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 <[email protected]>
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
setup(void)33 static 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
run(void)47 static 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
79 static 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