Set errno for ±Inf.
[glibc/history.git] / nptl / tst-sem9.c
blobcdd8eaa30f2efad25d105d105448f4f364a9f10d
1 /* Copyright (C) 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <errno.h>
21 #include <fcntl.h>
22 #include <semaphore.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <unistd.h>
28 static void
29 remove_sem (int status, void *arg)
31 sem_unlink (arg);
35 int
36 main (void)
38 sem_t *s;
39 int i;
41 on_exit (remove_sem, (void *) "/glibc-tst-sem9");
43 for (i = 0; i < 3; ++i)
45 s = sem_open ("/glibc-tst-sem9", O_CREAT, 0600, 1);
46 if (s == SEM_FAILED)
48 if (errno == ENOSYS)
50 puts ("sem_open not supported. Oh well.");
51 return 0;
54 /* Maybe the shm filesystem has strict permissions. */
55 if (errno == EACCES)
57 puts ("sem_open not allowed. Oh well.");
58 return 0;
61 printf ("sem_open: %m\n");
62 return 1;
65 /* Now close the handle. */
66 if (sem_close (s) != 0)
68 puts ("sem_close failed");
69 return 1;
72 /* And remove it. */
73 if (sem_unlink ("/glibc-tst-sem9") != 0)
75 puts ("sem_unlink failed");
76 return 1;
80 return 0;