1 /* 2 * Copyright (c) 2015 Dmitry V. Levin <ldv (at) altlinux.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifdef HAVE_CONFIG_H 29 # include "config.h" 30 #endif 31 32 #include <assert.h> 33 #include <signal.h> 34 #include <unistd.h> 35 #include <sys/wait.h> 36 #include <sys/resource.h> 37 38 int 39 main(void) 40 { 41 int fds[2]; 42 int s; 43 pid_t pid; 44 struct rusage rusage = {}; 45 siginfo_t info = {}; 46 47 (void) close(0); 48 (void) close(1); 49 assert(!pipe(fds) && fds[0] == 0 && fds[1] == 1); 50 51 pid = fork(); 52 assert(pid >= 0); 53 if (!pid) { 54 char c; 55 (void) close(1); 56 assert(read(0, &c, sizeof(c)) == 1); 57 return 42; 58 } 59 60 (void) close(0); 61 assert(wait4(pid, &s, WNOHANG | __WALL, NULL) == 0); 62 assert(waitid(P_PID, pid, &info, WNOHANG | WEXITED) == 0); 63 64 assert(write(1, "", 1) == 1); 65 (void) close(1); 66 assert(wait4(pid, &s, 0, &rusage) == pid); 67 assert(WIFEXITED(s) && WEXITSTATUS(s) == 42); 68 69 pid = fork(); 70 assert(pid >= 0); 71 if (!pid) { 72 (void) raise(SIGUSR1); 73 return 77; 74 } 75 assert(wait4(pid, &s, __WALL, NULL) == pid); 76 assert(WIFSIGNALED(s) && WTERMSIG(s) == SIGUSR1); 77 78 pid = fork(); 79 assert(pid >= 0); 80 if (!pid) { 81 raise(SIGSTOP); 82 return 0; 83 } 84 assert(wait4(pid, &s, WUNTRACED, NULL) == pid); 85 assert(WIFSTOPPED(s) && WSTOPSIG(s) == SIGSTOP); 86 87 assert(kill(pid, SIGCONT) == 0); 88 assert(waitid(P_PID, pid, &info, WEXITED | WSTOPPED) == 0); 89 assert(info.si_code == CLD_EXITED && info.si_status == 0); 90 91 assert(wait4(-1, &s, WNOHANG | WUNTRACED | __WALL, &rusage) == -1); 92 93 return 0; 94 } 95
