| /* |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| /* |
| * NAME |
| * semget05.c |
| * |
| * DESCRIPTION |
| * semget05 - test for ENOSPC error |
| * |
| * 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 |
| * |
| * USAGE: <for command-line> |
| * semget05 [-c n] [-e] [-i n] [-I x] [-P x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -e : Turn on errno logging. |
| * -i n : Execute test n times. |
| * -I x : Execute test for x seconds. |
| * -P x : Pause for x seconds between iterations. |
| * -t : Turn on syscall timing. |
| * |
| * 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 "../lib/ipcsem.h" |
| |
| char *TCID = "semget05"; |
| int TST_TOTAL = 1; |
| extern int Tst_count; |
| |
| /* |
| * The MAXIDS value is somewhat arbitrary and may need to be increased |
| * depending on the system being tested. |
| */ |
| |
| int MAXIDS = 2048; |
| |
| int exp_enos[] = { ENOSPC, 0 }; /* 0 terminated list of expected errnos */ |
| int *sem_id_arr = NULL; |
| int num_sems = 0; /* count the semaphores created */ |
| |
| int main(int ac, char **av) |
| { |
| int lc; /* loop counter */ |
| char *msg; /* message returned from parse_opts */ |
| FILE *fp; |
| |
| /* parse standard options */ |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) { |
| tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg); |
| } |
| |
| /* 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(); /* global setup */ |
| |
| /* The following loop checks looping state if -i option given */ |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| /* reset Tst_count in case we are looping */ |
| Tst_count = 0; |
| |
| /* use the TEST macro to make the call */ |
| |
| TEST(semget(IPC_PRIVATE, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA)); |
| // printf("rc = %ld \n", TEST_RETURN); |
| if (TEST_RETURN != -1) { |
| tst_resm(TFAIL, "call succeeded when error expected"); |
| continue; |
| } |
| |
| TEST_ERROR_LOG(TEST_ERRNO); |
| |
| 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(); |
| |
| /*NOTREACHED*/ return (0); |
| } |
| |
| /* |
| * setup() - performs all the ONE TIME setup for this test. |
| */ |
| void setup(void) |
| { |
| int sem_q; |
| |
| /* capture signals */ |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| /* Set up the expected error numbers for -e option */ |
| TEST_EXP_ENOS(exp_enos); |
| |
| /* Pause if that option was specified */ |
| TEST_PAUSE; |
| |
| /* |
| * Create a temporary directory and cd into it. |
| * This helps to ensure that a unique msgkey is created. |
| * See ../lib/libipc.c for more information. |
| */ |
| tst_tmpdir(); |
| |
| /* |
| * Use a while loop to create the maximum number of semaphore sets. |
| * If the loop exceeds MAXIDS, then break the test and cleanup. |
| */ |
| 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."); |
| } |
| } |
| |
| /* |
| * If the errno is other than ENOSPC, then something else is wrong. |
| */ |
| |
| if (errno != ENOSPC) { |
| tst_brkm(TBROK, cleanup, "Didn't get ENOSPC in test setup" |
| " - errno = %d : %s", errno, strerror(errno)); |
| } |
| } |
| |
| /* |
| * cleanup() - performs all the ONE TIME cleanup for this test at completion |
| * or premature exit. |
| */ |
| void cleanup(void) |
| { |
| int i; |
| |
| /* remove the semaphore resources that were created */ |
| for (i = 0; i < num_sems; i++) { |
| rm_sema(sem_id_arr[i]); |
| } |
| |
| /* free malloced memory */ |
| free(sem_id_arr); |
| |
| /* Remove the temporary directory */ |
| tst_rmdir(); |
| |
| /* |
| * print timing stats if that option was specified. |
| * print errno log if that option was specified. |
| */ |
| TEST_CLEANUP; |
| |
| /* exit with return code appropriate for results */ |
| tst_exit(); |
| } |