t_nanosleep.c revision 276478 
1/* $NetBSD: t_nanosleep.c,v 1.3 2013/03/31 16:47:16 christos Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31#include <sys/cdefs.h>
32__RCSID("$NetBSD: t_nanosleep.c,v 1.3 2013/03/31 16:47:16 christos Exp $");
33
34#include <sys/time.h>
35#include <sys/wait.h>
36
37#include <atf-c.h>
38#include <errno.h>
39#include <time.h>
40#include <signal.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <sysexits.h>
45#include <unistd.h>
46
47static void
48#ifdef __FreeBSD__
49handler(int signo __unused)
50#else
51handler(int signo)
52#endif
53{
54	/* Nothing. */
55}
56
57ATF_TC(nanosleep_basic);
58ATF_TC_HEAD(nanosleep_basic, tc)
59{
60	atf_tc_set_md_var(tc, "descr", "Test that nanosleep(2) works");
61}
62
63ATF_TC_BODY(nanosleep_basic, tc)
64{
65	static const size_t maxiter = 10;
66	struct timespec ts1, ts2, tsn;
67	size_t i;
68
69	for (i = 1; i < maxiter; i++) {
70
71		tsn.tv_sec = 0;
72		tsn.tv_nsec = i;
73
74		(void)memset(&ts1, 0, sizeof(struct timespec));
75		(void)memset(&ts2, 0, sizeof(struct timespec));
76
77		ATF_REQUIRE(clock_gettime(CLOCK_MONOTONIC, &ts1) == 0);
78		ATF_REQUIRE(nanosleep(&tsn, NULL) == 0);
79		ATF_REQUIRE(clock_gettime(CLOCK_MONOTONIC, &ts2) == 0);
80
81		/*
82		 * Verify that we slept at least one nanosecond.
83		 */
84		if (timespeccmp(&ts2, &ts1, <=) != 0) {
85
86			(void)fprintf(stderr,
87			    "sleep time:: sec %llu, nsec %lu\n\t\t"
88			    "ts1: sec %llu, nsec %lu\n\t\t"
89			    "ts2: sec %llu, nsec %lu\n",
90			    (unsigned long long)tsn.tv_sec, tsn.tv_nsec,
91			    (unsigned long long)ts1.tv_sec, ts1.tv_nsec,
92			    (unsigned long long)ts2.tv_sec, ts2.tv_nsec);
93
94			atf_tc_fail_nonfatal("inaccuracies in sleep time "
95			    "(resolution = %lu nsec)", tsn.tv_nsec);
96		}
97	}
98}
99
100ATF_TC(nanosleep_err);
101ATF_TC_HEAD(nanosleep_err, tc)
102{
103	atf_tc_set_md_var(tc, "descr",
104	    "Test errors from nanosleep(2) (PR bin/14558)");
105}
106
107ATF_TC_BODY(nanosleep_err, tc)
108{
109	struct timespec ts;
110
111	ts.tv_sec = 1;
112	ts.tv_nsec = -1;
113	errno = 0;
114	ATF_REQUIRE_ERRNO(EINVAL, nanosleep(&ts, NULL) == -1);
115
116	ts.tv_sec = 1;
117	ts.tv_nsec = 1000000000;
118	errno = 0;
119	ATF_REQUIRE_ERRNO(EINVAL, nanosleep(&ts, NULL) == -1);
120
121	ts.tv_sec = -1;
122	ts.tv_nsec = 0;
123	errno = 0;
124	ATF_REQUIRE_ERRNO(0, nanosleep(&ts, NULL) == 0);
125
126	errno = 0;
127	ATF_REQUIRE_ERRNO(EFAULT, nanosleep((void *)-1, NULL) == -1);
128}
129
130ATF_TC(nanosleep_sig);
131ATF_TC_HEAD(nanosleep_sig, tc)
132{
133	atf_tc_set_md_var(tc, "descr", "Test signal for nanosleep(2)");
134}
135
136ATF_TC_BODY(nanosleep_sig, tc)
137{
138	struct timespec tsn, tsr;
139	pid_t pid;
140	int sta;
141
142	/*
143	 * Test that a signal interrupts nanosleep(2).
144	 *
145	 * (In which case the return value should be -1 and the
146	 * second parameter should contain the unslept time.)
147	 */
148	pid = fork();
149
150	ATF_REQUIRE(pid >= 0);
151	ATF_REQUIRE(signal(SIGINT, handler) == 0);
152
153	if (pid == 0) {
154
155		tsn.tv_sec = 10;
156		tsn.tv_nsec = 0;
157
158		tsr.tv_sec = 0;
159		tsr.tv_nsec = 0;
160
161		errno = 0;
162
163		if (nanosleep(&tsn, &tsr) != -1)
164			_exit(EXIT_FAILURE);
165
166		if (errno != EINTR)
167			_exit(EXIT_FAILURE);
168
169		if (tsr.tv_sec == 0 && tsr.tv_nsec == 0)
170			_exit(EXIT_FAILURE);
171
172		_exit(EXIT_SUCCESS);
173	}
174
175	(void)sleep(1);
176	(void)kill(pid, SIGINT);
177	(void)wait(&sta);
178
179	if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
180		atf_tc_fail("signal did not interrupt nanosleep(2)");
181}
182
183ATF_TP_ADD_TCS(tp)
184{
185
186	ATF_TP_ADD_TC(tp, nanosleep_basic);
187	ATF_TP_ADD_TC(tp, nanosleep_err);
188	ATF_TP_ADD_TC(tp, nanosleep_sig);
189
190	return atf_no_error();
191}
192