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107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/*-
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* Copyright (c) 2015 Jilles Tjoelker
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <time.h>
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#ifndef UTIME_NOW
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#define UTIME_NOW -1
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#define UTIME_OMIT -2
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#endif
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int
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utimensat(int fd, const char *path, const struct timespec times[2], int flag)
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{
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struct timeval now, tv[2], *tvp;
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struct stat sb;
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int osreldate;
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if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) {
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errno = EINVAL;
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return (-1);
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}
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if (times == NULL || (times[0].tv_nsec == UTIME_NOW &&
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times[1].tv_nsec == UTIME_NOW))
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tvp = NULL;
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else if (times[0].tv_nsec == UTIME_OMIT &&
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times[1].tv_nsec == UTIME_OMIT)
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return (0);
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else {
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if ((times[0].tv_nsec < 0 || times[0].tv_nsec > 999999999) &&
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times[0].tv_nsec != UTIME_NOW &&
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times[0].tv_nsec != UTIME_OMIT) {
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errno = EINVAL;
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return (-1);
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}
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if ((times[1].tv_nsec < 0 || times[1].tv_nsec > 999999999) &&
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times[1].tv_nsec != UTIME_NOW &&
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times[1].tv_nsec != UTIME_OMIT) {
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errno = EINVAL;
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return (-1);
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}
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tv[0].tv_sec = times[0].tv_sec;
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tv[0].tv_usec = times[0].tv_nsec / 1000;
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tv[1].tv_sec = times[1].tv_sec;
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tv[1].tv_usec = times[1].tv_nsec / 1000;
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tvp = tv;
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if (times[0].tv_nsec == UTIME_OMIT ||
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times[1].tv_nsec == UTIME_OMIT) {
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if (fstatat(fd, path, &sb, flag) == -1)
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return (-1);
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if (times[0].tv_nsec == UTIME_OMIT) {
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tv[0].tv_sec = sb.st_atim.tv_sec;
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tv[0].tv_usec = sb.st_atim.tv_nsec / 1000;
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}
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if (times[1].tv_nsec == UTIME_OMIT) {
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tv[1].tv_sec = sb.st_mtim.tv_sec;
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tv[1].tv_usec = sb.st_mtim.tv_nsec / 1000;
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}
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}
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if (times[0].tv_nsec == UTIME_NOW ||
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times[1].tv_nsec == UTIME_NOW) {
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if (gettimeofday(&now, NULL) == -1)
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return (-1);
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if (times[0].tv_nsec == UTIME_NOW)
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tv[0] = now;
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if (times[1].tv_nsec == UTIME_NOW)
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tv[1] = now;
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}
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}
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if ((flag & AT_SYMLINK_NOFOLLOW) == 0)
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return (futimesat(fd, path, tvp));
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else if ((flag & AT_SYMLINK_NOFOLLOW) != 0 &&
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(fd == AT_FDCWD || path[0] == '/'))
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return (lutimes(path, tvp));
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else {
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errno = ENOTSUP;
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return (-1);
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}
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}
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