1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 *
5 * 07/2001 Ported by Wayne Boyer
6 */
7
8 /*\
9 * [Description]
10 *
11 * Testcase to test whether chroot(2) sets errno correctly.
12 *
13 * - to test whether chroot() is setting ENAMETOOLONG if the
14 * pathname is more than VFS_MAXNAMELEN.
15 * - to test whether chroot() is setting ENOTDIR if the argument
16 * is not a directory.
17 * - to test whether chroot() is setting ENOENT if the directory
18 * does not exist.
19 * - attempt to chroot to a path pointing to an invalid address
20 * and expect EFAULT as errno.
21 * - to test whether chroot() is setting ELOOP if the two
22 * symbolic directory who point to each other.
23 */
24
25 #include <stdio.h>
26 #include "tst_test.h"
27
28 static char fname[255];
29 static char nonexistent_dir[100] = "testdir";
30 static char bad_dir[] = "abcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyz";
31 static char symbolic_dir[] = "sym_dir1";
32
33 static struct tcase {
34 char *dir;
35 int error;
36 char *desc;
37 } tcases[] = {
38 {bad_dir, ENAMETOOLONG, "chroot(longer than VFS_MAXNAMELEN)"},
39 {fname, ENOTDIR, "chroot(not a directory)"},
40 {nonexistent_dir, ENOENT, "chroot(does not exists)"},
41 {(char *)-1, EFAULT, "chroot(an invalid address)"},
42 {symbolic_dir, ELOOP, "chroot(symlink loop)"}
43 };
44
verify_chroot(unsigned int n)45 static void verify_chroot(unsigned int n)
46 {
47 struct tcase *tc = &tcases[n];
48
49 TST_EXP_FAIL(chroot(tc->dir), tc->error, "%s", tc->desc);
50 }
51
setup(void)52 static void setup(void)
53 {
54 unsigned int i;
55
56 (void)sprintf(fname, "tfile_%d", getpid());
57 SAFE_TOUCH(fname, 0666, NULL);
58
59 for (i = 0; i < ARRAY_SIZE(tcases); i++) {
60 if (tcases[i].error == EFAULT)
61 tcases[3].dir = tst_get_bad_addr(NULL);
62 }
63
64 SAFE_SYMLINK("sym_dir1/", "sym_dir2");
65 SAFE_SYMLINK("sym_dir2/", "sym_dir1");
66 }
67
68 static struct tst_test test = {
69 .setup = setup,
70 .tcnt = ARRAY_SIZE(tcases),
71 .test = verify_chroot,
72 .needs_tmpdir = 1,
73 };
74