1 /*
2 * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15 *
16 */
17 /**********************************************************
18 *
19 * TEST IDENTIFIER : setdomainname03
20 *
21 * EXECUTED BY : root / superuser
22 *
23 * TEST TITLE : test for EPERM error value when run as non superuser
24 *
25 * TEST CASE TOTAL : 1
26 *
27 * AUTHOR : Saji Kumar.V.R <saji.kumar@wipro.com>
28 *
29 * SIGNALS
30 * Uses SIGUSR1 to pause before test if option set.
31 * (See the parse_opts(3) man page).
32 *
33 * DESCRIPTION
34 * Verify that, setdomainname(2) returns -1 and sets errno to EPERM
35 * if the effective user id of the caller is not super-user.
36 *
37 * Algorithm:
38 * Setup:
39 * Setup signal handling.
40 * Pause for SIGUSR1 if option specified.
41 * save current domainname
42 * change effective user id to "nobody" user
43 *
44 * Test:
45 * Loop if the proper options are given.
46 * Execute system call
47 * Check return code, Check return code, if (system call failed (return=-1)) &
48 * (errno set == expected errno)
49 * Issue sys call fails with expected return value and errno.
50 * Otherwise,
51 * Issue sys call fails with unexpected errno.
52 * Otherwise,
53 * Issue sys call returns unexpected value.
54 *
55 * Cleanup:
56 * Change effective user id to root
57 * Restore old domainname
58 * Print errno log and/or timing stats if options given
59 *
60 * Usage: <for command-line>
61 * setdomainname03 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p]
62 * where, -c n : Run n copies concurrently.
63 * -e : Turn on errno logging.
64 * -h : Show help screen
65 * -f : Turn off functional testing
66 * -i n : Execute test n times.
67 * -I x : Execute test for x seconds.
68 * -p : Pause for SIGUSR1 before starting
69 * -P x : Pause for x seconds between iterations.
70 * -t : Turn on syscall timing.
71 *
72 ****************************************************************/
73
74 #include <string.h>
75 #include <errno.h>
76 #include <pwd.h>
77 #include <linux/utsname.h>
78
79 #include "test.h"
80
81 #define MAX_NAME_LEN __NEW_UTS_LEN
82
83 char *TCID = "setdomainname03";
84 int TST_TOTAL = 1;
85
86 static char nobody_uid[] = "nobody";
87 struct passwd *ltpuser;
88
89 static char test_domain_name[MAX_NAME_LEN] = "test_dom";
90 static char old_domain_name[MAX_NAME_LEN];
91
92 static void setup(); /* setup function for the tests */
93 static void cleanup(); /* cleanup function for the tests */
94
main(int ac,char ** av)95 int main(int ac, char **av)
96 {
97 int lc;
98
99 tst_parse_opts(ac, av, NULL, NULL);
100
101 /*
102 * Invoke setup function to call individual test setup functions
103 * for the test which run as root/super-user.
104 */
105 setup();
106
107 for (lc = 0; TEST_LOOPING(lc); lc++) {
108
109 tst_count = 0;
110
111 /*
112 * Call setdomainname(2)
113 */
114 TEST(setdomainname(test_domain_name, MAX_NAME_LEN));
115 if ((TEST_RETURN == -1) && (TEST_ERRNO == EPERM)) {
116 tst_resm(TPASS, "expected failure; Got EPERM");
117 } else {
118 tst_resm(TFAIL, "Call failed to produce "
119 "expected error; Expected errno: %d "
120 "Got : %d, %s", EPERM, TEST_ERRNO,
121 strerror(TEST_ERRNO));
122 }
123
124 }
125
126 /*
127 * Invoke cleanup() to delete the test directories created
128 * in the setup().
129 */
130 cleanup();
131 tst_exit();
132
133 }
134
135 /*
136 * setup(void) - performs all ONE TIME setup for this test.
137 */
setup(void)138 void setup(void)
139 {
140 tst_require_root();
141
142 /* Capture unexpected signals */
143 tst_sig(NOFORK, DEF_HANDLER, cleanup);
144
145 /* Switch to nobody user for correct error code collection */
146 if ((ltpuser = getpwnam(nobody_uid)) == NULL) {
147 tst_brkm(TBROK, NULL, "\"nobody\" user not present");
148 }
149 if (seteuid(ltpuser->pw_uid) == -1) {
150 tst_resm(TWARN, "seteuid failed to "
151 "to set the effective uid to %d", ltpuser->pw_uid);
152 perror("seteuid");
153 }
154
155 /* Save current domainname */
156 if ((getdomainname(old_domain_name, MAX_NAME_LEN)) < 0) {
157 tst_brkm(TBROK, NULL, "getdomainname() failed while"
158 " getting current domain name");
159 }
160
161 TEST_PAUSE;
162
163 }
164
165 /*
166 * cleanup() - Performs all ONE TIME cleanup for this test at
167 */
cleanup(void)168 void cleanup(void)
169 {
170
171 /* Set effective user id back to root */
172 if (seteuid(0) == -1) {
173 tst_resm(TWARN, "seteuid failed to "
174 "to set the effective uid to root");
175 perror("seteuid");
176 }
177
178 /* Restore domain name */
179 if ((setdomainname(old_domain_name, strlen(old_domain_name)))
180 < 0) {
181 tst_resm(TWARN, "setdomainname() failed while restoring"
182 " domainname to \"%s\"", old_domain_name);
183 }
184
185 }
186