82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
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/* Copyright (C) 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <fcntl.h>
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#include <semaphore.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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static void
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remove_sem (int status, void *arg)
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{
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sem_unlink (arg);
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}
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int
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main (void)
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{
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sem_t *s;
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int i;
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on_exit (remove_sem, (void *) "/glibc-tst-sem9");
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for (i = 0; i < 3; ++i)
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{
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s = sem_open ("/glibc-tst-sem9", O_CREAT, 0600, 1);
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if (s == SEM_FAILED)
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{
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if (errno == ENOSYS)
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{
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puts ("sem_open not supported. Oh well.");
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return 0;
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}
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/* Maybe the shm filesystem has strict permissions. */
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if (errno == EACCES)
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{
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puts ("sem_open not allowed. Oh well.");
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return 0;
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}
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printf ("sem_open: %m\n");
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return 1;
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}
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/* Now close the handle. */
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if (sem_close (s) != 0)
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{
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puts ("sem_close failed");
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return 1;
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}
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/* And remove it. */
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if (sem_unlink ("/glibc-tst-sem9") != 0)
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{
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puts ("sem_unlink failed");
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return 1;
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}
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}
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return 0;
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}
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