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a16d2abd49
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).
130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/* Basic tests for SYSV semaphore 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 <stdbool.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/sem.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 semid;
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static void
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remove_sem (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 sem may already have being removed. */
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semctl (semid, 0, 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-sysvsem.", &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 SEM_MODE 0644
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union semun
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{
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int val;
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struct semid_ds *buf;
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unsigned short *array;
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};
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static int
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do_test (void)
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{
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atexit (remove_sem);
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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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semid = semget(key, 1, IPC_CREAT | IPC_EXCL | SEM_MODE);
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if (semid == -1)
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{
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if (errno == ENOSYS)
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FAIL_UNSUPPORTED ("msgget not supported");
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FAIL_EXIT1 ("semget failed (errno=%d)", errno);
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}
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TEST_COMPARE (semctl (semid, 0, first_sem_invalid_cmd (), NULL), -1);
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TEST_COMPARE (errno, EINVAL);
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/* Get semaphore kernel information and do some sanity checks. */
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struct semid_ds seminfo;
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if (semctl (semid, 0, IPC_STAT, (union semun) { .buf = &seminfo }) == -1)
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FAIL_EXIT1 ("semctl with IPC_STAT failed (errno=%d)", errno);
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if (seminfo.sem_perm.__key != key)
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FAIL_EXIT1 ("semid_ds::sem_perm::key (%d) != %d",
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(int) seminfo.sem_perm.__key, (int) key);
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if (seminfo.sem_perm.mode != SEM_MODE)
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FAIL_EXIT1 ("semid_ds::sem_perm::mode (%o) != %o",
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seminfo.sem_perm.mode, SEM_MODE);
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if (seminfo.sem_nsems != 1)
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FAIL_EXIT1 ("semid_ds::sem_nsems (%lu) != 1",
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(long unsigned) seminfo.sem_nsems);
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/* Some lock/unlock basic tests. */
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struct sembuf sb1 = { 0, 1, 0 };
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if (semop (semid, &sb1, 1) == -1)
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FAIL_EXIT1 ("semop failed (errno=%i)", errno);
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struct sembuf sb2 = { 0, -1, 0 };
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if (semop (semid, &sb2, 1) == -1)
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FAIL_EXIT1 ("semop failed (errno=%i)", errno);
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#ifdef _GNU_SOURCE
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/* Set a time for half a second. The semaphore operation should timeout
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with EAGAIN. */
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struct timespec ts = { 0 /* sec */, 500000000 /* nsec */ };
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if (semtimedop (semid, &sb2, 1, &ts) != -1
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|| (errno != EAGAIN && errno != ENOSYS))
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FAIL_EXIT1 ("semtimedop succeed or returned errno != {EAGAIN,ENOSYS} "
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"(errno=%i)", errno);
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#endif
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/* Finally free up the semnaphore resource. */
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if (semctl (semid, 0, 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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