mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-18 19:10:06 +00:00
13ece8977b
* include/wctype.h: Define iswalnum with libc_hidden_proto. * include/signal.h: Define raise with libc_hidden_proto. * sysdeps/unix/sysv/linux/fexecve.c (fexecve): Use __snprintf and __execve instead of snprintf and execve.
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/* Copyright (C) 1994, 1995, 1996, 1997, 2002 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/stat.h>
|
|
|
|
|
|
/* Execute the file FD refers to, overlaying the running program image.
|
|
ARGV and ENVP are passed to the new program, as for `execve'. */
|
|
int
|
|
fexecve (fd, argv, envp)
|
|
int fd;
|
|
char *const argv[];
|
|
char *const envp[];
|
|
{
|
|
if (fd < 0 || argv == NULL || envp == NULL)
|
|
{
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
/* We use the /proc filesystem to get the information. If it is not
|
|
mounted we fail. */
|
|
char buf[sizeof "/proc/self/fd/" + sizeof (int) * 3];
|
|
__snprintf (buf, sizeof (buf), "/proc/self/fd/%d", fd);
|
|
|
|
/* We do not need the return value. */
|
|
__execve (buf, argv, envp);
|
|
|
|
int save = errno;
|
|
|
|
/* We come here only if the 'execve' call fails. Determine whether
|
|
/proc is mounted. If not we return ENOSYS. */
|
|
struct stat st;
|
|
if (stat ("/proc/self/fd", &st) != 0 && errno == ENOENT)
|
|
save = ENOSYS;
|
|
|
|
__set_errno (save);
|
|
|
|
return -1;
|
|
}
|