| /* Basic tests for SYSV shared memory functions. |
| Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/ipc.h> |
| #include <sys/shm.h> |
| |
| #include <support/support.h> |
| #include <support/check.h> |
| #include <support/temp_file.h> |
| |
| /* These are for the temporary file we generate. */ |
| static char *name; |
| static int shmid; |
| |
| static void |
| remove_shm (void) |
| { |
| /* Enforce message queue removal in case of early test failure. |
| Ignore error since the shm may already have being removed. */ |
| shmctl (shmid, IPC_RMID, 0); |
| } |
| |
| static void |
| do_prepare (int argc, char *argv[]) |
| { |
| int fd = create_temp_file ("tst-sysvshm.", &name); |
| if (fd == -1) |
| FAIL_EXIT1 ("cannot create temporary file (errno=%d)", errno); |
| } |
| |
| #define PREPARE do_prepare |
| |
| /* It is not an extensive test, but rather a functional one aimed to check |
| correct parameter passing on kernel. */ |
| |
| #define CHECK_EQ(v, k) \ |
| if ((v) != (k)) \ |
| FAIL_EXIT1("%d != %d", v, k) |
| |
| #define SHM_MODE 0666 |
| |
| static int |
| do_test (void) |
| { |
| atexit (remove_shm); |
| |
| key_t key = ftok (name, 'G'); |
| if (key == -1) |
| FAIL_EXIT1 ("ftok failed"); |
| |
| long int pgsz = sysconf (_SC_PAGESIZE); |
| if (pgsz == -1) |
| FAIL_EXIT1 ("sysconf (_SC_PAGESIZE) failed (errno = %d)", errno); |
| |
| shmid = shmget(key, pgsz, IPC_CREAT | IPC_EXCL | SHM_MODE); |
| if (shmid == -1) |
| { |
| if (errno == ENOSYS) |
| FAIL_UNSUPPORTED ("shmget not supported"); |
| FAIL_EXIT1 ("shmget failed (errno=%d)", errno); |
| } |
| |
| /* Get shared memory kernel information and do some sanity checks. */ |
| struct shmid_ds shminfo; |
| if (shmctl (shmid, IPC_STAT, &shminfo) == -1) |
| FAIL_EXIT1 ("shmctl with IPC_STAT failed (errno=%d)", errno); |
| |
| if (shminfo.shm_perm.__key != key) |
| FAIL_EXIT1 ("shmid_ds::shm_perm::key (%d) != %d", |
| (int) shminfo.shm_perm.__key, (int) key); |
| if (shminfo.shm_perm.mode != SHM_MODE) |
| FAIL_EXIT1 ("shmid_ds::shm_perm::mode (%o) != %o", |
| shminfo.shm_perm.mode, SHM_MODE); |
| if (shminfo.shm_segsz != pgsz) |
| FAIL_EXIT1 ("shmid_ds::shm_segsz (%lu) != %lu", |
| (long unsigned) shminfo.shm_segsz, pgsz); |
| |
| /* Attach on shared memory and realize some operations. */ |
| int *shmem = shmat (shmid, NULL, 0); |
| if (shmem == (void*) -1) |
| FAIL_EXIT1 ("shmem failed (errno=%d)", errno); |
| |
| shmem[0] = 0x55555555; |
| shmem[32] = 0x44444444; |
| shmem[64] = 0x33333333; |
| shmem[128] = 0x22222222; |
| |
| if (shmdt (shmem) == -1) |
| FAIL_EXIT1 ("shmem failed (errno=%d)", errno); |
| |
| shmem = shmat (shmid, NULL, SHM_RDONLY); |
| if (shmem == (void*) -1) |
| FAIL_EXIT1 ("shmem failed (errno=%d)", errno); |
| |
| CHECK_EQ (shmem[0], 0x55555555); |
| CHECK_EQ (shmem[32], 0x44444444); |
| CHECK_EQ (shmem[64], 0x33333333); |
| CHECK_EQ (shmem[128], 0x22222222); |
| |
| if (shmdt (shmem) == -1) |
| FAIL_EXIT1 ("shmem failed (errno=%d)", errno); |
| |
| /* Finally free up the semnaphore resource. */ |
| if (shmctl (shmid, IPC_RMID, 0) == -1) |
| FAIL_EXIT1 ("semctl failed (errno=%d)", errno); |
| |
| return 0; |
| } |
| |
| #include <support/test-driver.c> |