testcases/kernel/syscalls/chmod/chmod04.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: chmod04
 *
 * Test Description:
 *  Verify that, chmod(2) will succeed to change the mode of a directory
 *  and set the sticky bit on it if invoked by non-root (uid != 0) process
 *  with the following constraints,
 *	- the process is the owner of the directory.
 *	- the effective group ID or one of the supplementary group ID's of the
 *	  process is equal to the group ID of the directory.
 *
 * Expected Result:
 *  chmod() should return value 0 on success and succeeds to set sticky bit
 *  on the specified directory.
 *
 * 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>
 *  chmod04 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
 *     where,  -c n : Run n copies concurrently.
 *             -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 'non-super-user' 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 <pwd.h>

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

#define DIR_MODE 	S_IRWXU | S_IRWXG | S_IRWXO
#define PERMS		01777	/*
				 * Mode permissions of test directory with
				 * sticky bit set.
				 */
#define TESTDIR		"testdir_4"

char *TCID="chmod04"; 		/* Test program identifier.    */
int TST_TOTAL=1;    		/* Total number of test cases. */
extern int Tst_count;		/* Test Case counter for tst_* routines */
char nobody_uid[] = "nobody";
struct passwd *ltpuser;

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 struct. */
	int lc;			/* loop counter */
	char *msg;		/* message returned from parse_opts */
	mode_t dir_mode;	/* mode permissions set on testdirectory */
   
	/* 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;

		/*
	 	 * Call chmod(2) with mode argument to
		 * set sticky bit on TESTDIR
	 	 */
		TEST(chmod(TESTDIR, PERMS));

		/* check return code of chmod(2) */
		if (TEST_RETURN == -1) {
			tst_resm(TFAIL, "chmod(%s, %#o) Failed, errno=%d : %s",
				 TESTDIR, PERMS, TEST_ERRNO,
				 strerror(TEST_ERRNO));
			continue;
		}

		/*
		 * Perform functional verification if test
		 * executed without (-f) option.
		 */
		if (STD_FUNCTIONAL_TEST) {
			/*
			 * Get the file information using
			 * stat(2).
			 */
			if (stat(TESTDIR, &stat_buf) < 0) {
				tst_brkm(TFAIL, cleanup,
					 "stat(2) of %s failed, errno:%d",
					 TESTDIR, TEST_ERRNO);
			}
			dir_mode = stat_buf.st_mode;

			/* Verify STICKY BIT SET on directory */
			if ((dir_mode & PERMS) == PERMS) {
				tst_resm(TPASS, "Functionality of "
					 "chmod(%s, %#o) successful",
					 TESTDIR, PERMS);
			} else {
				tst_resm(TFAIL, "%s: Incorrect modes 0%03o, "
					 "Expected 0%03o",
					 TESTDIR, dir_mode, PERMS);
			}
		} else {
			tst_resm(TPASS, "call succeeded");
		}
	}	/* End for TEST_LOOPING */

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

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

/*
 * void
 * setup() - performs all ONE TIME setup for this test.
 *  Create a temporary directory and cd to it.
 *  Create another test directory under temporary directory.
 */
void
setup()
{
	/* capture signals */
	tst_sig(NOFORK, DEF_HANDLER, cleanup);

	/* Switch to nobody user for correct error code collection */
        if (geteuid() != 0) {
                tst_brkm(TBROK, tst_exit, "Test must be run as root");
        }
         ltpuser = getpwnam(nobody_uid);
         if (setuid(ltpuser->pw_uid) == -1) {
                tst_resm(TINFO, "setuid failed to "
                         "to set the effective uid to %d",
                         ltpuser->pw_uid);
                perror("setuid");
         }


        /* Pause if that option was specified */
        TEST_PAUSE;

	/* make a temp directory and cd to it */
	tst_tmpdir();

	/*
	 * Create a test directory under temporary directory with specified
	 * mode permissios.
	 */
	if (mkdir(TESTDIR, DIR_MODE) < 0) {
		tst_brkm(TBROK, cleanup, "mkdir(2) of %s failed", TESTDIR);
	}
}	/* End setup() */

/*
 * void
 * cleanup() - performs all ONE TIME cleanup for this test at
 *		completion or premature exit.
 *  Remove the test directory and temporary directory created in 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();
}	/* End cleanup() */