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Removed missing/dup2.c

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This function should be always available, as POSIX-compliant or
Windows platform are required since 1.9.  Also the code in this
file is MT-unsafe.
This commit is contained in:
Nobuyoshi Nakada 2021-05-01 22:07:46 +09:00
parent 1d0e670e91
commit 2d67027448
Notes: git 2021-05-10 15:59:48 +09:00
5 changed files with 8 additions and 70 deletions
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1
LEGAL
View file

@ -531,7 +531,6 @@ mentioned below.
[include/ruby/st.h]
[missing/acosh.c]
[missing/alloca.c]
[missing/dup2.c]
[missing/erf.c]
[missing/finite.c]
[missing/hypot.c]

9
configure.ac
View file

@ -1858,10 +1858,16 @@ AS_CASE(["$target_os"],[freebsd*],[
AC_REPLACE_FUNCS(close)
])
AC_DEFUN([RUBY_REQUIRE_FUNC], [
AC_CHECK_FUNCS([$1])
AS_IF([test "$ac_cv_func_[]AS_TR_SH($1)" = yes], [],
[AC_MSG_ERROR($1[() must be supported])])
])
m4_map_args_w([dup dup2], [RUBY_REQUIRE_FUNC(], [)])
AC_REPLACE_FUNCS(acosh)
AC_REPLACE_FUNCS(cbrt)
AC_REPLACE_FUNCS(crypt)
AC_REPLACE_FUNCS(dup2)
AC_REPLACE_FUNCS(erf)
AC_REPLACE_FUNCS(explicit_bzero)
AC_REPLACE_FUNCS(ffs)
@ -1922,7 +1928,6 @@ AC_CHECK_FUNCS(dirfd)
AC_CHECK_FUNCS(dl_iterate_phdr)
AC_CHECK_FUNCS(dlopen)
AC_CHECK_FUNCS(dladdr)
AC_CHECK_FUNCS(dup)
AC_CHECK_FUNCS(dup3)
AC_CHECK_FUNCS(eaccess)
AC_CHECK_FUNCS(endgrent)

4
include/ruby/missing.h
View file

@ -84,10 +84,6 @@ RUBY_EXTERN double atanh(double);
RUBY_EXTERN char *crypt(const char *, const char *);
#endif
#ifndef HAVE_DUP2
RUBY_EXTERN int dup2(int, int);
#endif
#ifndef HAVE_EACCESS
RUBY_EXTERN int eaccess(const char*, int);
#endif

4
io.c
View file

@ -462,7 +462,7 @@ rb_cloexec_fcntl_dupfd(int fd, int minfd)
}
#elif defined(HAVE_FCNTL) && defined(F_DUPFD)
ret = fcntl(fd, F_DUPFD, minfd);
#elif defined(HAVE_DUP)
#else
ret = dup(fd);
if (ret >= 0 && ret < minfd) {
const int prev_fd = ret;
@ -470,8 +470,6 @@ rb_cloexec_fcntl_dupfd(int fd, int minfd)
close(prev_fd);
}
return ret;
#else
# error "dup() or fcntl(F_DUPFD) must be supported."
#endif
if (ret < 0) return ret;
rb_maygvl_fd_fix_cloexec(ret);

60
missing/dup2.c
View file

@ -1,60 +0,0 @@
/*
* Public domain dup2() lookalike
* by Curtis Jackson @ AT&T Technologies, Burlington, NC
* electronic address: burl!rcj
*
* dup2 performs the following functions:
*
* Check to make sure that fd1 is a valid open file descriptor.
* Check to see if fd2 is already open; if so, close it.
* Duplicate fd1 onto fd2; checking to make sure fd2 is a valid fd.
* Return fd2 if all went well; return BADEXIT otherwise.
*/
#include "ruby/internal/config.h"
#if defined(HAVE_FCNTL)
# include <fcntl.h>
#endif
#if !defined(HAVE_FCNTL) || !defined(F_DUPFD)
# include <errno.h>
#endif
#define BADEXIT -1
int
dup2(int fd1, int fd2)
{
#if defined(HAVE_FCNTL) && defined(F_DUPFD)
if (fd1 != fd2) {
#ifdef F_GETFL
if (fcntl(fd1, F_GETFL) < 0)
return BADEXIT;
if (fcntl(fd2, F_GETFL) >= 0)
close(fd2);
#else
close(fd2);
#endif
if (fcntl(fd1, F_DUPFD, fd2) < 0)
return BADEXIT;
}
return fd2;
#else
extern int errno;
int i, fd, fds[256];
if (fd1 == fd2) return 0;
close(fd2);
for (i=0; i<256; i++) {
fd = fds[i] = dup(fd1);
if (fd == fd2) break;
}
while (i) {
close(fds[i--]);
}
if (fd == fd2) return 0;
errno = EMFILE;
return BADEXIT;
#endif
}