1/*	$OpenBSD: t_unlink.c,v 1.3 2023/10/31 07:59:52 claudio Exp $	*/
2/* $NetBSD: t_unlink.c,v 1.4 2017/01/14 20:55:26 christos 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 <string.h>
42#include <unistd.h>
43
44static char	 path[] = "unlink";
45
46ATF_TC_WITH_CLEANUP(unlink_basic);
47ATF_TC_HEAD(unlink_basic, tc)
48{
49	atf_tc_set_md_var(tc, "descr", "A basic test of unlink(2)");
50}
51
52ATF_TC_BODY(unlink_basic, tc)
53{
54	const size_t n = 512;
55	size_t i;
56	int fd;
57
58	for (i = 0; i < n; i++) {
59
60		fd = open(path, O_RDWR | O_CREAT, 0666);
61
62		ATF_REQUIRE(fd != -1);
63		ATF_REQUIRE(close(fd) == 0);
64		ATF_REQUIRE(unlink(path) == 0);
65
66		errno = 0;
67		ATF_REQUIRE_ERRNO(ENOENT, open(path, O_RDONLY) == -1);
68	}
69}
70
71ATF_TC_CLEANUP(unlink_basic, tc)
72{
73	(void)unlink(path);
74}
75
76ATF_TC_WITH_CLEANUP(unlink_err);
77ATF_TC_HEAD(unlink_err, tc)
78{
79	atf_tc_set_md_var(tc, "descr", "Test error conditions of unlink(2)");
80}
81
82ATF_TC_BODY(unlink_err, tc)
83{
84	char buf[PATH_MAX + 1];
85
86	(void)memset(buf, 'x', sizeof(buf));
87
88	errno = 0;
89	ATF_REQUIRE(unlink("/") == -1);
90
91	errno = 0;
92	ATF_REQUIRE_ERRNO(ENAMETOOLONG, unlink(buf) == -1);
93
94	errno = 0;
95	ATF_REQUIRE_ERRNO(ENOENT, unlink("/a/b/c/d/e/f/g/h/i/j/k/l/m") == -1);
96}
97
98ATF_TC_CLEANUP(unlink_err, tc)
99{
100	(void)unlink(path);
101}
102
103ATF_TC_WITH_CLEANUP(unlink_fifo);
104ATF_TC_HEAD(unlink_fifo, tc)
105{
106	atf_tc_set_md_var(tc, "descr", "Test unlink(2) for a FIFO");
107}
108
109ATF_TC_BODY(unlink_fifo, tc)
110{
111
112	ATF_REQUIRE(mkfifo(path, 0666) == 0);
113	ATF_REQUIRE(unlink(path) == 0);
114
115	errno = 0;
116	ATF_REQUIRE_ERRNO(ENOENT, open(path, O_RDONLY) == -1);
117}
118
119ATF_TC_CLEANUP(unlink_fifo, tc)
120{
121	(void)unlink(path);
122}
123
124ATF_TC_WITH_CLEANUP(unlink_perm);
125ATF_TC_HEAD(unlink_perm, tc)
126{
127	atf_tc_set_md_var(tc, "descr", "Test permissions with unlink(2)");
128	atf_tc_set_md_var(tc, "require.user", "unprivileged");
129}
130
131ATF_TC_BODY(unlink_perm, tc)
132{
133	int rv;
134
135	errno = 0;
136	rv = unlink("/etc");
137	ATF_REQUIRE_MSG(rv == -1 && (errno == EACCES || errno == EPERM),
138	    "unlinking a directory did not fail with EPERM or EACCESS; "
139	    "unlink() returned %d, errno %d", rv, errno);
140
141	errno = 0;
142	ATF_REQUIRE_ERRNO(EACCES, unlink("/root/.profile") == -1);
143}
144
145ATF_TC_CLEANUP(unlink_perm, tc)
146{
147	(void)unlink(path);
148}
149
150ATF_TP_ADD_TCS(tp)
151{
152
153	ATF_TP_ADD_TC(tp, unlink_basic);
154	ATF_TP_ADD_TC(tp, unlink_err);
155	ATF_TP_ADD_TC(tp, unlink_fifo);
156	ATF_TP_ADD_TC(tp, unlink_perm);
157
158	return atf_no_error();
159}
160