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glibc/nptl/tst-exec2.c
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/* Thread with running thread calls exec. | |
Copyright (C) 2002-2016 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, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <paths.h> | |
#include <pthread.h> | |
#include <signal.h> | |
#include <spawn.h> | |
#include <stdbool.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <unistd.h> | |
#include <sys/wait.h> | |
static void * | |
tf (void *arg) | |
{ | |
pthread_t th = (pthread_t) arg; | |
if (pthread_join (th, NULL) == 0) | |
{ | |
puts ("thread in parent joined!?"); | |
exit (1); | |
} | |
puts ("join in thread in parent returned!?"); | |
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, (void *) pthread_self ()) != 0) | |
{ | |
puts ("create failed"); | |
exit (1); | |
} | |
execl (_PATH_BSHELL, _PATH_BSHELL, "-c", "echo $$", NULL); | |
puts ("execl failed"); | |
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" |