1 /* $NetBSD: t_nice.c,v 1.5 2011/04/17 06:18:23 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 1.5 2011/04/17 06:18:23 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", "Test nice(3) for invalid parameters"); 67 atf_tc_set_md_var(tc, "require.user", "unprivileged"); 68 } 69 70 ATF_TC_BODY(nice_err, tc) 71 { 72 int i; 73 74 /* 75 * The call should fail with EPERM if the 76 * supplied parameter is negative and the 77 * caller does not have privileges. Note 78 * that the errno is thus "wrong" in NetBSD. 79 */ 80 atf_tc_expect_fail("PR lib/42587"); 81 82 for (i = -20; i < 0; i++) { 83 84 errno = 0; 85 86 ATF_REQUIRE(nice(i) == -1); 87 88 if (errno != EPERM) 89 atf_tc_fail("wrong errno"); 90 } 91 } 92 93 ATF_TC(nice_priority); 94 ATF_TC_HEAD(nice_priority, tc) 95 { 96 atf_tc_set_md_var(tc, "descr", "Test nice(3) vs. getpriority(2)"); 97 } 98 99 ATF_TC_BODY(nice_priority, tc) 100 { 101 int i, pri, nic; 102 pid_t pid; 103 int sta; 104 105 for (i = 0; i <= 20; i++) { 106 107 nic = nice(i); 108 ATF_REQUIRE(nic != -1); 109 110 errno = 0; 111 pri = getpriority(PRIO_PROCESS, 0); 112 ATF_REQUIRE(errno == 0); 113 114 if (nic != pri) 115 atf_tc_fail("nice(3) and getpriority(2) conflict"); 116 117 /* 118 * Also verify that the nice(3) values 119 * are inherited by child processes. 120 */ 121 pid = fork(); 122 ATF_REQUIRE(pid >= 0); 123 124 if (pid == 0) { 125 126 errno = 0; 127 pri = getpriority(PRIO_PROCESS, 0); 128 ATF_REQUIRE(errno == 0); 129 130 if (nic != pri) 131 _exit(EXIT_FAILURE); 132 133 _exit(EXIT_SUCCESS); 134 } 135 136 (void)wait(&sta); 137 138 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS) 139 atf_tc_fail("nice(3) value was not inherited"); 140 } 141 } 142 143 ATF_TC(nice_root); 144 ATF_TC_HEAD(nice_root, tc) 145 { 146 atf_tc_set_md_var(tc, "descr", "Test that nice(3) works"); 147 atf_tc_set_md_var(tc, "require.user", "root"); 148 } 149 150 ATF_TC_BODY(nice_root, tc) 151 { 152 int i; 153 154 for (i = -20; i <= 20; i++) { 155 156 ATF_REQUIRE(nice(i) != -1); 157 } 158 } 159 160 ATF_TC(nice_thread); 161 ATF_TC_HEAD(nice_thread, tc) 162 { 163 atf_tc_set_md_var(tc, "descr", "Test nice(3) with threads"); 164 } 165 166 ATF_TC_BODY(nice_thread, tc) 167 { 168 pthread_t tid[5]; 169 int rv, val; 170 size_t i; 171 172 /* 173 * Test that the scheduling priority is 174 * propagated to all system scope threads. 175 */ 176 for (i = 0; i < __arraycount(tid); i++) { 177 178 val = nice(i); 179 ATF_REQUIRE(val != -1); 180 181 rv = pthread_create(&tid[i], NULL, threadfunc, &val); 182 ATF_REQUIRE(rv == 0); 183 184 rv = pthread_join(tid[i], NULL); 185 ATF_REQUIRE(rv == 0); 186 } 187 } 188 189 ATF_TP_ADD_TCS(tp) 190 { 191 192 ATF_TP_ADD_TC(tp, nice_err); 193 ATF_TP_ADD_TC(tp, nice_priority); 194 ATF_TP_ADD_TC(tp, nice_root); 195 ATF_TP_ADD_TC(tp, nice_thread); 196 197 return atf_no_error(); 198 } 199