/*
* Copyright (C) Bull S.A. 2005. $
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
/**************************************************************************
*
* TEST IDENTIFIER : mlockall03
*
* EXECUTED BY : root / superuser
*
* TEST TITLE : Test for checking basic error conditions for
* mlockall(2)
*
* TEST CASE TOTAL : 3
*
* AUTHOR : Jacky Malcles
*
* SIGNALS
* Uses SIGUSR1 to pause before test if option set.
* (See the parse_opts(3) man page).
*
* DESCRIPTION
*$
* Verify that mlockall(2) returns -1 and sets errno to
*
* 1) ENOMEM - If the caller had a non-zero RLIMIT_MEMLOCK
* and tried to lock more memory than the limit permitted.
* 2) EPERM - If the caller was not privileged
* and its RLIMIT_MEMLOCK soft resource limit was 0.
* 3) EINVAL - Unknown flags were specified.
*
* Setup:
* Setup signal handling.
* Pause for SIGUSR1 if option specified.
*
* Test:
* Loop if the proper options are given.
* Do necessary setup for each test.
* Execute system call
* Check return code, if system call failed and errno == expected errno
* Issue sys call passed with expected return value and errno.
* Otherwise,
* Issue sys call failed to produce expected error.
* Do cleanup for each test.
*
* Cleanup:
* Print errno log and/or timing stats if options given
*
* USAGE: <for command-line>
* mlockall03 [-c n] [-e] [-i n] [-I x] [-p x] [-t]
* where,
* -c n : Run n copies concurrently
* -e : Turn on errno logging.
* -h : Show this help screen
* -i n : Execute test n times.
* -I x : Execute test for x seconds.
* -p : Pause for SIGUSR1 before starting
* -P x : Pause for x seconds between iterations.
* -t : Turn on syscall timing.
*
* RESTRICTIONS
* Test must run as root.
*****************************************************************************/
#include <errno.h>
#include <unistd.h>
#include <pwd.h>
#include <ctype.h>
#include <sys/mman.h>
#include "test.h"
#include "safe_macros.h"
#include <sys/resource.h>
#include <sys/utsname.h>
void setup();
int setup_test(int);
int compare(char s1[], char s2[]);
void cleanup_test(int);
void cleanup();
char *TCID = "mlockall03";
int TST_TOTAL = 3;
#if !defined(UCLINUX)
char *ref_release = "2.6.8\0";
struct test_case_t {
int flag; /* flag value */
int error; /* error description */
char *edesc; /* Expected error no */
} TC[] = {
{
MCL_CURRENT, ENOMEM,
"tried to lock more memory than the limit permitted"}, {
MCL_CURRENT, EPERM, "Not a superuser and RLIMIT_MEMLOCK was 0"}, {
~(MCL_CURRENT | MCL_FUTURE), EINVAL, "Unknown flag"}
};
int main(int ac, char **av)
{
int lc, i;
struct utsname *buf;
tst_parse_opts(ac, av, NULL, NULL);
/* allocate some space for buf */
if ((buf = malloc((size_t)sizeof(struct utsname))) == NULL) {
tst_brkm(TFAIL, NULL, "malloc failed for buf");
}
if (uname(buf) < 0) {
tst_resm(TFAIL, "uname failed getting release number");
}
if ((compare(ref_release, buf->release)) <= 0) {
tst_brkm(TCONF,
NULL,
"In Linux 2.6.8 and earlier this test will not run.");
}
setup();
/* check looping state */
for (lc = 0; TEST_LOOPING(lc); lc++) {
tst_count = 0;
for (i = 0; i < TST_TOTAL; i++) {
if (setup_test(i)) {
tst_resm(TFAIL, "mlockall() Failed while setup "
"for checking error %s", TC[i].edesc);
continue;
}
TEST(mlockall(TC[i].flag));
/* check return code */
if (TEST_RETURN == -1) {
if (TEST_ERRNO != TC[i].error)
tst_brkm(TFAIL, cleanup,
"mlockall() Failed with wrong "
"errno, expected errno=%s, "
"got errno=%d : %s",
TC[i].edesc, TEST_ERRNO,
strerror(TEST_ERRNO));
else
tst_resm(TPASS,
"expected failure - errno "
"= %d : %s",
TEST_ERRNO,
strerror(TEST_ERRNO));
} else {
tst_brkm(TFAIL, cleanup,
"mlockall() Failed, expected "
"return value=-1, got %ld",
TEST_RETURN);
}
cleanup_test(i);
}
}
/* cleanup and exit */
cleanup();
tst_exit();
}
/*
* setup() - performs all ONE TIME setup for this test.
*/
void setup(void)
{
tst_require_root();
tst_sig(FORK, DEF_HANDLER, cleanup);
TEST_PAUSE;
return;
}
int compare(char s1[], char s2[])
{
int i = 0;
while (s1[i] == s2[i] && s1[i])
i++;
if (i < 4)
return s2[i] - s1[i];
if ((i == 4) && (isalnum(s2[i + 1]))) {
return 1;
} else {
/* it is not an alphanumeric character */
return s2[i] - s1[i];
}
return 0;
}
int setup_test(int i)
{
struct rlimit rl;
char nobody_uid[] = "nobody";
struct passwd *ltpuser;
switch (i) {
case 0:
ltpuser = getpwnam(nobody_uid);
if (seteuid(ltpuser->pw_uid) == -1) {
tst_brkm(TBROK, cleanup, "seteuid() failed to "
"change euid to %d errno = %d : %s",
ltpuser->pw_uid, TEST_ERRNO,
strerror(TEST_ERRNO));
return 1;
}
rl.rlim_max = 10;
rl.rlim_cur = 7;
if (setrlimit(RLIMIT_MEMLOCK, &rl) != 0) {
tst_resm(TWARN, "setrlimit failed to set the "
"resource for RLIMIT_MEMLOCK to check "
"for mlockall() error %s\n", TC[i].edesc);
return 1;
}
return 0;
case 1:
rl.rlim_max = 0;
rl.rlim_cur = 0;
if (setrlimit(RLIMIT_MEMLOCK, &rl) != 0) {
tst_resm(TWARN, "setrlimit failed to set the "
"resource for RLIMIT_MEMLOCK to check "
"for mlockall() error %s\n", TC[i].edesc);
return 1;
}
ltpuser = getpwnam(nobody_uid);
if (seteuid(ltpuser->pw_uid) == -1) {
tst_brkm(TBROK, cleanup, "seteuid() failed to "
"change euid to %d errno = %d : %s",
ltpuser->pw_uid, TEST_ERRNO,
strerror(TEST_ERRNO));
return 1;
}
return 0;
}
return 0;
}
void cleanup_test(int i)
{
struct rlimit rl;
switch (i) {
case 0:
SAFE_SETEUID(cleanup, 0);
rl.rlim_max = -1;
rl.rlim_cur = -1;
if (setrlimit(RLIMIT_MEMLOCK, &rl) != 0) {
tst_brkm(TFAIL, cleanup,
"setrlimit failed to reset the "
"resource for RLIMIT_MEMLOCK while "
"checking for mlockall() error %s\n",
TC[i].edesc);
}
return;
case 1:
SAFE_SETEUID(cleanup, 0);
return;
}
}
#else
int main(void)
{
tst_resm(TINFO, "test is not available on uClinux");
tst_exit();
}
#endif /* if !defined(UCLINUX) */
/*
* cleanup() - performs all ONE TIME cleanup for this test at
* completion or premature exit.
*/
void cleanup(void)
{
return;
}