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 <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 "safe_macros.h"
85 #include "compat_16.h"
86
87 #define FILE_MODE (S_IFREG|S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
88 #define NEW_PERMS (S_IFREG|S_IRWXU|S_IRWXG|S_ISUID|S_ISGID)
89 #define TESTFILE "testfile"
90
91 TCID_DEFINE(chown03);
92 int TST_TOTAL = 1; /* Total number of test conditions */
93 char nobody_uid[] = "nobody";
94 struct passwd *ltpuser;
95
96 void setup(); /* setup function for the test */
97 void cleanup(); /* cleanup function for the test */
98
main(int ac,char ** av)99 int main(int ac, char **av)
100 {
101 struct stat stat_buf; /* stat(2) struct contents */
102 int lc;
103 uid_t user_id; /* Owner id of the test file. */
104 gid_t group_id; /* Group id of the test file. */
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 UID16_CHECK((user_id = geteuid()), "chown", cleanup)
115 GID16_CHECK((group_id = getegid()), "chown", cleanup)
116
117 TEST(CHOWN(cleanup, TESTFILE, -1, group_id));
118
119 if (TEST_RETURN == -1) {
120 tst_resm(TFAIL | TTERRNO, "chown(%s, ..) failed",
121 TESTFILE);
122 continue;
123 }
124
125 if (stat(TESTFILE, &stat_buf) == -1)
126 tst_brkm(TFAIL | TERRNO, cleanup,
127 "stat failed");
128
129 if (stat_buf.st_uid != user_id ||
130 stat_buf.st_gid != group_id)
131 tst_resm(TFAIL, "%s: Incorrect ownership"
132 "set to %d %d, Expected %d %d",
133 TESTFILE, stat_buf.st_uid,
134 stat_buf.st_gid, user_id, group_id);
135
136 if (stat_buf.st_mode !=
137 (NEW_PERMS & ~(S_ISUID | S_ISGID)))
138 tst_resm(TFAIL, "%s: incorrect mode permissions"
139 " %#o, Expected %#o", TESTFILE,
140 stat_buf.st_mode,
141 NEW_PERMS & ~(S_ISUID | S_ISGID));
142 else
143 tst_resm(TPASS, "chown(%s, ..) was successful",
144 TESTFILE);
145 }
146
147 cleanup();
148 tst_exit();
149 }
150
151 /*
152 * void
153 * setup() - performs all ONE TIME setup for this test.
154 * Create a temporary directory and change directory to it.
155 * Create a test file under temporary directory and close it
156 * Change the group ownership on testfile.
157 */
setup(void)158 void setup(void)
159 {
160 int fd; /* file handler for testfile */
161
162 TEST_PAUSE;
163
164 tst_require_root();
165
166 tst_sig(FORK, DEF_HANDLER, cleanup);
167
168 tst_tmpdir();
169
170 ltpuser = getpwnam(nobody_uid);
171 if (ltpuser == NULL)
172 tst_brkm(TBROK | TERRNO, NULL, "getpwnam(\"nobody\") failed");
173 SAFE_SETEGID(NULL, ltpuser->pw_gid);
174 SAFE_SETEUID(NULL, ltpuser->pw_uid);
175
176 /* Create a test file under temporary directory */
177 if ((fd = open(TESTFILE, O_RDWR | O_CREAT, FILE_MODE)) == -1)
178 tst_brkm(TBROK | TERRNO, cleanup,
179 "open(%s, O_RDWR|O_CREAT, %o) failed", TESTFILE,
180 FILE_MODE);
181
182 SAFE_SETEUID(cleanup, 0);
183
184 SAFE_FCHOWN(cleanup, fd, -1, 0);
185
186 SAFE_FCHMOD(cleanup, fd, NEW_PERMS);
187
188 SAFE_SETEUID(cleanup, ltpuser->pw_uid);
189
190 SAFE_CLOSE(cleanup, fd);
191 }
192
cleanup(void)193 void cleanup(void)
194 {
195 if (setegid(0) == -1)
196 tst_resm(TWARN | TERRNO, "setegid(0) failed");
197 if (seteuid(0) == -1)
198 tst_resm(TWARN | TERRNO, "seteuid(0) failed");
199
200 tst_rmdir();
201
202 }
203