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 "safe_macros.h"
82 #include "compat_16.h"
83
84 #define FILE_MODE (S_IFREG|S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
85 #define NEW_PERMS1 (S_IFREG|S_IRWXU|S_IRWXG|S_ISUID|S_ISGID)
86 #define NEW_PERMS2 (S_IFREG|S_IRWXU|S_ISGID)
87 #define EXP_PERMS (S_IFREG|S_IRWXU|S_IRWXG)
88 #define TESTFILE1 "testfile1"
89 #define TESTFILE2 "testfile2"
90
91 TCID_DEFINE(chown02);
92
93 int setup1(); /* Test specific setup functions */
94 int setup2();
95
96 struct test_case_t {
97 char *pathname;
98 uid_t user_id;
99 gid_t group_id;
100 int test_flag;
101 int (*setupfunc) ();
102 } test_cases[] = {
103 /* setuid/setgid bits cleared */
104 {
105 TESTFILE1, 700, 701, 1, setup1},
106 /* setgid bit not cleared */
107 {
108 TESTFILE2, 700, 701, 2, setup2},};
109
110 int TST_TOTAL = ARRAY_SIZE(test_cases);
111
112 void setup(); /* setup function for the test */
113 void cleanup(); /* cleanup function for the test */
114
main(int ac,char ** av)115 int main(int ac, char **av)
116 {
117 struct stat stat_buf; /* stat(2) struct contents */
118 int lc;
119 int i;
120 uid_t user_id; /* user id of the user set for testfile */
121 gid_t group_id; /* group id of the user set for testfile */
122 int test_flag; /* test condition specific flag variable */
123 char *file_name; /* ptr. for test file name */
124
125 tst_parse_opts(ac, av, NULL, NULL);
126
127 setup();
128
129 for (lc = 0; TEST_LOOPING(lc); lc++) {
130
131 tst_count = 0;
132
133 for (i = 0; i < TST_TOTAL; i++) {
134
135 file_name = test_cases[i].pathname;
136 user_id = test_cases[i].user_id;
137 group_id = test_cases[i].group_id;
138 test_flag = test_cases[i].test_flag;
139
140 /*
141 * Call chown(2) with different user id and
142 * group id (numeric values) to set it on testfile.
143 */
144 TEST(CHOWN(cleanup, file_name, user_id, group_id));
145
146 if (TEST_RETURN == -1) {
147 tst_resm(TFAIL | TTERRNO,
148 "chown(%s, ..) failed", file_name);
149 continue;
150 }
151
152 /*
153 * Get the testfile information using stat(2).
154 */
155 if (stat(file_name, &stat_buf) < 0) {
156 tst_brkm(TFAIL, cleanup, "stat(2) of "
157 "%s failed, errno:%d",
158 file_name, TEST_ERRNO);
159 }
160
161 /*
162 * Check for expected Ownership ids
163 * set on testfile.
164 */
165 if (stat_buf.st_uid != user_id ||
166 stat_buf.st_gid != group_id) {
167 tst_brkm(TFAIL, cleanup, "%s: incorrect"
168 " ownership set, Expected %d "
169 "%d", file_name,
170 user_id, group_id);
171 }
172
173 /*
174 * Verify that S_ISUID/S_ISGID bits set on the
175 * testfile(s) in setup()s are cleared by
176 * chown().
177 */
178 if (test_flag == 1 &&
179 (stat_buf.st_mode & (S_ISUID | S_ISGID)) != 0) {
180 tst_resm(TFAIL,
181 "%s: incorrect mode "
182 "permissions %#o, Expected "
183 "%#o", file_name, NEW_PERMS1,
184 EXP_PERMS);
185 } else if (test_flag == 2
186 && (stat_buf.st_mode & S_ISGID) == 0) {
187 tst_resm(TFAIL,
188 "%s: Incorrect mode "
189 "permissions %#o, Expected "
190 "%#o", file_name,
191 stat_buf.st_mode, NEW_PERMS2);
192 } else {
193 tst_resm(TPASS,
194 "chown(%s, ..) succeeded",
195 file_name);
196 }
197 }
198 }
199
200 cleanup();
201 tst_exit();
202 }
203
204 /*
205 * void
206 * setup() - performs all ONE TIME setup for this test.
207 * Create a temporary directory and change directory to it.
208 * Create a test file under temporary directory and close it
209 */
setup(void)210 void setup(void)
211 {
212 int i;
213
214 tst_sig(NOFORK, DEF_HANDLER, cleanup);
215
216 tst_require_root();
217
218 TEST_PAUSE;
219
220 tst_tmpdir();
221
222 /* call iividual setup functions */
223 for (i = 0; i < TST_TOTAL; i++)
224 test_cases[i].setupfunc();
225 }
226
227 /*
228 * int
229 * setup1() - Setup function for chown(2) to verify setuid/setgid bits
230 * set on an executable file will not be cleared.
231 * Creat a testfile and set setuid/setgid bits on the mode of file.$
232 */
setup1(void)233 int setup1(void)
234 {
235 int fd; /* File descriptor for testfile1 */
236
237 /* Creat a testfile and close it */
238 if ((fd = open(TESTFILE1, O_RDWR | O_CREAT, FILE_MODE)) == -1)
239 tst_brkm(TBROK | TERRNO, cleanup,
240 "open(%s, O_RDWR|O_CREAT, %o) failed",
241 TESTFILE1, FILE_MODE);
242 SAFE_CLOSE(cleanup, fd);
243
244 /* Set setuid/setgid bits on the test file created */
245 SAFE_CHMOD(cleanup, TESTFILE1, NEW_PERMS1);
246 return 0;
247 }
248
249 /*
250 * int
251 * setup2() - Setup function for chown(2) to verify setgid bit set
252 * set on non-group executable file will not be cleared.
253 * Creat a testfile and set setgid bit on the mode of file.
254 */
setup2(void)255 int setup2(void)
256 {
257 int fd; /* File descriptor for testfile2 */
258
259 /* Creat a testfile and close it */
260 if ((fd = open(TESTFILE2, O_RDWR | O_CREAT, FILE_MODE)) == -1) {
261 tst_brkm(TBROK | TERRNO, cleanup,
262 "open(%s, O_RDWR|O_CREAT, %o) failed",
263 TESTFILE2, FILE_MODE);
264 }
265 /* Set setgid bit on the test file created */
266 if (fchmod(fd, NEW_PERMS2) != 0)
267 tst_brkm(TBROK | TERRNO, cleanup, "fchmod failed");
268 SAFE_CLOSE(cleanup, fd);
269 return 0;
270 }
271
272 /*
273 * void
274 * cleanup() - performs all ONE TIME cleanup for this test at
275 * completion or premature exit.
276 * Remove the test directory and testfile created in the setup.
277 */
cleanup(void)278 void cleanup(void)
279 {
280
281 tst_rmdir();
282
283 }
284