153 lines
3.6 KiB
C
153 lines
3.6 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* NAME
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* semget05.c
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*
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* DESCRIPTION
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* semget05 - test for ENOSPC error
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*
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* ALGORITHM
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* create semaphore sets in a loop until the system limit is reached
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* loop if that option was specified
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* attempt to create yet another semaphore set
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* check the errno value
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* issue a PASS message if we get ENOSPC
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* otherwise, the tests fails
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* issue a FAIL message
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* call cleanup
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*
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* USAGE: <for command-line>
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* HISTORY
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* 03/2001 - Written by Wayne Boyer
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* 07/2006 - Changes By Michael Reed
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* - Changed the value of MAXIDS for the specific machine by reading
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* the system limit for SEMMNI - The maximum number of sempahore sets
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* 03/2008 - Matthieu Fertré (mfertre@irisa.fr)
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* - Fix concurrency issue. Create private semaphores to
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* avoid conflict with concurrent processes.
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*
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* RESTRICTIONS
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* none
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*/
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#include "ipcsem.h"
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char *TCID = "semget05";
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int TST_TOTAL = 1;
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/*
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* The MAXIDS value is somewhat arbitrary and may need to be increased
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* depending on the system being tested.
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*/
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int MAXIDS = 2048;
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int *sem_id_arr = NULL;
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int num_sems = 0; /* count the semaphores created */
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int main(int ac, char **av)
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{
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int lc;
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FILE *fp;
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tst_parse_opts(ac, av, NULL, NULL);
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/* Set the MAXIDS for the specific machine by reading the system limit
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* for SEMMNI - The maximum number of sempahore sets
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*/
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fp = fopen("/proc/sys/kernel/sem", "r");
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if (fp != NULL) {
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int getmaxid;
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if (fscanf(fp, "%*d %*d %*d %d", &getmaxid) == 1)
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MAXIDS = getmaxid + 1;
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fclose(fp);
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}
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sem_id_arr = malloc(sizeof(int) * MAXIDS);
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if (sem_id_arr == NULL)
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tst_brkm(TBROK, cleanup, "malloc failed");
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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TEST(semget(IPC_PRIVATE, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA));
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if (TEST_RETURN != -1) {
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tst_resm(TFAIL, "call succeeded when error expected");
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continue;
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}
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switch (TEST_ERRNO) {
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case ENOSPC:
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tst_resm(TPASS, "expected failure - errno "
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"= %d : %s", TEST_ERRNO, strerror(TEST_ERRNO));
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break;
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default:
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tst_resm(TFAIL, "unexpected error - %d : %s",
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TEST_ERRNO, strerror(TEST_ERRNO));
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break;
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}
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}
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cleanup();
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tst_exit();
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}
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void setup(void)
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{
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int sem_q;
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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tst_tmpdir();
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while ((sem_q = semget(IPC_PRIVATE, PSEMS, IPC_CREAT | IPC_EXCL)) != -1) {
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sem_id_arr[num_sems++] = sem_q;
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if (num_sems == MAXIDS) {
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tst_brkm(TBROK, cleanup, "The maximum number of "
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"semaphore ID's has been\n\t reached. Please "
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"increase the MAXIDS value in the test.");
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}
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}
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if (errno != ENOSPC) {
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tst_brkm(TBROK, cleanup, "Didn't get ENOSPC in test setup"
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" - errno = %d : %s", errno, strerror(errno));
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}
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}
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void cleanup(void)
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{
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int i;
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for (i = 0; i < num_sems; i++) {
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rm_sema(sem_id_arr[i]);
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}
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free(sem_id_arr);
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tst_rmdir();
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}
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