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 * NAME
22 * setresuid01.c
23 *
24 * DESCRIPTION
25 * Test setresuid() when executed by root.
26 *
27 * ALGORITHM
28 *
29 * Setup:
30 * Setup signal handling
31 * Get user information.
32 * Pause for SIGUSER1 if option specified.
33 * Setup test values.
34 * Loop if the proper options are given.
35 * For each test execute the system call
36 * Check return code, if system call failed (return=-1)
37 * Log the errno and Issue a FAIL message.
38 * Otherwise,
39 * Verify the Functionality of system call
40 * if successful,
41 * Issue Functionality-Pass message.
42 * Otherwise,
43 * Issue Functionality-Fail message.
44 * Cleanup:
45 * Print errno log and/or timing stats if options given.
46 *
47 * USAGE: <for command-line>
48 * setresuid01 [-c n] [-e] [-f] [-i n] [-I x] [-P x] [-t]
49 * where, -c n : Run n copies concurrently.
50 * -e : Turn on errno logging.
51 * -f : Turn off functionality Testing.
52 * -i n : Execute test n times.
53 * -I x : Execute test for x seconds.
54 * -P x : Pause for x seconds between iterations.
55 * -t : Turn on syscall timing.
56 * History
57 * 07/2001 John George
58 * -Ported
59 *
60 * Restrictions
61 * This test must be ran as root.
62 * nobody and bin must be valid users.
63 */
64
65 #define _GNU_SOURCE 1
66 #include <pwd.h>
67 #include <stdlib.h>
68 #include <string.h>
69 #include "test.h"
70 #include <errno.h>
71 #include "compat_16.h"
72
73 TCID_DEFINE(setresuid01);
74
75 uid_t nobody_pw_uid, root_pw_uid, bin_pw_uid;
76 uid_t neg_one = -1;
77
78 struct passwd nobody, bin, root;
79
80 /*
81 * The following structure contains all test data. Each structure in the array
82 * is used for a separate test. The tests are executed in the for loop below.
83 */
84
85 struct test_data_t {
86 uid_t *real_uid;
87 uid_t *eff_uid;
88 uid_t *sav_uid;
89 struct passwd *exp_real_usr;
90 struct passwd *exp_eff_usr;
91 struct passwd *exp_sav_usr;
92 char *test_msg;
93 } test_data[] = {
94 {
95 &neg_one, &neg_one, &neg_one, &root, &root, &root,
96 "After setresuid(-1, -1, -1),"}, {
97 &neg_one, &neg_one, &nobody_pw_uid, &root, &root, &nobody,
98 "After setresuid(-1, -1, nobody),"}, {
99 &neg_one, &bin_pw_uid, &neg_one, &root, &bin, &nobody,
100 "After setresuid(-1, bin, -1),"}, {
101 &neg_one, &neg_one, &root_pw_uid, &root, &bin, &root,
102 "After setresuid(-1, -1, root),"}, {
103 &neg_one, &neg_one, &bin_pw_uid, &root, &bin, &bin,
104 "After setresuid(-1, -1, bin),"}, {
105 &neg_one, &root_pw_uid, &neg_one, &root, &root, &bin,
106 "After setresuid(-1, root, -1),"}, {
107 &nobody_pw_uid, &neg_one, &neg_one, &nobody, &root, &bin,
108 "After setresuid(nobody, -1, -1)"}, {
109 &neg_one, &root_pw_uid, &neg_one, &nobody, &root, &bin,
110 "After setresuid(-1, root, -1),"}, {
111 &root_pw_uid, &neg_one, &root_pw_uid, &root, &root, &root,
112 "After setresuid(root, -1, -1),"},};
113
114 int TST_TOTAL = sizeof(test_data) / sizeof(test_data[0]);
115
116 void setup(void);
117 void cleanup(void);
118
119 void
120 uid_verify(struct passwd *ru, struct passwd *eu, struct passwd *su, char *when);
121
main(int ac,char ** av)122 int main(int ac, char **av)
123 {
124 int lc;
125
126 tst_parse_opts(ac, av, NULL, NULL);
127
128 setup();
129
130 for (lc = 0; TEST_LOOPING(lc); lc++) {
131 int i;
132
133 /* reset tst_count in case we are looping */
134 tst_count = 0;
135
136 for (i = 0; i < TST_TOTAL; i++) {
137 /* Set the real, effective or user id */
138 TEST(SETRESUID(cleanup, *test_data[i].real_uid,
139 *test_data[i].eff_uid,
140 *test_data[i].sav_uid));
141
142 if (TEST_RETURN == -1) {
143 tst_resm(TFAIL, "setresuid(%d, %d, %d) failed",
144 *test_data[i].real_uid,
145 *test_data[i].eff_uid,
146 *test_data[i].sav_uid);
147 } else {
148 uid_verify(test_data[i].exp_real_usr,
149 test_data[i].exp_eff_usr,
150 test_data[i].exp_sav_usr,
151 test_data[i].test_msg);
152 }
153 }
154 }
155
156 cleanup();
157 tst_exit();
158 }
159
160 /*
161 * setup()
162 * performs all ONE TIME setup for this test
163 */
setup(void)164 void setup(void)
165 {
166 tst_require_root();
167
168 tst_sig(FORK, DEF_HANDLER, cleanup);
169
170 if (getpwnam("nobody") == NULL) {
171 tst_brkm(TBROK, NULL, "nobody must be a valid user.");
172 }
173
174 if (getpwnam("bin") == NULL) {
175 tst_brkm(TBROK, NULL, "bin must be a valid user.");
176 }
177
178 root = *(getpwnam("root"));
179 UID16_CHECK((root_pw_uid = root.pw_uid), "setresuid", cleanup)
180
181 nobody = *(getpwnam("nobody"));
182 UID16_CHECK((nobody_pw_uid = nobody.pw_uid), "setresuid", cleanup)
183
184 bin = *(getpwnam("bin"));
185 UID16_CHECK((bin_pw_uid = bin.pw_uid), "setresuid", cleanup)
186
187 /* Pause if that option was specified
188 * TEST_PAUSE contains the code to fork the test with the -c option.
189 */
190 TEST_PAUSE;
191 }
192
193 /*
194 * cleanup()
195 * performs all ONE TIME cleanup for this test at
196 * completion or premature exit
197 */
cleanup(void)198 void cleanup(void)
199 {
200
201 }
202
203 void
uid_verify(struct passwd * ru,struct passwd * eu,struct passwd * su,char * when)204 uid_verify(struct passwd *ru, struct passwd *eu, struct passwd *su, char *when)
205 {
206 uid_t cur_ru, cur_eu, cur_su;
207 if (getresuid(&cur_ru, &cur_eu, &cur_su) != 0) {
208 tst_brkm(TBROK, cleanup, "Set getresuid() failed");
209 }
210 if ((cur_ru != ru->pw_uid) || (cur_eu != eu->pw_uid) || (cur_su !=
211 su->pw_uid)) {
212 tst_resm(TFAIL, "ERROR: %s real uid = %d; effective uid = %d; "
213 "saved uid = %d", when, cur_ru, cur_eu, cur_su);
214 tst_resm(TINFO, "Expected: real uid = %d, effective uid = %d "
215 "saved uid = %d", ru->pw_uid, eu->pw_uid, su->pw_uid);
216 } else {
217 tst_resm(TPASS,
218 "real uid = %d, effective uid = %d, and saved uid = "
219 "%d as expected", cur_ru, cur_eu, cur_su);
220 }
221 }
222