| /* |
| * |
| * 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 |
| */ |
| |
| /* |
| * NAME |
| * shmget02.c |
| * |
| * DESCRIPTION |
| * shmget02 - check for ENOENT, EEXIST and EINVAL errors |
| * |
| * ALGORITHM |
| * create a shared memory segment with read & write permissions |
| * loop if that option was specified |
| * call shmget() using five different invalid cases |
| * check the errno value |
| * issue a PASS message if we get ENOENT, EEXIST or EINVAL |
| * otherwise, the tests fails |
| * issue a FAIL message |
| * call cleanup |
| * |
| * USAGE: <for command-line> |
| * shmget02 [-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 |
| * |
| * 06/03/2008 Renaud Lottiaux (Renaud.Lottiaux@kerlabs.com) |
| * - Fix concurrency issue. The second key used for this test could |
| * conflict with the key from another task. |
| * |
| * RESTRICTIONS |
| * none |
| */ |
| |
| #include "ipcshm.h" |
| |
| char *TCID = "shmget02"; |
| int TST_TOTAL = 4; |
| |
| int shm_id_1 = -1; |
| int shm_nonexisting_key = -1; |
| key_t shmkey2; |
| |
| struct test_case_t { |
| int *skey; |
| int size; |
| int flags; |
| int error; |
| } TC[] = { |
| /* EINVAL - size is 0 */ |
| { |
| &shmkey2, 0, IPC_CREAT | IPC_EXCL | SHM_RW, EINVAL}, |
| /* EINVAL - size is negative */ |
| // {&shmkey2, -1, IPC_CREAT | IPC_EXCL | SHM_RW, EINVAL}, |
| /* EINVAL - size is larger than created segment */ |
| { |
| &shmkey, SHM_SIZE * 2, SHM_RW, EINVAL}, |
| /* EEXIST - the segment exists and IPC_CREAT | IPC_EXCL is given */ |
| { |
| &shmkey, SHM_SIZE, IPC_CREAT | IPC_EXCL | SHM_RW, EEXIST}, |
| /* ENOENT - no segment exists for the key and IPC_CREAT is not given */ |
| /* use shm_id_2 (-1) as the key */ |
| { |
| &shm_nonexisting_key, SHM_SIZE, SHM_RW, ENOENT} |
| }; |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| int i; |
| |
| tst_parse_opts(ac, av, NULL, NULL); |
| |
| 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; |
| |
| /* loop through the test cases */ |
| for (i = 0; i < TST_TOTAL; i++) { |
| /* |
| * Look for a failure ... |
| */ |
| |
| TEST(shmget(*(TC[i].skey), TC[i].size, TC[i].flags)); |
| |
| if (TEST_RETURN != -1) { |
| tst_resm(TFAIL, "call succeeded unexpectedly"); |
| continue; |
| } |
| |
| if (TEST_ERRNO == TC[i].error) { |
| tst_resm(TPASS, "expected failure - errno = " |
| "%d : %s", TEST_ERRNO, |
| strerror(TEST_ERRNO)); |
| } else { |
| tst_resm(TFAIL, "call failed with an " |
| "unexpected error - %d : %s", |
| TEST_ERRNO, strerror(TEST_ERRNO)); |
| } |
| } |
| } |
| |
| cleanup(); |
| |
| tst_exit(); |
| } |
| |
| /* |
| * setup() - performs all the ONE TIME setup for this test. |
| */ |
| void setup(void) |
| { |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| 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(); |
| |
| /* get an IPC resource key */ |
| shmkey = getipckey(); |
| |
| /* Get an new IPC resource key. */ |
| shmkey2 = getipckey(); |
| |
| if ((shm_id_1 = shmget(shmkey, SHM_SIZE, IPC_CREAT | IPC_EXCL | |
| SHM_RW)) == -1) { |
| tst_brkm(TBROK, cleanup, "couldn't create shared memory " |
| "segment in setup()"); |
| } |
| |
| /* Make sure shm_nonexisting_key is a nonexisting key */ |
| while (1) { |
| while (-1 != shmget(shm_nonexisting_key, 1, SHM_RD)) { |
| shm_nonexisting_key--; |
| } |
| if (errno == ENOENT) |
| break; |
| } |
| } |
| |
| /* |
| * cleanup() - performs all the ONE TIME cleanup for this test at completion |
| * or premature exit. |
| */ |
| void cleanup(void) |
| { |
| /* if it exists, remove the shared memory resource */ |
| rm_shm(shm_id_1); |
| |
| tst_rmdir(); |
| |
| } |