sysdeps/unix/sysv/linux/fxstat.c

   1 /* fxstat using old-style Unix fstat system call.
   2    Copyright (C) 1991,1995-1998,2000,2002,2003 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 /* Ho hum, if xstat == xstat64 we must get rid of the prototype or gcc
  21    will complain since they don't strictly match.  */
  22 #define __fxstat64 __fxstat64_disable
  23
  24 #include <errno.h>
  25 #include <stddef.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <kernel_stat.h>
  29
  30 #include <sysdep.h>
  31 #include <sys/syscall.h>
  32 #include <bp-checks.h>
  33
  34 #include <xstatconv.h>
  35
  36 /* Get information about the file FD in BUF.  */
  37 int
  38 __fxstat (int vers, int fd, struct stat *buf)
  39 {
  40   if (vers == _STAT_VER_KERNEL)
  41     return INLINE_SYSCALL (fstat, 2, fd, CHECK_1 ((struct kernel_stat *) buf));
  42
  43 #ifdef STAT_IS_KERNEL_STAT
  44   errno = EINVAL;
  45   return -1;
  46 #else
  47   struct kernel_stat kbuf;
  48   int result;
  49
  50   result = INLINE_SYSCALL (fstat, 2, fd, __ptrvalue (&kbuf));
  51   if (result == 0)
  52     result = __xstat_conv (vers, &kbuf, buf);
  53
  54   return result;
  55 #endif
  56 }
  57
  58 hidden_def (__fxstat)
  59 weak_alias (__fxstat, _fxstat);
  60 #ifdef XSTAT_IS_XSTAT64
  61 #undef __fxstat64
  62 strong_alias (__fxstat, __fxstat64);
  63 hidden_ver (__fxstat, __fxstat64)
  64 #endif