1/* Copyright (C) 2003-2024 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
26static void
27remove_sem (int status, void *arg)
28{
29 sem_unlink (name: arg);
30}
31
32
33static int
34do_test (void)
35{
36 sem_t *s;
37 int i;
38
39 on_exit (func: remove_sem, arg: (void *) "/glibc-tst-sem9");
40
41 for (i = 0; i < 3; ++i)
42 {
43 s = sem_open (name: "/glibc-tst-sem9", O_CREAT, 0600, 1);
44 if (s == SEM_FAILED)
45 {
46 if (errno == ENOSYS)
47 {
48 puts (s: "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 (s: "sem_open not allowed. Oh well.");
56 return 0;
57 }
58
59 printf (format: "sem_open: %m\n");
60 return 1;
61 }
62
63 /* Now close the handle. */
64 if (sem_close (sem: s) != 0)
65 {
66 puts (s: "sem_close failed");
67 return 1;
68 }
69
70 /* And remove it. */
71 if (sem_unlink (name: "/glibc-tst-sem9") != 0)
72 {
73 puts (s: "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"
83

source code of glibc/sysdeps/pthread/tst-sem9.c