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      1 /* $NetBSD: t_sigaction.c,v 1.5 2017/01/13 21:30:41 christos 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 1.5 2017/01/13 21:30:41 christos 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 __unused)
     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 __unused)
     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 }
    154