t_unlink.c revision 314817 
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
43static char	 path[] = "unlink";
44
45ATF_TC_WITH_CLEANUP(unlink_basic);
46ATF_TC_HEAD(unlink_basic, tc)
47{
48	atf_tc_set_md_var(tc, "descr", "A basic test of unlink(2)");
49}
50
51ATF_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
70ATF_TC_CLEANUP(unlink_basic, tc)
71{
72	(void)unlink(path);
73}
74
75ATF_TC_WITH_CLEANUP(unlink_err);
76ATF_TC_HEAD(unlink_err, tc)
77{
78	atf_tc_set_md_var(tc, "descr", "Test error conditions of unlink(2)");
79}
80
81ATF_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
101ATF_TC_CLEANUP(unlink_err, tc)
102{
103	(void)unlink(path);
104}
105
106ATF_TC_WITH_CLEANUP(unlink_fifo);
107ATF_TC_HEAD(unlink_fifo, tc)
108{
109	atf_tc_set_md_var(tc, "descr", "Test unlink(2) for a FIFO");
110}
111
112ATF_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
122ATF_TC_CLEANUP(unlink_fifo, tc)
123{
124	(void)unlink(path);
125}
126
127ATF_TC_WITH_CLEANUP(unlink_perm);
128ATF_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
134ATF_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
148ATF_TC_CLEANUP(unlink_perm, tc)
149{
150	(void)unlink(path);
151}
152
153ATF_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