1/*-
2 * Copyright (c) 2015 Jilles Tjoelker
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28#include <sys/stat.h>
29
30#include <errno.h>
31#include <fcntl.h>
32#include <time.h>
33
34#ifndef	UTIME_NOW
35#define	UTIME_NOW	-1
36#define	UTIME_OMIT	-2
37#endif
38
39int
40futimens(int fd, const struct timespec times[2])
41{
42	struct timeval now, tv[2], *tvp;
43	struct stat sb;
44	int osreldate;
45
46	if (times == NULL || (times[0].tv_nsec == UTIME_NOW &&
47	    times[1].tv_nsec == UTIME_NOW))
48		tvp = NULL;
49	else if (times[0].tv_nsec == UTIME_OMIT &&
50	    times[1].tv_nsec == UTIME_OMIT)
51		return (0);
52	else {
53		if ((times[0].tv_nsec < 0 || times[0].tv_nsec > 999999999) &&
54		    times[0].tv_nsec != UTIME_NOW &&
55		    times[0].tv_nsec != UTIME_OMIT) {
56			errno = EINVAL;
57			return (-1);
58		}
59		if ((times[1].tv_nsec < 0 || times[1].tv_nsec > 999999999) &&
60		    times[1].tv_nsec != UTIME_NOW &&
61		    times[1].tv_nsec != UTIME_OMIT) {
62			errno = EINVAL;
63			return (-1);
64		}
65		tv[0].tv_sec = times[0].tv_sec;
66		tv[0].tv_usec = times[0].tv_nsec / 1000;
67		tv[1].tv_sec = times[1].tv_sec;
68		tv[1].tv_usec = times[1].tv_nsec / 1000;
69		tvp = tv;
70		if (times[0].tv_nsec == UTIME_OMIT ||
71		    times[1].tv_nsec == UTIME_OMIT) {
72			if (fstat(fd, &sb) == -1)
73				return (-1);
74			if (times[0].tv_nsec == UTIME_OMIT) {
75				tv[0].tv_sec = sb.st_atim.tv_sec;
76				tv[0].tv_usec = sb.st_atim.tv_nsec / 1000;
77			}
78			if (times[1].tv_nsec == UTIME_OMIT) {
79				tv[1].tv_sec = sb.st_mtim.tv_sec;
80				tv[1].tv_usec = sb.st_mtim.tv_nsec / 1000;
81			}
82		}
83		if (times[0].tv_nsec == UTIME_NOW ||
84		    times[1].tv_nsec == UTIME_NOW) {
85			if (gettimeofday(&now, NULL) == -1)
86				return (-1);
87			if (times[0].tv_nsec == UTIME_NOW)
88				tv[0] = now;
89			if (times[1].tv_nsec == UTIME_NOW)
90				tv[1] = now;
91		}
92	}
93	return (futimes(fd, tvp));
94}
95