1 | /* Basic tests for SYSV shared memory functions. |
2 | Copyright (C) 2016-2022 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 | <https://www.gnu.org/licenses/>. */ |
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 <test-sysvipc.h> |
29 | |
30 | #include <support/support.h> |
31 | #include <support/check.h> |
32 | #include <support/temp_file.h> |
33 | |
34 | /* These are for the temporary file we generate. */ |
35 | static char *name; |
36 | static int shmid; |
37 | |
38 | static void |
39 | remove_shm (void) |
40 | { |
41 | /* Enforce message queue removal in case of early test failure. |
42 | Ignore error since the shm may already have being removed. */ |
43 | shmctl (shmid: shmid, IPC_RMID, buf: 0); |
44 | } |
45 | |
46 | static void |
47 | do_prepare (int argc, char *argv[]) |
48 | { |
49 | int fd = create_temp_file (base: "tst-sysvshm." , filename: &name); |
50 | if (fd == -1) |
51 | FAIL_EXIT1 ("cannot create temporary file (errno=%d)" , errno); |
52 | } |
53 | |
54 | #define PREPARE do_prepare |
55 | |
56 | /* It is not an extensive test, but rather a functional one aimed to check |
57 | correct parameter passing on kernel. */ |
58 | |
59 | #define CHECK_EQ(v, k) \ |
60 | if ((v) != (k)) \ |
61 | FAIL_EXIT1("%d != %d", v, k) |
62 | |
63 | #define SHM_MODE 0666 |
64 | |
65 | static int |
66 | do_test (void) |
67 | { |
68 | atexit (func: remove_shm); |
69 | |
70 | key_t key = ftok (pathname: name, proj_id: 'G'); |
71 | if (key == -1) |
72 | FAIL_EXIT1 ("ftok failed" ); |
73 | |
74 | long int pgsz = sysconf (_SC_PAGESIZE); |
75 | if (pgsz == -1) |
76 | FAIL_EXIT1 ("sysconf (_SC_PAGESIZE) failed (errno = %d)" , errno); |
77 | |
78 | shmid = shmget(key: key, size: pgsz, IPC_CREAT | IPC_EXCL | SHM_MODE); |
79 | if (shmid == -1) |
80 | { |
81 | if (errno == ENOSYS) |
82 | FAIL_UNSUPPORTED ("shmget not supported" ); |
83 | FAIL_EXIT1 ("shmget failed (errno=%d)" , errno); |
84 | } |
85 | |
86 | TEST_COMPARE (shmctl (shmid, first_shm_invalid_cmd (), NULL), -1); |
87 | TEST_COMPARE (errno, EINVAL); |
88 | |
89 | /* Get shared memory kernel information and do some sanity checks. */ |
90 | struct shmid_ds shminfo; |
91 | if (shmctl (shmid: shmid, IPC_STAT, buf: &shminfo) == -1) |
92 | FAIL_EXIT1 ("shmctl with IPC_STAT failed (errno=%d)" , errno); |
93 | |
94 | if (shminfo.shm_perm.__key != key) |
95 | FAIL_EXIT1 ("shmid_ds::shm_perm::key (%d) != %d" , |
96 | (int) shminfo.shm_perm.__key, (int) key); |
97 | if (shminfo.shm_perm.mode != SHM_MODE) |
98 | FAIL_EXIT1 ("shmid_ds::shm_perm::mode (%o) != %o" , |
99 | shminfo.shm_perm.mode, SHM_MODE); |
100 | if (shminfo.shm_segsz != pgsz) |
101 | FAIL_EXIT1 ("shmid_ds::shm_segsz (%lu) != %lu" , |
102 | (long unsigned) shminfo.shm_segsz, pgsz); |
103 | |
104 | /* Attach on shared memory and realize some operations. */ |
105 | int *shmem = shmat (shmid: shmid, NULL, shmflg: 0); |
106 | if (shmem == (void*) -1) |
107 | FAIL_EXIT1 ("shmem failed (errno=%d)" , errno); |
108 | |
109 | shmem[0] = 0x55555555; |
110 | shmem[32] = 0x44444444; |
111 | shmem[64] = 0x33333333; |
112 | shmem[128] = 0x22222222; |
113 | |
114 | if (shmdt (shmaddr: shmem) == -1) |
115 | FAIL_EXIT1 ("shmem failed (errno=%d)" , errno); |
116 | |
117 | shmem = shmat (shmid: shmid, NULL, SHM_RDONLY); |
118 | if (shmem == (void*) -1) |
119 | FAIL_EXIT1 ("shmem failed (errno=%d)" , errno); |
120 | |
121 | CHECK_EQ (shmem[0], 0x55555555); |
122 | CHECK_EQ (shmem[32], 0x44444444); |
123 | CHECK_EQ (shmem[64], 0x33333333); |
124 | CHECK_EQ (shmem[128], 0x22222222); |
125 | |
126 | if (shmdt (shmaddr: shmem) == -1) |
127 | FAIL_EXIT1 ("shmem failed (errno=%d)" , errno); |
128 | |
129 | /* Finally free up the semnaphore resource. */ |
130 | if (shmctl (shmid: shmid, IPC_RMID, buf: 0) == -1) |
131 | FAIL_EXIT1 ("semctl failed (errno=%d)" , errno); |
132 | |
133 | return 0; |
134 | } |
135 | |
136 | #include <support/test-driver.c> |
137 | |