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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 <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 "safe_macros.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";
93int TST_TOTAL = 1;
94char nobody_uid[] = "nobody";
95struct passwd *ltpuser;
96
97void setup();
98void cleanup();
99
100int main(int ac, char **av)
101{
102	struct stat stat_buf;	/* stat struct. */
103	int lc;
104	mode_t dir_mode;	/* mode permissions set on testdirectory */
105
106	tst_parse_opts(ac, av, NULL, NULL);
107
108	setup();
109
110	for (lc = 0; TEST_LOOPING(lc); lc++) {
111
112		tst_count = 0;
113
114		/*
115		 * Call chmod(2) with mode argument to
116		 * set sticky bit on TESTDIR
117		 */
118		TEST(chmod(TESTDIR, PERMS));
119
120		if (TEST_RETURN == -1) {
121			tst_resm(TFAIL | TTERRNO, "chmod(%s, %#o) failed",
122				 TESTDIR, PERMS);
123			continue;
124		}
125
126		/*
127		 * Get the file information using
128		 * stat(2).
129		 */
130		if (stat(TESTDIR, &stat_buf) < 0) {
131			tst_brkm(TFAIL, cleanup,
132				 "stat(2) of %s failed, errno:%d",
133				 TESTDIR, TEST_ERRNO);
134		}
135		dir_mode = stat_buf.st_mode;
136
137		/* Verify STICKY BIT SET on directory */
138		if ((dir_mode & PERMS) == PERMS) {
139			tst_resm(TPASS, "Functionality of "
140				 "chmod(%s, %#o) successful",
141				 TESTDIR, PERMS);
142		} else {
143			tst_resm(TFAIL, "%s: Incorrect modes 0%03o, "
144				 "Expected 0%03o",
145				 TESTDIR, dir_mode, PERMS);
146		}
147	}
148
149	cleanup();
150	tst_exit();
151}
152
153/*
154 * void
155 * setup() - performs all ONE TIME setup for this test.
156 *  Create a temporary directory and cd to it.
157 *  Create another test directory under temporary directory.
158 */
159void setup(void)
160{
161
162	tst_sig(NOFORK, DEF_HANDLER, cleanup);
163
164	tst_require_root();
165	ltpuser = getpwnam(nobody_uid);
166	if (setuid(ltpuser->pw_uid) == -1)
167		tst_resm(TINFO | TERRNO, "setuid(%u) failed", ltpuser->pw_uid);
168
169	TEST_PAUSE;
170
171	tst_tmpdir();
172
173	/*
174	 * Create a test directory under temporary directory with specified
175	 * mode permissios.
176	 */
177	SAFE_MKDIR(cleanup, TESTDIR, DIR_MODE);
178}
179
180/*
181 * void
182 * cleanup() - performs all ONE TIME cleanup for this test at
183 *		completion or premature exit.
184 *  Remove the test directory and temporary directory created in setup().
185 */
186void cleanup(void)
187{
188
189	tst_rmdir();
190
191}
192