method(rb_cARGF, "close", argf_close_m, 0);
rb_define_method(rb_cARGF, "closed?", argf_closed, 0);
rb_define_method(rb_cARGF, "lineno", argf_lineno, 0);
rb_define_method(rb_cARGF, "lineno=", argf_set_lineno, 1);
rb_define_method(rb_cARGF, "inplace_mode", argf_inplace_mode_get, 0);
rb_define_method(rb_cARGF, "inplace_mode=", argf_inplace_mode_set, 1);
rb_define_method(rb_cARGF, "external_encoding", argf_external_encoding, 0);
rb_define_method(rb_cARGF, "internal_encoding", argf_internal_encoding, 0);
rb_define_method(rb_cARGF, "set_encoding", argf_set_encoding, -1);
argf = rb_class_new_instance(0, 0, rb_cARGF);
rb_define_readonly_variable("$<", &argf);
/*
* ARGF is a stream designed for use in scripts that process files given
* as command-line arguments or passed in via STDIN.
*
* See ARGF (the class) for more details.
*/
rb_define_global_const("ARGF", argf);
rb_define_hooked_variable("$.", &argf, argf_lineno_getter, argf_lineno_setter);
rb_define_hooked_variable("$FILENAME", &argf, argf_filename_getter, rb_gvar_readonly_setter);
ARGF.filename = rb_str_new2("-");
rb_define_hooked_variable("$-i", &argf, opt_i_get, opt_i_set);
rb_define_hooked_variable("$*", &argf, argf_argv_getter, rb_gvar_readonly_setter);
#if defined (_WIN32) || defined(__CYGWIN__)
atexit(pipe_atexit);
#endif
Init_File();
rb_define_method(rb_cFile, "initialize", rb_file_initialize, -1);
sym_mode = ID2SYM(rb_intern("mode"));
sym_perm = ID2SYM(rb_intern("perm"));
sym_flags = ID2SYM(rb_intern("flags"));
sym_extenc = ID2SYM(rb_intern("external_encoding"));
sym_intenc = ID2SYM(rb_intern("internal_encoding"));
sym_encoding = ID2SYM(rb_id_encoding());
sym_open_args = ID2SYM(rb_intern("open_args"));
sym_textmode = ID2SYM(rb_intern("textmode"));
sym_binmode = ID2SYM(rb_intern("binmode"));
sym_autoclose = ID2SYM(rb_intern("autoclose"));
sym_normal = ID2SYM(rb_intern("normal"));
sym_sequential = ID2SYM(rb_intern("sequential"));
sym_random = ID2SYM(rb_intern("random"));
sym_willneed = ID2SYM(rb_intern("willneed"));
sym_dontneed = ID2SYM(rb_intern("dontneed"));
sym_noreuse = ID2SYM(rb_intern("noreuse"));
sym_SET = ID2SYM(rb_intern("SET"));
sym_CUR = ID2SYM(rb_intern("CUR"));
sym_END = ID2SYM(rb_intern("END"));
#ifdef SEEK_DATA
sym_DATA = ID2SYM(rb_intern("DATA"));
#endif
#ifdef SEEK_HOLE
sym_HOLE = ID2SYM(rb_intern("HOLE"));
#endif
sym_wait_readable = ID2SYM(rb_intern("wait_readable"));
sym_wait_writable = ID2SYM(rb_intern("wait_writable"));
}
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