1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 /*
20 * Test Name: chmod03
21 *
22 * Test Description:
23 * Verify that, chmod(2) will succeed to change the mode of a file
24 * and set the sticky bit on it if invoked by non-root (uid != 0)
25 * process with the following constraints,
26 * - the process is the owner of the file.
27 * - the effective group ID or one of the supplementary group ID's of the
28 * process is equal to the group ID of the file.
29 *
30 * Expected Result:
31 * chmod() should return value 0 on success and succeeds to change
32 * the mode of specified file with sticky bit set on it.
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 * chmod03 [-c n] [-e] [-f] [-i n] [-I x] [-p x] [-t]
57 * where, -c n : Run n copies concurrently.
58 * -e : Turn on errno logging.
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 FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
86 #define PERMS 01777 /*
87 * Mode permissions of test file with sticky
88 * bit set.
89 */
90 #define TESTFILE "testfile"
91
92 char *TCID = "chmod03";
93 int TST_TOTAL = 1;
94 char nobody_uid[] = "nobody";
95 struct passwd *ltpuser;
96
97 void setup(); /* Main setup function for the test */
98 void cleanup(); /* Main cleanup function for the test */
99
main(int ac,char ** av)100 int main(int ac, char **av)
101 {
102 struct stat stat_buf;
103 int lc;
104 mode_t file_mode;
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 TEST(chmod(TESTFILE, PERMS));
115
116 if (TEST_RETURN == -1) {
117 tst_resm(TFAIL | TTERRNO, "chmod(%s, %#o) failed",
118 TESTFILE, PERMS);
119 continue;
120 }
121 if (stat(TESTFILE, &stat_buf) < 0) {
122 tst_brkm(TFAIL | TERRNO, cleanup,
123 "stat(%s) failed", TESTFILE);
124 }
125 file_mode = stat_buf.st_mode;
126
127 /* Verify STICKY BIT set on testfile */
128 if ((file_mode & PERMS) != PERMS) {
129 tst_resm(TFAIL, "%s: Incorrect modes 0%3o, "
130 "Expected 0777", TESTFILE, file_mode);
131 } else {
132 tst_resm(TPASS, "Functionality of "
133 "chmod(%s, %#o) successful",
134 TESTFILE, PERMS);
135 }
136 }
137
138 cleanup();
139 tst_exit();
140 }
141
setup(void)142 void setup(void)
143 {
144 int fd;
145
146 tst_sig(NOFORK, DEF_HANDLER, cleanup);
147
148 tst_require_root();
149 ltpuser = getpwnam(nobody_uid);
150 if (ltpuser == NULL)
151 tst_brkm(TBROK | TERRNO, NULL, "getpwnam failed");
152 SAFE_SETUID(NULL, ltpuser->pw_uid);
153
154 TEST_PAUSE;
155
156 tst_tmpdir();
157
158 /*
159 * Create a test file under temporary directory with specified
160 * mode permissios and set the ownership of the test file to the
161 * uid/gid of guest user.
162 */
163 if ((fd = open(TESTFILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) {
164 tst_brkm(TBROK | TERRNO, cleanup,
165 "open(%s, O_RDWR|O_CREAT, %#o) failed",
166 TESTFILE, FILE_MODE);
167 }
168
169 SAFE_CLOSE(cleanup, fd);
170 }
171
172 /*
173 * void
174 * cleanup() - performs all ONE TIME cleanup for this test at
175 * completion or premature exit.
176 * Delete the testfile and temporary directory created in setup().
177 */
cleanup(void)178 void cleanup(void)
179 {
180
181 tst_rmdir();
182
183 }
184