sysdeps/unix/sysv/linux/i386/fxstat.c

   1 /* fxstat using old-style Unix fstat system call.
   2    Copyright (C) 1991-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /* Ho hum, if xstat == xstat64 we must get rid of the prototype or gcc
  20    will complain since they don't strictly match.  */
  21 #define __fxstat64 __fxstat64_disable
  22
  23 #include <errno.h>
  24 #include <stddef.h>
  25 #include <sys/stat.h>
  26 #include <kernel_stat.h>
  27
  28 #include <sysdep.h>
  29 #include <sys/syscall.h>
  30
  31 #include <xstatconv.h>
  32
  33 /* Get information about the file FD in BUF.  */
  34 int
  35 __fxstat (int vers, int fd, struct stat *buf)
  36 {
  37   int result;
  38
  39   if (vers == _STAT_VER_KERNEL)
  40     return INLINE_SYSCALL (fstat, 2, fd, (struct kernel_stat *) buf);
  41
  42   {
  43     struct stat64 buf64;
  44
  45     INTERNAL_SYSCALL_DECL (err);
  46     result = INTERNAL_SYSCALL (fstat64, err, 2, fd, &buf64);
  47     if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
  48       return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (result,
  49                                                                         err));
  50     else
  51       return __xstat32_conv (vers, &buf64, buf);
  52   }
  53 }
  54
  55 hidden_def (__fxstat)
  56 weak_alias (__fxstat, _fxstat);
  57 #ifdef XSTAT_IS_XSTAT64
  58 #undef __fxstat64
  59 strong_alias (__fxstat, __fxstat64);
  60 hidden_ver (__fxstat, __fxstat64)
  61 #endif