priv_clock_settime.c revision 162271 
1/*-
2 * Copyright (c) 2006 nCircle Network Security, Inc.
3 * All rights reserved.
4 *
5 * This software was developed by Robert N. M. Watson for the TrustedBSD
6 * Project under contract to nCircle Network Security, Inc.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
21 * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
23 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD: head/tools/regression/priv/priv_clock_settime.c 162271 2006-09-13 09:05:39Z rwatson $
30 */
31
32/*
33 * Confirm that privilege is required to invoke clock_settime().  So as not
34 * to mess up the clock too much, first query the time, then immediately set
35 * it.  Test only CLOCK_REALTIME.
36 */
37
38#include <sys/time.h>
39
40#include <err.h>
41#include <errno.h>
42#include <unistd.h>
43
44#include "main.h"
45
46void
47priv_clock_settime(void)
48{
49	struct timespec ts;
50	int error;
51
52	assert_root();
53
54	/*
55	 * Query time.
56	 */
57	if (clock_gettime(CLOCK_REALTIME, &ts) < 0)
58		err(-1, "clock_gettime");
59
60	/*
61	 * Set with privilege.
62	 */
63	if (clock_settime(CLOCK_REALTIME, &ts) < 0)
64		err(-1, "clock_settime as root");
65
66	/*
67	 * Set without privilege.
68	 */
69	set_euid(UID_OTHER);
70
71	error = clock_settime(CLOCK_REALTIME, &ts);
72	if (error == 0)
73		errx(-1, "clock_settime succeeded as !root");
74	if (errno != EPERM)
75		errx(-1, "clock_settime wrong errno %d as !root", errno);
76}
77