1 /* 2 * Copyright (c) 2015-2016 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 #include "tests.h" 29 #include <assert.h> 30 #include <stdio.h> 31 #include <string.h> 32 #include <unistd.h> 33 #include <sys/wait.h> 34 35 static inline int 36 logit_(const char *const str) 37 { 38 return !chdir(str); 39 } 40 41 #define prefix "fork-f." 42 #define logit(arg) logit_(prefix arg) 43 44 int main(int ac, char **av) 45 { 46 if (ac < 1) 47 return 1; 48 if (ac > 1) 49 return logit("exec"); 50 51 logit("start"); 52 53 int child_wait_fds[2]; 54 (void) close(0); 55 if (pipe(child_wait_fds)) 56 perror_msg_and_fail("pipe"); 57 58 pid_t pid = fork(); 59 60 if (pid < 0) 61 perror_msg_and_fail("fork"); 62 63 if (!pid) { 64 close(child_wait_fds[1]); 65 66 if (read(0, child_wait_fds, sizeof(int))) 67 _exit(2); 68 69 char *const args[] = { av[0], (char *) "", NULL }; 70 if (logit("child") || execve(args[0], args, args + 1)) 71 _exit(2); 72 } 73 74 close(0); 75 76 logit("parent"); 77 close(child_wait_fds[1]); 78 79 int status; 80 assert(wait(&status) == pid); 81 assert(status == 0); 82 83 pid_t ppid = getpid(); 84 logit("finish"); 85 86 printf("%-5d chdir(\"%sstart\") = -1 ENOENT (%m)\n" 87 "%-5d chdir(\"%sparent\") = -1 ENOENT (%m)\n" 88 "%-5d chdir(\"%schild\") = -1 ENOENT (%m)\n" 89 "%-5d chdir(\"%sexec\") = -1 ENOENT (%m)\n" 90 "%-5d chdir(\"%sfinish\") = -1 ENOENT (%m)\n", 91 ppid, prefix, 92 ppid, prefix, 93 pid, prefix, 94 pid, prefix, 95 ppid, prefix); 96 return 0; 97 } 98
