xref: /external/ltp/testcases/kernel/syscalls/setfsuid/setfsuid03.c

/*
 * Copyright (C) International Business Machines  Corp., 2001
 * Ported by Wayne Boyer
 * Adapted by Dustin Kirkland (k1rkland@us.ibm.com)
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/*
 * Testcase to test the basic functionality of the setfsuid(2) system
 * call when called by a user other than root.
 */

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <errno.h>
#include <pwd.h>

#include "test.h"
#include "usctest.h"
#include "compat_16.h"

static void setup(void);
static void cleanup(void);

TCID_DEFINE(setfsuid03);
int TST_TOTAL = 1;

static char nobody_uid[] = "nobody";
static struct passwd *ltpuser;

int main(int ac, char **av)
{
	int lc;
	char *msg;

	uid_t uid;

	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL)
		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);

	setup();

	uid = 1;
	while (!getpwuid(uid))
		uid++;

	UID16_CHECK(uid, setfsuid, cleanup);

	for (lc = 0; TEST_LOOPING(lc); lc++) {

		tst_count = 0;

		TEST(SETFSUID(cleanup, uid));

		if (TEST_RETURN == -1) {
			tst_resm(TFAIL | TTERRNO,
				"setfsuid() failed unexpectedly");
			continue;
		}

		if (!STD_FUNCTIONAL_TEST) {
			tst_resm(TPASS, "setfsuid() succeeded");
			continue;
		}

		if (TEST_RETURN == uid) {
			tst_resm(TFAIL,
				 "setfsuid() returned %ld, expected anything but %d",
				 TEST_RETURN, uid);
		} else {
			tst_resm(TPASS, "setfsuid() returned expected value : "
				 "%ld", TEST_RETURN);
		}
	}

	cleanup();
	tst_exit();
}

static void setup(void)
{
	tst_require_root(NULL);

	ltpuser = getpwnam(nobody_uid);
	if (ltpuser == NULL)
		tst_brkm(TBROK, cleanup, "getpwnam failed for user id %s",
			nobody_uid);

	if (setuid(ltpuser->pw_uid) == -1)
		tst_resm(TINFO | TERRNO, "setuid failed to "
			 "to set the effective uid to %d", ltpuser->pw_uid);

	tst_sig(NOFORK, DEF_HANDLER, cleanup);

	TEST_PAUSE;
}

static void cleanup(void)
{
	TEST_CLEANUP;
}