172 lines
4.1 KiB
C
172 lines
4.1 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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* shmget03.c
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*
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* DESCRIPTION
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* shmget03 - test for ENOSPC error
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*
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* ALGORITHM
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* create shared memory segments in a loop until reaching the system limit
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* loop if that option was specified
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* attempt to create yet another shared memory segment
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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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* shmget03 [-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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*
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* RESTRICTIONS
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* none
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*/
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#include "ipcshm.h"
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char *TCID = "shmget03";
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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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#define MAXIDS 8192
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int shm_id_1 = -1;
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int num_shms = 0;
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int shm_id_arr[MAXIDS];
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int main(int ac, char **av)
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{
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int lc;
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tst_parse_opts(ac, av, NULL, NULL);
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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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/*
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* use the TEST() macro to make the call
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*/
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TEST(shmget(IPC_PRIVATE, SHM_SIZE, IPC_CREAT | IPC_EXCL
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| SHM_RW));
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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, "call failed with an "
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"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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/*
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* setup() - performs all the ONE TIME setup for this test.
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*/
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void setup(void)
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{
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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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 libs/libltpipc/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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shmkey = getipckey();
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/*
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* Use a while loop to create the maximum number of memory segments.
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* If the loop exceeds MAXIDS, then break the test and cleanup.
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*/
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while ((shm_id_1 = shmget(IPC_PRIVATE, SHM_SIZE, IPC_CREAT |
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IPC_EXCL | SHM_RW)) != -1) {
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shm_id_arr[num_shms++] = shm_id_1;
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if (num_shms == MAXIDS) {
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tst_brkm(TBROK, cleanup, "The maximum number of shared "
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"memory 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_resm(TINFO, "errno = %d : %s", errno, strerror(errno));
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tst_brkm(TBROK, cleanup, "Didn't get ENOSPC in test setup");
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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 cleanup(void)
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{
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int i;
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/* remove the shared memory resources that were created */
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for (i = 0; i < num_shms; i++) {
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rm_shm(shm_id_arr[i]);
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}
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tst_rmdir();
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}
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