1 /*
2 * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * You should have received a copy of the GNU General Public License along
13 * with this program; if not, write the Free Software Foundation, Inc.,
14 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
15 *
16 * AUTHOR : Nirmala Devi Dhanasekar <nirmala.devi@wipro.com>
17 *
18 * DESCRIPTION
19 * Verify that umount(2) returns -1 and sets errno to EPERM if the user
20 * is not the super-user.
21 */
22
23 #include <errno.h>
24 #include <pwd.h>
25 #include <sys/mount.h>
26 #include <sys/types.h>
27 #include <unistd.h>
28 #include "tst_test.h"
29
30 #define MNTPOINT "mntpoint"
31
32 static int mount_flag;
33
verify_umount(void)34 static void verify_umount(void)
35 {
36 TEST(umount(MNTPOINT));
37
38 if (TST_RET != -1) {
39 tst_res(TFAIL, "umount() succeeds unexpectedly");
40 return;
41 }
42
43 if (TST_ERR != EPERM) {
44 tst_res(TFAIL | TTERRNO, "umount() should fail with EPERM");
45 return;
46 }
47
48 tst_res(TPASS | TTERRNO, "umount() fails as expected");
49 }
50
setup(void)51 static void setup(void)
52 {
53 struct passwd *pw;
54
55 SAFE_MKDIR(MNTPOINT, 0775);
56 SAFE_MOUNT(tst_device->dev, MNTPOINT, tst_device->fs_type, 0, NULL);
57 mount_flag = 1;
58
59 pw = SAFE_GETPWNAM("nobody");
60 SAFE_SETEUID(pw->pw_uid);
61 }
62
cleanup(void)63 static void cleanup(void)
64 {
65 if (seteuid(0))
66 tst_res(TWARN | TERRNO, "seteuid(0) Failed");
67
68 if (mount_flag)
69 tst_umount(MNTPOINT);
70 }
71
72 static struct tst_test test = {
73 .needs_root = 1,
74 .needs_tmpdir = 1,
75 .format_device = 1,
76 .setup = setup,
77 .cleanup = cleanup,
78 .test_all = verify_umount,
79 };
80