1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
4 * Copyright (c) Linux Test Project, 2002-2022
5 */
6
7/*\
8 * [Description]
9 *
10 * Verify that unlink(2) fails with
11 *
12 * - ENOENT when file does not exist
13 * - ENOENT when pathname is empty
14 * - ENOENT when a component in pathname does not exist
15 * - EFAULT when pathname points outside the accessible address space
16 * - ENOTDIR when a component used as a directory in pathname is not,
17 * in fact, a directory
18 * - ENAMETOOLONG when pathname is too long
19 */
20
21#include <errno.h>
22#include <limits.h>
23#include <string.h>
24#include <unistd.h>
25#include "tst_test.h"
26
27static char longpathname[PATH_MAX + 2];
28
29static struct test_case_t {
30	char *name;
31	char *desc;
32	int exp_errno;
33} tcases[] = {
34	{"nonexistfile", "non-existent file", ENOENT},
35	{"", "path is empty string", ENOENT},
36	{"nefile/file", "path contains a non-existent file", ENOENT},
37	{NULL, "invalid address", EFAULT},
38	{"file/file", "path contains a regular file", ENOTDIR},
39	{longpathname, "pathname too long", ENAMETOOLONG},
40};
41
42static void verify_unlink(unsigned int n)
43{
44	struct test_case_t *tc = &tcases[n];
45
46	TST_EXP_FAIL(unlink(tc->name), tc->exp_errno, "%s", tc->desc);
47}
48
49static void setup(void)
50{
51	size_t n;
52
53	SAFE_TOUCH("file", 0777, NULL);
54
55	memset(longpathname, 'a', PATH_MAX + 2);
56
57	for (n = 0; n < ARRAY_SIZE(tcases); n++) {
58		if (!tcases[n].name)
59			tcases[n].name = tst_get_bad_addr(NULL);
60	}
61}
62
63static struct tst_test test = {
64	.needs_tmpdir = 1,
65	.setup = setup,
66	.tcnt = ARRAY_SIZE(tcases),
67	.test = verify_unlink,
68};
69