/* Copyright (C) 2003-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.

   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 <fcntl.h>

#include <semaphore.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

static void

remove_sem (int status, void *arg)

{

  sem_unlink (arg);

}

static int

do_test (void)

{

  sem_t *s;

  sem_t *s2;

  sem_t *s3;

  s = sem_open ("/glibc-tst-sem7", O_CREAT, 0600, 1);

  if (s == SEM_FAILED)

    {

      if (errno == ENOSYS)

	{

	  puts ("sem_open not supported.  Oh well.");

	  return 0;

	}

      /* Maybe the shm filesystem has strict permissions.  */

      if (errno == EACCES)

	{

	  puts ("sem_open not allowed.  Oh well.");

	  return 0;

	}

      printf ("sem_open: %m\n");

      return 1;

    }

  on_exit (remove_sem, (void *) "/glibc-tst-sem7");

  /* We have the semaphore object.  Now try again.  We should get the

     same address.  */

  s2 = sem_open ("/glibc-tst-sem7", O_CREAT, 0600, 1);

  if (s2 == SEM_FAILED)

    {

      puts ("2nd sem_open failed");

      return 1;

    }

  if (s != s2)

    {

      puts ("2nd sem_open didn't return the same address");

      return 1;

    }

  /* And again, this time without O_CREAT.  */

  s3 = sem_open ("/glibc-tst-sem7", 0);

  if (s3 == SEM_FAILED)

    {

      puts ("3rd sem_open failed");

      return 1;

    }

  if (s != s3)

    {

      puts ("3rd sem_open didn't return the same address");

      return 1;

    }

  /* Now close the handle.  Three times.  */

  if (sem_close (s2) != 0)

    {

      puts ("1st sem_close failed");

      return 1;

    }

  if (sem_close (s) != 0)

    {

      puts ("2nd sem_close failed");

      return 1;

    }

  if (sem_close (s3) != 0)

    {

      puts ("3rd sem_close failed");

      return 1;

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

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