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 <mdoucha@suse.cz>
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 <sys/types.h>
22 #include <pwd.h>
23 #include <utime.h>
24 #include <sys/stat.h>
25 #include <time.h>
26
27 #include "tst_test.h"
28 #include "tst_uid.h"
29 #include "tst_clocks.h"
30
31 #define MNTPOINT "mntpoint"
32 #define TEMP_FILE MNTPOINT"/tmp_file"
33 #define FILE_MODE 0766
34
35 static uid_t root_uid, user_uid;
36
setup(void)37 static void setup(void)
38 {
39 struct passwd *pw;
40 uid_t test_users[2];
41 int fd;
42
43 root_uid = getuid();
44 pw = SAFE_GETPWNAM("nobody");
45 test_users[0] = pw->pw_uid;
46 tst_get_uids(test_users, 1, 2);
47 user_uid = test_users[1];
48
49 fd = SAFE_CREAT(TEMP_FILE, FILE_MODE);
50 SAFE_CLOSE(fd);
51
52 /* Override umask */
53 SAFE_CHMOD(TEMP_FILE, FILE_MODE);
54 SAFE_CHOWN(TEMP_FILE, pw->pw_uid, pw->pw_gid);
55 }
56
run(void)57 static void run(void)
58 {
59 struct utimbuf utbuf;
60 struct stat statbuf;
61 time_t mintime, maxtime;
62
63 utbuf.modtime = time(0) - 5;
64 utbuf.actime = utbuf.modtime + 1;
65 TST_EXP_PASS_SILENT(utime(TEMP_FILE, &utbuf));
66 SAFE_STAT(TEMP_FILE, &statbuf);
67
68 if (statbuf.st_atime != utbuf.actime ||
69 statbuf.st_mtime != utbuf.modtime) {
70 tst_res(TFAIL, "Could not set initial file times");
71 return;
72 }
73
74 SAFE_SETEUID(user_uid);
75 mintime = tst_get_fs_timestamp();
76 TST_EXP_PASS(utime(TEMP_FILE, NULL));
77 maxtime = tst_get_fs_timestamp();
78 SAFE_SETEUID(root_uid);
79 SAFE_STAT(TEMP_FILE, &statbuf);
80
81 if (statbuf.st_atime < mintime || statbuf.st_atime > maxtime)
82 tst_res(TFAIL, "utime() did not set expected atime");
83
84 if (statbuf.st_mtime < mintime || statbuf.st_mtime > maxtime)
85 tst_res(TFAIL, "utime() did not set expected mtime");
86 }
87
88 static struct tst_test test = {
89 .test_all = run,
90 .setup = setup,
91 .needs_root = 1,
92 .mount_device = 1,
93 .mntpoint = MNTPOINT,
94 .all_filesystems = 1,
95 .skip_filesystems = (const char *const[]) {
96 "vfat",
97 "exfat",
98 NULL
99 }
100 };
101