1  /* Copyright (C) 2003-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <fcntl.h>
      20  #include <semaphore.h>
      21  #include <stdio.h>
      22  #include <stdlib.h>
      23  #include <unistd.h>
      24  
      25  
      26  static void
      27  remove_sem (int status, void *arg)
      28  {
      29    sem_unlink (arg);
      30  }
      31  
      32  
      33  static int
      34  do_test (void)
      35  {
      36    sem_t *s;
      37    int i;
      38  
      39    on_exit (remove_sem, (void *) "/glibc-tst-sem9");
      40  
      41    for (i = 0; i < 3; ++i)
      42      {
      43        s = sem_open ("/glibc-tst-sem9", O_CREAT, 0600, 1);
      44        if (s == SEM_FAILED)
      45  	{
      46  	  if (errno == ENOSYS)
      47  	    {
      48  	      puts ("sem_open not supported.  Oh well.");
      49  	      return 0;
      50  	    }
      51  
      52  	  /* Maybe the shm filesystem has strict permissions.  */
      53  	  if (errno == EACCES)
      54  	    {
      55  	      puts ("sem_open not allowed.  Oh well.");
      56  	      return 0;
      57  	    }
      58  
      59  	  printf ("sem_open: %m\n");
      60  	  return 1;
      61  	}
      62  
      63        /* Now close the handle.  */
      64        if (sem_close (s) != 0)
      65  	{
      66  	  puts ("sem_close failed");
      67  	  return 1;
      68  	}
      69  
      70        /* And remove it.  */
      71        if (sem_unlink ("/glibc-tst-sem9") != 0)
      72  	{
      73  	  puts ("sem_unlink failed");
      74  	  return 1;
      75  	}
      76      }
      77  
      78    return 0;
      79  }
      80  
      81  #define TEST_FUNCTION do_test ()
      82  #include "../test-skeleton.c"