minix/test/ipc/semop/semop02.c
2009-09-21 14:53:53 +00:00

223 lines
5.8 KiB
C

/*
*
* 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
* semop02.c
*
* DESCRIPTION
* semop02 - test for E2BIG, EACCES, EFAULT and EINVAL errors
*
* ALGORITHM
* create a semaphore set with read and alter permissions
* create a semaphore set without read and alter permissions
* loop if that option was specified
* call semop with five different invalid cases
* check the errno value
* issue a PASS message if we get E2BIG, EACCES, EFAULT or EINVAL
* otherwise, the tests fails
* issue a FAIL message
* call cleanup
*
* USAGE: <for command-line>
* semop02 [-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 "ipcsem.h"
char *TCID = "semop02";
int TST_TOTAL = 4;
extern int Tst_count;
int exp_enos[] = {E2BIG, EACCES, EFAULT, EINVAL, 0};
int sem_id_1 = -1; /* a semaphore set with read & alter permissions */
int sem_id_2 = -1; /* a semaphore set without read & alter permissions */
int bad_id = -1;
char nobody_uid[] = "nobody";
struct passwd *ltpuser;
struct sembuf s_buf[PSEMS];
int badbuf = -1;
#define NSOPS 5 /* a resonable number of operations */
#define BIGOPS 1024 /* a value that is too large for the number */
/* of semop operations that are permitted */
struct test_case_t {
int *semid; /* the semaphore id */
struct sembuf *t_sbuf; /* the first in an array of sembuf structures */
unsigned t_ops; /* the number of elements in the above array */
int error; /* the expected error number */
} TC[] = {
/* E2BIG - the number of operations is too big */
{&sem_id_1, (struct sembuf *)&s_buf, BIGOPS, E2BIG},
/* EACCES - the semaphore set has no access permission */
{&sem_id_2, (struct sembuf *)&s_buf, NSOPS, EACCES},
/* EINVAL - the number of elments (t_ops) is 0 */
{&sem_id_1, (struct sembuf *)&s_buf, 0, EINVAL},
/* EINVAL - the semaphore set doesn't exist */
{&bad_id, (struct sembuf *)&s_buf, NSOPS, EINVAL}
};
int main(int ac, char **av)
{
int lc; /* loop counter */
char *msg; /* message returned from parse_opts */
int i;
/* 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;
for (i=0; i<TST_TOTAL; i++) {
/*
* use the TEST macro to make the call
*/
TEST(semop(*(TC[i].semid), TC[i].t_sbuf, TC[i].t_ops));
if (TEST_RETURN != -1) {
tst_resm(TFAIL, "call succeeded unexpectedly");
continue;
}
TEST_ERROR_LOG(TEST_ERRNO);
if (TEST_ERRNO == TC[i].error) {
tst_resm(TPASS, "expected failure - errno = "
"%d : %s", TEST_ERRNO,
strerror(TEST_ERRNO));
} else {
tst_resm(TFAIL, "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)
{
/* Switch to nobody user for correct error code collection */
if (geteuid() != 0) {
tst_brkm(TBROK, tst_exit, "Test must be run as root");
}
/* 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();
ltpuser = getpwnam(nobody_uid);
if (seteuid(ltpuser->pw_uid) == -1) {
tst_resm(TINFO, "setreuid failed to "
"to set the effective uid to %d",
ltpuser->pw_uid);
perror("setreuid");
}
/* get an IPC resource key */
semkey = getipckey();
/* create a semaphore set with read and alter permissions */
if ((sem_id_1 =
semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA)) == -1) {
tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup");
}
/* increment the semkey */
semkey += 1;
/* create a semaphore set without read and alter permissions */
if ((sem_id_2 = semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL)) == -1) {
tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup");
}
}
/*
* cleanup() - performs all the ONE TIME cleanup for this test at completion
* or premature exit.
*/
void
cleanup(void)
{
/* if they exist, remove the semaphore resources */
rm_sema(sem_id_1);
rm_sema(sem_id_2);
/* 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();
}