| /* |
| * |
| * 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 |
| * shmat02.c |
| * |
| * DESCRIPTION |
| * shmat02 - check for EINVAL and EACCES errors |
| * |
| * ALGORITHM |
| * loop if that option was specified |
| * call shmat() using three invalid test cases |
| * check the errno value |
| * issue a PASS message if we get EINVAL or EACCES |
| * otherwise, the tests fails |
| * issue a FAIL message |
| * call cleanup |
| * |
| * USAGE: <for command-line> |
| * shmat02 [-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 |
| * |
| * 27/02/2008 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 |
| * Must be ran as non-root |
| */ |
| |
| #include "ipcshm.h" |
| #include <pwd.h> |
| |
| char *TCID = "shmat02"; |
| extern int Tst_count; |
| char nobody_uid[] = "nobody"; |
| struct passwd *ltpuser; |
| |
| int exp_enos[] = { EINVAL, EACCES, 0 }; /* 0 terminated list of */ |
| |
| /* expected errnos */ |
| |
| int shm_id_1 = -1; |
| int shm_id_2 = -1; |
| int shm_id_3 = -1; |
| |
| void *base_addr; /* By probing this address first, we can make |
| * non-aligned addresses from it for different |
| * architectures without explicitly code it. |
| */ |
| |
| void *addr; /* for result of shmat-call */ |
| |
| struct test_case_t { |
| int *shmid; |
| int offset; |
| int error; |
| }; |
| |
| int TST_TOTAL = 3; |
| |
| static void setup_tc(int i, struct test_case_t *tc) |
| { |
| |
| struct test_case_t TC[] = { |
| /* EINVAL - the shared memory ID is not valid */ |
| {&shm_id_1, 0, EINVAL}, |
| /* EINVAL - the address is not page aligned and SHM_RND is not given */ |
| {&shm_id_2, SHMLBA - 1, EINVAL}, |
| /* EACCES - the shared memory resource has no read/write permission */ |
| {&shm_id_3, 0, EACCES} |
| }; |
| |
| if (i > TST_TOTAL || i < 0) |
| return; |
| |
| *tc = TC[i]; |
| } |
| |
| int main(int ac, char **av) |
| { |
| int lc; /* loop counter */ |
| char *msg; /* message returned from parse_opts */ |
| int i; |
| struct test_case_t tc; |
| |
| /* parse standard options */ |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) { |
| tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg); |
| } |
| |
| 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; |
| |
| /* setup test case paremeters */ |
| setup_tc(lc, &tc); |
| |
| /* loop through the test cases */ |
| for (i = 0; i < TST_TOTAL; i++) { |
| /* |
| * make the call using the TEST() macro - attempt |
| * various invalid shared memory attaches |
| */ |
| errno = 0; |
| addr = shmat(*(tc.shmid), base_addr + tc.offset, 0); |
| TEST_ERRNO = errno; |
| |
| if (addr != (void *)-1) { |
| tst_resm(TFAIL, "call succeeded unexpectedly"); |
| continue; |
| } |
| |
| TEST_ERROR_LOG(TEST_ERRNO); |
| |
| if (TEST_ERRNO == tc.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(); |
| |
| /*NOTREACHED*/ return 0; |
| } |
| |
| /* |
| * setup() - performs all the ONE TIME setup for this test. |
| */ |
| void setup(void) |
| { |
| key_t shmkey2; |
| |
| /* Switch to nobody user for correct error code collection */ |
| if (geteuid() != 0) { |
| tst_brkm(TBROK, tst_exit, "Test must be run as root"); |
| } |
| ltpuser = getpwnam(nobody_uid); |
| if (setuid(ltpuser->pw_uid) == -1) { |
| tst_resm(TINFO, "setuid failed to " |
| "to set the effective uid to %d", ltpuser->pw_uid); |
| perror("setuid"); |
| } |
| |
| /* 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(); |
| |
| /* get an IPC resource key */ |
| shmkey = getipckey(); |
| |
| /* create a shared memory resource with read and write permissions */ |
| /* also post increment the shmkey for the next shmget call */ |
| if ((shm_id_2 = shmget(shmkey, INT_SIZE, SHM_RW | IPC_CREAT | |
| IPC_EXCL)) == -1) { |
| tst_brkm(TBROK, cleanup, "Failed to create shared memory " |
| "resource #1 in setup()"); |
| } |
| |
| /* Get an new IPC resource key. */ |
| shmkey2 = getipckey(); |
| |
| /* create a shared memory resource without read and write permissions */ |
| if ((shm_id_3 = shmget(shmkey2, INT_SIZE, IPC_CREAT | IPC_EXCL)) == -1) { |
| tst_brkm(TBROK, cleanup, "Failed to create shared memory " |
| "resource #2 in setup()"); |
| } |
| |
| /* Probe an available linear address for attachment */ |
| if ((base_addr = shmat(shm_id_2, NULL, 0)) == (void *)-1) { |
| tst_brkm(TBROK, cleanup, "Couldn't attach shared memory"); |
| } |
| |
| if (shmdt((const void *)base_addr) == -1) { |
| tst_brkm(TBROK, cleanup, "Couldn't detach shared memory"); |
| } |
| |
| /* some architectures (e.g. parisc) are strange, so better always align to |
| * next SHMLBA address. */ |
| base_addr = |
| (void *)(((unsigned long)(base_addr) & ~(SHMLBA - 1)) + SHMLBA); |
| } |
| |
| /* |
| * cleanup() - performs all the ONE TIME cleanup for this test at completion |
| * or premature exit. |
| */ |
| void cleanup(void) |
| { |
| /* if they exist, remove the shared memory resources */ |
| rm_shm(shm_id_2); |
| rm_shm(shm_id_3); |
| |
| /* 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(); |
| } |