testcases/kernel/syscalls/setdomainname/setdomainname01.c

/*
 * Copyright (c) Wipro Technologies Ltd, 2002.  All Rights Reserved.
 *
 * 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	: setdomainname01
 *
 *    EXECUTED BY	: root / superuser
 *
 *    TEST TITLE	: Basic test for setdomainame(2)
 *
 *    TEST CASE TOTAL	: 1
 *
 *    AUTHOR		: Saji Kumar.V.R <saji.kumar@wipro.com>
 *
 *    SIGNALS
 * 	Uses SIGUSR1 to pause before test if option set.
 * 	(See the parse_opts(3) man page).
 *
 *    DESCRIPTION
 *	This is a Phase I test for the setdomainname(2) system call.
 *	It is intended to provide a limited exposure of the system call.
 *
 * 	Setup:
 * 	  Setup signal handling.
 *	  Pause for SIGUSR1 if option specified.
 *	  Save the current domainname.
 *
 * 	Test:
 *	 Loop if the proper options are given.
 * 	  Execute system call
 *	  Check return code, if system call failed (return=-1)
 *		Log the errno and Issue a FAIL message.
 *	  Otherwise, Issue a PASS message.
 *
 * 	Cleanup:
 *	  Restore old domain name.
 * 	  Print errno log and/or timing stats if options given
 *
 * USAGE:  <for command-line>
 *  setdomainname01  [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p]
 *			where,  -c n : Run n copies concurrently.
 *				-e   : Turn on errno logging.
 *				-h   : Show help screen
 *				-f   : Turn off functional testing
 *				-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.
 *
 ****************************************************************/

#include <errno.h>
#include <string.h>
#include <sys/utsname.h>
#include "test.h"
#include "usctest.h"

#define MAX_NAME_LEN _UTSNAME_DOMAIN_LENGTH

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

char *TCID = "setdomainname01";	/* Test program identifier.    */
int TST_TOTAL = 1;		/* Total number of test cases. */

static char *test_domain_name = "test_dom";
static char old_domain_name[MAX_NAME_LEN];

int main(int ac, char **av)
{

	int lc;			/* loop counter */
	char *msg;		/* message returned from parse_opts */

	/* parse standard options */
	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) {
		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);

	}

	setup();

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

		Tst_count = 0;

		/*
		 * Call setdomainname(2)
		 */
		TEST(setdomainname(test_domain_name, sizeof(test_domain_name)));

		/* check return code */
		if (TEST_RETURN == -1) {
			tst_resm(TFAIL, "setdomainname() Failed, errno = %d :"
				 " %s", TEST_ERRNO, strerror(TEST_ERRNO));
		} else {
			tst_resm(TPASS, "setdomainname() returned %ld, "
				 "Domain name set to \"%s\"", TEST_RETURN,
				 test_domain_name);
		}

	}

	/* cleanup and exit */
	cleanup();
	tst_exit();

}

/* setup() - performs all ONE TIME setup for this test */
void setup()
{

	tst_sig(NOFORK, DEF_HANDLER, cleanup);

	/* Check whether we are root */
	if (geteuid() != 0) {
		tst_brkm(TBROK, NULL, "Test must be run as root");
	}

	/* Save current domain name */
	if ((getdomainname(old_domain_name, sizeof(old_domain_name))) < 0) {
		tst_brkm(TBROK, NULL, "getdomainname() failed while"
			 " getting current domain name");
	}

	TEST_PAUSE;

}

/*
 *cleanup() -  performs all ONE TIME cleanup for this test at
 *		completion or premature exit.
 */
void cleanup()
{

	/*
	 * print timing stats if that option was specified.
	 * print errno log if that option was specified.
	 */
	TEST_CLEANUP;

	/* Restore domain name */
	if ((setdomainname(old_domain_name, strlen(old_domain_name))) < 0) {
		tst_resm(TWARN, "setdomainname() failed while restoring"
			 " domainname to \"%s\"", old_domain_name);
	}

}