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__FBSDID("$FreeBSD$");
29
30#include <sys/stat.h>
31
32#include <errno.h>
33#include <fcntl.h>
34#include <time.h>
35
36#ifndef	UTIME_NOW
37#define	UTIME_NOW	-1
38#define	UTIME_OMIT	-2
39#endif
40
41int
42futimens(int fd, const struct timespec times[2])
43{
44	struct timeval now, tv[2], *tvp;
45	struct stat sb;
46	int osreldate;
47
48	if (times == NULL || (times[0].tv_nsec == UTIME_NOW &&
49	    times[1].tv_nsec == UTIME_NOW))
50		tvp = NULL;
51	else if (times[0].tv_nsec == UTIME_OMIT &&
52	    times[1].tv_nsec == UTIME_OMIT)
53		return (0);
54	else {
55		if ((times[0].tv_nsec < 0 || times[0].tv_nsec > 999999999) &&
56		    times[0].tv_nsec != UTIME_NOW &&
57		    times[0].tv_nsec != UTIME_OMIT) {
58			errno = EINVAL;
59			return (-1);
60		}
61		if ((times[1].tv_nsec < 0 || times[1].tv_nsec > 999999999) &&
62		    times[1].tv_nsec != UTIME_NOW &&
63		    times[1].tv_nsec != UTIME_OMIT) {
64			errno = EINVAL;
65			return (-1);
66		}
67		tv[0].tv_sec = times[0].tv_sec;
68		tv[0].tv_usec = times[0].tv_nsec / 1000;
69		tv[1].tv_sec = times[1].tv_sec;
70		tv[1].tv_usec = times[1].tv_nsec / 1000;
71		tvp = tv;
72		if (times[0].tv_nsec == UTIME_OMIT ||
73		    times[1].tv_nsec == UTIME_OMIT) {
74			if (fstat(fd, &sb) == -1)
75				return (-1);
76			if (times[0].tv_nsec == UTIME_OMIT) {
77				tv[0].tv_sec = sb.st_atim.tv_sec;
78				tv[0].tv_usec = sb.st_atim.tv_nsec / 1000;
79			}
80			if (times[1].tv_nsec == UTIME_OMIT) {
81				tv[1].tv_sec = sb.st_mtim.tv_sec;
82				tv[1].tv_usec = sb.st_mtim.tv_nsec / 1000;
83			}
84		}
85		if (times[0].tv_nsec == UTIME_NOW ||
86		    times[1].tv_nsec == UTIME_NOW) {
87			if (gettimeofday(&now, NULL) == -1)
88				return (-1);
89			if (times[0].tv_nsec == UTIME_NOW)
90				tv[0] = now;
91			if (times[1].tv_nsec == UTIME_NOW)
92				tv[1] = now;
93		}
94	}
95	return (futimes(fd, tvp));
96}
97