1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 8054029
* @summary Block devices should not report size=0 on Linux
*/
import java.io.RandomAccessFile;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.channels.FileChannel;
import java.nio.file.AccessDeniedException;
import java.nio.file.NoSuchFileException;
import static java.nio.file.StandardOpenOption.*;
public class BlockDeviceSize {
private static final String BLK_FNAME = "/dev/sda1";
private static final Path BLK_PATH = Paths.get(BLK_FNAME);
public static void main(String[] args) throws Throwable {
try (FileChannel ch = FileChannel.open(BLK_PATH, READ);
RandomAccessFile file = new RandomAccessFile(BLK_FNAME, "r")) {
long size1 = ch.size();
long size2 = file.length();
if (size1 != size2) {
throw new RuntimeException("size differs when retrieved" +
" in different ways: " + size1 + " != " + size2);
}
System.out.println("OK");
} catch (NoSuchFileException nsfe) {
System.err.println("File " + BLK_FNAME + " not found." +
" Skipping test");
} catch (AccessDeniedException ade) {
System.err.println("Access to " + BLK_FNAME + " is denied." +
" Run test as root.");
}
}
}
|
