PrintGPTPartitions.java

/*-
 * Copyright (C) 2007-2008 Erik Larsson
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.catacombae.hfsexplorer.tools;

import java.io.FileOutputStream;
import org.catacombae.util.Util;
import org.catacombae.storage.ps.gpt.types.GUIDPartitionTable;
import org.catacombae.storage.io.win32.ReadableWin32FileStream;
import org.catacombae.io.ReadableFileStream;
import org.catacombae.io.ReadableRandomAccessStream;

public class PrintGPTPartitions {

    public static void main(String[] args) throws Exception {
        ReadableRandomAccessStream llf;
        if(ReadableWin32FileStream.isSystemSupported())
            llf = new ReadableWin32FileStream(args[0]);
        else
            llf = new ReadableFileStream(args[0]);

        byte[] referencetable = new byte[16896];
        llf.seek(512);
        llf.readFully(referencetable);
        FileOutputStream refFile = new FileOutputStream("gpt_table_ref.debug");
        refFile.write(referencetable);
        refFile.close();
        System.out.println("Wrote the raw GPT table to file: gpt_table_ref.debug");

        System.out.println("Length of file: " + llf.length());
        GUIDPartitionTable gpt = new GUIDPartitionTable(llf, 0);
        System.out.println("Calculated checksum for header: 0x" + Util.toHexStringBE(gpt.calculatePrimaryHeaderChecksum()));
        System.out.println("Calculated checksum for entries: 0x" + Util.toHexStringBE(gpt.calculatePrimaryEntriesChecksum()));
        gpt.print(System.out, "");
        System.out.println("Is this partition table valid? " + gpt.isValid() + ".");
        FileOutputStream debug = new FileOutputStream("gpt_table.debug");
        debug.write(gpt.getPrimaryTableBytes());
        debug.close();
        System.out.println("Wrote the leading GPT table to file: gpt_table.debug");

        llf.close();

    }

}