1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *   Copyright (c) International Business Machines  Corp., 2001
4 *		07/2001 ported by John George
5 *   Copyright (c) 2022 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
6 */
7
8/*\
9 * [Description]
10 *
11 * Verify that the system call utime() successfully changes the last
12 * access and modification times of a file to the current time,
13 * under the following constraints:
14 *
15 * - The times argument is NULL.
16 * - The user ID of the process is not "root".
17 * - The file is owned by the user ID of the process.
18 */
19
20#include <utime.h>
21#include <pwd.h>
22
23#include "tst_test.h"
24#include "tst_clocks.h"
25
26#define MNT_POINT	"mntpoint"
27#define TEMP_FILE	MNT_POINT"/tmp_file"
28#define FILE_MODE	0444
29
30#define TEST_USERNAME "nobody"
31
32
33static void setup(void)
34{
35	struct passwd *pw;
36
37	pw = SAFE_GETPWNAM(TEST_USERNAME);
38
39	SAFE_TOUCH(TEMP_FILE, FILE_MODE, NULL);
40	SAFE_CHOWN(TEMP_FILE, pw->pw_uid, pw->pw_gid);
41
42	tst_res(TINFO, "Switching effective user ID to user: %s", pw->pw_name);
43
44	SAFE_SETEUID(pw->pw_uid);
45}
46
47static void run(void)
48{
49	struct utimbuf utbuf;
50	struct stat stat_buf;
51	time_t pre_time, post_time;
52
53	utbuf.modtime = tst_get_fs_timestamp() - 5;
54	utbuf.actime = utbuf.modtime + 1;
55	TST_EXP_PASS_SILENT(utime(TEMP_FILE, &utbuf));
56	SAFE_STAT(TEMP_FILE, &stat_buf);
57
58	TST_EXP_EQ_LI(stat_buf.st_atime, utbuf.actime);
59	TST_EXP_EQ_LI(stat_buf.st_mtime, utbuf.modtime);
60
61	pre_time = tst_get_fs_timestamp();
62	TST_EXP_PASS(utime(TEMP_FILE, NULL), "utime(%s, NULL)", TEMP_FILE);
63	if (!TST_PASS)
64		return;
65	post_time = tst_get_fs_timestamp();
66	SAFE_STAT(TEMP_FILE, &stat_buf);
67
68	if (stat_buf.st_mtime < pre_time || stat_buf.st_mtime > post_time)
69		tst_res(TFAIL, "utime() did not set expected mtime, "
70				"pre_time: %ld, post_time: %ld, st_mtime: %ld",
71				pre_time, post_time, stat_buf.st_mtime);
72
73	if (stat_buf.st_atime < pre_time || stat_buf.st_atime > post_time)
74		tst_res(TFAIL, "utime() did not set expected atime, "
75				"pre_time: %ld, post_time: %ld, st_atime: %ld",
76				pre_time, post_time, stat_buf.st_atime);
77}
78
79static struct tst_test test = {
80	.test_all = run,
81	.setup = setup,
82	.needs_root = 1,
83	.mntpoint = MNT_POINT,
84	.mount_device = 1,
85	.all_filesystems = 1,
86	.skip_filesystems = (const char *const[]) {
87		"vfat",
88		"exfat",
89		NULL
90	}
91};
92