1/*
2 *
3 *   Copyright (c) International Business Machines  Corp., 2001
4 *
5 *   This program is free software;  you can redistribute it and/or modify
6 *   it under the terms of the GNU General Public License as published by
7 *   the Free Software Foundation; either version 2 of the License, or
8 *   (at your option) any later version.
9 *
10 *   This program is distributed in the hope that it will be useful,
11 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
13 *   the GNU General Public License for more details.
14 *
15 *   You should have received a copy of the GNU General Public License
16 *   along with this program;  if not, write to the Free Software
17 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20/*
21 * NAME
22 * 	chdir04.c
23 *
24 * DESCRIPTION
25 *	Testcase to test whether chdir(2) sets errno correctly.
26 *
27 * ALGORITHM
28 *	1.	Test for ENAMETOOLONG:
29 *		Create a bad directory name with length more than
30 *
31 *		VFS_MAXNAMELEN (Linux kernel variable), and attempt to
32 *		chdir(2) to it.
33 *
34 *	2.	Test for ENOENT:
35 *		Attempt to chdir(2) on a non-existent directory
36 *
37 *	3.	Test for EFAULT:
38 *		Pass an address which lies outside the address space of the
39 *		process, and expect an EFAULT.
40 *
41 * USAGE:  <for command-line>
42 * chdir04 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
43 *     where,  -c n : Run n copies concurrently.
44 *             -e   : Turn on errno logging.
45 *             -i n : Execute test n times.
46 *             -I x : Execute test for x seconds.
47 *             -P x : Pause for x seconds between iterations.
48 *             -t   : Turn on syscall timing.
49 *
50 * HISTORY
51 *	07/2001 Ported by Wayne Boyer
52 *
53 * RESTRICTIONS
54 *	NONE
55 */
56
57#include <stdio.h>
58#include <errno.h>
59#include <sys/stat.h>
60#include <sys/mman.h>
61#include "test.h"
62
63char *TCID = "chdir04";
64
65char bad_dir[] =
66    "abcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyz";
67
68char noexist_dir[] = "/tmp/noexistdir";
69
70struct test_case_t {
71	char *dname;
72	int error;
73} TC[] = {
74	/*
75	 * to test whether chdir() is setting ENAMETOOLONG if the
76	 * directory is more than VFS_MAXNAMELEN
77	 */
78	{
79	bad_dir, ENAMETOOLONG},
80	    /*
81	     * to test whether chdir() is setting ENOENT if the
82	     * directory is not existing.
83	     */
84	{
85	noexist_dir, ENOENT},
86#ifndef UCLINUX
87	    /*
88	     * to test whether chdir() is setting EFAULT if the
89	     * directory is an invalid address.
90	     */
91	{
92	(void *)-1, EFAULT}
93#endif
94};
95
96int TST_TOTAL = ARRAY_SIZE(TC);
97
98int flag;
99#define	FAILED	1
100
101void setup(void);
102void cleanup(void);
103
104char *bad_addr = 0;
105
106int main(int ac, char **av)
107{
108	int lc;
109	int i;
110
111	tst_parse_opts(ac, av, NULL, NULL);
112
113	setup();
114
115	for (lc = 0; TEST_LOOPING(lc); lc++) {
116		tst_count = 0;
117
118		for (i = 0; i < TST_TOTAL; i++) {
119
120			TEST(chdir(TC[i].dname));
121
122			if (TEST_RETURN != -1) {
123				tst_resm(TFAIL, "call succeeded unexpectedly");
124				continue;
125			}
126
127			if (TEST_ERRNO == TC[i].error)
128				tst_resm(TPASS | TTERRNO, "failed as expected");
129			else {
130				tst_resm(TFAIL | TTERRNO,
131					 "didn't fail as expected (expected %d)",
132					 TC[i].error);
133			}
134		}
135	}
136	cleanup();
137
138	tst_exit();
139
140}
141
142void setup(void)
143{
144
145	tst_sig(NOFORK, DEF_HANDLER, cleanup);
146
147	TEST_PAUSE;
148
149	tst_tmpdir();
150
151#ifdef UCLINUX
152	bad_addr = mmap(0, 1, PROT_NONE,
153			MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
154	if (bad_addr == MAP_FAILED)
155		tst_brkm(TBROK | TERRNO, cleanup, "mmap() failed");
156	TC[2].dname = bad_addr;
157#endif
158}
159
160void cleanup(void)
161{
162	tst_rmdir();
163
164}
165