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) 2021 SUSE LLC <[email protected]>
6 */
7
8 /*\
9 * [Description]
10 *
11 * Verify that the system call utime() successfully sets the modification
12 * and access times of a file to the current time, under the following
13 * constraints:
14 *
15 * - The times argument is NULL.
16 * - The user ID of the process is not "root".
17 * - The file is not owned by the user ID of the process.
18 * - The user ID of the process has write access to the file.
19 */
20
21 #include <pwd.h>
22 #include <utime.h>
23 #include <time.h>
24
25 #include "tst_test.h"
26 #include "tst_uid.h"
27 #include "tst_clocks.h"
28
29 #define MNTPOINT "mntpoint"
30 #define TEMP_FILE MNTPOINT"/tmp_file"
31 #define FILE_MODE 0766
32
33 static uid_t root_uid, user_uid;
34
setup(void)35 static void setup(void)
36 {
37 struct passwd *pw;
38 uid_t test_users[2];
39 int fd;
40
41 root_uid = getuid();
42 pw = SAFE_GETPWNAM("nobody");
43 test_users[0] = pw->pw_uid;
44 tst_get_uids(test_users, 1, 2);
45 user_uid = test_users[1];
46
47 fd = SAFE_CREAT(TEMP_FILE, FILE_MODE);
48 SAFE_CLOSE(fd);
49
50 /* Override umask */
51 SAFE_CHMOD(TEMP_FILE, FILE_MODE);
52 SAFE_CHOWN(TEMP_FILE, pw->pw_uid, pw->pw_gid);
53 }
54
run(void)55 static void run(void)
56 {
57 struct utimbuf utbuf;
58 struct stat statbuf;
59 time_t mintime, maxtime;
60
61 utbuf.modtime = time(0) - 5;
62 utbuf.actime = utbuf.modtime + 1;
63 TST_EXP_PASS_SILENT(utime(TEMP_FILE, &utbuf));
64 SAFE_STAT(TEMP_FILE, &statbuf);
65
66 if (statbuf.st_atime != utbuf.actime ||
67 statbuf.st_mtime != utbuf.modtime) {
68 tst_res(TFAIL, "Could not set initial file times");
69 return;
70 }
71
72 SAFE_SETEUID(user_uid);
73 mintime = tst_get_fs_timestamp();
74 TST_EXP_PASS(utime(TEMP_FILE, NULL));
75 maxtime = tst_get_fs_timestamp();
76 SAFE_SETEUID(root_uid);
77 SAFE_STAT(TEMP_FILE, &statbuf);
78
79 if (statbuf.st_atime < mintime || statbuf.st_atime > maxtime)
80 tst_res(TFAIL, "utime() did not set expected atime, "
81 "mintime: %ld, maxtime: %ld, st_atime: %ld",
82 mintime, maxtime, statbuf.st_atime);
83
84 if (statbuf.st_mtime < mintime || statbuf.st_mtime > maxtime)
85 tst_res(TFAIL, "utime() did not set expected mtime, "
86 "mintime: %ld, maxtime: %ld, st_mtime: %ld",
87 mintime, maxtime, statbuf.st_mtime);
88 }
89
90 static struct tst_test test = {
91 .test_all = run,
92 .setup = setup,
93 .needs_root = 1,
94 .mount_device = 1,
95 .mntpoint = MNTPOINT,
96 .all_filesystems = 1,
97 .skip_filesystems = (const char *const[]) {
98 "vfat",
99 "exfat",
100 NULL
101 }
102 };
103