1 /*
2 *
3 * Copyright (c) Wipro Technologies, 2002. All Rights Reserved.
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 /*********************************************************************
22 * TEST IDENTIFIER : sethostname01
23 *
24 * EXECUTED BY : root / superuser
25 *
26 * TEST TITLE : Basic test for sethostname(2)
27 *
28 * TEST CASE TOTAL : 1
29 *
30 * AUTHOR : Suresh Babu V. <suresh.babu@wipro.com>
31 *
32 * SIGNALS
33 * Uses SIGUSR1 to pause before test if option set.
34 * (See the parse_opts(3) man page).
35 *
36 * DESCRIPTION$
37 * This is a Phase I test for the sethostname(2) system call.
38 * It is intended to provide a limited exposure of the system call.
39 *
40 * Setup:
41 * Setup signal handling.
42 * Save the current hostname.
43 * Pause for SIGUSR1 if option specified.
44 *
45 * Test:
46 * Loop if the proper options are given.
47 * Execute system call
48 * Check return code, if system call failed (return=-1)
49 * Log the errno and Issue a FAIL message.
50 * Otherwise, Issue a PASS message.
51 * Cleanup:
52 * Restore old host name.
53 * Print errno log and/or timing stats if options given
54 *
55 * Usage: <for command-line>
56 * sethostname01 [-c n] [-i n] [-I x] [-P x] [-p] [-t] [-h]
57 * where, -c n : Run n copies concurrently.
58 * -i n : Execute test n times.
59 * -I x : Execute test for x seconds.
60 * -p : Pause for SIGUSR1 before starting
61 * -P x : Pause for x seconds between iterations.
62 * -t : Turn on syscall timing.
63 * -h : Display usage information
64 *
65 *
66 ******************************************************************/
67
68 #include <string.h>
69 #include <errno.h>
70 #include <linux/utsname.h>
71
72 #include "test.h"
73
74 #define MAX_LENGTH __NEW_UTS_LEN
75
76 static void setup();
77 static void cleanup();
78
79 char *TCID = "sethostname01";
80 int TST_TOTAL = 1;
81 static char hname[MAX_LENGTH]; /* host name */
82
main(int ac,char ** av)83 int main(int ac, char **av)
84 {
85 int lc;
86
87 char ltphost[] = "ltphost"; /* temporary host name to set */
88
89 tst_parse_opts(ac, av, NULL, NULL);
90
91 /* Do initial setup. */
92 setup();
93
94 /* check -c option for looping. */
95 for (lc = 0; TEST_LOOPING(lc); lc++) {
96
97 tst_count = 0;
98
99 /* Call sethostname(2) */
100 TEST(sethostname(ltphost, sizeof(ltphost)));
101
102 /* check return code */
103 if (TEST_RETURN == -1) {
104 tst_resm(TFAIL, "sethostname() failed , errno=%d : %s",
105 TEST_ERRNO, strerror(TEST_ERRNO));
106 } else {
107 tst_resm(TPASS, "sethostname() returned %ld,"
108 " Hostname set to \"%s\"", TEST_RETURN,
109 ltphost);
110 }
111
112 }
113
114 /* cleanup and exit */
115 cleanup();
116 tst_exit();
117
118 }
119
120 /*
121 * setup() - performs all one time setup for this test.
122 */
setup(void)123 void setup(void)
124 {
125 int ret;
126
127 tst_require_root();
128
129 tst_sig(NOFORK, DEF_HANDLER, cleanup);
130
131 /* Store the existing hostname to retain it before exiting */
132 if ((ret = gethostname(hname, sizeof(hname))) < 0) {
133 tst_brkm(TBROK, NULL, "gethostname() failed while getting"
134 " current host name");
135 }
136
137 TEST_PAUSE;
138
139 }
140
141 /*
142 * cleanup() - performs all one time cleanup for this test
143 * completion or premature exit.
144 */
cleanup(void)145 void cleanup(void)
146 {
147 int ret;
148
149 /* Set the host name back to original name */
150 if ((ret = sethostname(hname, strlen(hname))) < 0) {
151 tst_resm(TWARN, "sethostname() failed while restoring"
152 " hostname to \"%s\": %s", hname, strerror(errno));
153 }
154
155 }
156