/* Copyright (C) 2002-2018 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 <pthread.h>

#include <signal.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/mman.h>

#include <sys/wait.h>

#include <string.h>

static sigset_t ss;

static pthread_barrier_t *b;

static void *

tf (void *arg)

{

  pthread_barrier_wait (b);

  puts ("child: calling sigwait now");

  int sig;

  int err;

  err = sigwait (&ss, &sig);

  if (err != 0)

    {

      printf ("sigwait returned unsuccessfully: %s (%d)\n",

	      strerror (err), err);

      _exit (1);

    }

  puts ("sigwait returned");

  if (sig != SIGINT)

    {

      printf ("caught signal %d, expected %d (SIGINT)\n", sig, SIGINT);

      _exit (1);

    }

  puts ("child thread terminating now");

  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 didn't join");

      _exit (1);

    }

  puts ("join succeeded");

  _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 (!WIFEXITED (status))

    {

      if (WIFSIGNALED (status))

	printf ("child exited with signal %d\n", WTERMSIG (status));

      else

	puts ("child didn't exit normally");

      exit (1);

    }

  if (WEXITSTATUS (status) != 0)

    {

      printf ("exit status %d != 0\n", WEXITSTATUS (status));

      exit (1);

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"