1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
4 * Copyright (c) Linux Test Project, 2002-2023
5 * Author: Nirmala Devi Dhanasekar <[email protected]>
6 */
7
8 /*\
9 * [Description]
10 *
11 * Verify that umount(2) returns -1 and sets errno to EPERM if the user
12 * is not the super-user.
13 */
14
15 #include <pwd.h>
16 #include <sys/mount.h>
17 #include "tst_test.h"
18
19 #define MNTPOINT "mntpoint"
20
21 static int mount_flag;
22
verify_umount(void)23 static void verify_umount(void)
24 {
25 TST_EXP_FAIL(umount(MNTPOINT), EPERM);
26 }
27
setup(void)28 static void setup(void)
29 {
30 struct passwd *pw;
31
32 SAFE_MKDIR(MNTPOINT, 0775);
33 SAFE_MOUNT(tst_device->dev, MNTPOINT, tst_device->fs_type, 0, NULL);
34 mount_flag = 1;
35
36 pw = SAFE_GETPWNAM("nobody");
37 SAFE_SETEUID(pw->pw_uid);
38 }
39
cleanup(void)40 static void cleanup(void)
41 {
42 if (seteuid(0))
43 tst_res(TWARN | TERRNO, "seteuid(0) Failed");
44
45 if (mount_flag)
46 tst_umount(MNTPOINT);
47 }
48
49 static struct tst_test test = {
50 .needs_root = 1,
51 .format_device = 1,
52 .setup = setup,
53 .cleanup = cleanup,
54 .test_all = verify_umount,
55 };
56