| /* |
| * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org> |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "tests.h" |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <sys/wait.h> |
| |
| static inline int |
| logit(const char *const str) |
| { |
| return pwrite(-1, str, strlen(str), 0) >= 0; |
| } |
| |
| int main(int ac, char **av, char **ep) |
| { |
| if (ac < 1) |
| return 1; |
| if (ac > 1) { |
| if (read(0, &ac, sizeof(int))) |
| return 2; |
| return logit(av[1]); |
| } |
| |
| logit("start"); |
| |
| int fds[2]; |
| (void) close(0); |
| if (pipe(fds)) { |
| perror("pipe"); |
| return 77; |
| } |
| if (fcntl(fds[1], F_SETFD, FD_CLOEXEC)) { |
| perror("fcntl"); |
| return 77; |
| } |
| |
| char *const args[] = { av[0], (char *) "exec", NULL }; |
| pid_t pid = vfork(); |
| |
| if (pid < 0) { |
| perror("vfork"); |
| return 77; |
| } |
| |
| if (!pid) { |
| if (logit("child") || execve(args[0], args, args + 1)) |
| _exit(2); |
| } |
| |
| close(0); |
| |
| logit("parent"); |
| close(fds[1]); |
| |
| int status; |
| if (wait(&status) != pid) { |
| perror("wait"); |
| return 77; |
| } |
| if (status) { |
| fprintf(stderr, "status = %d\n", status); |
| return 77; |
| } |
| |
| logit("finish"); |
| |
| pid_t ppid = getpid(); |
| close(-1); |
| printf("%-5d pwrite64(-1, \"start\", 5, 0) = -1 EBADF (%m)\n" |
| "%-5d pwrite64(-1, \"child\", 5, 0) = -1 EBADF (%m)\n" |
| "%-5d pwrite64(-1, \"parent\", 6, 0) = -1 EBADF (%m)\n" |
| "%-5d pwrite64(-1, \"exec\", 4, 0) = -1 EBADF (%m)\n" |
| "%-5d pwrite64(-1, \"finish\", 6, 0) = -1 EBADF (%m)\n", |
| ppid, pid, ppid, pid, ppid); |
| return 0; |
| } |