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 | |
26 | static void |
27 | remove_sem (int status, void *arg) |
28 | { |
29 | sem_unlink (name: arg); |
30 | } |
31 | |
32 | |
33 | static int |
34 | do_test (void) |
35 | { |
36 | sem_t *s; |
37 | sem_t *s2; |
38 | sem_t *s3; |
39 | |
40 | s = sem_open (name: "/glibc-tst-sem7" , O_CREAT, 0600, 1); |
41 | if (s == SEM_FAILED) |
42 | { |
43 | if (errno == ENOSYS) |
44 | { |
45 | puts (s: "sem_open not supported. Oh well." ); |
46 | return 0; |
47 | } |
48 | |
49 | /* Maybe the shm filesystem has strict permissions. */ |
50 | if (errno == EACCES) |
51 | { |
52 | puts (s: "sem_open not allowed. Oh well." ); |
53 | return 0; |
54 | } |
55 | |
56 | printf (format: "sem_open: %m\n" ); |
57 | return 1; |
58 | } |
59 | |
60 | on_exit (func: remove_sem, arg: (void *) "/glibc-tst-sem7" ); |
61 | |
62 | /* We have the semaphore object. Now try again. We should get the |
63 | same address. */ |
64 | s2 = sem_open (name: "/glibc-tst-sem7" , O_CREAT, 0600, 1); |
65 | if (s2 == SEM_FAILED) |
66 | { |
67 | puts (s: "2nd sem_open failed" ); |
68 | return 1; |
69 | } |
70 | if (s != s2) |
71 | { |
72 | puts (s: "2nd sem_open didn't return the same address" ); |
73 | return 1; |
74 | } |
75 | |
76 | /* And again, this time without O_CREAT. */ |
77 | s3 = sem_open (name: "/glibc-tst-sem7" , oflag: 0); |
78 | if (s3 == SEM_FAILED) |
79 | { |
80 | puts (s: "3rd sem_open failed" ); |
81 | return 1; |
82 | } |
83 | if (s != s3) |
84 | { |
85 | puts (s: "3rd sem_open didn't return the same address" ); |
86 | return 1; |
87 | } |
88 | |
89 | /* Now close the handle. Three times. */ |
90 | if (sem_close (sem: s2) != 0) |
91 | { |
92 | puts (s: "1st sem_close failed" ); |
93 | return 1; |
94 | } |
95 | if (sem_close (sem: s) != 0) |
96 | { |
97 | puts (s: "2nd sem_close failed" ); |
98 | return 1; |
99 | } |
100 | if (sem_close (sem: s3) != 0) |
101 | { |
102 | puts (s: "3rd sem_close failed" ); |
103 | return 1; |
104 | } |
105 | |
106 | return 0; |
107 | } |
108 | |
109 | #define TEST_FUNCTION do_test () |
110 | #include "../test-skeleton.c" |
111 | |