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
76static void setup();
77static void cleanup();
78
79char *TCID = "sethostname01";
80int TST_TOTAL = 1;
81static char hname[MAX_LENGTH];	/* host name */
82
83int 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 */
123void 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 */
145void 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