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a9b01014 | 1 | /* Basic tests for SYSV shared memory functions. |
04277e02 | 2 | Copyright (C) 2016-2019 Free Software Foundation, Inc. |
a9b01014 AZ |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
a9b01014 AZ |
18 | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <errno.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
24 | #include <sys/types.h> | |
25 | #include <sys/ipc.h> | |
26 | #include <sys/shm.h> | |
27 | ||
28 | #include <support/support.h> | |
29 | #include <support/check.h> | |
30 | #include <support/temp_file.h> | |
31 | ||
32 | /* These are for the temporary file we generate. */ | |
33 | static char *name; | |
34 | static int shmid; | |
35 | ||
36 | static void | |
37 | remove_shm (void) | |
38 | { | |
39 | /* Enforce message queue removal in case of early test failure. | |
40 | Ignore error since the shm may already have being removed. */ | |
41 | shmctl (shmid, IPC_RMID, 0); | |
42 | } | |
43 | ||
44 | static void | |
45 | do_prepare (int argc, char *argv[]) | |
46 | { | |
47 | int fd = create_temp_file ("tst-sysvshm.", &name); | |
48 | if (fd == -1) | |
49 | FAIL_EXIT1 ("cannot create temporary file (errno=%d)", errno); | |
50 | } | |
51 | ||
52 | #define PREPARE do_prepare | |
53 | ||
54 | /* It is not an extensive test, but rather a functional one aimed to check | |
55 | correct parameter passing on kernel. */ | |
56 | ||
57 | #define CHECK_EQ(v, k) \ | |
58 | if ((v) != (k)) \ | |
59 | FAIL_EXIT1("%d != %d", v, k) | |
60 | ||
61 | #define SHM_MODE 0666 | |
62 | ||
63 | static int | |
64 | do_test (void) | |
65 | { | |
66 | atexit (remove_shm); | |
67 | ||
68 | key_t key = ftok (name, 'G'); | |
69 | if (key == -1) | |
70 | FAIL_EXIT1 ("ftok failed"); | |
71 | ||
72 | long int pgsz = sysconf (_SC_PAGESIZE); | |
73 | if (pgsz == -1) | |
74 | FAIL_EXIT1 ("sysconf (_SC_PAGESIZE) failed (errno = %d)", errno); | |
75 | ||
76 | shmid = shmget(key, pgsz, IPC_CREAT | IPC_EXCL | SHM_MODE); | |
77 | if (shmid == -1) | |
78 | { | |
79 | if (errno == ENOSYS) | |
80 | FAIL_UNSUPPORTED ("shmget not supported"); | |
81 | FAIL_EXIT1 ("shmget failed (errno=%d)", errno); | |
82 | } | |
83 | ||
84 | /* Get shared memory kernel information and do some sanity checks. */ | |
85 | struct shmid_ds shminfo; | |
86 | if (shmctl (shmid, IPC_STAT, &shminfo) == -1) | |
87 | FAIL_EXIT1 ("shmctl with IPC_STAT failed (errno=%d)", errno); | |
88 | ||
89 | if (shminfo.shm_perm.__key != key) | |
90 | FAIL_EXIT1 ("shmid_ds::shm_perm::key (%d) != %d", | |
91 | (int) shminfo.shm_perm.__key, (int) key); | |
92 | if (shminfo.shm_perm.mode != SHM_MODE) | |
93 | FAIL_EXIT1 ("shmid_ds::shm_perm::mode (%o) != %o", | |
94 | shminfo.shm_perm.mode, SHM_MODE); | |
95 | if (shminfo.shm_segsz != pgsz) | |
96 | FAIL_EXIT1 ("shmid_ds::shm_segsz (%lu) != %lu", | |
97 | (long unsigned) shminfo.shm_segsz, pgsz); | |
98 | ||
99 | /* Attach on shared memory and realize some operations. */ | |
100 | int *shmem = shmat (shmid, NULL, 0); | |
101 | if (shmem == (void*) -1) | |
102 | FAIL_EXIT1 ("shmem failed (errno=%d)", errno); | |
103 | ||
104 | shmem[0] = 0x55555555; | |
105 | shmem[32] = 0x44444444; | |
106 | shmem[64] = 0x33333333; | |
107 | shmem[128] = 0x22222222; | |
108 | ||
109 | if (shmdt (shmem) == -1) | |
110 | FAIL_EXIT1 ("shmem failed (errno=%d)", errno); | |
111 | ||
112 | shmem = shmat (shmid, NULL, SHM_RDONLY); | |
113 | if (shmem == (void*) -1) | |
114 | FAIL_EXIT1 ("shmem failed (errno=%d)", errno); | |
115 | ||
116 | CHECK_EQ (shmem[0], 0x55555555); | |
117 | CHECK_EQ (shmem[32], 0x44444444); | |
118 | CHECK_EQ (shmem[64], 0x33333333); | |
119 | CHECK_EQ (shmem[128], 0x22222222); | |
120 | ||
121 | if (shmdt (shmem) == -1) | |
122 | FAIL_EXIT1 ("shmem failed (errno=%d)", errno); | |
123 | ||
124 | /* Finally free up the semnaphore resource. */ | |
125 | if (shmctl (shmid, IPC_RMID, 0) == -1) | |
126 | FAIL_EXIT1 ("semctl failed (errno=%d)", errno); | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | #include <support/test-driver.c> |