sysdeps/unix/sysv/linux/lxstat.c

   1 /* lxstat using old-style Unix lstat 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, 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 __lxstat64 __lxstat64_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 #include <bp-checks.h>
  31
  32 #include <xstatconv.h>
  33
  34 /* Get information about the file NAME in BUF.  */
  35 int
  36 __lxstat (int vers, const char *name, struct stat *buf)
  37 {
  38   if (vers == _STAT_VER_KERNEL)
  39     return INLINE_SYSCALL (lstat, 2, CHECK_STRING (name),
  40                            CHECK_1 ((struct kernel_stat *) buf));
  41
  42 #ifdef STAT_IS_KERNEL_STAT
  43   errno = EINVAL;
  44   return -1;
  45 #else
  46   struct kernel_stat kbuf;
  47   int result;
  48
  49   result = INLINE_SYSCALL (lstat, 2, CHECK_STRING (name), __ptrvalue (&kbuf));
  50   if (result == 0)
  51     result = __xstat_conv (vers, &kbuf, buf);
  52
  53   return result;
  54 #endif
  55 }
  56
  57 hidden_def (__lxstat)
  58 weak_alias (__lxstat, _lxstat);
  59 #ifdef XSTAT_IS_XSTAT64
  60 #undef __lxstat64
  61 strong_alias (__lxstat, __lxstat64);
  62 hidden_ver (__lxstat, __lxstat64)
  63 #endif