/* Thread calls exec. Copyright (C) 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <errno.h> #include <paths.h> #include <pthread.h> #include <signal.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/wait.h> static void * tf (void *arg) { execl (_PATH_BSHELL, _PATH_BSHELL, "-c", "echo $$", NULL); puts ("execl failed"); exit (1); } static int do_test (void) { int fd[2]; if (pipe (fd) != 0) { puts ("pipe failed"); exit (1); } /* Not interested in knowing when the pipe is closed. */ if (sigignore (SIGPIPE) != 0) { puts ("sigignore failed"); exit (1); } pid_t pid = fork (); if (pid == -1) { puts ("fork failed"); exit (1); } if (pid == 0) { /* Use the fd for stdout. This is kind of ugly because it substitutes the fd of stdout but we know what we are doing here... */ if (dup2 (fd[1], STDOUT_FILENO) != STDOUT_FILENO) { puts ("dup2 failed"); exit (1); } close (fd[0]); pthread_t th; if (pthread_create (&th, NULL, tf, NULL) != 0) { puts ("create failed"); exit (1); } if (pthread_join (th, NULL) == 0) { puts ("join succeeded!?"); exit (1); } puts ("join returned!?"); exit (1); } close (fd[1]); char buf[200]; ssize_t n; bool seen_pid = false; while (TEMP_FAILURE_RETRY ((n = read (fd[0], buf, sizeof (buf)))) > 0) { /* We only expect to read the PID. */ char *endp; long int rpid = strtol (buf, &endp, 10); if (*endp != '\n') { printf ("didn't parse whole line: \"%s\"\n", buf); exit (1); } if (endp == buf) { puts ("read empty line"); exit (1); } if (rpid != pid) { printf ("found \"%s\", expected PID %ld\n", buf, (long int) pid); exit (1); } if (seen_pid) { puts ("found more than one PID line"); exit (1); } seen_pid = true; } close (fd[0]); int status; int err = waitpid (pid, &status, 0); if (err != pid) { puts ("waitpid failed"); exit (1); } if (!seen_pid) { puts ("didn't get PID"); exit (1); } return 0; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"