1// SPDX-License-Identifier: GPL-2.0-or-later
2/* Copyright (c) International Business Machines Corp., 2001
3 * Ported to LTP: Wayne Boyer
4 */
5/*
6 * Description:
7 *   1) attempt to rmdir() non-empty directory -> ENOTEMPTY
8 *   2) attempt to rmdir() directory with long path name -> ENAMETOOLONG
9 *   3) attempt to rmdir() non-existing directory -> ENOENT
10 *   4) attempt to rmdir() a file -> ENOTDIR
11 *   5) attempt to rmdir() invalid pointer -> EFAULT
12 *   6) attempt to rmdir() symlink loop -> ELOOP
13 *   7) attempt to rmdir() dir on RO mounted FS -> EROFS
14 *   8) attempt to rmdir() mount point -> EBUSY
15 *   9) attempt to rmdir() current directory "." -> EINVAL
16 */
17
18#include <errno.h>
19
20#include "tst_test.h"
21
22#define DIR_MODE	(S_IRWXU | S_IRWXG | S_IRWXO)
23#define FILE_MODE	(S_IRWXU | S_IRWXG | S_IRWXO)
24
25#define TESTDIR		"testdir"
26#define TESTDIR2	"nosuchdir/testdir2"
27#define TESTDIR3	"testfile2/testdir3"
28#define TESTDIR4	"/loopdir"
29#define MNT_POINT	"mntpoint"
30#define TESTDIR5	"mntpoint/dir"
31#define TESTFILE    "testdir/testfile"
32#define TESTFILE2   "testfile2"
33
34static char longpathname[PATH_MAX + 2];
35static char looppathname[sizeof(TESTDIR4) * 43] = ".";
36
37static struct testcase {
38	char *dir;
39	int exp_errno;
40} tcases[] =  {
41	{TESTDIR, ENOTEMPTY},
42	{longpathname, ENAMETOOLONG},
43	{TESTDIR2, ENOENT},
44	{TESTDIR3, ENOTDIR},
45	{NULL, EFAULT},
46	{looppathname, ELOOP},
47	{TESTDIR5, EROFS},
48	{MNT_POINT, EBUSY},
49	{".", EINVAL}
50};
51
52static void setup(void)
53{
54	unsigned int i;
55
56	SAFE_MKDIR(TESTDIR, DIR_MODE);
57	SAFE_TOUCH(TESTFILE, FILE_MODE, NULL);
58
59	memset(longpathname, 'a', PATH_MAX + 1);
60
61	SAFE_TOUCH(TESTFILE2, FILE_MODE, NULL);
62
63	for (i = 0; i < ARRAY_SIZE(tcases); i++) {
64		if (!tcases[i].dir)
65			tcases[i].dir = tst_get_bad_addr(NULL);
66	}
67
68	/*
69	 * NOTE: the ELOOP test is written based on that the
70	 * consecutive symlinks limit in kernel is hardwired
71	 * to 40.
72	 */
73	SAFE_MKDIR("loopdir", DIR_MODE);
74	SAFE_SYMLINK("../loopdir", "loopdir/loopdir");
75	for (i = 0; i < 43; i++)
76		strcat(looppathname, TESTDIR4);
77}
78
79static void verify_rmdir(unsigned int n)
80{
81	struct testcase *tc = &tcases[n];
82
83	TEST(rmdir(tc->dir));
84
85	if (TST_RET != -1) {
86		tst_res(TFAIL, "rmdir() succeeded unexpectedly (%li)",
87			TST_RET);
88		return;
89	}
90
91	if (TST_ERR == tc->exp_errno) {
92		tst_res(TPASS | TTERRNO, "rmdir() failed as expected");
93		return;
94	}
95
96	tst_res(TFAIL | TTERRNO,
97		"rmdir() failed unexpectedly; expected: %d - %s",
98		tc->exp_errno, tst_strerrno(tc->exp_errno));
99}
100
101static struct tst_test test = {
102	.setup = setup,
103	.tcnt = ARRAY_SIZE(tcases),
104	.test = verify_rmdir,
105	.needs_root = 1,
106	.needs_rofs = 1,
107	.mntpoint = MNT_POINT,
108};
109