1 /* $OpenBSD: t_mknod.c,v 1.3 2021/12/13 16:56:48 deraadt Exp $ */
2 /* $NetBSD: t_mknod.c,v 1.2 2012/03/18 07:00:52 jruoho Exp $ */
3
4 /*-
5 * Copyright (c) 2011 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jukka Ruohonen.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include "macros.h"
34
35 #include <sys/stat.h>
36
37 #include "atf-c.h"
38 #include <errno.h>
39 #include <fcntl.h>
40 #include <limits.h>
41 #include <paths.h>
42 #include <stdio.h>
43 #include <string.h>
44 #include <unistd.h>
45
46 static char path[] = "node";
47
48 ATF_TC_WITH_CLEANUP(mknod_err);
ATF_TC_HEAD(mknod_err,tc)49 ATF_TC_HEAD(mknod_err, tc)
50 {
51 atf_tc_set_md_var(tc, "descr",
52 "Test error conditions of mknod(2) (PR kern/45111)");
53 atf_tc_set_md_var(tc, "require.user", "root");
54 }
55
ATF_TC_BODY(mknod_err,tc)56 ATF_TC_BODY(mknod_err, tc)
57 {
58 char buf[PATH_MAX + 1];
59
60 (void)memset(buf, 'x', sizeof(buf));
61
62 errno = 0;
63 ATF_REQUIRE_ERRNO(EINVAL, mknod(path, S_IFCHR, -1) == -1);
64
65 errno = 0;
66 ATF_REQUIRE_ERRNO(ENAMETOOLONG, mknod(buf, S_IFCHR, 0) == -1);
67
68 errno = 0;
69 ATF_REQUIRE_ERRNO(EFAULT, mknod((char *)-1, S_IFCHR, 0) == -1);
70
71 errno = 0;
72 ATF_REQUIRE_ERRNO(ENOENT, mknod("/a/b/c/d/e/f/g", S_IFCHR, 0) == -1);
73 }
74
ATF_TC_CLEANUP(mknod_err,tc)75 ATF_TC_CLEANUP(mknod_err, tc)
76 {
77 (void)unlink(path);
78 }
79
80 ATF_TC_WITH_CLEANUP(mknod_exist);
ATF_TC_HEAD(mknod_exist,tc)81 ATF_TC_HEAD(mknod_exist, tc)
82 {
83 atf_tc_set_md_var(tc, "descr", "Test EEXIST from mknod(2)");
84 atf_tc_set_md_var(tc, "require.user", "root");
85 }
86
ATF_TC_BODY(mknod_exist,tc)87 ATF_TC_BODY(mknod_exist, tc)
88 {
89 int fd;
90
91 fd = open("/etc/passwd", O_RDONLY);
92
93 if (fd >= 0) {
94
95 (void)close(fd);
96
97 errno = 0;
98 ATF_REQUIRE_ERRNO(EEXIST,
99 mknod("/etc/passwd", S_IFCHR, 0) == -1);
100 }
101
102 ATF_REQUIRE(mknod(path, S_IFCHR, 0) == 0);
103
104 errno = 0;
105 ATF_REQUIRE_ERRNO(EEXIST, mknod(path, S_IFCHR, 0) == -1);
106
107 ATF_REQUIRE(unlink(path) == 0);
108 }
109
ATF_TC_CLEANUP(mknod_exist,tc)110 ATF_TC_CLEANUP(mknod_exist, tc)
111 {
112 (void)unlink(path);
113 }
114
115 ATF_TC_WITH_CLEANUP(mknod_perm);
ATF_TC_HEAD(mknod_perm,tc)116 ATF_TC_HEAD(mknod_perm, tc)
117 {
118 atf_tc_set_md_var(tc, "descr", "Test permissions of mknod(2)");
119 atf_tc_set_md_var(tc, "require.user", "unprivileged");
120 }
121
ATF_TC_BODY(mknod_perm,tc)122 ATF_TC_BODY(mknod_perm, tc)
123 {
124
125 errno = 0;
126 ATF_REQUIRE_ERRNO(EPERM, mknod(path, S_IFCHR, 0) == -1);
127
128 errno = 0;
129 ATF_REQUIRE_ERRNO(EPERM, mknod(path, S_IFBLK, 0) == -1);
130 }
131
ATF_TC_CLEANUP(mknod_perm,tc)132 ATF_TC_CLEANUP(mknod_perm, tc)
133 {
134 (void)unlink(path);
135 }
136
137 ATF_TC_WITH_CLEANUP(mknod_stat);
ATF_TC_HEAD(mknod_stat,tc)138 ATF_TC_HEAD(mknod_stat, tc)
139 {
140 atf_tc_set_md_var(tc, "descr", "A basic test of mknod(2)");
141 atf_tc_set_md_var(tc, "require.user", "root");
142 }
143
ATF_TC_BODY(mknod_stat,tc)144 ATF_TC_BODY(mknod_stat, tc)
145 {
146 struct stat st;
147
148 (void)memset(&st, 0, sizeof(struct stat));
149
150 ATF_REQUIRE(mknod(path, S_IFCHR, 0) == 0);
151 ATF_REQUIRE(stat(path, &st) == 0);
152
153 if (S_ISCHR(st.st_mode) == 0)
154 atf_tc_fail_nonfatal("invalid mode from mknod(2) (S_IFCHR)");
155
156 ATF_REQUIRE(unlink(path) == 0);
157
158 (void)memset(&st, 0, sizeof(struct stat));
159
160 ATF_REQUIRE(mknod(path, S_IFBLK, 0) == 0);
161 ATF_REQUIRE(stat(path, &st) == 0);
162
163 if (S_ISBLK(st.st_mode) == 0)
164 atf_tc_fail_nonfatal("invalid mode from mknod(2) (S_IFBLK)");
165
166 ATF_REQUIRE(unlink(path) == 0);
167
168 (void)memset(&st, 0, sizeof(struct stat));
169
170 #ifndef __OpenBSD__
171 /* OpenBSD only supports FIFO and device special files */
172 ATF_REQUIRE(mknod(path, S_IFREG, 0) == 0);
173 ATF_REQUIRE(stat(path, &st) == 0);
174
175 if (S_ISREG(st.st_mode) == 0)
176 atf_tc_fail_nonfatal("invalid mode from mknod(2) (S_IFREG)");
177
178 ATF_REQUIRE(unlink(path) == 0);
179 #endif
180 }
181
ATF_TC_CLEANUP(mknod_stat,tc)182 ATF_TC_CLEANUP(mknod_stat, tc)
183 {
184 (void)unlink(path);
185 }
186
ATF_TP_ADD_TCS(tp)187 ATF_TP_ADD_TCS(tp)
188 {
189
190 ATF_TP_ADD_TC(tp, mknod_err);
191 ATF_TP_ADD_TC(tp, mknod_exist);
192 ATF_TP_ADD_TC(tp, mknod_perm);
193 ATF_TP_ADD_TC(tp, mknod_stat);
194
195 return atf_no_error();
196 }
197