sysdeps/unix/sysv/linux/generic/futimesat.c

   1 /* Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
   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 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <stddef.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <utime.h>
  25 #include <sys/time.h>
  26 #include <sysdep.h>
  27 #include <kernel-features.h>
  28
  29
  30 /* Change the access time of FILE relative to FD to TVP[0] and
  31    the modification time of FILE to TVP[1].  */
  32 int
  33 futimesat (int fd, const char *file, const struct timeval tvp[2])
  34 {
  35   struct timespec tsp[2];
  36   int result;
  37
  38   if (tvp)
  39     {
  40       if (tvp[0].tv_usec >= 1000000 || tvp[0].tv_usec < 0 ||
  41           tvp[1].tv_usec >= 1000000 || tvp[1].tv_usec < 0)
  42         {
  43           __set_errno (EINVAL);
  44           return -1;
  45         }
  46       TIMEVAL_TO_TIMESPEC (&tvp[0], &tsp[0]);
  47       TIMEVAL_TO_TIMESPEC (&tvp[1], &tsp[1]);
  48     }
  49
  50   result = INLINE_SYSCALL (utimensat, 4, fd, file, tvp ? tsp : NULL, 0);
  51   return result;
  52 }