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1/* Copyright (C) 2003-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
4
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.
9
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.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <fcntl.h>
21#include <semaphore.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <unistd.h>
25
26
27static void
28remove_sem (int status, void *arg)
29{
30 sem_unlink (arg);
31}
32
33
34static int
35do_test (void)
36{
37 sem_t *s;
38 sem_t *s2;
39 sem_t *s3;
40
41 s = sem_open ("/glibc-tst-sem7", O_CREAT, 0600, 1);
42 if (s == SEM_FAILED)
43 {
44 if (errno == ENOSYS)
45 {
46 puts ("sem_open not supported. Oh well.");
47 return 0;
48 }
49
50 /* Maybe the shm filesystem has strict permissions. */
51 if (errno == EACCES)
52 {
53 puts ("sem_open not allowed. Oh well.");
54 return 0;
55 }
56
57 printf ("sem_open: %m\n");
58 return 1;
59 }
60
61 on_exit (remove_sem, (void *) "/glibc-tst-sem7");
62
63 /* We have the semaphore object. Now try again. We should get the
64 same address. */
65 s2 = sem_open ("/glibc-tst-sem7", O_CREAT, 0600, 1);
66 if (s2 == SEM_FAILED)
67 {
68 puts ("2nd sem_open failed");
69 return 1;
70 }
71 if (s != s2)
72 {
73 puts ("2nd sem_open didn't return the same address");
74 return 1;
75 }
76
77 /* And again, this time without O_CREAT. */
78 s3 = sem_open ("/glibc-tst-sem7", 0);
79 if (s3 == SEM_FAILED)
80 {
81 puts ("3rd sem_open failed");
82 return 1;
83 }
84 if (s != s3)
85 {
86 puts ("3rd sem_open didn't return the same address");
87 return 1;
88 }
89
90 /* Now close the handle. Three times. */
91 if (sem_close (s2) != 0)
92 {
93 puts ("1st sem_close failed");
94 return 1;
95 }
96 if (sem_close (s) != 0)
97 {
98 puts ("2nd sem_close failed");
99 return 1;
100 }
101 if (sem_close (s3) != 0)
102 {
103 puts ("3rd sem_close failed");
104 return 1;
105 }
106
107 return 0;
108}
109
110#define TEST_FUNCTION do_test ()
111#include "../test-skeleton.c"
112

Warning: That file was not part of the compilation database. It may have many parsing errors.