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9ebaabeaac
It avoids regressions on possible future commands that might require additional libc support. The downside is new commands added by newer kernels will need further glibc support. Checked on x86_64-linux-gnu and i686-linux-gnu (Linux v4.15 and v5.4).
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/* Basic tests for SYSV shared memory functions.
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Copyright (C) 2016-2020 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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<https://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 <test-sysvipc.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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TEST_COMPARE (shmctl (shmid, first_shm_invalid_cmd (), NULL), -1);
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TEST_COMPARE (errno, EINVAL);
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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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