chmod04.c revision d6d11d08678aac1ed2c370ea8e42e5f45aea07be 
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 <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
84#define DIR_MODE 	S_IRWXU | S_IRWXG | S_IRWXO
85#define PERMS		01777	/*
86				 * Mode permissions of test directory with
87				 * sticky bit set.
88				 */
89#define TESTDIR		"testdir_4"
90
91char *TCID = "chmod04";
92int TST_TOTAL = 1;
93char nobody_uid[] = "nobody";
94struct passwd *ltpuser;
95
96void setup();
97void cleanup();
98
99int main(int ac, char **av)
100{
101	struct stat stat_buf;	/* stat struct. */
102	int lc;
103	mode_t dir_mode;	/* mode permissions set on testdirectory */
104
105	tst_parse_opts(ac, av, NULL, NULL);
106
107	setup();
108
109	for (lc = 0; TEST_LOOPING(lc); lc++) {
110
111		tst_count = 0;
112
113		/*
114		 * Call chmod(2) with mode argument to
115		 * set sticky bit on TESTDIR
116		 */
117		TEST(chmod(TESTDIR, PERMS));
118
119		if (TEST_RETURN == -1) {
120			tst_resm(TFAIL | TTERRNO, "chmod(%s, %#o) failed",
121				 TESTDIR, PERMS);
122			continue;
123		}
124
125		/*
126		 * Get the file information using
127		 * stat(2).
128		 */
129		if (stat(TESTDIR, &stat_buf) < 0) {
130			tst_brkm(TFAIL, cleanup,
131				 "stat(2) of %s failed, errno:%d",
132				 TESTDIR, TEST_ERRNO);
133		}
134		dir_mode = stat_buf.st_mode;
135
136		/* Verify STICKY BIT SET on directory */
137		if ((dir_mode & PERMS) == PERMS) {
138			tst_resm(TPASS, "Functionality of "
139				 "chmod(%s, %#o) successful",
140				 TESTDIR, PERMS);
141		} else {
142			tst_resm(TFAIL, "%s: Incorrect modes 0%03o, "
143				 "Expected 0%03o",
144				 TESTDIR, dir_mode, PERMS);
145		}
146	}
147
148	cleanup();
149	tst_exit();
150}
151
152/*
153 * void
154 * setup() - performs all ONE TIME setup for this test.
155 *  Create a temporary directory and cd to it.
156 *  Create another test directory under temporary directory.
157 */
158void setup(void)
159{
160
161	tst_sig(NOFORK, DEF_HANDLER, cleanup);
162
163	tst_require_root(NULL);
164	ltpuser = getpwnam(nobody_uid);
165	if (setuid(ltpuser->pw_uid) == -1)
166		tst_resm(TINFO | TERRNO, "setuid(%u) failed", ltpuser->pw_uid);
167
168	TEST_PAUSE;
169
170	tst_tmpdir();
171
172	/*
173	 * Create a test directory under temporary directory with specified
174	 * mode permissios.
175	 */
176	if (mkdir(TESTDIR, DIR_MODE) < 0) {
177		tst_brkm(TBROK, cleanup, "mkdir(2) of %s failed", TESTDIR);
178	}
179}
180
181/*
182 * void
183 * cleanup() - performs all ONE TIME cleanup for this test at
184 *		completion or premature exit.
185 *  Remove the test directory and temporary directory created in setup().
186 */
187void cleanup(void)
188{
189
190	tst_rmdir();
191
192}
193