glibc/sysdeps/unix/sysv/linux/fxstatat.c

/* Copyright (C) 2005-2018 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, see
   <http://www.gnu.org/licenses/>.  */

/* Ho hum, if 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 <string.h>
#include <sys/stat.h>
#include <kernel_stat.h>

#include <sysdep.h>
#include <sys/syscall.h>

#include <xstatconv.h>

/* Get information about the file NAME in BUF.  */
int
__fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
{
  int result;
  INTERNAL_SYSCALL_DECL (err);
#ifdef STAT_IS_KERNEL_STAT
# define kst (*st)
#else
  struct kernel_stat kst;
#endif

  result = INTERNAL_SYSCALL (newfstatat, err, 4, fd, file, &kst, flag);
  if (!__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1))
    {
#ifdef STAT_IS_KERNEL_STAT
      return 0;
#else
      return __xstat_conv (vers, &kst, st);
#endif
    }
  else
    return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (result,
								      err));
}
libc_hidden_def (__fxstatat)
#if XSTAT_IS_XSTAT64
# undef __fxstatat64
strong_alias (__fxstatat, __fxstatat64);
libc_hidden_def (__fxstatat64)
#endif