chmod04.c revision 2c9452499e6aa5681ccb1cc52c6009c06a2c0702 
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. */
94extern int Tst_count;		/* Test Case counter for tst_* routines */
95char nobody_uid[] = "nobody";
96struct passwd *ltpuser;
97
98void setup();			/* Setup function for the test */
99void cleanup();			/* Cleanup function for the test */
100
101int
102main(int ac, char **av)
103{
104	struct stat stat_buf;	/* stat struct. */
105	int lc;			/* loop counter */
106	char *msg;		/* message returned from parse_opts */
107	mode_t dir_mode;	/* mode permissions set on testdirectory */
108
109	/* Parse standard options given to run the test. */
110	msg = parse_opts(ac, av, (option_t *) NULL, NULL);
111	if (msg != (char *) NULL) {
112		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
113		tst_exit();
114	}
115
116	/* Perform global setup for test */
117	setup();
118
119	/* Check looping state if -i option given */
120	for (lc = 0; TEST_LOOPING(lc); lc++) {
121		/* Reset Tst_count in case we are looping. */
122		Tst_count = 0;
123
124		/*
125	 	 * Call chmod(2) with mode argument to
126		 * set sticky bit on TESTDIR
127	 	 */
128		TEST(chmod(TESTDIR, PERMS));
129
130		/* check return code of chmod(2) */
131		if (TEST_RETURN == -1) {
132			tst_resm(TFAIL, "chmod(%s, %#o) Failed, errno=%d : %s",
133				 TESTDIR, PERMS, TEST_ERRNO,
134				 strerror(TEST_ERRNO));
135			continue;
136		}
137
138		/*
139		 * Perform functional verification if test
140		 * executed without (-f) option.
141		 */
142		if (STD_FUNCTIONAL_TEST) {
143			/*
144			 * Get the file information using
145			 * stat(2).
146			 */
147			if (stat(TESTDIR, &stat_buf) < 0) {
148				tst_brkm(TFAIL, cleanup,
149					 "stat(2) of %s failed, errno:%d",
150					 TESTDIR, TEST_ERRNO);
151			}
152			dir_mode = stat_buf.st_mode;
153
154			/* Verify STICKY BIT SET on directory */
155			if ((dir_mode & PERMS) == PERMS) {
156				tst_resm(TPASS, "Functionality of "
157					 "chmod(%s, %#o) successful",
158					 TESTDIR, PERMS);
159			} else {
160				tst_resm(TFAIL, "%s: Incorrect modes 0%03o, "
161					 "Expected 0%03o",
162					 TESTDIR, dir_mode, PERMS);
163			}
164		} else {
165			tst_resm(TPASS, "call succeeded");
166		}
167	}	/* End for TEST_LOOPING */
168
169	/* Call cleanup() to undo setup done for the test. */
170	cleanup();
171
172	return 0;
173	/*NOTREACHED*/
174}	/* End main */
175
176/*
177 * void
178 * setup() - performs all ONE TIME setup for this test.
179 *  Create a temporary directory and cd to it.
180 *  Create another test directory under temporary directory.
181 */
182void
183setup()
184{
185	/* capture signals */
186	tst_sig(NOFORK, DEF_HANDLER, cleanup);
187
188	/* Switch to nobody user for correct error code collection */
189        if (geteuid() != 0) {
190                tst_brkm(TBROK, tst_exit, "Test must be run as root");
191        }
192         ltpuser = getpwnam(nobody_uid);
193         if (setuid(ltpuser->pw_uid) == -1) {
194                tst_resm(TINFO, "setuid failed to "
195                         "to set the effective uid to %d",
196                         ltpuser->pw_uid);
197                perror("setuid");
198         }
199
200
201        /* Pause if that option was specified */
202        TEST_PAUSE;
203
204	/* make a temp directory and cd to it */
205	tst_tmpdir();
206
207	/*
208	 * Create a test directory under temporary directory with specified
209	 * mode permissios.
210	 */
211	if (mkdir(TESTDIR, DIR_MODE) < 0) {
212		tst_brkm(TBROK, cleanup, "mkdir(2) of %s failed", TESTDIR);
213	}
214}	/* End setup() */
215
216/*
217 * void
218 * cleanup() - performs all ONE TIME cleanup for this test at
219 *		completion or premature exit.
220 *  Remove the test directory and temporary directory created in setup().
221 */
222void
223cleanup()
224{
225	/*
226	 * print timing stats if that option was specified.
227	 */
228	TEST_CLEANUP;
229
230	/* Remove tmp dir and all files in it */
231	tst_rmdir();
232
233	/* exit with return code appropriate for results */
234	tst_exit();
235}	/* End cleanup() */
236