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 setreuid() when executed by root.
23 */
24
25 #include <errno.h>
26 #include <pwd.h>
27 #include <stdlib.h>
28 #include <string.h>
29
30 #include "test.h"
31 #include "compat_16.h"
32
33 TCID_DEFINE(setreuid02);
34
35 static uid_t neg_one = -1;
36 static struct passwd nobody, daemonpw, root, bin;
37
38 /*
39 * The following structure contains all test data. Each structure in the array
40 * is used for a separate test. The tests are executed in the for loop below.
41 */
42
43 static struct test_data_t {
44 uid_t *real_uid;
45 uid_t *eff_uid;
46 struct passwd *exp_real_usr;
47 struct passwd *exp_eff_usr;
48 char *test_msg;
49 } test_data[] = {
50 {
51 &neg_one, &neg_one, &root, &root, "After setreuid(-1, -1),"}, {
52 &nobody.pw_uid, &neg_one, &nobody, &root, "After setreuid(nobody, -1)"},
53 {
54 &root.pw_uid, &neg_one, &root, &root, "After setreuid(root,-1),"}, {
55 &neg_one, &daemonpw.pw_uid, &root, &daemonpw,
56 "After setreuid(-1, daemon)"}, {
57 &neg_one, &root.pw_uid, &root, &root, "After setreuid(-1,root),"}, {
58 &bin.pw_uid, &neg_one, &bin, &root, "After setreuid(bin, -1)"}, {
59 &root.pw_uid, &neg_one, &root, &root, "After setreuid(-1, root)"},};
60
61 int TST_TOTAL = ARRAY_SIZE(test_data);
62
63 static void setup(void);
64 static void cleanup(void);
65 static void uid_verify(struct passwd *ru, struct passwd *eu, char *when);
66
main(int ac,char ** av)67 int main(int ac, char **av)
68 {
69 int lc;
70
71 tst_parse_opts(ac, av, NULL, NULL);
72
73 setup();
74
75 for (lc = 0; TEST_LOOPING(lc); lc++) {
76 int i;
77
78 tst_count = 0;
79
80 for (i = 0; i < TST_TOTAL; i++) {
81 /* Set the real or effective user id */
82 TEST(SETREUID(cleanup, *test_data[i].real_uid,
83 *test_data[i].eff_uid));
84
85 if (TEST_RETURN == -1) {
86 tst_resm(TBROK, "setreuid(%d, %d) failed",
87 *test_data[i].real_uid,
88 *test_data[i].eff_uid);
89 } else {
90 uid_verify(test_data[i].exp_real_usr,
91 test_data[i].exp_eff_usr,
92 test_data[i].test_msg);
93 }
94 }
95 }
96 cleanup();
97 tst_exit();
98 }
99
setup(void)100 static void setup(void)
101 {
102 tst_require_root();
103
104 tst_sig(FORK, DEF_HANDLER, cleanup);
105
106 if (getpwnam("nobody") == NULL)
107 tst_brkm(TBROK, NULL, "nobody must be a valid user.");
108
109 if (getpwnam("daemon") == NULL)
110 tst_brkm(TBROK, NULL, "daemon must be a valid user.");
111
112 if (getpwnam("bin") == NULL)
113 tst_brkm(TBROK, NULL, "bin must be a valid user.");
114
115 root = *(getpwnam("root"));
116 UID16_CHECK(root.pw_uid, setreuid, cleanup);
117
118 nobody = *(getpwnam("nobody"));
119 UID16_CHECK(nobody.pw_uid, setreuid, cleanup);
120
121 daemonpw = *(getpwnam("daemon"));
122 UID16_CHECK(daemonpw.pw_uid, setreuid, cleanup);
123
124 bin = *(getpwnam("bin"));
125 UID16_CHECK(bin.pw_uid, setreuid, cleanup);
126
127 TEST_PAUSE;
128 }
129
cleanup(void)130 static void cleanup(void)
131 {
132 }
133
uid_verify(struct passwd * ru,struct passwd * eu,char * when)134 static void uid_verify(struct passwd *ru, struct passwd *eu, char *when)
135 {
136 if ((getuid() != ru->pw_uid) || (geteuid() != eu->pw_uid)) {
137 tst_resm(TFAIL, "ERROR: %s real uid = %d; effective uid = %d",
138 when, getuid(), geteuid());
139 tst_resm(TFAIL, "Expected: real uid = %d; effective uid = %d",
140 ru->pw_uid, eu->pw_uid);
141 } else {
142 tst_resm(TPASS, "real or effective uid was modified as "
143 "expected");
144 }
145 }
146