/*
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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:
* This test should be run by root.
*
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <grp.h>
#include <pwd.h>
#include "test.h"
#include "safe_macros.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";
int TST_TOTAL = 1;
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;
mode_t dir_mode; /* mode permissions set on test directory */
tst_parse_opts(ac, av, NULL, NULL);
setup();
for (lc = 0; TEST_LOOPING(lc); lc++) {
tst_count = 0;
TEST(chmod(TESTDIR, PERMS));
if (TEST_RETURN == -1) {
tst_resm(TFAIL, "chmod(%s, %#o) failed",
TESTDIR, PERMS);
continue;
}
/*
* Get the directory information using
* stat(2).
*/
if (stat(TESTDIR, &stat_buf) < 0) {
tst_brkm(TFAIL | TERRNO, cleanup,
"stat(%s) failed", TESTDIR);
}
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 & ~S_ISGID) != dir_mode)
tst_resm(TFAIL, "%s: Incorrect modes 0%03o, "
"Expected 0%03o", TESTDIR, dir_mode,
PERMS & ~S_ISGID);
else
tst_resm(TPASS,
"Functionality of chmod(%s, %#o) successful",
TESTDIR, PERMS);
}
cleanup();
tst_exit();
}
/*
* 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(void)
{
struct passwd *nobody_u;
struct group *bin_group;
tst_require_root();
TEST_PAUSE;
tst_tmpdir();
nobody_u = getpwnam("nobody");
if (nobody_u == NULL)
tst_brkm(TBROK | TERRNO, cleanup,
"getpwnam(\"nobody\") failed");
#ifdef ANDROID
bin_group = getgrnam("everybody");
#else
bin_group = getgrnam("bin");
#endif
if (bin_group == NULL)
tst_brkm(TBROK | TERRNO, cleanup, "getgrnam(\"bin\") failed");
/*
* Create a test directory under temporary directory with specified
* mode permissions and change the gid of test directory to nobody's
* gid.
*/
SAFE_MKDIR(cleanup, TESTDIR, MODE_RWX);
if (setgroups(1, &nobody_u->pw_gid) == -1)
tst_brkm(TBROK | TERRNO, cleanup,
"setgroups to nobody's gid failed");
SAFE_CHOWN(cleanup, TESTDIR, nobody_u->pw_uid, bin_group->gr_gid);
/* change to nobody:nobody */
if (setegid(nobody_u->pw_gid) == -1 || seteuid(nobody_u->pw_uid) == -1)
tst_brkm(TBROK | TERRNO, cleanup,
"Couldn't switch to nobody:nobody");
}
void cleanup(void)
{
if (setegid(0) == -1)
tst_resm(TWARN | TERRNO, "setegid(0) failed");
if (seteuid(0) == -1)
tst_resm(TWARN | TERRNO, "seteuid(0) failed");
tst_rmdir();
}