151 lines
3.0 KiB
C
151 lines
3.0 KiB
C
/* Thread with running thread calls exec.
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Copyright (C) 2002-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <paths.h>
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#include <pthread.h>
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#include <signal.h>
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#include <spawn.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <support/xsignal.h>
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static void *
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tf (void *arg)
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{
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pthread_t th = (pthread_t) arg;
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if (pthread_join (th, NULL) == 0)
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{
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puts ("thread in parent joined!?");
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exit (1);
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}
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puts ("join in thread in parent returned!?");
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exit (1);
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}
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static int
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do_test (void)
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{
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int fd[2];
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if (pipe (fd) != 0)
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{
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puts ("pipe failed");
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exit (1);
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}
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/* Not interested in knowing when the pipe is closed. */
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xsignal (SIGPIPE, SIG_IGN);
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pid_t pid = fork ();
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if (pid == -1)
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{
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puts ("fork failed");
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exit (1);
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}
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if (pid == 0)
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{
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/* Use the fd for stdout. This is kind of ugly because it
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substitutes the fd of stdout but we know what we are doing
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here... */
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if (dup2 (fd[1], STDOUT_FILENO) != STDOUT_FILENO)
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{
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puts ("dup2 failed");
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exit (1);
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}
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close (fd[0]);
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pthread_t th;
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if (pthread_create (&th, NULL, tf, (void *) pthread_self ()) != 0)
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{
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puts ("create failed");
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exit (1);
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}
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execl (_PATH_BSHELL, _PATH_BSHELL, "-c", "echo $$", NULL);
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puts ("execl failed");
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exit (1);
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}
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close (fd[1]);
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char buf[200];
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ssize_t n;
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bool seen_pid = false;
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while (TEMP_FAILURE_RETRY ((n = read (fd[0], buf, sizeof (buf)))) > 0)
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{
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/* We only expect to read the PID. */
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char *endp;
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long int rpid = strtol (buf, &endp, 10);
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if (*endp != '\n')
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{
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printf ("didn't parse whole line: \"%s\"\n", buf);
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exit (1);
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}
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if (endp == buf)
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{
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puts ("read empty line");
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exit (1);
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}
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if (rpid != pid)
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{
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printf ("found \"%s\", expected PID %ld\n", buf, (long int) pid);
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exit (1);
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}
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if (seen_pid)
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{
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puts ("found more than one PID line");
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exit (1);
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}
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seen_pid = true;
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}
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close (fd[0]);
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int status;
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int err = waitpid (pid, &status, 0);
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if (err != pid)
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{
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puts ("waitpid failed");
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exit (1);
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}
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if (!seen_pid)
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{
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puts ("didn't get PID");
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exit (1);
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}
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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