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glibc  2.9
utimes.c
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00001 /* Copyright (C) 1995, 1997, 2000, 2003, 2006 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <stddef.h>
00021 #include <utime.h>
00022 #include <sys/time.h>
00023 #include <sysdep.h>
00024 #include <kernel-features.h>
00025 
00026 
00027 /* Change the access time of FILE to TVP[0] and
00028    the modification time of FILE to TVP[1].  */
00029 int
00030 __utimes (const char *file, const struct timeval tvp[2])
00031 {
00032 #ifdef __NR_utimes
00033   int result = INLINE_SYSCALL (utimes, 2, file, tvp);
00034 # ifndef __ASSUME_UTIMES
00035   if (result != -1 || errno != ENOSYS)
00036 # endif
00037     return result;
00038 #endif
00039 
00040   /* The utimes() syscall does not exist or is not available in the
00041      used kernel.  Use utime().  For this we have to convert to the
00042      data format utime() expects.  */
00043 #ifndef __ASSUME_UTIMES
00044   struct utimbuf buf;
00045   struct utimbuf *times;
00046 
00047   if (tvp != NULL)
00048     {
00049       times = &buf;
00050       buf.actime = tvp[0].tv_sec + tvp[0].tv_usec / 1000000;
00051       buf.modtime = tvp[1].tv_sec + tvp[1].tv_usec / 1000000;
00052     }
00053   else
00054     times = NULL;
00055 
00056   return INLINE_SYSCALL (utime, 2, file, times);
00057 #endif
00058 }
00059 
00060 weak_alias (__utimes, utimes)