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t_sigaction.c revision 1.2 
      1 /* $NetBSD: t_sigaction.c,v 1.2 2012/11/07 16:51:16 pgoyette 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 1.2 2012/11/07 16:51:16 pgoyette 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 #include <atf-c/config.h>
     44 
     45 #include "../../../h_macros.h"
     46 
     47 static bool handler_called = false;
     48 
     49 static void
     50 handler(int signo)
     51 {
     52     handler_called = true;
     53 }
     54 
     55 static void
     56 sa_resethand_child(const int flags)
     57 {
     58     struct sigaction sa;
     59 
     60     sa.sa_flags = flags;
     61     sa.sa_handler = &handler;
     62     sigemptyset(&sa.sa_mask);
     63 
     64     sigaction(SIGUSR1, &sa, NULL);
     65     kill(getpid(), SIGUSR1);
     66     exit(handler_called ? EXIT_SUCCESS : EXIT_FAILURE);
     67 }
     68 
     69 static void
     70 wait_and_check_child(const pid_t pid, const char *fail_message)
     71 {
     72 	int status;
     73 
     74 	(void)waitpid(pid, &status, 0);
     75 
     76 	if (WIFEXITED(status))
     77 		ATF_CHECK_EQ(EXIT_SUCCESS, WEXITSTATUS(status));
     78 	else
     79 		atf_tc_fail("%s; raw exit status was %d", fail_message, status);
     80 }
     81 
     82 static void
     83 catch(int sig)
     84 {
     85 	return;
     86 }
     87 
     88 ATF_TC(sigaction_basic);
     89 ATF_TC_HEAD(sigaction_basic, tc)
     90 {
     91 
     92 	atf_tc_set_md_var(tc, "descr", "Checks for correct I&D cache"
     93 	    "synchronization after copying out the trampoline code.");
     94 }
     95 
     96 ATF_TC_BODY(sigaction_basic, tc)
     97 {
     98 	static struct sigaction sa;
     99 
    100 	sa.sa_handler = catch;
    101 
    102 	sigaction(SIGUSR1, &sa, 0);
    103 	kill(getpid(), SIGUSR1);
    104 	atf_tc_pass();
    105 }
    106 
    107 ATF_TC(sigaction_noflags);
    108 ATF_TC_HEAD(sigaction_noflags, tc)
    109 {
    110 	atf_tc_set_md_var(tc, "descr", "Checks programming a signal with "
    111 	    "sigaction(2) but without any flags");
    112 }
    113 
    114 ATF_TC_BODY(sigaction_noflags, tc)
    115 {
    116 	const pid_t pid = fork();
    117 	if (pid == -1)
    118 		atf_tc_fail_errno("fork(2) failed");
    119 	else if (pid == 0)
    120 		sa_resethand_child(0);
    121 	else
    122 		wait_and_check_child(pid, "Child process did not exit cleanly;"
    123 		    " it failed to process the signal");
    124 }
    125 
    126 ATF_TC(sigaction_resethand);
    127 ATF_TC_HEAD(sigaction_resethand, tc)
    128 {
    129 	atf_tc_set_md_var(tc, "descr", "Checks that SA_RESETHAND works");
    130 }
    131 
    132 ATF_TC_BODY(sigaction_resethand, tc)
    133 {
    134 	const pid_t pid = fork();
    135 	if (pid == -1)
    136 		atf_tc_fail_errno("fork(2) failed");
    137 	else if (pid == 0)
    138 		sa_resethand_child(SA_RESETHAND);
    139 	else {
    140 		wait_and_check_child(pid, "Child process did not exit cleanly;"
    141 		    " it either failed to process the signal or SA_RESETHAND"
    142 		    " is broken");
    143 	}
    144 }
    145 
    146 ATF_TP_ADD_TCS(tp)
    147 {
    148 
    149 	ATF_TP_ADD_TC(tp, sigaction_basic);
    150 	ATF_TP_ADD_TC(tp, sigaction_noflags);
    151 	ATF_TP_ADD_TC(tp, sigaction_resethand);
    152 
    153 	return atf_no_error();
    154 }
    155