1 /* 2 * Check SIGCHLD siginfo_t decoding. 3 * 4 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv (at) altlinux.org> 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 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "tests.h" 31 #include <assert.h> 32 #include <signal.h> 33 #include <string.h> 34 #include <unistd.h> 35 #include <sys/wait.h> 36 37 static siginfo_t sinfo; 38 39 static void 40 handler(int no, siginfo_t *si, void *uc) 41 { 42 memcpy(&sinfo, si, sizeof(sinfo)); 43 } 44 45 int 46 main(void) 47 { 48 tprintf("%s", ""); 49 50 int fds[2]; 51 if (pipe(fds)) 52 perror_msg_and_fail("pipe"); 53 54 pid_t pid = fork(); 55 if (pid < 0) 56 perror_msg_and_fail("fork"); 57 58 if (!pid) { 59 char c; 60 (void) close(1); 61 assert(read(0, &c, sizeof(c)) == 1); 62 return 42; 63 } 64 65 (void) close(0); 66 67 struct sigaction sa = { 68 .sa_sigaction = handler, 69 .sa_flags = SA_SIGINFO 70 }; 71 assert(sigaction(SIGCHLD, &sa, NULL) == 0); 72 73 sigset_t block_mask, unblock_mask; 74 assert(sigprocmask(SIG_SETMASK, NULL, &block_mask) == 0); 75 sigaddset(&block_mask, SIGCHLD); 76 assert(sigprocmask(SIG_SETMASK, &block_mask, NULL) == 0); 77 78 unblock_mask = block_mask; 79 sigdelset(&unblock_mask, SIGCHLD); 80 81 assert(write(1, "", 1) == 1); 82 (void) close(1); 83 84 sigsuspend(&unblock_mask); 85 tprintf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED" 86 ", si_pid=%d, si_uid=%u, si_status=%d" 87 ", si_utime=%llu, si_stime=%llu} ---\n", 88 sinfo.si_pid, sinfo.si_uid, sinfo.si_status, 89 zero_extend_signed_to_ull(sinfo.si_utime), 90 zero_extend_signed_to_ull(sinfo.si_stime)); 91 92 int s; 93 assert(wait(&s) == pid); 94 assert(WIFEXITED(s) && WEXITSTATUS(s) == 42); 95 96 if (pipe(fds)) 97 perror_msg_and_fail("pipe"); 98 pid = fork(); 99 if (pid < 0) 100 perror_msg_and_fail("fork"); 101 102 if (!pid) { 103 (void) close(1); 104 char c; 105 assert(read(0, &c, sizeof(c)) == 1); 106 (void) raise(SIGUSR1); 107 return 1; 108 } 109 110 (void) close(0); 111 112 assert(write(1, "", 1) == 1); 113 (void) close(1); 114 115 sigsuspend(&unblock_mask); 116 tprintf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED" 117 ", si_pid=%d, si_uid=%u, si_status=SIGUSR1" 118 ", si_utime=%llu, si_stime=%llu} ---\n", 119 sinfo.si_pid, sinfo.si_uid, 120 zero_extend_signed_to_ull(sinfo.si_utime), 121 zero_extend_signed_to_ull(sinfo.si_stime)); 122 123 assert(wait(&s) == pid); 124 assert(WIFSIGNALED(s) && WTERMSIG(s) == SIGUSR1); 125 126 if (pipe(fds)) 127 perror_msg_and_fail("pipe"); 128 pid = fork(); 129 if (pid < 0) 130 perror_msg_and_fail("fork"); 131 132 if (!pid) { 133 (void) close(1); 134 raise(SIGSTOP); 135 char c; 136 assert(read(0, &c, sizeof(c)) == 1); 137 return 0; 138 } 139 140 (void) close(0); 141 142 sigsuspend(&unblock_mask); 143 tprintf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_STOPPED" 144 ", si_pid=%d, si_uid=%u, si_status=SIGSTOP" 145 ", si_utime=%llu, si_stime=%llu} ---\n", 146 sinfo.si_pid, sinfo.si_uid, 147 zero_extend_signed_to_ull(sinfo.si_utime), 148 zero_extend_signed_to_ull(sinfo.si_stime)); 149 150 assert(kill(pid, SIGCONT) == 0); 151 152 sigsuspend(&unblock_mask); 153 tprintf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_CONTINUED" 154 ", si_pid=%d, si_uid=%u, si_status=SIGCONT" 155 ", si_utime=%llu, si_stime=%llu} ---\n", 156 sinfo.si_pid, sinfo.si_uid, 157 zero_extend_signed_to_ull(sinfo.si_utime), 158 zero_extend_signed_to_ull(sinfo.si_stime)); 159 160 assert(write(1, "", 1) == 1); 161 (void) close(1); 162 163 sigsuspend(&unblock_mask); 164 tprintf("--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED" 165 ", si_pid=%d, si_uid=%u, si_status=0" 166 ", si_utime=%llu, si_stime=%llu} ---\n", 167 sinfo.si_pid, sinfo.si_uid, 168 zero_extend_signed_to_ull(sinfo.si_utime), 169 zero_extend_signed_to_ull(sinfo.si_stime)); 170 171 assert(wait(&s) == pid && s == 0); 172 173 tprintf("%s\n", "+++ exited with 0 +++"); 174 return 0; 175 } 176
