1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *   Copyright (c) International Business Machines  Corp., 2001
4 *		07/2001 John George
5 *   Copyright (c) 2022 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
6 */
7
8/*\
9 * [Description]
10 *
11 * Verify that system call utime() fails with
12 *
13 * - EACCES when times argument is NULL and user does not have rights to modify
14 *   the file.
15 * - ENOENT when specified file does not exist.
16 * - EPERM when times argument is not NULL and user does not have rights to
17 *   modify the file.
18 * - EROFS when the path resides on a read-only filesystem.
19 */
20
21#include <pwd.h>
22#include <utime.h>
23
24#include "tst_test.h"
25
26#define TEMP_FILE	"tmp_file"
27#define MNT_POINT	"mntpoint"
28#define FILE_MODE	0644
29#define TEST_USERNAME "nobody"
30
31static const struct utimbuf times;
32
33static struct tcase {
34	char *pathname;
35	int exp_errno;
36	const struct utimbuf *utimbuf;
37	char *err_desc;
38} tcases[] = {
39	{TEMP_FILE, EACCES, NULL, "No write access"},
40	{"", ENOENT, NULL, "File not exist"},
41	{TEMP_FILE, EPERM, &times, "Not file owner"},
42	{MNT_POINT, EROFS, NULL, "Read-only filesystem"}
43};
44
45
46static void setup(void)
47{
48	struct passwd *pw;
49
50	SAFE_TOUCH(TEMP_FILE, FILE_MODE, NULL);
51
52	pw = SAFE_GETPWNAM(TEST_USERNAME);
53	tst_res(TINFO, "Switching effective user ID to user: %s", pw->pw_name);
54	SAFE_SETEUID(pw->pw_uid);
55}
56
57static void run(unsigned int i)
58{
59	struct tcase *tc = &tcases[i];
60
61	TST_EXP_FAIL(utime(tc->pathname, tc->utimbuf),
62				tc->exp_errno, "%s", tc->err_desc);
63}
64
65static struct tst_test test = {
66	.setup = setup,
67	.test = run,
68	.tcnt = ARRAY_SIZE(tcases),
69	.needs_root = 1,
70	.needs_tmpdir = 1,
71	.mntpoint = MNT_POINT,
72	.needs_rofs = 1
73};
74