testcases/kernel/syscalls/lchown/lchown01.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
 */

/*
 * Test Name: lchown01
 *
 * Test Description:
 *  Verify that, lchown(2) succeeds to change the owner and group of a file
 *  specified by path to any numeric owner(uid)/group(gid) values when invoked 
 *  by super-user.
 *
 * Expected Result:
 *  lchown(2) should return 0 and the ownership set on the file should match 
 *  the numeric values contained in owner and group respectively.
 *	
 * Algorithm:
 *  Setup:
 *   Setup signal handling.
 *   Create temporary directory.
 *   Pause for SIGUSR1 if option specified.
 *
 *  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,
 *   	Verify the Functionality of system call	
 *      if successful,
 *      	Issue Functionality-Pass message.
 *      Otherwise,
 *		Issue Functionality-Fail message.
 *  Cleanup:
 *   Print errno log and/or timing stats if options given
 *   Delete the temporary directory created.
 *
 * Usage:  <for command-line>
 *  lchown01 [-c n] [-e] [-f] [-i n] [-I x] [-P x] [-t]
 *     where,  -c n : Run n copies concurrently.
 *             -e   : Turn on errno logging.
 *             -f   : Turn off functionality Testing.
 *	       -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
 *	07/2001 Ported by Wayne Boyer
 *
 * RESTRICTIONS:
 *  This test should be run by 'super-user' (root) only.
 *
 */

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/fcntl.h>
#include <errno.h>
#include <string.h>
#include <signal.h>

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

#define FILE_MODE	S_IFREG | S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
#define TESTFILE	"testfile"
#define SFILE		"slink_file"

char *TCID="lchown01";		/* Test program identifier.    */
int TST_TOTAL=5;		/* Total number of test conditions */
extern int Tst_count;		/* Test Case counter for tst_* routines */

struct test_case_t {	/* test case struct. to test different conditions */
	char *desc;
	uid_t user_id;
	gid_t group_id;
} Test_cases[] = {
	{ "Change Owner/Group ids", 700, 701 },
	{ "Change Owner id only", 702, -1 },
	{ "Change Owner id only", 703, 701 },
	{ "Change Group id only", -1, 704 },
	{ "Change Group id only", 703, 705 },
	{ NULL, 0, 0 }
};

void setup();			/* setup function for the test */
void cleanup();			/* cleanup function for the test */

int
main(int ac, char **av)
{
	struct stat stat_buf;	/* stat(2) struct contents */
	int lc;			/* loop counter */
	char *msg;		/* message returned from parse_opts */
	int ind;		/* counter variable for chmod(2) tests */
	uid_t User_id;		/* user id of the user set for testfile */
	gid_t Group_id;		/* group id of the user set for testfile */
	char *test_desc;	/* test specific message */
    
	/* Parse standard options given to run the test. */
	msg = parse_opts(ac, av, (option_t *) NULL, NULL);
	if (msg != (char *) NULL) {
		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
		tst_exit();
	}

	/* Perform global setup for test */
	setup();

	/* Check 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 (ind = 0; Test_cases[ind].desc != NULL; ind++) {
			test_desc = Test_cases[ind].desc;
			User_id = Test_cases[ind].user_id;
			Group_id = Test_cases[ind].group_id;

			/* 
			 * Call lchwon(2) with different user id and
			 * group id (numeric values) to set it on
			 * symlink of testfile.
		 	 */
			TEST(lchown(SFILE, User_id, Group_id));

			/* check return code of lchown(2) */
			if (TEST_RETURN == -1) {
				tst_resm(TFAIL,
					 "lchown() Fails to %s, errno=%d",
					 test_desc, TEST_ERRNO);
				continue;
			}
			/*
			 * Perform functional verification if test
			 * executed without (-f) option.
			 */
			if (STD_FUNCTIONAL_TEST) {
				/*
			 	 * Get the testfile information using
				 * lstat(2).
				 */
				if (lstat(SFILE, &stat_buf) < 0) {
					tst_brkm(TFAIL, cleanup, "lstat(2) of "
						 "%s failed, errno:%d",
						 SFILE, TEST_ERRNO);
				}
				if (User_id == -1) {
					User_id = Test_cases[ind - 1].user_id;
				}
				if (Group_id == -1) {
					Group_id = Test_cases[ind - 1].group_id;
				}

				/*
				 * Check for expected Ownership ids
				 * set on testfile.
				 */
				if ((stat_buf.st_uid != User_id) ||
				    (stat_buf.st_gid != Group_id)) {
					tst_resm(TFAIL,
						 "%s: Incorrect ownership set, "
						 "Expected %d %d", SFILE,
						 User_id, Group_id);
				} else {
					tst_resm(TPASS, "lchown() succeeds to "
						 "%s of %s", test_desc, SFILE);
				}
			} else {
				tst_resm(TPASS, "call succeeded");
			}
		}
	}	/* End for TEST_LOOPING */

	/* Call cleanup() to undo setup done for the test. */
	cleanup();

	/*NOTREACHED*/
	return 0;
}	/* End main */

/*
 * setup() - performs all ONE TIME setup for this test.
 *	     Create a temporary directory and change directory to it.
 *	     Create a test file under temporary directory and close it
 *	     Create a symlink of testfile under temporary directory.
 */
void 
setup()
{
	int fd;

	/* capture signals */
	tst_sig(NOFORK, DEF_HANDLER, cleanup);

	/* Check that the test process id is super/root  */
	if (geteuid() != 0) {
		tst_brkm(TBROK, NULL, "Must be super/root for this test!");
		tst_exit();
	}

	/* Pause if that option was specified */
	TEST_PAUSE;
		
	/* make a temp directory and cd to it */
	tst_tmpdir();

	if ((fd = open(TESTFILE, O_RDWR|O_CREAT, FILE_MODE)) == -1) {
		tst_brkm(TBROK, cleanup,
			 "open(%s, O_RDWR|O_CREAT, %o) Failed, errno=%d : %s",
			 TESTFILE, FILE_MODE, errno, strerror(errno));
	}
	if (close(fd) == -1) {
		tst_brkm(TBROK, cleanup,
			 "close(%s) Failed, errno=%d : %s",
			 TESTFILE, errno, strerror(errno));
	}

	/* Create a symlink for testfile created */
	if (symlink(TESTFILE, SFILE) < 0) {
		tst_brkm(TBROK, cleanup,
			 "symlink() of %s Failed, errno=%d : %s",
			 TESTFILE, errno, strerror(errno));
	}
}

/*
 * cleanup() - performs all ONE TIME cleanup for this test at
 *	       completion or premature exit.
 *	       Remove the test directory and testfile created in the setup.
 */
void 
cleanup()
{
	/*
	 * print timing stats if that option was specified.
	 */
	TEST_CLEANUP;

	/* Remove tmp dir and all files in it */
	tst_rmdir();

	/* exit with return code appropriate for results */
	tst_exit();
}