1 /* $NetBSD: t_spawnattr.c,v 1.7 2025/03/16 15:35:36 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles Zhang <charles (at) NetBSD.org> and 9 * Martin Husemann <martin (at) NetBSD.org>. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __RCSID("$NetBSD: t_spawnattr.c,v 1.7 2025/03/16 15:35:36 riastradh Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/wait.h> 38 39 #include <atf-c.h> 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <sched.h> 43 #include <signal.h> 44 #include <spawn.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 50 #include "h_macros.h" 51 52 static int 53 get_different_scheduler(void) 54 { 55 int sched; 56 57 /* 58 * We don't want to use SCHED_OTHER because it does not have 59 * different priorities. 60 */ 61 62 /* get current schedule policy */ 63 RL(sched = sched_getscheduler(0)); 64 switch (sched) { 65 case SCHED_RR: 66 return SCHED_FIFO; 67 case SCHED_FIFO: 68 case SCHED_OTHER: 69 return SCHED_RR; 70 default: 71 abort(); 72 } 73 } 74 75 static int 76 get_different_priority(int scheduler) 77 { 78 int min, max, new, priority; 79 struct sched_param param; 80 81 /* Get the priority range for the new scheduler */ 82 RL(max = sched_get_priority_max(scheduler)); 83 RL(min = sched_get_priority_min(scheduler)); 84 85 RL(sched_getparam(0, ¶m)); 86 priority = param.sched_priority; 87 88 /* new schedule policy */ 89 for (new = min; new <= max; new++) 90 if (priority != new) 91 break; 92 93 ATF_REQUIRE_MSG(priority != new, "could not find different priority"); 94 printf("min %d max %d for scheduler %d, returning %d\n", 95 min, max, scheduler, new); 96 return new; 97 } 98 99 ATF_TC(t_spawnattr); 100 ATF_TC_HEAD(t_spawnattr, tc) 101 { 102 atf_tc_set_md_var(tc, "require.user", "root"); 103 atf_tc_set_md_var(tc, "descr", 104 "Tests posix_spawn with scheduler attributes"); 105 } 106 ATF_TC_BODY(t_spawnattr, tc) 107 { 108 int pid, scheduler, child_scheduler, priority, status, pfd[2]; 109 char helper_arg[128]; 110 char * const args[] = { __UNCONST("h_spawnattr"), helper_arg, NULL }; 111 struct sched_param sp, child_sp; 112 sigset_t sig; 113 posix_spawnattr_t attr; 114 char helper[FILENAME_MAX]; 115 116 /* 117 * create a pipe to control the child 118 */ 119 RL(pipe(pfd)); 120 snprintf(helper_arg, sizeof(helper_arg), "%d", pfd[0]); 121 122 RZ(posix_spawnattr_init(&attr)); 123 124 scheduler = get_different_scheduler(); 125 priority = get_different_priority(scheduler); 126 sp.sched_priority = priority; 127 printf("using scheduler %d, priority %d\n", scheduler, priority); 128 129 RL(sigemptyset(&sig)); 130 RL(sigaddset(&sig, SIGUSR1)); 131 132 RZ(posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETSCHEDULER | 133 POSIX_SPAWN_SETSCHEDPARAM | POSIX_SPAWN_SETPGROUP | 134 POSIX_SPAWN_SETSIGMASK | POSIX_SPAWN_SETSIGDEF | 135 POSIX_SPAWN_SETSIGDEF)); 136 RZ(posix_spawnattr_setpgroup(&attr, 0)); 137 RZ(posix_spawnattr_setschedparam(&attr, &sp)); 138 RZ(posix_spawnattr_setschedpolicy(&attr, scheduler)); 139 RZ(posix_spawnattr_setsigmask(&attr, &sig)); 140 RZ(posix_spawnattr_setsigdefault(&attr, &sig)); 141 142 snprintf(helper, sizeof(helper), "%s/h_spawnattr", 143 atf_tc_get_config_var(tc, "srcdir")); 144 RZ(posix_spawn(&pid, helper, NULL, &attr, args, NULL)); 145 ATF_REQUIRE_MSG(pid > 0, "pid=%lld", (long long)pid); 146 147 RL(child_scheduler = sched_getscheduler(pid)); 148 ATF_REQUIRE_MSG(scheduler == child_scheduler, 149 "scheduler = %d, child_scheduler = %d, pid %d, errno %d", 150 scheduler, child_scheduler, pid, errno); 151 152 RL(sched_getparam(pid, &child_sp)); 153 ATF_REQUIRE_MSG(child_sp.sched_priority == sp.sched_priority, 154 "priority is: %d, but we requested: %d", 155 child_sp.sched_priority, sp.sched_priority); 156 157 ATF_REQUIRE_MSG(pid == getpgid(pid), "child pid: %d, child pgid: %d", 158 pid, getpgid(pid)); 159 160 /* ready, let child go */ 161 RL(write(pfd[1], "q", 1)); 162 RL(close(pfd[0])); 163 RL(close(pfd[1])); 164 165 /* wait and check result from child */ 166 RL(waitpid(pid, &status, 0)); 167 ATF_REQUIRE(WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS); 168 169 RZ(posix_spawnattr_destroy(&attr)); 170 } 171 172 ATF_TC(t_spawn_resetids); 173 174 ATF_TC_HEAD(t_spawn_resetids, tc) 175 { 176 atf_tc_set_md_var(tc, "descr", 177 "posix_spawn a child and with POSIX_SPAWN_RESETIDS flag"); 178 } 179 180 ATF_TC_BODY(t_spawn_resetids, tc) 181 { 182 char buf[FILENAME_MAX]; 183 char * const args[] = { 184 __UNCONST("h_spawn"), __UNCONST("--resetids"), NULL 185 }; 186 posix_spawnattr_t attr; 187 int status; 188 pid_t pid; 189 190 RZ(posix_spawnattr_init(&attr)); 191 RZ(posix_spawnattr_setflags(&attr, POSIX_SPAWN_RESETIDS)); 192 193 snprintf(buf, sizeof(buf), "%s/h_spawn", 194 atf_tc_get_config_var(tc, "srcdir")); 195 196 RZ(posix_spawn(&pid, buf, NULL, &attr, args, NULL)); 197 ATF_REQUIRE_MSG(pid > 0, "pid=%lld", (long long)pid); 198 RL(waitpid(pid, &status, 0)); 199 ATF_REQUIRE_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 0, 200 "status=0x%x", status); 201 202 RZ(posix_spawnattr_destroy(&attr)); 203 } 204 205 ATF_TP_ADD_TCS(tp) 206 { 207 ATF_TP_ADD_TC(tp, t_spawnattr); 208 ATF_TP_ADD_TC(tp, t_spawn_resetids); 209 210 return atf_no_error(); 211 } 212
Indexes created Thu Sep 25 02:09:54 GMT 2025