tests/lib/libc/gen/t_alarm.c

   1 /* $NetBSD: t_alarm.c,v 1.2 2011/05/10 06:58:17 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_alarm.c,v 1.2 2011/05/10 06:58:17 jruoho Exp $");
  33
  34 #include <sys/wait.h>
  35
  36 #include <atf-c.h>
  37 #include <stdlib.h>
  38 #include <signal.h>
  39 #include <unistd.h>
  40
  41 static bool     fail;
  42 static void     handler(int);
  43
  44 static void
  45 handler(int signo)
  46 {
  47
  48         if (signo == SIGALRM)
  49                 fail = false;
  50 }
  51
  52 ATF_TC(alarm_basic);
  53 ATF_TC_HEAD(alarm_basic, tc)
  54 {
  55         atf_tc_set_md_var(tc, "descr", "A basic test of alarm(3)");
  56 }
  57
  58 ATF_TC_BODY(alarm_basic, tc)
  59 {
  60
  61         ATF_REQUIRE(signal(SIGALRM, handler) == 0);
  62
  63         fail = true;
  64
  65         (void)alarm(1);
  66         (void)sleep(2);
  67
  68         if (fail != false)
  69                 atf_tc_fail("alarm(3) failed to deliver signal");
  70 }
  71
  72 ATF_TC(alarm_fork);
  73 ATF_TC_HEAD(alarm_fork, tc)
  74 {
  75         atf_tc_set_md_var(tc, "descr", "Does fork(2) clear a pending alarm?");
  76 }
  77
  78 ATF_TC_BODY(alarm_fork, tc)
  79 {
  80         unsigned int rv;
  81         pid_t pid;
  82         int sta;
  83
  84         /*
  85          * Any pending alarms should be
  86          * cleared in the child process.
  87          */
  88         (void)alarm(60);
  89
  90         pid = fork();
  91         ATF_REQUIRE(pid >= 0);
  92
  93         if (pid == 0) {
  94
  95                 rv = alarm(0);
  96
  97                 if (rv != 0)
  98                         _exit(EXIT_FAILURE);
  99
 100                 _exit(EXIT_SUCCESS);
 101         }
 102
 103         (void)alarm(0);
 104         (void)wait(&sta);
 105
 106         if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
 107                 atf_tc_fail("pending alarm was not cleared for child");
 108 }
 109
 110 ATF_TC(alarm_previous);
 111 ATF_TC_HEAD(alarm_previous, tc)
 112 {
 113         atf_tc_set_md_var(tc, "descr", "Test return value from alarm(3)");
 114 }
 115
 116 ATF_TC_BODY(alarm_previous, tc)
 117 {
 118         unsigned int rv;
 119
 120         /*
 121          * See that alarm(3) returns the amount
 122          * left on the timer from the previous call.
 123         */
 124         rv = alarm(60);
 125
 126         if (rv != 0)
 127                 goto fail;
 128
 129         rv = alarm(0);
 130
 131         if (rv < 50)
 132                 goto fail;
 133
 134         (void)alarm(0);
 135
 136         return;
 137
 138 fail:
 139         atf_tc_fail("invalid return value from alarm(3)");
 140 }
 141
 142 ATF_TP_ADD_TCS(tp)
 143 {
 144
 145         ATF_TP_ADD_TC(tp, alarm_basic);
 146         ATF_TP_ADD_TC(tp, alarm_fork);
 147         ATF_TP_ADD_TC(tp, alarm_previous);
 148
 149         return atf_no_error();
 150 }