sysdeps/unix/sysv/linux/utimes.c

   1 /* Copyright (C) 1995, 1997, 2000, 2003, 2006 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <stddef.h>
  21 #include <utime.h>
  22 #include <sys/time.h>
  23 #include <sysdep.h>
  24 #include <kernel-features.h>
  25
  26
  27 /* Change the access time of FILE to TVP[0] and
  28    the modification time of FILE to TVP[1].  */
  29 int
  30 __utimes (const char *file, const struct timeval tvp[2])
  31 {
  32 #ifdef __NR_utimes
  33   int result = INLINE_SYSCALL (utimes, 2, file, tvp);
  34 # ifndef __ASSUME_UTIMES
  35   if (result != -1 || errno != ENOSYS)
  36 # endif
  37     return result;
  38 #endif
  39
  40   /* The utimes() syscall does not exist or is not available in the
  41      used kernel.  Use utime().  For this we have to convert to the
  42      data format utime() expects.  */
  43 #ifndef __ASSUME_UTIMES
  44   struct utimbuf buf;
  45   struct utimbuf *times;
  46
  47   if (tvp != NULL)
  48     {
  49       times = &buf;
  50       buf.actime = tvp[0].tv_sec + tvp[0].tv_usec / 1000000;
  51       buf.modtime = tvp[1].tv_sec + tvp[1].tv_usec / 1000000;
  52     }
  53   else
  54     times = NULL;
  55
  56   return INLINE_SYSCALL (utime, 2, file, times);
  57 #endif
  58 }
  59
  60 weak_alias (__utimes, utimes)