test/jdk/java/nio/channels/FileChannel/BlockDeviceSize.java - master - githubmirror/jdk21u-dev

test/jdk/java/nio/channels/FileChannel/BlockDeviceSize.java
75 строк3 KB
Goetz Lindenmaier
8351086: (fc) Make java/nio/channels/FileChannel/BlockDeviceSize.java test manual
28 апр 2025, 17:31
28 апр 2025, 17:31ba118ef
/*
 * Copyright (c) 2014, 2025, 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 8313368
 * @requires (os.family == "linux")
 * @summary FileChannel.size() should be equal to RandomAccessFile.size() and > 0 for block devs on Linux
 * @comment The test must be launched with sudo or the block devices listed in
 * the BLK_FNAMES array must be readable by the user running the test.
 * @library /test/lib
 * @run main/manual BlockDeviceSize
 */

import java.io.RandomAccessFile;
import java.nio.file.Path;
import java.nio.channels.FileChannel;
import java.nio.file.AccessDeniedException;
import java.nio.file.NoSuchFileException;
import java.util.List;

import static java.nio.file.StandardOpenOption.*;

import jtreg.SkippedException;

public class BlockDeviceSize {
    private static final List<String> BLK_FNAMES = List.of("/dev/sda1", "/dev/nvme0n1", "/dev/xvda1") ;

    public static void main(String[] args) throws Throwable {
        for (String blkFname: BLK_FNAMES) {
            Path blkPath = Path.of(blkFname);
            try (FileChannel ch = FileChannel.open(blkPath, READ);
                 RandomAccessFile file = new RandomAccessFile(blkFname, "r")) {

                long size1 = ch.size();
                long size2 = file.length();
                if (size1 != size2) {
                    throw new RuntimeException("size differs when retrieved" +
                            " in different ways: " + size1 + " != " + size2);
                }
                if (size1 <= 0) {
                    throw new RuntimeException("size() for a block device size returns zero or a negative value");
                }
                System.out.println("OK");

            } catch (NoSuchFileException nsfe) {
                System.err.println("File " + blkFname + " not found." +
                        " Skipping test");
            } catch (AccessDeniedException ade) {
                throw new SkippedException("Access to " + blkFname + " is denied."
                        + " Run test as root.", ade);
            }

        }
    }
}