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