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