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 * Verify that, stat(2) succeeds to get the status of a file and fills the
12 * stat structure elements regardless of whether process has or doesn't
13 * have read access to the file.
14 */
15
16#include <pwd.h>
17#include "tst_test.h"
18
19#define FILE_SIZE	 1024
20#define TST_FILEREAD     "test_fileread"
21#define TST_FILENOREAD   "test_filenoread"
22#define READ_MODE        0666
23#define NEW_MODE         0222
24#define MASK             0777
25
26static uid_t user_id;
27static gid_t group_id;
28static struct passwd *ltpuser;
29
30static struct tcase{
31	char *pathname;
32	unsigned int mode;
33} TC[] = {
34	{TST_FILEREAD, READ_MODE},
35	{TST_FILENOREAD, NEW_MODE}
36};
37
38static void verify_stat(unsigned int n)
39{
40	struct tcase *tc = TC + n;
41	struct stat stat_buf;
42
43	TST_EXP_PASS(stat(tc->pathname, &stat_buf));
44
45	TST_EXP_EQ_LU(stat_buf.st_uid, user_id);
46	TST_EXP_EQ_LU(stat_buf.st_gid, group_id);
47	TST_EXP_EQ_LI(stat_buf.st_size, FILE_SIZE);
48	TST_EXP_EQ_LU(stat_buf.st_mode & MASK, tc->mode);
49	TST_EXP_EQ_LU(stat_buf.st_nlink, 1);
50}
51
52static void setup(void)
53{
54	unsigned int i;
55
56	ltpuser = SAFE_GETPWNAM("nobody");
57	SAFE_SETUID(ltpuser->pw_uid);
58
59	for (i = 0; i < ARRAY_SIZE(TC); i++) {
60		if (tst_fill_file(TC[i].pathname, 'a', 256, 4))
61			tst_brk(TBROK, "Failed to create tst file %s",
62				TC[i].pathname);
63		SAFE_CHMOD(TC[i].pathname, TC[i].mode);
64	}
65
66	user_id = getuid();
67	group_id = getgid();
68}
69
70static struct tst_test test = {
71	.tcnt = ARRAY_SIZE(TC),
72	.setup = setup,
73	.test = verify_stat,
74	.needs_root = 1,
75	.needs_tmpdir = 1,
76};
77