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 * Ported by John George
20 */
21
22 /*
23 * Test setreuid() when executed by an unpriviledged user.
24 */
25
26 #include <errno.h>
27 #include <pwd.h>
28 #include <stdlib.h>
29
30 #include "test.h"
31 #include "compat_16.h"
32
33 #define FAILED 1
34
35 TCID_DEFINE(setreuid03);
36
37 static int fail = -1;
38 static int pass;
39 static uid_t neg_one = -1;
40
41 static struct passwd nobody, bin, root;
42
43 /*
44 * The following structure contains all test data. Each structure in the array
45 * is used for a separate test. The tests are executed in the for loop below.
46 */
47
48 static struct test_data_t {
49 uid_t *real_uid;
50 uid_t *eff_uid;
51 int *exp_ret;
52 struct passwd *exp_real_usr;
53 struct passwd *exp_eff_usr;
54 char *test_msg;
55 } test_data[] = {
56 {
57 &nobody.pw_uid, &nobody.pw_uid, &pass, &nobody, &nobody,
58 "After setreuid(nobody, nobody),"}, {
59 &neg_one, &nobody.pw_uid, &pass, &nobody, &nobody,
60 "After setreuid(-1, nobody),"}, {
61 &nobody.pw_uid, &neg_one, &pass, &nobody, &nobody,
62 "After setreuid(nobody, -1),"}, {
63 &neg_one, &neg_one, &pass, &nobody, &nobody, "After setreuid(-1, -1),"},
64 {
65 &neg_one, &root.pw_uid, &fail, &nobody, &nobody,
66 "After setreuid(-1, root),"}, {
67 &root.pw_uid, &neg_one, &fail, &nobody, &nobody,
68 "After setreuid(root, -1),"}, {
69 &root.pw_uid, &root.pw_uid, &fail, &nobody, &nobody,
70 "After setreuid(root, root),"}, {
71 &root.pw_uid, &nobody.pw_uid, &fail, &nobody, &nobody,
72 "After setreuid(root, nobody),"}, {
73 &root.pw_uid, &bin.pw_uid, &fail, &nobody, &nobody,
74 "After setreuid(root, nobody),"}, {
75 &bin.pw_uid, &root.pw_uid, &fail, &nobody, &nobody,
76 "After setreuid(bin, root),"}, {
77 &bin.pw_uid, &neg_one, &fail, &nobody, &nobody,
78 "After setreuid(bin, -1),"}, {
79 &bin.pw_uid, &bin.pw_uid, &fail, &nobody, &nobody,
80 "After setreuid(bin, bin,),"}, {
81 &bin.pw_uid, &nobody.pw_uid, &fail, &nobody, &nobody,
82 "After setreuid(bin, nobody),"}, {
83 &nobody.pw_uid, &bin.pw_uid, &fail, &nobody, &nobody,
84 "After setreuid(nobody, bin),"},};
85
86 int TST_TOTAL = ARRAY_SIZE(test_data);
87
88 static void setup(void);
89 static void cleanup(void);
90 static void uid_verify(struct passwd *, struct passwd *, char *);
91
main(int ac,char ** av)92 int main(int ac, char **av)
93 {
94 int lc;
95
96 tst_parse_opts(ac, av, NULL, NULL);
97
98 setup();
99
100 for (lc = 0; TEST_LOOPING(lc); lc++) {
101 int i;
102
103 tst_count = 0;
104
105 for (i = 0; i < TST_TOTAL; i++) {
106
107 /* Set the real or effective user id */
108 TEST(SETREUID(cleanup, *test_data[i].real_uid,
109 *test_data[i].eff_uid));
110
111 if (TEST_RETURN == *test_data[i].exp_ret) {
112 if (TEST_RETURN == neg_one) {
113 if (TEST_ERRNO != EPERM) {
114 tst_resm(TFAIL,
115 "setreuid(%d, %d) "
116 "did not set errno "
117 "value as expected.",
118 *test_data[i].real_uid,
119 *test_data[i].eff_uid);
120 continue;
121 }
122 tst_resm(TPASS, "setreuid(%d, %d) "
123 "failed as expected.",
124 *test_data[i].real_uid,
125 *test_data[i].eff_uid);
126 } else {
127 tst_resm(TPASS, "setreuid(%d, %d) "
128 "succeeded as expected.",
129 *test_data[i].real_uid,
130 *test_data[i].eff_uid);
131 }
132 } else {
133 tst_resm(TFAIL, "setreuid(%d, %d) "
134 "did not return as expected.",
135 *test_data[i].real_uid,
136 *test_data[i].eff_uid);
137 }
138
139 if (TEST_RETURN == -1) {
140 }
141 uid_verify(test_data[i].exp_real_usr,
142 test_data[i].exp_eff_usr,
143 test_data[i].test_msg);
144 }
145 }
146
147 cleanup();
148 tst_exit();
149 }
150
setup(void)151 static void setup(void)
152 {
153 tst_require_root();
154
155 tst_sig(FORK, DEF_HANDLER, cleanup);
156
157 if (getpwnam("nobody") == NULL)
158 tst_brkm(TBROK, NULL, "nobody must be a valid user.");
159
160 if (getpwnam("bin") == NULL)
161 tst_brkm(TBROK, NULL, "bin must be a valid user.");
162
163 root = *(getpwnam("root"));
164 UID16_CHECK(root.pw_uid, setreuid, cleanup);
165
166 nobody = *(getpwnam("nobody"));
167 UID16_CHECK(nobody.pw_uid, setreuid, cleanup);
168
169 bin = *(getpwnam("bin"));
170 UID16_CHECK(bin.pw_uid, setreuid, cleanup);
171
172 if (setuid(nobody.pw_uid) < 0)
173 tst_brkm(TBROK | TERRNO, NULL, "setuid() to nobody failed");
174
175 TEST_PAUSE;
176 }
177
cleanup(void)178 static void cleanup(void)
179 {
180 }
181
uid_verify(struct passwd * ru,struct passwd * eu,char * when)182 static void uid_verify(struct passwd *ru, struct passwd *eu, char *when)
183 {
184 if ((getuid() != ru->pw_uid) || (geteuid() != eu->pw_uid)) {
185 tst_resm(TFAIL, "ERROR: %s real uid = %d; effective uid = %d",
186 when, getuid(), geteuid());
187 tst_resm(TINFO, "Expected: real uid = %d; effective uid = %d",
188 ru->pw_uid, eu->pw_uid);
189 }
190 }
191