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 44 static void *threadfunc(void *); 45 46 static void * 47 threadfunc(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 63 ATF_TC(nice_err); 64 ATF_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 71 ATF_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 88 ATF_TC(nice_priority); 89 ATF_TC_HEAD(nice_priority, tc) 90 { 91 atf_tc_set_md_var(tc, "descr", "Test nice(3) vs. getpriority(2)"); 92 } 93 94 ATF_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 __FreeBSD__ 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 } 151 152 ATF_TC(nice_root); 153 ATF_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 } 158 159 ATF_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 } 168 169 ATF_TC(nice_thread); 170 ATF_TC_HEAD(nice_thread, tc) 171 { 172 atf_tc_set_md_var(tc, "descr", "Test nice(3) with threads"); 173 } 174 175 ATF_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 } 206 207 ATF_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