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: chown03
22 *
23 * Test Description:
24 * Verify that, chown(2) succeeds to change the group of a file specified
25 * by path when called by non-root user with the following constraints,
26 * - euid of the process is equal to the owner of the file.
27 * - the intended gid is either egid, or one of the supplementary gids
28 * of the process.
29 * Also, verify that chown() clears the setuid/setgid bits set on the file.
30 *
31 * Expected Result:
32 * chown(2) should return 0 and the ownership set on the file should match
33 * the numeric values contained in owner and group respectively.
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 * chown03 [-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 *
70 */
71
72 #include <stdio.h>
73 #include <stdlib.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 <grp.h>
81 #include <pwd.h>
82
83 #include "test.h"
84 #include "compat_16.h"
85
86 #define FILE_MODE (S_IFREG|S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
87 #define NEW_PERMS (S_IFREG|S_IRWXU|S_IRWXG|S_ISUID|S_ISGID)
88 #define TESTFILE "testfile"
89
90 TCID_DEFINE(chown03);
91 int TST_TOTAL = 1; /* Total number of test conditions */
92 char nobody_uid[] = "nobody";
93 struct passwd *ltpuser;
94
95 void setup(); /* setup function for the test */
96 void cleanup(); /* cleanup function for the test */
97
main(int ac,char ** av)98 int main(int ac, char **av)
99 {
100 struct stat stat_buf; /* stat(2) struct contents */
101 int lc;
102 uid_t user_id; /* Owner id of the test file. */
103 gid_t group_id; /* Group id of the test file. */
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 UID16_CHECK((user_id = geteuid()), "chown", cleanup)
114 GID16_CHECK((group_id = getegid()), "chown", cleanup)
115
116 TEST(CHOWN(cleanup, TESTFILE, -1, group_id));
117
118 if (TEST_RETURN == -1) {
119 tst_resm(TFAIL | TTERRNO, "chown(%s, ..) failed",
120 TESTFILE);
121 continue;
122 }
123
124 if (stat(TESTFILE, &stat_buf) == -1)
125 tst_brkm(TFAIL | TERRNO, cleanup,
126 "stat failed");
127
128 if (stat_buf.st_uid != user_id ||
129 stat_buf.st_gid != group_id)
130 tst_resm(TFAIL, "%s: Incorrect ownership"
131 "set to %d %d, Expected %d %d",
132 TESTFILE, stat_buf.st_uid,
133 stat_buf.st_gid, user_id, group_id);
134
135 if (stat_buf.st_mode !=
136 (NEW_PERMS & ~(S_ISUID | S_ISGID)))
137 tst_resm(TFAIL, "%s: incorrect mode permissions"
138 " %#o, Expected %#o", TESTFILE,
139 stat_buf.st_mode,
140 NEW_PERMS & ~(S_ISUID | S_ISGID));
141 else
142 tst_resm(TPASS, "chown(%s, ..) was successful",
143 TESTFILE);
144 }
145
146 cleanup();
147 tst_exit();
148 }
149
150 /*
151 * void
152 * setup() - performs all ONE TIME setup for this test.
153 * Create a temporary directory and change directory to it.
154 * Create a test file under temporary directory and close it
155 * Change the group ownership on testfile.
156 */
setup(void)157 void setup(void)
158 {
159 int fd; /* file handler for testfile */
160
161 TEST_PAUSE;
162
163 tst_require_root();
164
165 tst_sig(FORK, DEF_HANDLER, cleanup);
166
167 tst_tmpdir();
168
169 ltpuser = getpwnam(nobody_uid);
170 if (ltpuser == NULL)
171 tst_brkm(TBROK | TERRNO, NULL, "getpwnam(\"nobody\") failed");
172 if (setegid(ltpuser->pw_gid) == -1)
173 tst_brkm(TBROK | TERRNO, NULL, "setegid(%d) failed",
174 ltpuser->pw_gid);
175 if (seteuid(ltpuser->pw_uid) == -1)
176 tst_brkm(TBROK | TERRNO, NULL, "seteuid(%d) failed",
177 ltpuser->pw_uid);
178
179 /* Create a test file under temporary directory */
180 if ((fd = open(TESTFILE, O_RDWR | O_CREAT, FILE_MODE)) == -1)
181 tst_brkm(TBROK | TERRNO, cleanup,
182 "open(%s, O_RDWR|O_CREAT, %o) failed", TESTFILE,
183 FILE_MODE);
184
185 if (seteuid(0) == -1)
186 tst_brkm(TBROK | TERRNO, cleanup, "seteuid(0) failed");
187
188 if (fchown(fd, -1, 0) < 0)
189 tst_brkm(TBROK | TERRNO, cleanup, "fchown failed");
190
191 if (fchmod(fd, NEW_PERMS) < 0)
192 tst_brkm(TBROK | TERRNO, cleanup, "fchmod failed");
193
194 if (seteuid(ltpuser->pw_uid) == -1)
195 tst_brkm(TBROK | TERRNO, cleanup, "seteuid to nobody failed");
196
197 if (close(fd) == -1)
198 tst_brkm(TBROK | TERRNO, cleanup, "closing %s failed",
199 TESTFILE);
200 }
201
cleanup(void)202 void cleanup(void)
203 {
204 if (setegid(0) == -1)
205 tst_resm(TWARN | TERRNO, "setegid(0) failed");
206 if (seteuid(0) == -1)
207 tst_resm(TWARN | TERRNO, "seteuid(0) failed");
208
209 tst_rmdir();
210
211 }
212