diff options
Diffstat (limited to 'testcases/kernel/syscalls/ipc/semget/semget05.c')
| -rw-r--r-- | testcases/kernel/syscalls/ipc/semget/semget05.c | 189 |
1 files changed, 60 insertions, 129 deletions
diff --git a/testcases/kernel/syscalls/ipc/semget/semget05.c b/testcases/kernel/syscalls/ipc/semget/semget05.c index f801cb8ed..dd9a6285d 100644 --- a/testcases/kernel/syscalls/ipc/semget/semget05.c +++ b/testcases/kernel/syscalls/ipc/semget/semget05.c @@ -1,152 +1,83 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* - * - * Copyright (c) International Business Machines Corp., 2001 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * Copyright (c) International Business Machines Corp., 2001 */ -/* - * NAME - * semget05.c - * - * DESCRIPTION - * semget05 - test for ENOSPC error +/*\ + * [Description] * - * ALGORITHM - * create semaphore sets in a loop until the system limit is reached - * loop if that option was specified - * attempt to create yet another semaphore set - * check the errno value - * issue a PASS message if we get ENOSPC - * otherwise, the tests fails - * issue a FAIL message - * call cleanup + * Test for ENOSPC error. * - * USAGE: <for command-line> - * HISTORY - * 03/2001 - Written by Wayne Boyer - * 07/2006 - Changes By Michael Reed - * - Changed the value of MAXIDS for the specific machine by reading - * the system limit for SEMMNI - The maximum number of sempahore sets - * 03/2008 - Matthieu Fertré (mfertre@irisa.fr) - * - Fix concurrency issue. Create private semaphores to - * avoid conflict with concurrent processes. - * - * RESTRICTIONS - * none - */ - -#include "ipcsem.h" - -char *TCID = "semget05"; -int TST_TOTAL = 1; - -/* - * The MAXIDS value is somewhat arbitrary and may need to be increased - * depending on the system being tested. + * ENOSPC - a semaphore set exceed the maximum number of semaphore sets(SEMMNI) */ -int MAXIDS = 2048; - -int *sem_id_arr = NULL; -int num_sems = 0; /* count the semaphores created */ - -int main(int ac, char **av) +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/ipc.h> +#include "lapi/sem.h" +#include "tst_test.h" +#include "libnewipc.h" +#include "tst_safe_sysv_ipc.h" + +static int *sem_id_arr; +static int maxsems, array_cnt, used_cnt; +static key_t semkey; + +static void verify_semget(void) { - int lc; - FILE *fp; - - tst_parse_opts(ac, av, NULL, NULL); - - /* Set the MAXIDS for the specific machine by reading the system limit - * for SEMMNI - The maximum number of sempahore sets - */ - fp = fopen("/proc/sys/kernel/sem", "r"); - if (fp != NULL) { - int getmaxid; - if (fscanf(fp, "%*d %*d %*d %d", &getmaxid) == 1) - MAXIDS = getmaxid + 1; - fclose(fp); - } - - sem_id_arr = malloc(sizeof(int) * MAXIDS); - if (sem_id_arr == NULL) - tst_brkm(TBROK, cleanup, "malloc failed"); - - setup(); - - for (lc = 0; TEST_LOOPING(lc); lc++) { - tst_count = 0; - - - TEST(semget(IPC_PRIVATE, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA)); - if (TEST_RETURN != -1) { - tst_resm(TFAIL, "call succeeded when error expected"); - continue; - } - - switch (TEST_ERRNO) { - case ENOSPC: - tst_resm(TPASS, "expected failure - errno " - "= %d : %s", TEST_ERRNO, strerror(TEST_ERRNO)); - break; - default: - tst_resm(TFAIL, "unexpected error - %d : %s", - TEST_ERRNO, strerror(TEST_ERRNO)); - break; - } - } - - cleanup(); - - tst_exit(); + TST_EXP_FAIL2(semget(semkey + maxsems, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA), + ENOSPC, "semget(%i, %i, %i)", semkey + maxsems, PSEMS, + IPC_CREAT | IPC_EXCL | SEM_RA); } -void setup(void) +static void setup(void) { - int sem_q; + int res, num; - tst_sig(NOFORK, DEF_HANDLER, cleanup); + semkey = GETIPCKEY(); + used_cnt = GET_USED_ARRAYS(); + tst_res(TINFO, "Current environment %d semaphore arrays are already in use", + used_cnt); + SAFE_FILE_SCANF("/proc/sys/kernel/sem", "%*d %*d %*d %d", &maxsems); - TEST_PAUSE; + /* Prevent timeout due to high semaphore array limit */ + tst_set_max_runtime(maxsems / 200); - tst_tmpdir(); - - while ((sem_q = semget(IPC_PRIVATE, PSEMS, IPC_CREAT | IPC_EXCL)) != -1) { - sem_id_arr[num_sems++] = sem_q; - if (num_sems == MAXIDS) { - tst_brkm(TBROK, cleanup, "The maximum number of " - "semaphore ID's has been\n\t reached. Please " - "increase the MAXIDS value in the test."); - } - } + sem_id_arr = SAFE_MALLOC((maxsems - used_cnt) * sizeof(int)); + for (num = 0; num < maxsems - used_cnt; num++) { + res = semget(semkey + num, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA); + if (res == -1) + tst_brk(TBROK | TERRNO, "semget failed unexpectedly"); - if (errno != ENOSPC) { - tst_brkm(TBROK, cleanup, "Didn't get ENOSPC in test setup" - " - errno = %d : %s", errno, strerror(errno)); + sem_id_arr[array_cnt++] = res; } + tst_res(TINFO, "The maximum number of semaphore arrays (%d) has been reached", + maxsems); } -void cleanup(void) +static void cleanup(void) { - int i; + int num; - for (i = 0; i < num_sems; i++) { - rm_sema(sem_id_arr[i]); - } + if (!sem_id_arr) + return; + + for (num = 0; num < array_cnt; num++) + SAFE_SEMCTL(sem_id_arr[num], PSEMS, IPC_RMID); free(sem_id_arr); - tst_rmdir(); } + +static struct tst_test test = { + .needs_tmpdir = 1, + .setup = setup, + .cleanup = cleanup, + .test_all = verify_semget, + .save_restore = (const struct tst_path_val[]){ + {"/proc/sys/kernel/sem", NULL, + TST_SR_TCONF_MISSING | TST_SR_SKIP_RO}, + {} + } +}; |