t_setdomainname.c revision 321878 
1/* $NetBSD: t_setdomainname.c,v 1.2 2012/03/25 08:17:54 joerg Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31#include <sys/cdefs.h>
32__RCSID("$NetBSD: t_setdomainname.c,v 1.2 2012/03/25 08:17:54 joerg Exp $");
33
34#include <sys/param.h>
35
36#include <atf-c.h>
37#include <err.h>
38#include <errno.h>
39#include <fcntl.h>
40#include <string.h>
41#include <unistd.h>
42
43#define	DOMAIN_BACKUP_FILE "domain.bak"
44
45static const char domains[][MAXHOSTNAMELEN] = {
46	"1234567890",
47	"abcdefghijklmnopqrst",
48	"!#\xa4%&/(..xasS812=!=!(I(!;X;;X.as.dasa=?;,..<>|**^\xa8",
49	"--------------------------------------------------------------------"
50};
51
52static void
53backup_domain(void)
54{
55	char domain[MAXHOSTNAMELEN];
56	int fd;
57	size_t l;
58	ssize_t r,n = 0;
59
60	memset(domain, 0, sizeof(domain));
61
62	ATF_REQUIRE_EQ(0, getdomainname(domain, sizeof(domain)));
63	l = strnlen(domain, MAXHOSTNAMELEN);
64	fd = open(DOMAIN_BACKUP_FILE, O_WRONLY | O_CREAT | O_EXCL, 0644);
65	ATF_REQUIRE(fd >= 0);
66	while ((r = write(fd, domain + n, l - n)) > 0)
67		n += r;
68	ATF_REQUIRE_EQ(0, r);
69	close(fd);
70}
71
72static void
73restore_domain(void)
74{
75	char domain[MAXHOSTNAMELEN];
76	int fd;
77	ssize_t r, n = 0;
78
79	memset(domain, 0, sizeof(domain));
80	if ((fd = open(DOMAIN_BACKUP_FILE, O_RDONLY)) < 0)
81		err(1, "open");
82	while ((r = read(fd, domain + n, sizeof(domain) - n)) > 0)
83		n += r;
84	if (r < 0)
85		err(1, "read");
86	if (setdomainname(domain, n) != 0)
87		err(1, "setdomainname");
88	close(fd);
89}
90
91ATF_TC_WITH_CLEANUP(setdomainname_basic);
92ATF_TC_HEAD(setdomainname_basic, tc)
93{
94	atf_tc_set_md_var(tc, "descr", "A basic test of setdomainname(3)");
95	atf_tc_set_md_var(tc, "require.user", "root");
96}
97
98ATF_TC_BODY(setdomainname_basic, tc)
99{
100	char name[MAXHOSTNAMELEN];
101	size_t i;
102
103	backup_domain();
104	for (i = 0; i < __arraycount(domains); i++) {
105
106		(void)memset(name, 0, sizeof(name));
107
108#ifdef __FreeBSD__
109		/*
110		 * Sanity checks to ensure that the wrong invariant isn't being
111		 * tested for per PR # 181127
112		 */
113		ATF_REQUIRE_EQ(sizeof(domains[i]), MAXHOSTNAMELEN);
114		ATF_REQUIRE_EQ(sizeof(name), MAXHOSTNAMELEN);
115
116		ATF_REQUIRE(setdomainname(domains[i],sizeof(domains[i]) -  1) == 0);
117		ATF_REQUIRE(getdomainname(name, sizeof(name) - 1) == 0);
118#else
119		ATF_REQUIRE(setdomainname(domains[i],sizeof(domains[i])) == 0);
120		ATF_REQUIRE(getdomainname(name, sizeof(name)) == 0);
121#endif
122		ATF_REQUIRE(strcmp(domains[i], name) == 0);
123	}
124
125}
126
127ATF_TC_CLEANUP(setdomainname_basic, tc)
128{
129	restore_domain();
130}
131
132ATF_TC_WITH_CLEANUP(setdomainname_limit);
133ATF_TC_HEAD(setdomainname_limit, tc)
134{
135	atf_tc_set_md_var(tc, "descr", "Too long domain name errors out?");
136	atf_tc_set_md_var(tc, "require.user", "root");
137}
138
139ATF_TC_BODY(setdomainname_limit, tc)
140{
141	char name[MAXHOSTNAMELEN + 1];
142
143	(void)memset(name, 0, sizeof(name));
144	backup_domain();
145
146#ifdef __FreeBSD__
147	ATF_REQUIRE(setdomainname(name, MAXHOSTNAMELEN - 1 ) == 0);
148	ATF_REQUIRE(setdomainname(name, MAXHOSTNAMELEN) == -1);
149#endif
150	ATF_REQUIRE(setdomainname(name, sizeof(name)) == -1);
151}
152
153ATF_TC_CLEANUP(setdomainname_limit, tc)
154{
155	restore_domain();
156}
157
158ATF_TC(setdomainname_perm);
159ATF_TC_HEAD(setdomainname_perm, tc)
160{
161	atf_tc_set_md_var(tc, "descr", "Can normal user set the domain name?");
162	atf_tc_set_md_var(tc, "require.user", "unprivileged");
163}
164
165ATF_TC_BODY(setdomainname_perm, tc)
166{
167	char domain[MAXHOSTNAMELEN];
168
169	memset(domain, 0, sizeof(domain));
170
171	errno = 0;
172	ATF_REQUIRE_ERRNO(EPERM, setdomainname(domain, sizeof(domain)) == -1);
173}
174
175ATF_TP_ADD_TCS(tp)
176{
177	ATF_TP_ADD_TC(tp, setdomainname_basic);
178	ATF_TP_ADD_TC(tp, setdomainname_limit);
179	ATF_TP_ADD_TC(tp, setdomainname_perm);
180
181	return atf_no_error();
182}
183