minix/test/ipc/msgget/msgget04.c

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2009-09-21 16:53:53 +02:00
/*
*
* 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
* msgget04.c
*
* DESCRIPTION
* msgget04 - test for an EACCES error by creating a message queue
* with no read or write permission and then attempting
* to access it with various permissions.
*
* ALGORITHM
* Create a message queue with no read or write permission
* loop if that option was specified
* Try to access the message queue with various permissions
* check the errno value
* issue a PASS message if we get EACCES
* otherwise, the tests fails
* issue a FAIL message
* break any remaining tests
* call cleanup
*
* USAGE: <for command-line>
* msgget04 [-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
*
* RESTRICTIONS
* none
*/
#include <pwd.h>
#include "test.h"
#include "usctest.h"
#include "ipcmsg.h"
char *TCID = "msgget04";
int TST_TOTAL = 3;
extern int Tst_count;
char nobody_uid[] = "nobody";
struct passwd *ltpuser;
int exp_enos[] = {EACCES, 0}; /* 0 terminated list of expected errnos */
int msg_q_1 = -1; /* to hold the message queue id */
int test_flags[] = {MSG_RD, MSG_WR, MSG_RD | MSG_WR};
int main(int ac, char **av)
{
int lc; /* loop counter */
char *msg; /* message returned from parse_opts */
int i; /* a counter */
/* parse standard options */
if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)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;
/* loop through the test cases */
for (i=0; i<TST_TOTAL; i++) {
/*
* Try to access the message queue with specified
* permissions.
*/
TEST(msgget(msgkey, test_flags[i]));
if (TEST_RETURN != -1) {
tst_resm(TFAIL, "call succeeded "
"when EACCES error expected");
continue;
}
TEST_ERROR_LOG(TEST_ERRNO);
switch(TEST_ERRNO) {
case EACCES:
tst_resm(TPASS, "expected failure - errno = "
"%d : %s", TEST_ERRNO,
strerror(TEST_ERRNO));
break;
default:
tst_resm(TFAIL, "call failed with an "
"unexpected error - %d : %s",
TEST_ERRNO, strerror(TEST_ERRNO));
break;
}
}
}
cleanup();
/*NOTREACHED*/
return(0);
}
/*
* setup() - performs all the ONE TIME setup for this test.
*/
void
setup(void)
{
/* 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;
/* 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");
}
/*
* 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();
msgkey = getipckey();
/*
* Create the message queue without specifying permissions.
*/
if ((msg_q_1 = msgget(msgkey, IPC_CREAT|IPC_EXCL)) == -1) {
tst_brkm(TBROK, cleanup, "Could not create message queue"
" - errno = %d : %s", errno, strerror(errno));
}
}
/*
* cleanup() - performs all the ONE TIME cleanup for this test at completion
* or premature exit.
*/
void
cleanup(void)
{
/* if it exists, remove the message queue */
rm_queue(msg_q_1);
/* 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();
}