216 lines
5 KiB
C
216 lines
5 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., 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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* shmat03.c
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*
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* DESCRIPTION
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* shmat03 - test for EACCES error
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*
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* ALGORITHM
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* create a shared memory segment with root only read & write permissions
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* fork a child process
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* if child
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* set the ID of the child process to that of "nobody"
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* loop if that option was specified
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* call shmat() using the TEST() macro
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* check the errno value
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* issue a PASS message if we get EACCES
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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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* if parent
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* wait for child to exit
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* remove the shared memory segment
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*
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* USAGE: <for command-line>
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* shmat03 [-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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* test must be run at root
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*/
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#include "ipcshm.h"
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char *TCID = "shmat03";
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int TST_TOTAL = 1;
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extern int Tst_count;
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int exp_enos[] = {EACCES, 0}; /* 0 terminated list of expected errnos */
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int shm_id_1 = -1;
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void *addr; /* for result of shmat-call */
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uid_t ltp_uid;
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char *ltp_user = "nobody";
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int main(int ac, char **av)
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{
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char *msg; /* message returned from parse_opts */
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int pid;
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void do_child(void);
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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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setup(); /* global setup */
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if ((pid = FORK_OR_VFORK()) == -1) {
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tst_brkm(TBROK, cleanup, "could not fork");
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}
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if (pid == 0) { /* child */
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/* set the user ID of the child to the non root user */
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if (setuid(ltp_uid) == -1) {
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tst_resm(TBROK, "setuid() failed");
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exit(1);
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}
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do_child();
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} else { /* parent */
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/* wait for the child to return */
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if (waitpid(pid, NULL, 0) == -1) {
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tst_brkm(TBROK, cleanup, "waitpid failed");
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}
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/* if it exists, remove the shared memory resource */
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rm_shm(shm_id_1);
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/* Remove the temporary directory */
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tst_rmdir();
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}
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cleanup();
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return(0);
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}
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/*
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* do_child - make the TEST call as the child process
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*/
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void
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do_child(void)
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{
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int lc;
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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 TEST macro to make the call
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*/
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errno = 0;
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addr = shmat(shm_id_1, (const void *)0, 0);
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TEST_ERRNO = errno;
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if (addr != (char *)-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 EACCES:
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tst_resm(TPASS, "expected failure - errno = "
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"%d : %s", TEST_ERRNO,
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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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}
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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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/* check for root as process owner */
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check_root();
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/* capture signals */
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tst_sig(FORK, 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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shmkey = getipckey();
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/* create a shared memory segment with read and write permissions */
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if ((shm_id_1 = shmget(shmkey, SHM_SIZE,
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SHM_RW | IPC_CREAT | IPC_EXCL)) == -1) {
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tst_brkm(TBROK, cleanup, "Failed to create shared memory "
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"segment in setup");
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}
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/* get the userid for a non root user */
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ltp_uid = getuserid(ltp_user);
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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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/*
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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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