1 /* $NetBSD: t_unlink.c,v 1.4 2017/01/14 20:55:26 christos 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_unlink.c,v 1.4 2017/01/14 20:55:26 christos 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 <string.h>
41 #include <unistd.h>
42
43 static char path[] = "unlink";
44
45 ATF_TC_WITH_CLEANUP(unlink_basic);
ATF_TC_HEAD(unlink_basic,tc)46 ATF_TC_HEAD(unlink_basic, tc)
47 {
48 atf_tc_set_md_var(tc, "descr", "A basic test of unlink(2)");
49 }
50
ATF_TC_BODY(unlink_basic,tc)51 ATF_TC_BODY(unlink_basic, tc)
52 {
53 const size_t n = 512;
54 size_t i;
55 int fd;
56
57 for (i = 0; i < n; i++) {
58
59 fd = open(path, O_RDWR | O_CREAT, 0666);
60
61 ATF_REQUIRE(fd != -1);
62 ATF_REQUIRE(close(fd) == 0);
63 ATF_REQUIRE(unlink(path) == 0);
64
65 errno = 0;
66 ATF_REQUIRE_ERRNO(ENOENT, open(path, O_RDONLY) == -1);
67 }
68 }
69
ATF_TC_CLEANUP(unlink_basic,tc)70 ATF_TC_CLEANUP(unlink_basic, tc)
71 {
72 (void)unlink(path);
73 }
74
75 ATF_TC_WITH_CLEANUP(unlink_err);
ATF_TC_HEAD(unlink_err,tc)76 ATF_TC_HEAD(unlink_err, tc)
77 {
78 atf_tc_set_md_var(tc, "descr", "Test error conditions of unlink(2)");
79 }
80
ATF_TC_BODY(unlink_err,tc)81 ATF_TC_BODY(unlink_err, tc)
82 {
83 char buf[PATH_MAX + 1];
84
85 (void)memset(buf, 'x', sizeof(buf));
86
87 errno = 0;
88 #ifdef __FreeBSD__
89 ATF_REQUIRE_ERRNO(EISDIR, unlink("/") == -1);
90 #else
91 ATF_REQUIRE_ERRNO(EBUSY, unlink("/") == -1);
92 #endif
93
94 errno = 0;
95 ATF_REQUIRE_ERRNO(ENAMETOOLONG, unlink(buf) == -1);
96
97 errno = 0;
98 ATF_REQUIRE_ERRNO(ENOENT, unlink("/a/b/c/d/e/f/g/h/i/j/k/l/m") == -1);
99 }
100
ATF_TC_CLEANUP(unlink_err,tc)101 ATF_TC_CLEANUP(unlink_err, tc)
102 {
103 (void)unlink(path);
104 }
105
106 ATF_TC_WITH_CLEANUP(unlink_fifo);
ATF_TC_HEAD(unlink_fifo,tc)107 ATF_TC_HEAD(unlink_fifo, tc)
108 {
109 atf_tc_set_md_var(tc, "descr", "Test unlink(2) for a FIFO");
110 }
111
ATF_TC_BODY(unlink_fifo,tc)112 ATF_TC_BODY(unlink_fifo, tc)
113 {
114
115 ATF_REQUIRE(mkfifo(path, 0666) == 0);
116 ATF_REQUIRE(unlink(path) == 0);
117
118 errno = 0;
119 ATF_REQUIRE_ERRNO(ENOENT, open(path, O_RDONLY) == -1);
120 }
121
ATF_TC_CLEANUP(unlink_fifo,tc)122 ATF_TC_CLEANUP(unlink_fifo, tc)
123 {
124 (void)unlink(path);
125 }
126
127 ATF_TC_WITH_CLEANUP(unlink_perm);
ATF_TC_HEAD(unlink_perm,tc)128 ATF_TC_HEAD(unlink_perm, tc)
129 {
130 atf_tc_set_md_var(tc, "descr", "Test permissions with unlink(2)");
131 atf_tc_set_md_var(tc, "require.user", "unprivileged");
132 }
133
ATF_TC_BODY(unlink_perm,tc)134 ATF_TC_BODY(unlink_perm, tc)
135 {
136 int rv;
137
138 errno = 0;
139 rv = unlink("/etc");
140 ATF_REQUIRE_MSG(rv == -1 && (errno == EACCES || errno == EPERM),
141 "unlinking a directory did not fail with EPERM or EACCESS; "
142 "unlink() returned %d, errno %d", rv, errno);
143
144 errno = 0;
145 ATF_REQUIRE_ERRNO(EACCES, unlink("/root/.profile") == -1);
146 }
147
ATF_TC_CLEANUP(unlink_perm,tc)148 ATF_TC_CLEANUP(unlink_perm, tc)
149 {
150 (void)unlink(path);
151 }
152
ATF_TP_ADD_TCS(tp)153 ATF_TP_ADD_TCS(tp)
154 {
155
156 ATF_TP_ADD_TC(tp, unlink_basic);
157 ATF_TP_ADD_TC(tp, unlink_err);
158 ATF_TP_ADD_TC(tp, unlink_fifo);
159 ATF_TP_ADD_TC(tp, unlink_perm);
160
161 return atf_no_error();
162 }
163