219 lines
5.4 KiB
C
219 lines
5.4 KiB
C
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/*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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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* semget05 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -e : Turn on errno logging.
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* -i n : Execute test n times.
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* -I x : Execute test for x seconds.
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* -P x : Pause for x seconds between iterations.
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* -t : Turn on syscall timing.
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*
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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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*
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* RESTRICTIONS
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* none
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*/
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#include "../lib/ipcsem.h"
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char *TCID = "semget05";
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int TST_TOTAL = 1;
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extern int Tst_count;
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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 exp_enos[] = {ENOSPC, 0}; /* 0 terminated list of expected errnos */
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int *sem_id_arr;
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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,getmaxid=0; /* loop counter */
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char *msg; /* message returned from parse_opts */
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FILE *fp;
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/* parse standard options */
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if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
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tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
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}
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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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if((fp = fopen("/proc/sys/kernel/sem", "r")) != NULL)
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{
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for(lc= 0; lc < 4; lc++)
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{
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if(lc == 3)
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{
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if(getmaxid > MAXIDS)
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MAXIDS=getmaxid;
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}
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}
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}
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if(fp)
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fclose(fp);
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sem_id_arr = (int*)malloc(sizeof(int)*MAXIDS);
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setup(); /* global setup */
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/* The following loop checks looping state if -i option given */
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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/* reset Tst_count in case we are looping */
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Tst_count = 0;
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/* use the TEST macro to make the call */
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TEST(semget(semkey + num_sems, PSEMS,
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IPC_CREAT | IPC_EXCL | SEM_RA));
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/* printf("rc = %ld \n", TEST_RETURN); */
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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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TEST_ERROR_LOG(TEST_ERRNO);
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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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/*NOTREACHED*/
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return(0);
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}
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/*
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* setup() - performs all the ONE TIME setup for this test.
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*/
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void
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setup(void)
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{
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int sem_q;
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/* capture signals */
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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/* Set up the expected error numbers for -e option */
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TEST_EXP_ENOS(exp_enos);
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/* Pause if that option was specified */
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TEST_PAUSE;
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/*
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* Create a temporary directory and cd into it.
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* This helps to ensure that a unique msgkey is created.
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* See ../lib/libipc.c for more information.
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*/
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tst_tmpdir();
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/* get an IPC resource key */
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semkey = getipckey();
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/*
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* Use a while loop to create the maximum number of semaphore sets.
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* If the loop exceeds MAXIDS, then break the test and cleanup.
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*/
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while((sem_q =
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semget(semkey + num_sems, 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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/*
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* If the errno is other than ENOSPC, then something else is wrong.
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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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/*
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* cleanup() - performs all the ONE TIME cleanup for this test at completion
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* or premature exit.
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*/
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void
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cleanup(void)
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{
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int i;
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/* remove the semaphore resources that were created */
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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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/* Remove the temporary directory */
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tst_rmdir();
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/*
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* print timing stats if that option was specified.
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* print errno log if that option was specified.
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*/
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TEST_CLEANUP;
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/* exit with return code appropriate for results */
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tst_exit();
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}
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