1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Copyright (c) International Business Machines Corp., 2001
3 * 07/2001 John George
4 * -Ported
5 * Copyright (c) Linux Test Project, 2002-2022
6 */
7
8 /*\
9 * [Description]
10 *
11 * check stat() with various error conditions that should produce
12 * EACCES, EFAULT, ENAMETOOLONG, ENOENT, ENOTDIR, ELOOP
13 */
14
15 #include <pwd.h>
16 #include "tst_test.h"
17
18 #define TST_EACCES_DIR "tst_eaccesdir"
19 #define TST_EACCES_FILE "tst_eaccesdir/tst"
20 #define TST_ENOENT "tst_enoent/tst"
21 #define TST_ENOTDIR_DIR "tst_enotdir/tst"
22 #define TST_ENOTDIR_FILE "tst_enotdir"
23
24 #define MODE_RW 0666
25 #define DIR_MODE 0755
26
27 static struct passwd *ltpuser;
28
29 static char long_dir[PATH_MAX + 2] = {[0 ... PATH_MAX + 1] = 'a'};
30 static char loop_dir[PATH_MAX] = ".";
31
32 static struct tcase{
33 char *pathname;
34 int exp_errno;
35 } TC[] = {
36 {TST_EACCES_FILE, EACCES},
37 {NULL, EFAULT},
38 {long_dir, ENAMETOOLONG},
39 {TST_ENOENT, ENOENT},
40 {TST_ENOTDIR_DIR, ENOTDIR},
41 {loop_dir, ELOOP}
42 };
43
verify_stat(unsigned int n)44 static void verify_stat(unsigned int n)
45 {
46 struct tcase *tc = TC + n;
47 struct stat stat_buf;
48
49 TST_EXP_FAIL(stat(tc->pathname, &stat_buf), tc->exp_errno);
50 }
51
setup(void)52 static void setup(void)
53 {
54 unsigned int i;
55
56 ltpuser = SAFE_GETPWNAM("nobody");
57 SAFE_SETUID(ltpuser->pw_uid);
58
59 SAFE_MKDIR(TST_EACCES_DIR, DIR_MODE);
60 SAFE_TOUCH(TST_EACCES_FILE, DIR_MODE, NULL);
61 SAFE_CHMOD(TST_EACCES_DIR, MODE_RW);
62
63 for (i = 0; i < ARRAY_SIZE(TC); i++) {
64 if (TC[i].exp_errno == EFAULT)
65 TC[i].pathname = tst_get_bad_addr(NULL);
66 }
67
68 SAFE_TOUCH(TST_ENOTDIR_FILE, DIR_MODE, NULL);
69
70 SAFE_MKDIR("test_eloop", DIR_MODE);
71 SAFE_SYMLINK("../test_eloop", "test_eloop/test_eloop");
72 for (i = 0; i < 43; i++)
73 strcat(loop_dir, "/test_eloop");
74 }
75
76 static struct tst_test test = {
77 .tcnt = ARRAY_SIZE(TC),
78 .needs_tmpdir = 1,
79 .needs_root = 1,
80 .setup = setup,
81 .test = verify_stat,
82 };
83