t_spawnattr.c revision 1.1.4.2
1 /* $NetBSD: t_spawnattr.c,v 1.1.4.2 2012/04/17 00:09:11 yamt 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 <atf-c.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <sched.h> 40 #include <signal.h> 41 #include <spawn.h> 42 #include <unistd.h> 43 #include <sys/wait.h> 44 45 #define MAX(a, b) (a) > (b) ? (a) : (b) 46 #define MIN(a, b) (a) > (b) ? (b) : (a) 47 48 static int get_different_scheduler(void); 49 static int get_different_priority(void); 50 51 static int 52 get_different_scheduler() 53 { 54 int scheduler, max, min, new; 55 56 max = MAX(MAX(SCHED_FIFO, SCHED_OTHER), SCHED_RR); 57 min = MIN(MIN(SCHED_FIFO, SCHED_OTHER), SCHED_RR); 58 59 /* get current schedule policy */ 60 scheduler = sched_getscheduler(0); 61 62 /* new scheduler */ 63 new = (scheduler + 1); 64 if (new > max) 65 new = min; 66 67 return new; 68 } 69 70 static int 71 get_different_priority() 72 { 73 int scheduler, max, min, new, priority; 74 struct sched_param param; 75 76 /* get current schedule policy */ 77 scheduler = sched_getscheduler(0); 78 79 max = sched_get_priority_max(scheduler); 80 min = sched_get_priority_min(scheduler); 81 82 sched_getparam(0, ¶m); 83 priority = param.sched_priority; 84 85 /* new schedule policy */ 86 new = (priority + 1); 87 if (new > max) 88 new = min; 89 90 return new; 91 } 92 93 ATF_TC(t_spawnattr); 94 95 ATF_TC_HEAD(t_spawnattr, tc) 96 { 97 atf_tc_set_md_var(tc, "require.user", "root"); 98 atf_tc_set_md_var(tc, "descr", 99 "Tests posix_spawn with scheduler attributes"); 100 } 101 102 ATF_TC_BODY(t_spawnattr, tc) 103 { 104 int pid, scheduler, child_scheduler, priority, status, err, pfd[2]; 105 char helper_arg[128]; 106 char * const args[] = { __UNCONST("h_spawnattr"), helper_arg, NULL }; 107 struct sched_param sp, child_sp; 108 sigset_t sig; 109 posix_spawnattr_t attr; 110 char helper[FILENAME_MAX]; 111 112 /* 113 * create a pipe to controll the child 114 */ 115 err = pipe(pfd); 116 ATF_REQUIRE_MSG(err == 0, "could not create pipe, errno %d", errno); 117 sprintf(helper_arg, "%d", pfd[0]); 118 119 posix_spawnattr_init(&attr); 120 121 scheduler = get_different_scheduler(); 122 priority = get_different_priority(); 123 sp.sched_priority = priority; 124 125 sigemptyset(&sig); 126 sigaddset(&sig, SIGUSR1); 127 128 posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETSCHEDULER | 129 POSIX_SPAWN_SETSCHEDPARAM | POSIX_SPAWN_SETPGROUP | 130 POSIX_SPAWN_SETSIGMASK | POSIX_SPAWN_SETSIGDEF | 131 POSIX_SPAWN_SETSIGDEF); 132 posix_spawnattr_setpgroup(&attr, 0); 133 posix_spawnattr_setschedparam(&attr, &sp); 134 posix_spawnattr_setschedpolicy(&attr, scheduler); 135 posix_spawnattr_setsigmask(&attr, &sig); 136 posix_spawnattr_setsigdefault(&attr, &sig); 137 138 sprintf(helper, "%s/h_spawnattr", 139 atf_tc_get_config_var(tc, "srcdir")); 140 err = posix_spawn(&pid, helper, NULL, &attr, args, NULL); 141 ATF_REQUIRE_MSG(err == 0, "error %d", err); 142 143 child_scheduler = sched_getscheduler(pid); 144 ATF_REQUIRE_MSG(scheduler == child_scheduler, 145 "scheduler = %d, child_scheduler = %d, pid %d, errno %d", 146 scheduler, child_scheduler, pid, errno); 147 148 sched_getparam(pid, &child_sp); 149 ATF_REQUIRE_MSG(child_sp.sched_priority == sp.sched_priority, 150 "priority is: %d, but we requested: %d", 151 child_sp.sched_priority, sp.sched_priority); 152 153 ATF_REQUIRE_MSG(pid == getpgid(pid), "child pid: %d, child pgid: %d", 154 pid, getpgid(pid)); 155 156 /* ready, let child go */ 157 write(pfd[1], "q", 1); 158 close(pfd[0]); 159 close(pfd[1]); 160 161 /* wait and check result from child */ 162 waitpid(pid, &status, 0); 163 ATF_REQUIRE(WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS); 164 165 posix_spawnattr_destroy(&attr); 166 } 167 168 ATF_TP_ADD_TCS(tp) 169 { 170 ATF_TP_ADD_TC(tp, t_spawnattr); 171 172 return atf_no_error(); 173 } 174
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