chmod04.c revision 1e6f5a673655551de5734ff31ef48cd63b604e6d 
1/*
2 *
3 *   Copyright (c) International Business Machines  Corp., 2001
4 *
5 *   This program is free software;  you can redistribute it and/or modify
6 *   it under the terms of the GNU General Public License as published by
7 *   the Free Software Foundation; either version 2 of the License, or
8 *   (at your option) any later version.
9 *
10 *   This program is distributed in the hope that it will be useful,
11 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
13 *   the GNU General Public License for more details.
14 *
15 *   You should have received a copy of the GNU General Public License
16 *   along with this program;  if not, write to the Free Software
17 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20/*
21 * Test Name: chmod04
22 *
23 * Test Description:
24 *  Verify that, chmod(2) will succeed to change the mode of a directory
25 *  and set the sticky bit on it if invoked by non-root (uid != 0) process
26 *  with the following constraints,
27 *	- the process is the owner of the directory.
28 *	- the effective group ID or one of the supplementary group ID's of the
29 *	  process is equal to the group ID of the directory.
30 *
31 * Expected Result:
32 *  chmod() should return value 0 on success and succeeds to set sticky bit
33 *  on the specified directory.
34 *
35 * Algorithm:
36 *  Setup:
37 *   Setup signal handling.
38 *   Create temporary directory.
39 *   Pause for SIGUSR1 if option specified.
40 *
41 *  Test:
42 *   Loop if the proper options are given.
43 *   Execute system call
44 *   Check return code, if system call failed (return=-1)
45 *   	Log the errno and Issue a FAIL message.
46 *   Otherwise,
47 *   	Verify the Functionality of system call
48 *      if successful,
49 *      	Issue Functionality-Pass message.
50 *      Otherwise,
51 *		Issue Functionality-Fail message.
52 *  Cleanup:
53 *   Print errno log and/or timing stats if options given
54 *   Delete the temporary directory created.
55 *
56 * Usage:  <for command-line>
57 *  chmod04 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
58 *     where,  -c n : Run n copies concurrently.
59 *             -f   : Turn off functionality Testing.
60 *	       -i n : Execute test n times.
61 *	       -I x : Execute test for x seconds.
62 *	       -P x : Pause for x seconds between iterations.
63 *	       -t   : Turn on syscall timing.
64 *
65 * HISTORY
66 *	07/2001 Ported by Wayne Boyer
67 *
68 * RESTRICTIONS:
69 *  This test should be run by 'non-super-user' only.
70 *
71 */
72
73#include <stdio.h>
74#include <sys/types.h>
75#include <sys/stat.h>
76#include <sys/fcntl.h>
77#include <errno.h>
78#include <string.h>
79#include <signal.h>
80#include <pwd.h>
81
82#include "test.h"
83#include "usctest.h"
84
85#define DIR_MODE 	S_IRWXU | S_IRWXG | S_IRWXO
86#define PERMS		01777	/*
87				 * Mode permissions of test directory with
88				 * sticky bit set.
89				 */
90#define TESTDIR		"testdir_4"
91
92char *TCID = "chmod04";		/* Test program identifier.    */
93int TST_TOTAL = 1;		/* Total number of test cases. */
94char nobody_uid[] = "nobody";
95struct passwd *ltpuser;
96
97void setup();			/* Setup function for the test */
98void cleanup();			/* Cleanup function for the test */
99
100int main(int ac, char **av)
101{
102	struct stat stat_buf;	/* stat struct. */
103	int lc;			/* loop counter */
104	char *msg;		/* message returned from parse_opts */
105	mode_t dir_mode;	/* mode permissions set on testdirectory */
106
107	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL)
108		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
109
110	setup();
111
112	for (lc = 0; TEST_LOOPING(lc); lc++) {
113
114		Tst_count = 0;
115
116		/*
117		 * Call chmod(2) with mode argument to
118		 * set sticky bit on TESTDIR
119		 */
120		TEST(chmod(TESTDIR, PERMS));
121
122		if (TEST_RETURN == -1) {
123			tst_resm(TFAIL|TTERRNO, "chmod(%s, %#o) failed",
124				 TESTDIR, PERMS);
125			continue;
126		}
127
128		/*
129		 * Perform functional verification if test
130		 * executed without (-f) option.
131		 */
132		if (STD_FUNCTIONAL_TEST) {
133			/*
134			 * Get the file information using
135			 * stat(2).
136			 */
137			if (stat(TESTDIR, &stat_buf) < 0) {
138				tst_brkm(TFAIL, cleanup,
139					 "stat(2) of %s failed, errno:%d",
140					 TESTDIR, TEST_ERRNO);
141			}
142			dir_mode = stat_buf.st_mode;
143
144			/* Verify STICKY BIT SET on directory */
145			if ((dir_mode & PERMS) == PERMS) {
146				tst_resm(TPASS, "Functionality of "
147					 "chmod(%s, %#o) successful",
148					 TESTDIR, PERMS);
149			} else {
150				tst_resm(TFAIL, "%s: Incorrect modes 0%03o, "
151					 "Expected 0%03o",
152					 TESTDIR, dir_mode, PERMS);
153			}
154		} else
155			tst_resm(TPASS, "call succeeded");
156	}
157
158	cleanup();
159	tst_exit();
160}
161
162/*
163 * void
164 * setup() - performs all ONE TIME setup for this test.
165 *  Create a temporary directory and cd to it.
166 *  Create another test directory under temporary directory.
167 */
168void setup()
169{
170
171	tst_sig(NOFORK, DEF_HANDLER, cleanup);
172
173	tst_require_root(NULL);
174	ltpuser = getpwnam(nobody_uid);
175	if (setuid(ltpuser->pw_uid) == -1)
176		tst_resm(TINFO|TERRNO, "setuid(%u) failed", ltpuser->pw_uid);
177
178	TEST_PAUSE;
179
180	tst_tmpdir();
181
182	/*
183	 * Create a test directory under temporary directory with specified
184	 * mode permissios.
185	 */
186	if (mkdir(TESTDIR, DIR_MODE) < 0) {
187		tst_brkm(TBROK, cleanup, "mkdir(2) of %s failed", TESTDIR);
188	}
189}
190
191/*
192 * void
193 * cleanup() - performs all ONE TIME cleanup for this test at
194 *		completion or premature exit.
195 *  Remove the test directory and temporary directory created in setup().
196 */
197void cleanup()
198{
199	/*
200	 * print timing stats if that option was specified.
201	 */
202	TEST_CLEANUP;
203
204	tst_rmdir();
205
206}