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/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/wait.h>
static sigset_t ss;
static pthread_barrier_t *b;
static void *
tf (void *arg)
{
sigdelset (&ss, SIGINT);
if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
{
puts ("2nd pthread_sigmask failed");
exit (1);
}
pthread_barrier_wait (b);
int sig;
int res = sigwait (&ss, &sig);
if (res == 0)
{
printf ("sigwait returned successfully with signal %d\n", sig);
exit (1);
}
printf ("sigwait returned with %s (%d)\n", strerror (res), res);
return NULL;
}
static void
receiver (void)
{
pthread_t th;
/* Make sure the process doesn't run forever. */
alarm (10);
sigfillset (&ss);
if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
{
puts ("1st pthread_sigmask failed");
exit (1);
}
if (pthread_create (&th, NULL, tf, NULL) != 0)
{
puts ("pthread_create failed");
exit (1);
}
if (pthread_join (th, NULL) == 0)
{
puts ("thread joined?!");
exit (1);
}
_exit (0);
}
static int
do_test (void)
{
char tmp[] = "/tmp/tst-signal1-XXXXXX";
int fd = mkstemp (tmp);
if (fd == -1)
{
puts ("mkstemp failed");
exit (1);
}
unlink (tmp);
int i;
for (i = 0; i < 20; ++i)
write (fd, "foobar xyzzy", 12);
b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
MAP_SHARED, fd, 0);
if (b == MAP_FAILED)
{
puts ("mmap failed");
exit (1);
}
pthread_barrierattr_t ba;
if (pthread_barrierattr_init (&ba) != 0)
{
puts ("barrierattr_init failed");
exit (1);
}
if (pthread_barrierattr_setpshared (&ba, PTHREAD_PROCESS_SHARED) != 0)
{
puts ("barrierattr_setpshared failed");
exit (1);
}
if (pthread_barrier_init (b, &ba, 2) != 0)
{
puts ("barrier_init failed");
exit (1);
}
if (pthread_barrierattr_destroy (&ba) != 0)
{
puts ("barrierattr_destroy failed");
exit (1);
}
pid_t pid = fork ();
if (pid == -1)
{
puts ("fork failed");
exit (1);
}
if (pid == 0)
receiver ();
pthread_barrier_wait (b);
/* Wait a bit more. */
struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
nanosleep (&ts, NULL);
/* Send the signal. */
puts ("sending the signal now");
kill (pid, SIGINT);
/* Wait for the process to terminate. */
int status;
if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
{
puts ("wrong child reported terminated");
exit (1);
}
if (!WIFSIGNALED (status))
{
puts ("child wasn't signalled");
exit (1);
}
if (WTERMSIG (status) != SIGINT)
{
puts ("child not terminated with SIGINT");
exit (1);
}
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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