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132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/* Basic tests for SYSV shared memory functions.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <support/support.h>
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#include <support/check.h>
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#include <support/temp_file.h>
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/* These are for the temporary file we generate. */
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static char *name;
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static int shmid;
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static void
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remove_shm (void)
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{
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/* Enforce message queue removal in case of early test failure.
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Ignore error since the shm may already have being removed. */
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shmctl (shmid, IPC_RMID, 0);
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}
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static void
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do_prepare (int argc, char *argv[])
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{
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int fd = create_temp_file ("tst-sysvshm.", &name);
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if (fd == -1)
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FAIL_EXIT1 ("cannot create temporary file (errno=%d)", errno);
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}
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#define PREPARE do_prepare
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/* It is not an extensive test, but rather a functional one aimed to check
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correct parameter passing on kernel. */
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#define CHECK_EQ(v, k) \
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if ((v) != (k)) \
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FAIL_EXIT1("%d != %d", v, k)
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#define SHM_MODE 0666
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static int
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do_test (void)
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{
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atexit (remove_shm);
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key_t key = ftok (name, 'G');
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if (key == -1)
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FAIL_EXIT1 ("ftok failed");
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long int pgsz = sysconf (_SC_PAGESIZE);
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if (pgsz == -1)
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FAIL_EXIT1 ("sysconf (_SC_PAGESIZE) failed (errno = %d)", errno);
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shmid = shmget(key, pgsz, IPC_CREAT | IPC_EXCL | SHM_MODE);
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if (shmid == -1)
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{
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if (errno == ENOSYS)
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FAIL_UNSUPPORTED ("shmget not supported");
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FAIL_EXIT1 ("shmget failed (errno=%d)", errno);
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}
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/* Get shared memory kernel information and do some sanity checks. */
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struct shmid_ds shminfo;
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if (shmctl (shmid, IPC_STAT, &shminfo) == -1)
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FAIL_EXIT1 ("shmctl with IPC_STAT failed (errno=%d)", errno);
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if (shminfo.shm_perm.__key != key)
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FAIL_EXIT1 ("shmid_ds::shm_perm::key (%d) != %d",
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(int) shminfo.shm_perm.__key, (int) key);
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if (shminfo.shm_perm.mode != SHM_MODE)
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FAIL_EXIT1 ("shmid_ds::shm_perm::mode (%o) != %o",
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shminfo.shm_perm.mode, SHM_MODE);
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if (shminfo.shm_segsz != pgsz)
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FAIL_EXIT1 ("shmid_ds::shm_segsz (%lu) != %lu",
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(long unsigned) shminfo.shm_segsz, pgsz);
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/* Attach on shared memory and realize some operations. */
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int *shmem = shmat (shmid, NULL, 0);
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if (shmem == (void*) -1)
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FAIL_EXIT1 ("shmem failed (errno=%d)", errno);
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shmem[0] = 0x55555555;
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shmem[32] = 0x44444444;
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shmem[64] = 0x33333333;
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shmem[128] = 0x22222222;
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if (shmdt (shmem) == -1)
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FAIL_EXIT1 ("shmem failed (errno=%d)", errno);
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shmem = shmat (shmid, NULL, SHM_RDONLY);
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if (shmem == (void*) -1)
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FAIL_EXIT1 ("shmem failed (errno=%d)", errno);
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CHECK_EQ (shmem[0], 0x55555555);
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CHECK_EQ (shmem[32], 0x44444444);
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CHECK_EQ (shmem[64], 0x33333333);
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CHECK_EQ (shmem[128], 0x22222222);
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if (shmdt (shmem) == -1)
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FAIL_EXIT1 ("shmem failed (errno=%d)", errno);
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/* Finally free up the semnaphore resource. */
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if (shmctl (shmid, IPC_RMID, 0) == -1)
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FAIL_EXIT1 ("semctl failed (errno=%d)", errno);
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return 0;
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}
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#include <support/test-driver.c>
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