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/*
*
* 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: chmod05
*
* Test Description:
//wjh
//This test seems to be invalid see comments below
//The man page for chmod doesn't seem to indicate that the setgid bit can
//only be set by root
* Verify that, chmod(2) will succeed to change the mode of a directory
* but fails to set the setgid 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 not equal to the group ID of the directory.
*
* Expected Result:
* chmod() should return value 0 on success and though succeeds to change
* the mode of a directory but fails to set setgid bit on it.
*
* 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>
* chmod05 [-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
* 05/2002 Fixes by wjhuie and Ferhan Shareef
* changed conditional to check for valid tests only and
* in a more logically understandable way
* 07/2002 Additional fixes to #defines to allow comparisions to work.
* -Robbie Williamson
*
* RESTRICTIONS:
//wjh
//Actually it seems that this test has to be run by root (check setup()) and
//it calls another program (change_owner) to change ownership on the directory
//it creates. But this test never gives up it's uid/gid to be nonroot
* This test should be run by 'non-super-user' only.
*
*/
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/fcntl.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <grp.h>
#include <pwd.h>
#include "test.h"
#include "usctest.h"
#define DEBUG 0
#define MODE_RWX (mode_t)(S_IRWXU | S_IRWXG | S_IRWXO)
#define DIR_MODE (mode_t)(S_ISVTX | S_ISGID | S_IFDIR)
#define PERMS (mode_t)(MODE_RWX | DIR_MODE)
#define TESTDIR "testdir"
char *TCID="chmod05"; /* Test program identifier. */
int TST_TOTAL=1; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
void setup(); /* Main setup function for test */
void cleanup(); /* Main cleanup function for 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 test directory */
/* 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 setgid 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;
}
//wjh should this even be an option? Run but don't test anything?
/*
* Perform functional verification if test
* executed without (-f) option.
*/
if (STD_FUNCTIONAL_TEST)
{
/*
* Get the directory information using
* stat(2).
*/
if (stat(TESTDIR, &stat_buf) < 0)
{
tst_brkm(TFAIL, cleanup,
"stat() of %s failed, errno:%d",
TESTDIR, TEST_ERRNO);
}
dir_mode = stat_buf.st_mode;
#if DEBUG
printf("DIR_MODE = 0%03o\n", DIR_MODE);
printf("MODE_RWX = 0%03o\n", MODE_RWX);
printf("PERMS = 0%03o\n", PERMS);
printf("dir_mode = 0%03o\n", dir_mode);
#endif
if ( PERMS != dir_mode)
{
tst_resm(TFAIL, "%s: Incorrect modes 0%03o, "
"Expected 0%03o", TESTDIR, dir_mode, PERMS);
}
else
{
tst_resm(TPASS, "Functionality of chmod(%s, %#o) successful",
TESTDIR, 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 a test directory under temporary directory.
//wjh we are root so do we really need this kluged helper program?
* Invoke setuid to root program to modify group ownership
* on test directory.
*/
void setup()
{
char *test_home; /* variable to hold TESTHOME env */
char Path_name[PATH_MAX]; /* Buffer to hold command string */
char Cmd_buffer[BUFSIZ]; /* Buffer to hold command string */
/* capture signals */
tst_sig(FORK, DEF_HANDLER, cleanup);
//wjh Improper comment! This makes sure we _are_ "root" not "nobody"
/* Switch to nobody user for correct error code collection */
if (geteuid() != 0)
{
tst_brkm(TBROK, tst_exit, "Test must be run as root");
}
test_home = get_current_dir_name();
/* 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 permissions and change the gid of test directory to that of
//wjh Improper comment! Ownership it changed to "nobody"
* guest user2.
*/
if (mkdir(TESTDIR, MODE_RWX) < 0)
{
tst_brkm(TBROK, cleanup, "mkdir(2) of %s failed", TESTDIR);
}
/* Get the current working directory of the process */
if (getcwd(Path_name, sizeof(Path_name)) == NULL)
{
tst_brkm(TBROK, cleanup,
"getcwd(3) fails to get working directory of process");
}
/*
* Get the complete path of TESTDIR created
* under temporary directory
*/
strcat(Path_name, "/"TESTDIR);
/* Get the command name to be executed as setuid to root */
strcpy((char *)Cmd_buffer, (const char *)test_home);
strcat((char *)Cmd_buffer, (const char *)"/change_owner ");
strcat((char *)Cmd_buffer, TCID);
strcat((char *)Cmd_buffer, " ");
strcat((char *)Cmd_buffer, Path_name);
if (system((const char *)Cmd_buffer) != 0)
{
tst_brkm(TBROK, cleanup,
"Fail to modify %s group ownership", 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
* 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();
} /* End cleanup() */