minix/test/ipc/shmctl/shmctl02.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
* shmctl02.c
*
* DESCRIPTION
* shmctl02 - check for EACCES, EFAULT and EINVAL errors
*
* ALGORITHM
* create a shared memory segment without read or write permissions
* create a shared memory segment with read & write permissions
* loop if that option was specified
* call shmctl() using five different invalid cases
* check the errno value
* issue a PASS message if we get EACCES, EFAULT or EINVAL
* otherwise, the tests fails
* issue a FAIL message
* call cleanup
*
* USAGE: <for command-line>
* shmctl02 [-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 "ipcshm.h"
#include <pwd.h>
char *TCID = "shmctl02";
extern int Tst_count;
char nobody_uid[] = "nobody";
struct passwd *ltpuser;
int exp_enos[] = {EPERM, EACCES, EFAULT, EINVAL, 0}; /* 0 terminated list */
/* of expected errnos */
int shm_id_1 = -1;
int shm_id_2 = -1;
int shm_id_3 = -1;
struct shmid_ds buf;
struct test_case_t {
int *shmid;
int cmd;
struct shmid_ds *sbuf;
int error;
} TC[] = {
/* EACCES - segment has no read or write permissions */
{&shm_id_1, IPC_STAT, &buf, EACCES},
/* EFAULT - IPC_SET & buf isn't valid */
{&shm_id_2, IPC_SET, (struct shmid_ds *)-1, EFAULT},
/* EFAULT - IPC_STAT & buf isn't valid */
{&shm_id_2, IPC_STAT, (struct shmid_ds *)-1, EFAULT},
/* EINVAL - the shmid is not valid */
{&shm_id_3, IPC_STAT, &buf, EINVAL},
/* EINVAL - the command is not valid */
{&shm_id_2, -1, &buf, EINVAL},
};
int TST_TOTAL = (sizeof(TC) / sizeof(*TC));
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;
/* loop through the test cases */
for (i=0; i<TST_TOTAL; i++) {
/*
* use the TEST() macro to make the call
*/
TEST(shmctl(*(TC[i].shmid), TC[i].cmd, TC[i].sbuf));
if ((TEST_RETURN != -1)&&(i < 5)) {
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 {
if (i >= 5)
tst_resm(TCONF,"shmctl() did not fail for non-root user."
"This may be okay for your distribution.");
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)
{
/* 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, "setuid failed to "
"to set the effective uid to %d",
ltpuser->pw_uid);
perror("seteuid");
}
/* get an IPC resource key */
shmkey = getipckey();
/* create a shared memory segment without read or write permissions */
if ((shm_id_1 = shmget(shmkey, SHM_SIZE, IPC_CREAT | IPC_EXCL)) == -1) {
tst_brkm(TBROK, cleanup, "couldn't create shared memory "
"segment #1 in setup()");
}
/* create a shared memory segment with read and write permissions */
if ((shm_id_2 = shmget(shmkey + 1, SHM_SIZE, IPC_CREAT | IPC_EXCL |
SHM_RW)) == -1) {
tst_brkm(TBROK, cleanup, "couldn't create shared memory "
"segment #2 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 shared memory resources */
rm_shm(shm_id_1);
rm_shm(shm_id_2);
if (seteuid(0) == -1) {
tst_resm(TINFO, "setuid failed to "
"to set the effective uid to %d",
ltpuser->pw_uid);
perror("seteuid");
}
/* 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();
}