futimens.c revision 293474 
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: stable/10/lib/libc/sys/futimens.c 293474 2016-01-09 14:20:23Z dchagin $");
29
30#include "namespace.h"
31#include <sys/stat.h>
32
33#include <errno.h>
34#include <fcntl.h>
35#include <time.h>
36#include "un-namespace.h"
37
38#include "libc_private.h"
39
40int
41futimens(int fd, const struct timespec times[2])
42{
43	struct timeval now, tv[2], *tvp;
44	struct stat sb;
45
46	if (__getosreldate() >= 1100056)
47		return (__sys_futimens(fd, times));
48
49	if (times == NULL || (times[0].tv_nsec == UTIME_NOW &&
50	    times[1].tv_nsec == UTIME_NOW))
51		tvp = NULL;
52	else if (times[0].tv_nsec == UTIME_OMIT &&
53	    times[1].tv_nsec == UTIME_OMIT)
54		return (0);
55	else {
56		if ((times[0].tv_nsec < 0 || times[0].tv_nsec > 999999999) &&
57		    times[0].tv_nsec != UTIME_NOW &&
58		    times[0].tv_nsec != UTIME_OMIT) {
59			errno = EINVAL;
60			return (-1);
61		}
62		if ((times[1].tv_nsec < 0 || times[1].tv_nsec > 999999999) &&
63		    times[1].tv_nsec != UTIME_NOW &&
64		    times[1].tv_nsec != UTIME_OMIT) {
65			errno = EINVAL;
66			return (-1);
67		}
68		tv[0].tv_sec = times[0].tv_sec;
69		tv[0].tv_usec = times[0].tv_nsec / 1000;
70		tv[1].tv_sec = times[1].tv_sec;
71		tv[1].tv_usec = times[1].tv_nsec / 1000;
72		tvp = tv;
73		if (times[0].tv_nsec == UTIME_OMIT ||
74		    times[1].tv_nsec == UTIME_OMIT) {
75			if (_fstat(fd, &sb) == -1)
76				return (-1);
77			if (times[0].tv_nsec == UTIME_OMIT) {
78				tv[0].tv_sec = sb.st_atim.tv_sec;
79				tv[0].tv_usec = sb.st_atim.tv_nsec / 1000;
80			}
81			if (times[1].tv_nsec == UTIME_OMIT) {
82				tv[1].tv_sec = sb.st_mtim.tv_sec;
83				tv[1].tv_usec = sb.st_mtim.tv_nsec / 1000;
84			}
85		}
86		if (times[0].tv_nsec == UTIME_NOW ||
87		    times[1].tv_nsec == UTIME_NOW) {
88			if (gettimeofday(&now, NULL) == -1)
89				return (-1);
90			if (times[0].tv_nsec == UTIME_NOW)
91				tv[0] = now;
92			if (times[1].tv_nsec == UTIME_NOW)
93				tv[1] = now;
94		}
95	}
96	return (futimes(fd, tvp));
97}
98