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ruby--ruby/ruby.c
eban 5504b5c876 eban 
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1062 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2000-12-13 03:48:30 +00:00

1014 lines
20 KiB
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/**********************************************************************
ruby.c -
$Author$
$Date$
created at: Tue Aug 10 12:47:31 JST 1993
Copyright (C) 1993-2000 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#ifdef _WIN32
#include <windows.h>
#endif
#include "ruby.h"
#include "dln.h"
#include "node.h"
#include <stdio.h>
#include <sys/types.h>
#include <ctype.h>
#ifdef __hpux
#include <sys/pstat.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef HAVE_STRING_H
char *strchr _((const char*,const char));
char *strrchr _((const char*,const char));
char *strstr _((const char*,const char*));
#endif
#include "util.h"
#ifndef HAVE_STDLIB_H
char *getenv();
#endif
VALUE ruby_debug = Qfalse;
VALUE ruby_verbose = Qfalse;
static int sflag = 0;
static int xflag = 0;
extern int yydebug;
char *ruby_inplace_mode = Qfalse;
static void load_stdin _((void));
static void load_file _((char *, int));
static void forbid_setid _((const char *));
static VALUE do_loop = Qfalse, do_print = Qfalse;
static VALUE do_check = Qfalse, do_line = Qfalse;
static VALUE do_split = Qfalse;
static char *script;
static int origargc;
static char **origargv;
static void
usage(name)
const char *name;
{
/* This message really ought to be max 23 lines.
* Removed -h because the user already knows that option. Others? */
static char *usage_msg[] = {
"-0[octal] specify record separator (\\0, if no argument)",
"-a autosplit mode with -n or -p (splits $_ into $F)",
"-c check syntax only",
"-Cdirectory cd to directory, before executing your script",
"-d set debugging flags (set $DEBUG to true)",
"-e 'command' one line of script. Several -e's allowed. Omit [programfile]",
"-Fpattern split() pattern for autosplit (-a)",
"-i[extension] edit ARGV files in place (make backup if extension supplied)",
"-Idirectory specify $LOAD_PATH directory (may be used more than once)",
"-Kkcode specifies KANJI (Japanese) code-set",
"-l enable line ending processing",
"-n assume 'while gets(); ... end' loop around your script",
"-p assume loop like -n but print line also like sed",
"-rlibrary require the library, before executing your script",
"-s enable some switch parsing for switches after script name",
"-S look for the script using PATH environment variable",
"-T[level] turn on tainting checks",
"-v print version number, then turn on verbose mode",
"-w turn warnings on for your script",
"-x[directory] strip off text before #!ruby line and perhaps cd to directory",
"--copyright print the copyright",
"--version print the version",
NULL
};
char **p = usage_msg;
printf("Usage: %s [switches] [--] [programfile] [arguments]\n", name);
while (*p)
printf(" %s\n", *p++);
}
extern VALUE rb_load_path;
#define STATIC_FILE_LENGTH 255
#if defined(_WIN32) || defined(DJGPP)
static char *
rubylib_mangle(s, l)
char *s;
unsigned int l;
{
static char *newp, *oldp;
static int newl, oldl, notfound;
static char newsub[STATIC_FILE_LENGTH+1];
if (!newp && !notfound) {
newp = getenv("RUBYLIB_PREFIX");
if (newp) {
char *s;
oldp = newp;
while (*newp && !ISSPACE(*newp) && *newp != ';') {
newp++; oldl++; /* Skip digits. */
}
while (*newp && (ISSPACE(*newp) || *newp == ';')) {
newp++; /* Skip whitespace. */
}
newl = strlen(newp);
if (newl == 0 || oldl == 0 || newl > STATIC_FILE_LENGTH) {
rb_fatal("malformed RUBYLIB_PREFIX");
}
strcpy(newsub, newp);
s = newsub;
while (*s) {
if (*s == '\\') *s = '/';
s++;
}
} else {
notfound = 1;
}
}
if (l == 0) {
l = strlen(s);
}
if (!newp || l < oldl || strncasecmp(oldp, s, oldl) != 0) {
static char ret[STATIC_FILE_LENGTH+1];
strncpy(ret, s, l);
ret[l] = 0;
return ret;
}
if (l + newl - oldl > STATIC_FILE_LENGTH || newl > STATIC_FILE_LENGTH) {
rb_fatal("malformed RUBYLIB_PREFIX");
}
strcpy(newsub + newl, s + oldl);
newsub[l + newl - oldl] = 0;
return newsub;
}
#define rubylib_mangled_path(s, l) rb_str_new2(rubylib_mangle((s), (l)))
#define rubylib_mangled_path2(s) rb_str_new2(rubylib_mangle((s), 0))
#else
#define rubylib_mangled_path(s, l) rb_str_new((s), (l))
#define rubylib_mangled_path2(s) rb_str_new2(s)
#endif
void
ruby_incpush(path)
const char *path;
{
const char sep = PATH_SEP_CHAR;
if (path == 0) return;
#if defined(__CYGWIN32__)
{
char rubylib[FILENAME_MAX];
conv_to_posix_path(path, rubylib, FILENAME_MAX);
path = rubylib;
}
#endif
if (strchr(path, sep)) {
const char *p, *s;
VALUE ary = rb_ary_new();
p = path;
while (*p) {
while (*p == sep) p++;
if (s = strchr(p, sep)) {
rb_ary_push(ary, rubylib_mangled_path(p, (int)(s-p)));
p = s + 1;
}
else {
rb_ary_push(ary, rubylib_mangled_path2(p));
break;
}
}
rb_ary_concat(rb_load_path, ary);
}
else {
rb_ary_push(rb_load_path, rubylib_mangled_path2(path));
}
}
void
ruby_init_loadpath()
{
#if defined(_WIN32) || defined(DJGPP) || defined(__EMX__)
char libpath[FILENAME_MAX+1];
char *p;
int rest;
#if defined(_WIN32)
GetModuleFileName(NULL, libpath, sizeof libpath);
#elif defined(DJGPP)
extern char *__dos_argv0;
strncpy(libpath, __dos_argv0, FILENAME_MAX);
#elif defined(__EMX__)
_execname(libpath, FILENAME_MAX);
#endif
p = strrchr(libpath, '\\');
if (p) {
*p = 0;
if (p-libpath > 3 && !strcasecmp(p-4, "\\bin")) {
p -= 4;
*p = 0;
}
} else {
strcpy(libpath, ".");
p = libpath + 1;
}
#if !defined(__CYGWIN32__)
#ifndef CharNext /* defined as CharNext[AW] on Windows. */
#define CharNext(p) ((p) + 1)
#endif
for (p = libpath; *p; p = CharNext(p))
if (*p == '\\')
*p = '/';
#endif
rest = FILENAME_MAX - (p - libpath);
#define RUBY_RELATIVE(path) (strncpy(p, (path), rest), libpath)
#else
#define RUBY_RELATIVE(path) (path)
#endif
if (rb_safe_level() == 0) {
ruby_incpush(getenv("RUBYLIB"));
}
#ifdef RUBY_SEARCH_PATH
ruby_incpush(RUBY_RELATIVE(RUBY_SEARCH_PATH));
#endif
#ifdef RUBY_SITE_THIN_ARCHLIB
ruby_incpush(RUBY_RELATIVE(RUBY_SITE_THIN_ARCHLIB));
#endif
ruby_incpush(RUBY_RELATIVE(RUBY_SITE_ARCHLIB));
ruby_incpush(RUBY_RELATIVE(RUBY_SITE_LIB2));
ruby_incpush(RUBY_RELATIVE(RUBY_SITE_LIB));
#ifdef RUBY_THIN_ARCHLIB
ruby_incpush(RUBY_RELATIVE(RUBY_THIN_ARCHLIB));
#endif
ruby_incpush(RUBY_RELATIVE(RUBY_ARCHLIB));
ruby_incpush(RUBY_RELATIVE(RUBY_LIB));
if (rb_safe_level() == 0) {
ruby_incpush(".");
}
}
struct req_list {
char *name;
struct req_list *next;
} req_list_head;
struct req_list *req_list_last = &req_list_head;
static void
add_modules(mod)
const char *mod;
{
struct req_list *list;
list = ALLOC(struct req_list);
list->name = ALLOC_N(char, strlen(mod)+1);
strcpy(list->name, mod);
list->next = 0;
req_list_last->next = list;
req_list_last = list;
}
extern void Init_ext _((void));
void
require_libraries()
{
extern NODE *ruby_eval_tree;
extern NODE *ruby_eval_tree_begin;
char *orig_sourcefile = ruby_sourcefile;
NODE *save[2];
struct req_list *list = req_list_head.next;
struct req_list *tmp;
Init_ext(); /* should be called here for some reason :-( */
ruby_sourcefile = 0;
save[0] = ruby_eval_tree;
save[1] = ruby_eval_tree_begin;
ruby_eval_tree = ruby_eval_tree_begin = 0;
req_list_last = 0;
while (list) {
rb_require(list->name);
tmp = list->next;
free(list->name);
free(list);
list = tmp;
}
req_list_head.next = 0;
ruby_eval_tree = save[0];
ruby_eval_tree_begin = save[1];
ruby_sourcefile = orig_sourcefile;
}
static void
process_sflag()
{
if (sflag) {
int n;
VALUE *args;
n = RARRAY(rb_argv)->len;
args = RARRAY(rb_argv)->ptr;
while (n > 0) {
char *s = STR2CSTR(*args++);
char *p;
if (s[0] != '-') break;
n--;
if (s[1] == '-' && s[2] == '\0') break;
s[0] = '$';
if (p = strchr(s, '=')) {
*p++ = '\0';
rb_gv_set(s, rb_str_new2(p));
}
else {
rb_gv_set(s, Qtrue);
}
s[0] = '-';
}
n = RARRAY(rb_argv)->len - n;
while (n--) {
rb_ary_shift(rb_argv);
}
}
sflag = 0;
}
static void proc_options _((int argc, char **argv));
static char*
moreswitches(s)
char *s;
{
int argc; char *argv[3];
char *p = s;
argc = 2; argv[0] = argv[2] = 0;
while (*s && !ISSPACE(*s))
s++;
argv[1] = ALLOCA_N(char, s-p+2);
argv[1][0] = '-';
strncpy(argv[1]+1, p, s-p);
argv[1][s-p+1] = '\0';
proc_options(argc, argv);
while (*s && ISSPACE(*s))
s++;
return s;
}
static void
proc_options(argc, argv)
int argc;
char **argv;
{
char *argv0 = argv[0];
int do_search;
char *s;
int version = 0;
int copyright = 0;
int verbose = 0;
VALUE e_script = Qfalse;
if (argc == 0) return;
do_search = Qfalse;
for (argc--,argv++; argc > 0; argc--,argv++) {
if (argv[0][0] != '-' || !argv[0][1]) break;
s = argv[0]+1;
reswitch:
switch (*s) {
case 'a':
do_split = Qtrue;
s++;
goto reswitch;
case 'p':
do_print = Qtrue;
/* through */
case 'n':
do_loop = Qtrue;
s++;
goto reswitch;
case 'd':
ruby_debug = Qtrue;
ruby_verbose = Qtrue;
s++;
goto reswitch;
case 'y':
yydebug = 1;
s++;
goto reswitch;
case 'v':
ruby_show_version();
verbose = 1;
case 'w':
ruby_verbose = Qtrue;
s++;
goto reswitch;
case 'c':
do_check = Qtrue;
s++;
goto reswitch;
case 's':
forbid_setid("-s");
sflag = 1;
s++;
goto reswitch;
case 'h':
usage(origargv[0]);
exit(0);
case 'l':
do_line = Qtrue;
rb_output_rs = rb_rs;
s++;
goto reswitch;
case 'S':
forbid_setid("-S");
do_search = Qtrue;
s++;
goto reswitch;
case 'e':
forbid_setid("-e");
if (!*++s) {
s = argv[1];
argc--,argv++;
}
if (!s) {
fprintf(stderr, "%s: no code specified for -e\n", origargv[0]);
exit(2);
}
if (!e_script) {
e_script = rb_str_new(0,0);
if (script == 0) script = "-e";
}
rb_str_cat2(e_script, s);
rb_str_cat2(e_script, "\n");
break;
case 'r':
forbid_setid("-r");
if (*++s) {
add_modules(s);
}
else if (argv[1]) {
add_modules(argv[1]);
argc--,argv++;
}
break;
case 'i':
forbid_setid("-i");
if (ruby_inplace_mode) free(ruby_inplace_mode);
ruby_inplace_mode = strdup(s+1);
break;
case 'x':
xflag = Qtrue;
s++;
if (*s && chdir(s) < 0) {
rb_fatal("Can't chdir to %s", s);
}
break;
case 'C':
case 'X':
s++;
if (!*s) {
s = argv[1];
argc--,argv++;
}
if (!s || !*s) {
rb_fatal("Can't chdir");
}
if (chdir(s) < 0) {
rb_fatal("Can't chdir to %s", s);
}
break;
case 'F':
if (*++s) {
rb_fs = rb_str_new2(s);
}
break;
case 'K':
if (*++s) {
rb_set_kcode(s);
s++;
}
goto reswitch;
case 'T':
{
int numlen;
int v = 1;
if (*++s) {
v = scan_oct(s, 2, &numlen);
if (numlen == 0) v = 1;
}
rb_set_safe_level(v);
}
break;
case 'I':
forbid_setid("-I");
if (*++s)
ruby_incpush(s);
else if (argv[1]) {
ruby_incpush(argv[1]);
argc--,argv++;
}
break;
case '0':
{
int numlen;
int v;
char c;
v = scan_oct(s, 4, &numlen);
s += numlen;
if (v > 0377) rb_rs = Qnil;
else if (v == 0 && numlen >= 2) {
rb_rs = rb_str_new2("\n\n");
}
else {
c = v & 0xff;
rb_rs = rb_str_new(&c, 1);
}
}
goto reswitch;
case '-':
if (!s[1] || s[1] == '\r' && !s[2]) {
argc--,argv++;
goto switch_end;
}
s++;
if (strcmp("copyright", s) == 0)
copyright = 1;
else if (strcmp("debug", s) == 0)
ruby_debug = 1;
else if (strcmp("version", s) == 0)
version = 1;
else if (strcmp("verbose", s) == 0) {
verbose = 1;
ruby_verbose = Qtrue;
}
else if (strcmp("yydebug", s) == 0)
yydebug = 1;
else if (strcmp("help", s) == 0) {
usage(origargv[0]);
exit(0);
}
else {
fprintf(stderr, "%s: invalid option --%s (-h will show valid options)\n",
origargv[0], s);
exit(2);
}
break;
case '*':
case ' ':
if (s[1] == '-') s+=2;
break;
default:
fprintf(stderr, "%s: invalid option -%c (-h will show valid options)\n",
origargv[0], *s);
exit(2);
case 0:
break;
}
}
switch_end:
if (argv0 == 0) return;
if (rb_safe_level() == 0 && (s = getenv("RUBYOPT"))) {
while (ISSPACE(*s)) s++;
if (*s == '-' && *(s+1) == 'T') {
int numlen;
int v = 1;
s += 2;
if (*++s) {
v = scan_oct(s, 2, &numlen);
if (numlen == 0) v = 1;
}
rb_set_safe_level(v);
}
else {
while (s && *s) {
while (ISSPACE(*s)) s++;
if (*s == '-') {
s++;
if (ISSPACE(*s)) continue;
}
if (!*s) break;
if (!strchr("IdvwrK", *s))
rb_raise(rb_eRuntimeError, "Illegal switch in RUBYOPT: -%c", *s);
s = moreswitches(s);
}
}
}
if (e_script) {
argc++, argv--;
argv[0] = script;
}
if (version) {
ruby_show_version();
exit(0);
}
if (copyright) {
ruby_show_copyright();
}
if (!e_script && argc == 0) { /* no more args */
if (verbose) exit(0);
script = "-";
}
else {
script = argv[0];
if (script[0] == '\0') {
script = "-";
}
else {
if (do_search) {
char *path = getenv("RUBYPATH");
script = 0;
if (path) {
script = dln_find_file(argv[0], path);
}
if (!script) {
script = dln_find_file(argv[0], getenv("PATH"));
}
if (!script) script = argv[0];
}
}
argc--; argv++;
}
ruby_script(script);
ruby_set_argv(argc, argv);
process_sflag();
ruby_init_loadpath();
ruby_sourcefile = argv0;
if (e_script) {
require_libraries();
rb_compile_string(script, e_script, 1);
}
else if (strlen(script) == 1 && script[0] == '-') {
load_stdin();
}
else {
load_file(script, 1);
}
process_sflag();
xflag = 0;
}
extern int ruby__end__seen;
static void
load_file(fname, script)
char *fname;
int script;
{
extern VALUE rb_stdin;
VALUE f;
int line_start = 1;
if (strcmp(fname, "-") == 0) {
f = rb_stdin;
}
else {
FILE *fp = fopen(fname, "r");
if (fp == NULL) {
rb_raise(rb_eLoadError, "No such file to load -- %s", fname);
}
fclose(fp);
f = rb_file_open(fname, "r");
#if defined DOSISH || defined __CYGWIN__
{
char *ext = strrchr(fname, '.');
if (ext && strcasecmp(ext, ".exe") == 0)
rb_io_binmode(f);
}
#endif
}
if (script) {
VALUE c;
VALUE line;
char *p;
if (xflag) {
forbid_setid("-x");
xflag = Qfalse;
while (!NIL_P(line = rb_io_gets(f))) {
line_start++;
if (RSTRING(line)->len > 2
&& RSTRING(line)->ptr[0] == '#'
&& RSTRING(line)->ptr[1] == '!') {
if (p = strstr(RSTRING(line)->ptr, "ruby")) {
goto start_read;
}
}
}
rb_raise(rb_eLoadError, "No Ruby script found in input");
}
c = rb_io_getc(f);
if (c == INT2FIX('#')) {
line = rb_io_gets(f);
line_start++;
if (RSTRING(line)->len > 2 && RSTRING(line)->ptr[0] == '!') {
if ((p = strstr(RSTRING(line)->ptr, "ruby")) == 0) {
/* not ruby script, kick the program */
char **argv;
char *path;
char *pend = RSTRING(line)->ptr + RSTRING(line)->len;
p = RSTRING(line)->ptr + 1; /* skip `#!' */
if (pend[-1] == '\n') pend--; /* chomp line */
if (pend[-1] == '\r') pend--;
*pend = '\0';
while (p < pend && ISSPACE(*p))
p++;
path = p; /* interpreter path */
while (p < pend && !ISSPACE(*p))
p++;
*p++ = '\0';
if (p < pend) {
argv = ALLOCA_N(char*, origargc+3);
argv[1] = p;
MEMCPY(argv+2, origargv+1, char*, origargc);
}
else {
argv = origargv;
}
argv[0] = path;
execv(path, argv);
ruby_sourcefile = fname;
ruby_sourceline = 1;
rb_fatal("Can't exec %s", path);
}
start_read:
p += 4;
RSTRING(line)->ptr[RSTRING(line)->len-1] = '\0';
if (RSTRING(line)->ptr[RSTRING(line)->len-2] == '\r')
RSTRING(line)->ptr[RSTRING(line)->len-2] = '\0';
if (p = strstr(p, " -")) {
p++; /* skip space before `-' */
while (*p == '-') {
p = moreswitches(p+1);
}
}
}
}
else if (!NIL_P(c)) {
rb_io_ungetc(f, c);
}
require_libraries(); /* Why here? unnatural */
if (NIL_P(c)) return;
}
rb_compile_file(fname, f, line_start);
if (script && ruby__end__seen) {
rb_define_global_const("DATA", f);
}
else if (f != rb_stdin) {
rb_io_close(f);
}
}
void
rb_load_file(fname)
char *fname;
{
load_file(fname, 0);
}
static void
load_stdin()
{
forbid_setid("program input from stdin");
load_file("-", 1);
}
VALUE rb_progname;
VALUE rb_argv;
VALUE rb_argv0;
static void
set_arg0(val, id)
VALUE val;
ID id;
{
char *s;
int i;
static int len;
if (origargv == 0) rb_raise(rb_eRuntimeError, "$0 not initialized");
#ifndef __hpux
if (len == 0) {
s = origargv[0];
s += strlen(s);
/* See if all the arguments are contiguous in memory */
for (i = 1; i < origargc; i++) {
if (origargv[i] == s + 1)
s += strlen(++s); /* this one is ok too */
}
len = s - origargv[0];
}
#endif
s = rb_str2cstr(val, &i);
#ifndef __hpux
if (i > len) {
memcpy(origargv[0], s, len);
origargv[0][len] = '\0';
}
else {
memcpy(origargv[0], s, i);
s = origargv[0]+i;
*s++ = '\0';
while (++i < len)
*s++ = ' ';
}
rb_progname = rb_tainted_str_new2(origargv[0]);
#else
if (i >= PST_CLEN) {
union pstun j;
j.pst_command = s;
i = PST_CLEN;
RSTRING(val)->len = i;
*(s + i) = '\0';
pstat(PSTAT_SETCMD, j, PST_CLEN, 0, 0);
} else {
union pstun j;
j.pst_command = s;
pstat(PSTAT_SETCMD, j, i, 0, 0);
}
rb_progname = rb_tainted_str_new(s, i);
#endif
}
void
ruby_script(name)
char *name;
{
if (name) {
rb_progname = rb_tainted_str_new2(name);
ruby_sourcefile = name;
}
}
static int uid, euid, gid, egid;
static void
init_ids()
{
uid = (int)getuid();
euid = (int)geteuid();
gid = (int)getgid();
egid = (int)getegid();
#ifdef VMS
uid |= gid << 16;
euid |= egid << 16;
#endif
if (uid && (euid != uid || egid != gid)) {
rb_set_safe_level(1);
}
}
static void
forbid_setid(s)
const char *s;
{
if (euid != uid)
rb_raise(rb_eSecurityError, "No %s allowed while running setuid", s);
if (egid != gid)
rb_raise(rb_eSecurityError, "No %s allowed while running setgid", s);
if (rb_safe_level() > 0)
rb_raise(rb_eSecurityError, "No %s allowed in tainted mode", s);
}
void
ruby_prog_init()
{
init_ids();
ruby_sourcefile = "ruby";
rb_define_variable("$VERBOSE", &ruby_verbose);
rb_define_variable("$-v", &ruby_verbose);
rb_define_variable("$-w", &ruby_verbose);
rb_define_variable("$DEBUG", &ruby_debug);
rb_define_variable("$-d", &ruby_debug);
rb_define_readonly_variable("$-p", &do_print);
rb_define_readonly_variable("$-l", &do_line);
rb_define_hooked_variable("$0", &rb_progname, 0, set_arg0);
rb_argv = rb_ary_new();
rb_define_readonly_variable("$*", &rb_argv);
rb_define_global_const("ARGV", rb_argv);
rb_define_readonly_variable("$-a", &do_split);
rb_global_variable(&rb_argv0);
#ifdef MSDOS
/*
* There is no way we can refer to them from ruby, so close them to save
* space.
*/
(void)fclose(stdaux);
(void)fclose(stdprn);
#endif
}
void
ruby_set_argv(argc, argv)
int argc;
char **argv;
{
int i;
#if defined(USE_DLN_A_OUT)
if (origargv) dln_argv0 = origargv[0];
else dln_argv0 = argv[0];
#endif
for (i=0; i < argc; i++) {
rb_ary_push(rb_argv, rb_tainted_str_new2(argv[i]));
}
}
void
ruby_process_options(argc, argv)
int argc;
char **argv;
{
origargc = argc; origargv = argv;
ruby_script(argv[0]); /* for the time being */
rb_argv0 = rb_progname;
#if defined(USE_DLN_A_OUT)
dln_argv0 = argv[0];
#endif
proc_options(argc, argv);
if (do_check && ruby_nerrs == 0) {
printf("Syntax OK\n");
exit(0);
}
if (do_print) {
rb_parser_append_print();
}
if (do_loop) {
rb_parser_while_loop(do_line, do_split);
}
}
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