glibc/sysdeps/unix/sysv/linux/utimes.c

60 lines
1.7 KiB
C

/* Copyright (C) 1995-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stddef.h>
#include <utime.h>
#include <sys/time.h>
#include <sysdep.h>
#include <kernel-features.h>
/* Change the access time of FILE to TVP[0] and
the modification time of FILE to TVP[1]. */
int
__utimes (const char *file, const struct timeval tvp[2])
{
#ifdef __NR_utimes
int result = INLINE_SYSCALL (utimes, 2, file, tvp);
# ifndef __ASSUME_UTIMES
if (result != -1 || errno != ENOSYS)
# endif
return result;
#endif
/* The utimes() syscall does not exist or is not available in the
used kernel. Use utime(). For this we have to convert to the
data format utime() expects. */
#ifndef __ASSUME_UTIMES
struct utimbuf buf;
struct utimbuf *times;
if (tvp != NULL)
{
times = &buf;
buf.actime = tvp[0].tv_sec + tvp[0].tv_usec / 1000000;
buf.modtime = tvp[1].tv_sec + tvp[1].tv_usec / 1000000;
}
else
times = NULL;
return INLINE_SYSCALL (utime, 2, file, times);
#endif
}
weak_alias (__utimes, utimes)