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 * Ported by John George
19 */
20
21 /*
22 * Test the setreuid() feature, verifying the role of the saved-set-uid
23 * and setreuid's effect on it.
24 */
25
26 #include <errno.h>
27 #include <pwd.h>
28 #include <stdlib.h>
29 #include <sys/wait.h>
30
31 #include "test.h"
32 #include "compat_16.h"
33
34 TCID_DEFINE(setreuid05);
35
36 static int fail = -1;
37 static int pass;
38 static uid_t neg_one = -1;
39
40 static struct passwd nobody, daemonpw, root, bin;
41
42 struct test_data_t {
43 uid_t *real_uid;
44 uid_t *eff_uid;
45 int *exp_ret;
46 struct passwd *exp_real_usr;
47 struct passwd *exp_eff_usr;
48 char *test_msg;
49 } test_data[] = {
50 {
51 &nobody.pw_uid, &root.pw_uid, &pass, &nobody, &root, "Initially"}, {
52 &neg_one, &nobody.pw_uid, &pass, &nobody, &nobody,
53 "After setreuid(-1, nobody),"}, {
54 &neg_one, &root.pw_uid, &pass, &nobody, &root,
55 "After setreuid(-1, root),"}, {
56 &daemonpw.pw_uid, &neg_one, &pass, &daemonpw, &root,
57 "After setreuid(daemon, -1),"}, {
58 &neg_one, &bin.pw_uid, &pass, &daemonpw, &bin,
59 "After setreuid(-1, bin),"}, {
60 &neg_one, &root.pw_uid, &fail, &daemonpw, &bin,
61 "After setreuid(-1, root),"}, {
62 &neg_one, &nobody.pw_uid, &fail, &daemonpw, &bin,
63 "After setreuid(-1, nobody),"}, {
64 &neg_one, &daemonpw.pw_uid, &pass, &daemonpw, &daemonpw,
65 "After setreuid(-1, daemon),"}, {
66 &neg_one, &bin.pw_uid, &pass, &daemonpw, &bin,
67 "After setreuid(-1, bin),"}, {
68 &bin.pw_uid, &daemonpw.pw_uid, &pass, &bin, &daemonpw,
69 "After setreuid(bin, daemon),"}, {
70 &neg_one, &bin.pw_uid, &pass, &bin, &bin, "After setreuid(-1, bin),"},
71 {
72 &neg_one, &daemonpw.pw_uid, &pass, &bin, &daemonpw,
73 "After setreuid(-1, daemon),"}, {
74 &daemonpw.pw_uid, &neg_one, &pass, &daemonpw, &daemonpw,
75 "After setreuid(daemon, -1),"}, {
76 &neg_one, &bin.pw_uid, &fail, &daemonpw, &daemonpw,
77 "After setreuid(-1, bin),"},};
78
79 int TST_TOTAL = ARRAY_SIZE(test_data);
80
81 static void setup(void);
82 static void cleanup(void);
83 static void uid_verify(struct passwd *, struct passwd *, char *);
84
main(int argc,char ** argv)85 int main(int argc, char **argv)
86 {
87 int lc;
88
89 tst_parse_opts(argc, argv, NULL, NULL);
90
91 setup();
92
93 pass = 0;
94
95 for (lc = 0; TEST_LOOPING(lc); lc++) {
96 int i, pid;
97
98 tst_count = 0;
99
100 if ((pid = FORK_OR_VFORK()) == -1) {
101 tst_brkm(TBROK, cleanup, "fork failed");
102 } else if (pid == 0) { /* child */
103 for (i = 0; i < TST_TOTAL; i++) {
104 /* Set the real or effective user id */
105 TEST(SETREUID(cleanup, *test_data[i].real_uid,
106 *test_data[i].eff_uid));
107
108 if (TEST_RETURN == *test_data[i].exp_ret) {
109 if (TEST_RETURN == neg_one) {
110 if (TEST_ERRNO != EPERM) {
111 tst_resm(TFAIL,
112 "setreuid(%d, %d) "
113 "did not set errno "
114 "value as expected.",
115 *test_data
116 [i].real_uid,
117 *test_data
118 [i].eff_uid);
119 continue;
120 }
121 tst_resm(TPASS,
122 "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,
128 "setreuid(%d, %d) "
129 "succeeded as expected.",
130 *test_data[i].real_uid,
131 *test_data[i].eff_uid);
132 }
133 } else {
134 tst_resm(TFAIL, "setreuid(%d, %d) "
135 "did not return as expected.",
136 *test_data[i].real_uid,
137 *test_data[i].eff_uid);
138 }
139
140 if (TEST_RETURN == -1) {
141 }
142 uid_verify(test_data[i].exp_real_usr,
143 test_data[i].exp_eff_usr,
144 test_data[i].test_msg);
145 }
146 tst_exit();
147 } else { /* parent */
148 tst_record_childstatus(cleanup, pid);
149 }
150 }
151 cleanup();
152 tst_exit();
153 }
154
setup(void)155 static void setup(void)
156 {
157 tst_require_root();
158
159 tst_sig(FORK, DEF_HANDLER, cleanup);
160
161 if (getpwnam("nobody") == NULL)
162 tst_brkm(TBROK, NULL, "nobody must be a valid user.");
163
164 if (getpwnam("daemon") == NULL)
165 tst_brkm(TBROK, NULL, "daemon must be a valid user.");
166
167 if (getpwnam("bin") == NULL)
168 tst_brkm(TBROK, NULL, "bin must be a valid user.");
169
170 nobody = *(getpwnam("nobody"));
171 UID16_CHECK(nobody.pw_uid, setreuid, cleanup);
172
173 daemonpw = *(getpwnam("daemon"));
174 UID16_CHECK(daemonpw.pw_uid, setreuid, cleanup);
175
176 root = *(getpwnam("root"));
177 UID16_CHECK(root.pw_uid, setreuid, cleanup);
178
179 bin = *(getpwnam("bin"));
180 UID16_CHECK(bin.pw_uid, setreuid, cleanup);
181
182 TEST_PAUSE;
183 }
184
cleanup(void)185 static void cleanup(void)
186 {
187 }
188
uid_verify(struct passwd * ru,struct passwd * eu,char * when)189 static void uid_verify(struct passwd *ru, struct passwd *eu, char *when)
190 {
191 if ((getuid() != ru->pw_uid) || (geteuid() != eu->pw_uid)) {
192 tst_resm(TFAIL, "ERROR: %s real uid = %d; effective uid = %d",
193 when, getuid(), geteuid());
194 tst_resm(TINFO, "Expected: real uid = %d; effective uid = %d",
195 ru->pw_uid, eu->pw_uid);
196 }
197 }
198