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/* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* Written by Paul Eggert. */
/* derived from a function in touch.c */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "utimens.h"
#include <errno.h>
#include <fcntl.h>
#if HAVE_UTIME_H
# include <utime.h>
#endif
/* Some systems (even some that do have <utime.h>) don't declare this
structure anywhere. */
#ifndef HAVE_STRUCT_UTIMBUF
struct utimbuf
{
long actime;
long modtime;
};
#endif
#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
# define __attribute__(x)
#endif
#ifndef ATTRIBUTE_UNUSED
# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#endif
/* Set the access and modification time stamps of FD (a.k.a. FILE) to be
TIMESPEC[0] and TIMESPEC[1], respectively.
FD must be either negative -- in which case it is ignored --
or a file descriptor that is open on FILE.
If TIMESPEC is null, set the time stamps to the current time. */
int
futimens (int fd ATTRIBUTE_UNUSED,
char const *file, struct timespec const timespec[2])
{
/* There's currently no interface to set file timestamps with
nanosecond resolution, so do the best we can, discarding any
fractional part of the timestamp. */
#if HAVE_FUTIMESAT || HAVE_WORKING_UTIMES
struct timeval timeval[2];
struct timeval const *t;
if (timespec)
{
timeval[0].tv_sec = timespec[0].tv_sec;
timeval[0].tv_usec = timespec[0].tv_nsec / 1000;
timeval[1].tv_sec = timespec[1].tv_sec;
timeval[1].tv_usec = timespec[1].tv_nsec / 1000;
t = timeval;
}
else
t = NULL;
# if HAVE_FUTIMESAT
return fd < 0 ? futimesat (AT_FDCWD, file, t) : futimesat (fd, NULL, t);
# else
# if HAVE_FUTIMES
if (0 <= fd)
{
if (futimes (fd, t) == 0)
return 0;
/* On GNU/Linux without the futimes syscall and without /proc
mounted, glibc futimes fails with errno == ENOENT. Fall back
on utimes if we get a weird error number like that. */
switch (errno)
{
case EACCES:
case EIO:
case EPERM:
case EROFS:
return -1;
}
}
# endif
return utimes (file, t);
# endif
#else
struct utimbuf utimbuf;
struct utimbuf const *t;
if (timespec)
{
utimbuf.actime = timespec[0].tv_sec;
utimbuf.modtime = timespec[1].tv_sec;
t = &utimbuf;
}
else
t = NULL;
return utime (file, t);
#endif
}
/* Set the access and modification time stamps of FILE to be
TIMESPEC[0] and TIMESPEC[1], respectively. */
int
utimens (char const *file, struct timespec const timespec[2])
{
return futimens (-1, file, timespec);
}
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