tests/lib/libc/gen/posix_spawn/t_spawnattr.c

   1 /* $NetBSD: t_spawnattr.c,v 1.1 2012/02/13 21:03:08 martin 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@NetBSD.org> and
   9  * Martin Husemann <martin@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, &param);
  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 }