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: chown02
22 *
23 * Test Description:
24 * Verify that, when chown(2) invoked by super-user to change the owner and
25 * group of a file specified by path to any numeric owner(uid)/group(gid)
26 * values,
27 * - clears setuid and setgid bits set on an executable file.
28 * - preserves setgid bit set on a non-group-executable file.
29 *
30 * Expected Result:
31 * chown(2) should return 0 and the ownership set on the file should match
32 * the numeric values contained in owner and group respectively.
33 *
34 * Algorithm:
35 * Setup:
36 * Setup signal handling.
37 * Create temporary directory.
38 * Pause for SIGUSR1 if option specified.
39 *
40 * Test:
41 * Loop if the proper options are given.
42 * Execute system call
43 * Check return code, if system call failed (return=-1)
44 * Log the errno and Issue a FAIL message.
45 * Otherwise,
46 * Verify the Functionality of system call
47 * if successful,
48 * Issue Functionality-Pass message.
49 * Otherwise,
50 * Issue Functionality-Fail message.
51 * Cleanup:
52 * Print errno log and/or timing stats if options given
53 * Delete the temporary directory created.
54 *
55 * Usage: <for command-line>
56 * chown02 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
57 * where, -c n : Run n copies concurrently.
58 * -f : Turn off functionality Testing.
59 * -i n : Execute test n times.
60 * -I x : Execute test for x seconds.
61 * -P x : Pause for x seconds between iterations.
62 * -t : Turn on syscall timing.
63 *
64 * HISTORY
65 * 07/2001 Ported by Wayne Boyer
66 *
67 * RESTRICTIONS:
68 * This test should be run by 'super-user' (root) only.
69 *
70 */
71
72 #include <stdio.h>
73 #include <sys/types.h>
74 #include <sys/stat.h>
75 #include <fcntl.h>
76 #include <errno.h>
77 #include <string.h>
78 #include <signal.h>
79
80 #include "test.h"
81 #include "compat_16.h"
82
83 #define FILE_MODE (S_IFREG|S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
84 #define NEW_PERMS1 (S_IFREG|S_IRWXU|S_IRWXG|S_ISUID|S_ISGID)
85 #define NEW_PERMS2 (S_IFREG|S_IRWXU|S_ISGID)
86 #define EXP_PERMS (S_IFREG|S_IRWXU|S_IRWXG)
87 #define TESTFILE1 "testfile1"
88 #define TESTFILE2 "testfile2"
89
90 TCID_DEFINE(chown02);
91
92 int setup1(); /* Test specific setup functions */
93 int setup2();
94
95 struct test_case_t {
96 char *pathname;
97 uid_t user_id;
98 gid_t group_id;
99 int test_flag;
100 int (*setupfunc) ();
101 } test_cases[] = {
102 /* setuid/setgid bits cleared */
103 {
104 TESTFILE1, 700, 701, 1, setup1},
105 /* setgid bit not cleared */
106 {
107 TESTFILE2, 700, 701, 2, setup2},};
108
109 int TST_TOTAL = ARRAY_SIZE(test_cases);
110
111 void setup(); /* setup function for the test */
112 void cleanup(); /* cleanup function for the test */
113
main(int ac,char ** av)114 int main(int ac, char **av)
115 {
116 struct stat stat_buf; /* stat(2) struct contents */
117 int lc;
118 int i;
119 uid_t user_id; /* user id of the user set for testfile */
120 gid_t group_id; /* group id of the user set for testfile */
121 int test_flag; /* test condition specific flag variable */
122 char *file_name; /* ptr. for test file name */
123
124 tst_parse_opts(ac, av, NULL, NULL);
125
126 setup();
127
128 for (lc = 0; TEST_LOOPING(lc); lc++) {
129
130 tst_count = 0;
131
132 for (i = 0; i < TST_TOTAL; i++) {
133
134 file_name = test_cases[i].pathname;
135 user_id = test_cases[i].user_id;
136 group_id = test_cases[i].group_id;
137 test_flag = test_cases[i].test_flag;
138
139 /*
140 * Call chown(2) with different user id and
141 * group id (numeric values) to set it on testfile.
142 */
143 TEST(CHOWN(cleanup, file_name, user_id, group_id));
144
145 if (TEST_RETURN == -1) {
146 tst_resm(TFAIL | TTERRNO,
147 "chown(%s, ..) failed", file_name);
148 continue;
149 }
150
151 /*
152 * Get the testfile information using stat(2).
153 */
154 if (stat(file_name, &stat_buf) < 0) {
155 tst_brkm(TFAIL, cleanup, "stat(2) of "
156 "%s failed, errno:%d",
157 file_name, TEST_ERRNO);
158 }
159
160 /*
161 * Check for expected Ownership ids
162 * set on testfile.
163 */
164 if (stat_buf.st_uid != user_id ||
165 stat_buf.st_gid != group_id) {
166 tst_brkm(TFAIL, cleanup, "%s: incorrect"
167 " ownership set, Expected %d "
168 "%d", file_name,
169 user_id, group_id);
170 }
171
172 /*
173 * Verify that S_ISUID/S_ISGID bits set on the
174 * testfile(s) in setup()s are cleared by
175 * chown().
176 */
177 if (test_flag == 1 &&
178 (stat_buf.st_mode & (S_ISUID | S_ISGID)) != 0) {
179 tst_resm(TFAIL,
180 "%s: incorrect mode "
181 "permissions %#o, Expected "
182 "%#o", file_name, NEW_PERMS1,
183 EXP_PERMS);
184 } else if (test_flag == 2
185 && (stat_buf.st_mode & S_ISGID) == 0) {
186 tst_resm(TFAIL,
187 "%s: Incorrect mode "
188 "permissions %#o, Expected "
189 "%#o", file_name,
190 stat_buf.st_mode, NEW_PERMS2);
191 } else {
192 tst_resm(TPASS,
193 "chown(%s, ..) succeeded",
194 file_name);
195 }
196 }
197 }
198
199 cleanup();
200 tst_exit();
201 }
202
203 /*
204 * void
205 * setup() - performs all ONE TIME setup for this test.
206 * Create a temporary directory and change directory to it.
207 * Create a test file under temporary directory and close it
208 */
setup(void)209 void setup(void)
210 {
211 int i;
212
213 tst_sig(NOFORK, DEF_HANDLER, cleanup);
214
215 tst_require_root();
216
217 TEST_PAUSE;
218
219 tst_tmpdir();
220
221 /* call iividual setup functions */
222 for (i = 0; i < TST_TOTAL; i++)
223 test_cases[i].setupfunc();
224 }
225
226 /*
227 * int
228 * setup1() - Setup function for chown(2) to verify setuid/setgid bits
229 * set on an executable file will not be cleared.
230 * Creat a testfile and set setuid/setgid bits on the mode of file.$
231 */
setup1(void)232 int setup1(void)
233 {
234 int fd; /* File descriptor for testfile1 */
235
236 /* Creat a testfile and close it */
237 if ((fd = open(TESTFILE1, O_RDWR | O_CREAT, FILE_MODE)) == -1)
238 tst_brkm(TBROK | TERRNO, cleanup,
239 "open(%s, O_RDWR|O_CREAT, %o) failed",
240 TESTFILE1, FILE_MODE);
241 if (close(fd) == -1)
242 tst_brkm(TBROK | TERRNO, cleanup, "close(%s) failed",
243 TESTFILE1);
244
245 /* Set setuid/setgid bits on the test file created */
246 if (chmod(TESTFILE1, NEW_PERMS1) == -1)
247 tst_brkm(TBROK | TERRNO, cleanup, "chmod(%s, ..) failed",
248 TESTFILE1);
249 return 0;
250 }
251
252 /*
253 * int
254 * setup2() - Setup function for chown(2) to verify setgid bit set
255 * set on non-group executable file will not be cleared.
256 * Creat a testfile and set setgid bit on the mode of file.
257 */
setup2(void)258 int setup2(void)
259 {
260 int fd; /* File descriptor for testfile2 */
261
262 /* Creat a testfile and close it */
263 if ((fd = open(TESTFILE2, O_RDWR | O_CREAT, FILE_MODE)) == -1) {
264 tst_brkm(TBROK | TERRNO, cleanup,
265 "open(%s, O_RDWR|O_CREAT, %o) failed",
266 TESTFILE2, FILE_MODE);
267 }
268 /* Set setgid bit on the test file created */
269 if (fchmod(fd, NEW_PERMS2) != 0)
270 tst_brkm(TBROK | TERRNO, cleanup, "fchmod failed");
271 if (close(fd) == -1)
272 tst_brkm(TBROK | TERRNO, cleanup, "close(%s) failed",
273 TESTFILE2);
274 return 0;
275 }
276
277 /*
278 * void
279 * cleanup() - performs all ONE TIME cleanup for this test at
280 * completion or premature exit.
281 * Remove the test directory and testfile created in the setup.
282 */
cleanup(void)283 void cleanup(void)
284 {
285
286 tst_rmdir();
287
288 }
289