t_mknod.c revision 276478 
1/* $NetBSD: t_mknod.c,v 1.2 2012/03/18 07:00:52 jruoho 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_mknod.c,v 1.2 2012/03/18 07:00:52 jruoho Exp $");
33
34#include <sys/stat.h>
35
36#include <atf-c.h>
37#include <errno.h>
38#include <fcntl.h>
39#include <limits.h>
40#include <paths.h>
41#include <stdio.h>
42#include <string.h>
43#include <unistd.h>
44
45static char	 path[] = "node";
46
47ATF_TC_WITH_CLEANUP(mknod_err);
48ATF_TC_HEAD(mknod_err, tc)
49{
50	atf_tc_set_md_var(tc, "descr",
51	    "Test error conditions of mknod(2) (PR kern/45111)");
52	atf_tc_set_md_var(tc, "require.user", "root");
53}
54
55ATF_TC_BODY(mknod_err, tc)
56{
57	char buf[PATH_MAX + 1];
58
59	(void)memset(buf, 'x', sizeof(buf));
60
61#ifndef __FreeBSD__
62	/*
63	 * As of FreeBSD 6.0 device nodes may be created in regular file systems but
64	 * such nodes cannot be used to access devices. As a result an invalid dev
65	 * argument is unchecked.
66	 */
67	errno = 0;
68	ATF_REQUIRE_ERRNO(EINVAL, mknod(path, S_IFCHR, -1) == -1);
69#endif
70
71	errno = 0;
72	ATF_REQUIRE_ERRNO(ENAMETOOLONG, mknod(buf, S_IFCHR, 0) == -1);
73
74	errno = 0;
75	ATF_REQUIRE_ERRNO(EFAULT, mknod((char *)-1, S_IFCHR, 0) == -1);
76
77	errno = 0;
78	ATF_REQUIRE_ERRNO(ENOENT, mknod("/a/b/c/d/e/f/g", S_IFCHR, 0) == -1);
79}
80
81ATF_TC_CLEANUP(mknod_err, tc)
82{
83	(void)unlink(path);
84}
85
86ATF_TC_WITH_CLEANUP(mknod_exist);
87ATF_TC_HEAD(mknod_exist, tc)
88{
89	atf_tc_set_md_var(tc, "descr", "Test EEXIST from mknod(2)");
90	atf_tc_set_md_var(tc, "require.user", "root");
91}
92
93ATF_TC_BODY(mknod_exist, tc)
94{
95	int fd;
96
97	fd = open("/etc/passwd", O_RDONLY);
98
99	if (fd >= 0) {
100
101		(void)close(fd);
102
103		errno = 0;
104		ATF_REQUIRE_ERRNO(EEXIST,
105		    mknod("/etc/passwd", S_IFCHR, 0) == -1);
106	}
107
108	ATF_REQUIRE(mknod(path, S_IFCHR, 0) == 0);
109
110	errno = 0;
111	ATF_REQUIRE_ERRNO(EEXIST, mknod(path, S_IFCHR, 0) == -1);
112
113	ATF_REQUIRE(unlink(path) == 0);
114}
115
116ATF_TC_CLEANUP(mknod_exist, tc)
117{
118	(void)unlink(path);
119}
120
121ATF_TC_WITH_CLEANUP(mknod_perm);
122ATF_TC_HEAD(mknod_perm, tc)
123{
124	atf_tc_set_md_var(tc, "descr", "Test permissions of mknod(2)");
125	atf_tc_set_md_var(tc, "require.user", "unprivileged");
126}
127
128ATF_TC_BODY(mknod_perm, tc)
129{
130
131	errno = 0;
132	ATF_REQUIRE_ERRNO(EPERM, mknod(path, S_IFCHR, 0) == -1);
133
134	errno = 0;
135	ATF_REQUIRE_ERRNO(EPERM, mknod(path, S_IFBLK, 0) == -1);
136}
137
138ATF_TC_CLEANUP(mknod_perm, tc)
139{
140	(void)unlink(path);
141}
142
143ATF_TC_WITH_CLEANUP(mknod_stat);
144ATF_TC_HEAD(mknod_stat, tc)
145{
146	atf_tc_set_md_var(tc, "descr", "A basic test of mknod(2)");
147	atf_tc_set_md_var(tc, "require.user", "root");
148}
149
150ATF_TC_BODY(mknod_stat, tc)
151{
152	struct stat st;
153
154	(void)memset(&st, 0, sizeof(struct stat));
155
156	ATF_REQUIRE(mknod(path, S_IFCHR, 0) == 0);
157	ATF_REQUIRE(stat(path, &st) == 0);
158
159	if (S_ISCHR(st.st_mode) == 0)
160		atf_tc_fail_nonfatal("invalid mode from mknod(2) (S_IFCHR)");
161
162	ATF_REQUIRE(unlink(path) == 0);
163
164	(void)memset(&st, 0, sizeof(struct stat));
165
166	ATF_REQUIRE(mknod(path, S_IFBLK, 0) == 0);
167	ATF_REQUIRE(stat(path, &st) == 0);
168
169	if (S_ISBLK(st.st_mode) == 0)
170		atf_tc_fail_nonfatal("invalid mode from mknod(2) (S_IFBLK)");
171
172	ATF_REQUIRE(unlink(path) == 0);
173
174	(void)memset(&st, 0, sizeof(struct stat));
175
176#ifdef __FreeBSD__
177	atf_tc_expect_fail("mknod does not allow S_IFREG");
178#endif
179	ATF_REQUIRE(mknod(path, S_IFREG, 0) == 0);
180	ATF_REQUIRE(stat(path, &st) == 0);
181
182	if (S_ISREG(st.st_mode) == 0)
183		atf_tc_fail_nonfatal("invalid mode from mknod(2) (S_IFREG)");
184
185	ATF_REQUIRE(unlink(path) == 0);
186}
187
188ATF_TC_CLEANUP(mknod_stat, tc)
189{
190	(void)unlink(path);
191}
192
193ATF_TP_ADD_TCS(tp)
194{
195
196	ATF_TP_ADD_TC(tp, mknod_err);
197	ATF_TP_ADD_TC(tp, mknod_exist);
198	ATF_TP_ADD_TC(tp, mknod_perm);
199	ATF_TP_ADD_TC(tp, mknod_stat);
200
201	return atf_no_error();
202}
203