t_nice.c revision 313498 
1/*	$NetBSD: t_nice.c,v 1.8 2012/03/18 07:00:51 jruoho 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_nice.c,v 1.8 2012/03/18 07:00:51 jruoho Exp $");
33
34#include <sys/resource.h>
35#include <sys/wait.h>
36
37#include <atf-c.h>
38#include <errno.h>
39#include <limits.h>
40#include <pthread.h>
41#include <stdlib.h>
42#include <unistd.h>
43
44static void	*threadfunc(void *);
45
46static void *
47threadfunc(void *arg)
48{
49	int pri, val;
50
51	val = *(int *)arg;
52
53	errno = 0;
54	pri = getpriority(PRIO_PROCESS, 0);
55	ATF_REQUIRE(errno == 0);
56
57	if (pri != val)
58		atf_tc_fail("nice(3) value was not propagated to threads");
59
60	return NULL;
61}
62
63ATF_TC(nice_err);
64ATF_TC_HEAD(nice_err, tc)
65{
66	atf_tc_set_md_var(tc, "descr",
67	    "Test nice(3) for invalid parameters (PR lib/42587)");
68	atf_tc_set_md_var(tc, "require.user", "unprivileged");
69}
70
71ATF_TC_BODY(nice_err, tc)
72{
73	int i;
74
75	/*
76	 * The call should fail with EPERM if the
77	 * supplied parameter is negative and the
78	 * caller does not have privileges.
79	 */
80	for (i = -20; i < 0; i++) {
81
82		errno = 0;
83
84		ATF_REQUIRE_ERRNO(EPERM, nice(i) == -1);
85	}
86}
87
88ATF_TC(nice_priority);
89ATF_TC_HEAD(nice_priority, tc)
90{
91	atf_tc_set_md_var(tc, "descr", "Test nice(3) vs. getpriority(2)");
92}
93
94ATF_TC_BODY(nice_priority, tc)
95{
96#ifdef __FreeBSD__
97	int i, pri, pri2, nic;
98#else
99	int i, pri, nic;
100#endif
101	pid_t pid;
102	int sta;
103
104	for (i = 0; i <= 20; i++) {
105
106		nic = nice(i);
107		ATF_REQUIRE(nic != -1);
108
109		errno = 0;
110		pri = getpriority(PRIO_PROCESS, 0);
111		ATF_REQUIRE(errno == 0);
112
113#ifdef __NetBSD__
114		if (nic != pri)
115			atf_tc_fail("nice(3) and getpriority(2) conflict");
116#endif
117
118		/*
119		 * Also verify that the nice(3) values
120		 * are inherited by child processes.
121		 */
122		pid = fork();
123		ATF_REQUIRE(pid >= 0);
124
125		if (pid == 0) {
126
127			errno = 0;
128#ifdef __NetBSD__
129			pri = getpriority(PRIO_PROCESS, 0);
130#else
131			pri2 = getpriority(PRIO_PROCESS, 0);
132#endif
133			ATF_REQUIRE(errno == 0);
134
135#ifdef __FreeBSD__
136			if (pri != pri2)
137#else
138			if (nic != pri)
139#endif
140				_exit(EXIT_FAILURE);
141
142			_exit(EXIT_SUCCESS);
143		}
144
145		(void)wait(&sta);
146
147		if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
148			atf_tc_fail("nice(3) value was not inherited");
149	}
150}
151
152ATF_TC(nice_root);
153ATF_TC_HEAD(nice_root, tc)
154{
155	atf_tc_set_md_var(tc, "descr", "Test that nice(3) works");
156	atf_tc_set_md_var(tc, "require.user", "root");
157}
158
159ATF_TC_BODY(nice_root, tc)
160{
161	int i;
162
163	for (i = -20; i <= 20; i++) {
164
165		ATF_REQUIRE(nice(i) != -1);
166	}
167}
168
169ATF_TC(nice_thread);
170ATF_TC_HEAD(nice_thread, tc)
171{
172	atf_tc_set_md_var(tc, "descr", "Test nice(3) with threads");
173}
174
175ATF_TC_BODY(nice_thread, tc)
176{
177	pthread_t tid[5];
178#ifdef __FreeBSD__
179	int pri, rv, val;
180#else
181	int rv, val;
182#endif
183	size_t i;
184
185	/*
186	 * Test that the scheduling priority is
187	 * propagated to all system scope threads.
188	 */
189	for (i = 0; i < __arraycount(tid); i++) {
190
191		val = nice(i);
192		ATF_REQUIRE(val != -1);
193
194#ifdef __FreeBSD__
195		pri = getpriority(PRIO_PROCESS, 0);
196		rv = pthread_create(&tid[i], NULL, threadfunc, &pri);
197#else
198		rv = pthread_create(&tid[i], NULL, threadfunc, &val);
199#endif
200		ATF_REQUIRE(rv == 0);
201
202		rv = pthread_join(tid[i], NULL);
203		ATF_REQUIRE(rv == 0);
204	}
205}
206
207ATF_TP_ADD_TCS(tp)
208{
209
210	ATF_TP_ADD_TC(tp, nice_err);
211	ATF_TP_ADD_TC(tp, nice_priority);
212	ATF_TP_ADD_TC(tp, nice_root);
213	ATF_TP_ADD_TC(tp, nice_thread);
214
215	return atf_no_error();
216}
217