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1 | /* Basic tests for SYSV semaphore functions. |
2 | Copyright (C) 2016 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
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 <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <errno.h> | |
22 | #include <string.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/ipc.h> | |
25 | #include <sys/sem.h> | |
26 | ||
27 | #include <support/support.h> | |
28 | #include <support/check.h> | |
29 | #include <support/temp_file.h> | |
30 | ||
31 | /* These are for the temporary file we generate. */ | |
32 | static char *name; | |
33 | static int semid; | |
34 | ||
35 | static void | |
36 | remove_sem (void) | |
37 | { | |
38 | /* Enforce message queue removal in case of early test failure. | |
39 | Ignore error since the sem may already have being removed. */ | |
40 | semctl (semid, 0, IPC_RMID, 0); | |
41 | } | |
42 | ||
43 | static void | |
44 | do_prepare (int argc, char *argv[]) | |
45 | { | |
46 | int fd = create_temp_file ("tst-sysvsem.", &name); | |
47 | if (fd == -1) | |
48 | FAIL_EXIT1 ("cannot create temporary file (errno=%d)", errno); | |
49 | } | |
50 | ||
51 | #define PREPARE do_prepare | |
52 | ||
53 | /* It is not an extensive test, but rather a functional one aimed to check | |
54 | correct parameter passing on kernel. */ | |
55 | ||
56 | #define SEM_MODE 0644 | |
57 | ||
58 | static int | |
59 | do_test (void) | |
60 | { | |
61 | atexit (remove_sem); | |
62 | ||
63 | key_t key = ftok (name, 'G'); | |
64 | if (key == -1) | |
65 | FAIL_EXIT1 ("ftok failed"); | |
66 | ||
67 | semid = semget(key, 1, IPC_CREAT | IPC_EXCL | SEM_MODE); | |
68 | if (semid == -1) | |
69 | { | |
70 | if (errno == ENOSYS) | |
71 | FAIL_UNSUPPORTED ("msgget not supported"); | |
72 | FAIL_EXIT1 ("semget failed (errno=%d)", errno); | |
73 | } | |
74 | ||
75 | /* Get semaphore kernel information and do some sanity checks. */ | |
76 | struct semid_ds seminfo; | |
77 | if (semctl (semid, 0, IPC_STAT, &seminfo) == -1) | |
78 | FAIL_EXIT1 ("semctl with IPC_STAT failed (errno=%d)", errno); | |
79 | ||
80 | if (seminfo.sem_perm.__key != key) | |
81 | FAIL_EXIT1 ("semid_ds::sem_perm::key (%d) != %d", | |
82 | (int) seminfo.sem_perm.__key, (int) key); | |
83 | if (seminfo.sem_perm.mode != SEM_MODE) | |
84 | FAIL_EXIT1 ("semid_ds::sem_perm::mode (%o) != %o", | |
85 | seminfo.sem_perm.mode, SEM_MODE); | |
86 | if (seminfo.sem_nsems != 1) | |
87 | FAIL_EXIT1 ("semid_ds::sem_nsems (%lu) != 1", | |
88 | (long unsigned) seminfo.sem_nsems); | |
89 | ||
90 | /* Some lock/unlock basic tests. */ | |
91 | struct sembuf sb1 = { 0, 1, 0 }; | |
92 | if (semop (semid, &sb1, 1) == -1) | |
93 | FAIL_EXIT1 ("semop failed (errno=%i)", errno); | |
94 | ||
95 | struct sembuf sb2 = { 0, -1, 0 }; | |
96 | if (semop (semid, &sb2, 1) == -1) | |
97 | FAIL_EXIT1 ("semop failed (errno=%i)", errno); | |
98 | ||
99 | #ifdef _GNU_SOURCE | |
100 | /* Set a time for half a second. The semaphore operation should timeout | |
101 | with EAGAIN. */ | |
102 | struct timespec ts = { 0 /* sec */, 500000000 /* nsec */ }; | |
103 | if (semtimedop (semid, &sb2, 1, &ts) != -1 | |
104 | || (errno != EAGAIN && errno != ENOSYS)) | |
105 | FAIL_EXIT1 ("semtimedop succeed or returned errno != {EAGAIN,ENOSYS} " | |
106 | "(errno=%i)", errno); | |
107 | #endif | |
108 | ||
109 | /* Finally free up the semnaphore resource. */ | |
110 | if (semctl (semid, 0, IPC_RMID, 0) == -1) | |
111 | FAIL_EXIT1 ("semctl failed (errno=%d)", errno); | |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
116 | #include <support/test-driver.c> |