Update.
[glibc.git] / nptl / tst-sem7.c
bloba85c73e71595e4befd3afd66d4b74b40c7a346f1
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 sem_t *s2;
40 sem_t *s3;
42 s = sem_open ("/glibc-tst-sem7", O_CREAT, 0600, 1);
43 if (s == SEM_FAILED)
45 if (errno == ENOSYS)
47 puts ("sem_open not supported. Oh well.");
48 return 0;
51 /* Maybe the shm filesystem has strict permissions. */
52 if (errno == EACCES)
54 puts ("sem_open not allowed. Oh well.");
55 return 0;
58 printf ("sem_open: %m\n");
59 return 1;
62 on_exit (remove_sem, (void *) "/glibc-tst-sem7");
64 /* We have the semaphore object. Now try again. We should get the
65 same address. */
66 s2 = sem_open ("/glibc-tst-sem7", O_CREAT, 0600, 1);
67 if (s2 == SEM_FAILED)
69 puts ("2nd sem_open failed");
70 return 1;
72 if (s != s2)
74 puts ("2nd sem_open didn't return the same address");
75 return 1;
78 /* And again, this time without O_CREAT. */
79 s3 = sem_open ("/glibc-tst-sem7", 0);
80 if (s3 == SEM_FAILED)
82 puts ("3rd sem_open failed");
83 return 1;
85 if (s != s3)
87 puts ("3rd sem_open didn't return the same address");
88 return 1;
91 /* Now close the handle. Three times. */
92 if (sem_close (s2) != 0)
94 puts ("1st sem_close failed");
95 return 1;
97 if (sem_close (s) != 0)
99 puts ("2nd sem_close failed");
100 return 1;
102 if (sem_close (s3) != 0)
104 puts ("3rd sem_close failed");
105 return 1;
108 return 0;