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/* Copyright (C) 2005 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. */
/* Ho hum, since fxstatat == fxstatat64 we must get rid of the
prototype or gcc will complain since they don't strictly match. */
#define __fxstatat64 __fxstatat64_disable
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include <bp-checks.h>
/* Get information about the file NAME relative to FD in ST. */
int
__fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
{
if ((vers != _STAT_VER_KERNEL && vers != _STAT_VER_LINUX)
|| (flag & ~AT_SYMLINK_NOFOLLOW) != 0)
{
__set_errno (EINVAL);
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
static const char procfd[] = "/proc/self/fd/%d/%s";
/* Buffer for the path name we are going to use. It consists of
- the string /proc/self/fd/
- the file descriptor number
- the file name provided.
The final NUL is included in the sizeof. A bit of overhead
due to the format elements compensates for possible negative
numbers. */
size_t buflen = sizeof (procfd) + sizeof (int) * 3 + filelen;
buf = alloca (buflen);
__snprintf (buf, buflen, procfd, fd, file);
file = buf;
}
INTERNAL_SYSCALL_DECL (err);
int res;
if (flag & AT_SYMLINK_NOFOLLOW)
res = INTERNAL_SYSCALL (lstat, err, 2, file, CHECK_1 (st));
else
res = INTERNAL_SYSCALL (stat, err, 2, file, CHECK_1 (st));
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (res, err), 0))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (res, err), fd, buf);
res = -1;
}
return res;
}
#undef __fxstatat64
strong_alias (__fxstatat, __fxstatat64);
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