tests/lib/libc/sys/t_sigaction.c

   1 /* $NetBSD: t_sigaction.c,v 1.3 2014/11/04 00:20:19 justin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2010 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __COPYRIGHT("@(#) Copyright (c) 2010\
  31  The NetBSD Foundation, inc. All rights reserved.");
  32 __RCSID("$NetBSD: t_sigaction.c,v 1.3 2014/11/04 00:20:19 justin Exp $");
  33
  34 #include <sys/wait.h>
  35
  36 #include <signal.h>
  37 #include <stdbool.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40 #include <unistd.h>
  41
  42 #include <atf-c.h>
  43
  44 #include "../../../h_macros.h"
  45
  46 static bool handler_called = false;
  47
  48 static void
  49 handler(int signo)
  50 {
  51     handler_called = true;
  52 }
  53
  54 static void
  55 sa_resethand_child(const int flags)
  56 {
  57     struct sigaction sa;
  58
  59     sa.sa_flags = flags;
  60     sa.sa_handler = &handler;
  61     sigemptyset(&sa.sa_mask);
  62
  63     sigaction(SIGUSR1, &sa, NULL);
  64     kill(getpid(), SIGUSR1);
  65     exit(handler_called ? EXIT_SUCCESS : EXIT_FAILURE);
  66 }
  67
  68 static void
  69 wait_and_check_child(const pid_t pid, const char *fail_message)
  70 {
  71         int status;
  72
  73         (void)waitpid(pid, &status, 0);
  74
  75         if (WIFEXITED(status))
  76                 ATF_CHECK_EQ(EXIT_SUCCESS, WEXITSTATUS(status));
  77         else
  78                 atf_tc_fail("%s; raw exit status was %d", fail_message, status);
  79 }
  80
  81 static void
  82 catch(int sig)
  83 {
  84         return;
  85 }
  86
  87 ATF_TC(sigaction_basic);
  88 ATF_TC_HEAD(sigaction_basic, tc)
  89 {
  90
  91         atf_tc_set_md_var(tc, "descr", "Checks for correct I&D cache"
  92             "synchronization after copying out the trampoline code.");
  93 }
  94
  95 ATF_TC_BODY(sigaction_basic, tc)
  96 {
  97         static struct sigaction sa;
  98
  99         sa.sa_handler = catch;
 100
 101         sigaction(SIGUSR1, &sa, 0);
 102         kill(getpid(), SIGUSR1);
 103         atf_tc_pass();
 104 }
 105
 106 ATF_TC(sigaction_noflags);
 107 ATF_TC_HEAD(sigaction_noflags, tc)
 108 {
 109         atf_tc_set_md_var(tc, "descr", "Checks programming a signal with "
 110             "sigaction(2) but without any flags");
 111 }
 112
 113 ATF_TC_BODY(sigaction_noflags, tc)
 114 {
 115         const pid_t pid = fork();
 116         if (pid == -1)
 117                 atf_tc_fail_errno("fork(2) failed");
 118         else if (pid == 0)
 119                 sa_resethand_child(0);
 120         else
 121                 wait_and_check_child(pid, "Child process did not exit cleanly;"
 122                     " it failed to process the signal");
 123 }
 124
 125 ATF_TC(sigaction_resethand);
 126 ATF_TC_HEAD(sigaction_resethand, tc)
 127 {
 128         atf_tc_set_md_var(tc, "descr", "Checks that SA_RESETHAND works");
 129 }
 130
 131 ATF_TC_BODY(sigaction_resethand, tc)
 132 {
 133         const pid_t pid = fork();
 134         if (pid == -1)
 135                 atf_tc_fail_errno("fork(2) failed");
 136         else if (pid == 0)
 137                 sa_resethand_child(SA_RESETHAND);
 138         else {
 139                 wait_and_check_child(pid, "Child process did not exit cleanly;"
 140                     " it either failed to process the signal or SA_RESETHAND"
 141                     " is broken");
 142         }
 143 }
 144
 145 ATF_TP_ADD_TCS(tp)
 146 {
 147
 148         ATF_TP_ADD_TC(tp, sigaction_basic);
 149         ATF_TP_ADD_TC(tp, sigaction_noflags);
 150         ATF_TP_ADD_TC(tp, sigaction_resethand);
 151
 152         return atf_no_error();
 153 }