mirror of
https://github.com/aaru-dps/Aaru.git
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173 lines
7.5 KiB
C#
173 lines
7.5 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Info.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Apple Macintosh File System plugin.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Text;
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using Aaru.CommonTypes.AaruMetadata;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Helpers;
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using Claunia.Encoding;
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using Encoding = System.Text.Encoding;
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using Partition = Aaru.CommonTypes.Partition;
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namespace Aaru.Filesystems;
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// Information from Inside Macintosh Volume II
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public sealed partial class AppleMFS
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{
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#region IReadOnlyFilesystem Members
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/// <inheritdoc />
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public bool Identify(IMediaImage imagePlugin, Partition partition)
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{
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if(2 + partition.Start >= partition.End) return false;
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ErrorNumber errno = imagePlugin.ReadSector(2 + partition.Start, false, out byte[] mdbSector, out _);
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if(errno != ErrorNumber.NoError) return false;
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var drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, 0x000);
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return drSigWord == MFS_MAGIC;
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}
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/// <inheritdoc />
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public void GetInformation(IMediaImage imagePlugin, Partition partition, Encoding encoding, out string information,
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out FileSystem metadata)
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{
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encoding ??= new MacRoman();
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information = "";
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metadata = new FileSystem();
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var sb = new StringBuilder();
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var mdb = new MasterDirectoryBlock();
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ErrorNumber errno = imagePlugin.ReadSector(2 + partition.Start, false, out byte[] mdbSector, out _);
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if(errno != ErrorNumber.NoError) return;
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errno = imagePlugin.ReadSector(0 + partition.Start, false, out byte[] bbSector, out _);
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if(errno != ErrorNumber.NoError) return;
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mdb.drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, 0x000);
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if(mdb.drSigWord != MFS_MAGIC) return;
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mdb.drCrDate = BigEndianBitConverter.ToUInt32(mdbSector, 0x002);
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mdb.drLsBkUp = BigEndianBitConverter.ToUInt32(mdbSector, 0x006);
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mdb.drAtrb = (AppleCommon.VolumeAttributes)BigEndianBitConverter.ToUInt16(mdbSector, 0x00A);
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mdb.drNmFls = BigEndianBitConverter.ToUInt16(mdbSector, 0x00C);
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mdb.drDirSt = BigEndianBitConverter.ToUInt16(mdbSector, 0x00E);
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mdb.drBlLen = BigEndianBitConverter.ToUInt16(mdbSector, 0x010);
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mdb.drNmAlBlks = BigEndianBitConverter.ToUInt16(mdbSector, 0x012);
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mdb.drAlBlkSiz = BigEndianBitConverter.ToUInt32(mdbSector, 0x014);
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mdb.drClpSiz = BigEndianBitConverter.ToUInt32(mdbSector, 0x018);
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mdb.drAlBlSt = BigEndianBitConverter.ToUInt16(mdbSector, 0x01C);
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mdb.drNxtFNum = BigEndianBitConverter.ToUInt32(mdbSector, 0x01E);
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mdb.drFreeBks = BigEndianBitConverter.ToUInt16(mdbSector, 0x022);
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mdb.drVNSiz = mdbSector[0x024];
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var variableSize = new byte[mdb.drVNSiz + 1];
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Array.Copy(mdbSector, 0x024, variableSize, 0, mdb.drVNSiz + 1);
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mdb.drVN = StringHandlers.PascalToString(variableSize, encoding);
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sb.AppendLine(Localization.AppleMFS_Name);
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sb.AppendLine();
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sb.AppendLine(Localization.Master_Directory_Block);
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sb.AppendFormat(Localization.Creation_date_0, DateHandlers.MacToDateTime(mdb.drCrDate)).AppendLine();
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sb.AppendFormat(Localization.Last_backup_date_0, DateHandlers.MacToDateTime(mdb.drLsBkUp)).AppendLine();
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if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.HardwareLock))
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sb.AppendLine(Localization.Volume_is_locked_by_hardware);
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sb.AppendLine(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.Unmounted)
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? Localization.Volume_was_unmonted
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: Localization.Volume_is_mounted);
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if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.SparedBadBlocks))
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sb.AppendLine(Localization.Volume_has_spared_bad_blocks);
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if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.DoesNotNeedCache))
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sb.AppendLine(Localization.Volume_does_not_need_cache);
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if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.BootInconsistent))
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sb.AppendLine(Localization.Boot_volume_is_inconsistent);
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if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.ReusedIds))
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sb.AppendLine(Localization.There_are_reused_CNIDs);
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if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.Inconsistent))
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sb.AppendLine(Localization.Volume_is_seriously_inconsistent);
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if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.SoftwareLock))
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sb.AppendLine(Localization.Volume_is_locked_by_software);
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sb.AppendFormat(Localization._0_files_in_volume, mdb.drNmFls).AppendLine();
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sb.AppendFormat(Localization.First_directory_sector_0, mdb.drDirSt).AppendLine();
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sb.AppendFormat(Localization._0_sectors_in_directory, mdb.drBlLen).AppendLine();
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sb.AppendFormat(Localization._0_volume_allocation_blocks, mdb.drNmAlBlks + 1).AppendLine();
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sb.AppendFormat(Localization.Size_of_allocation_blocks_0_bytes, mdb.drAlBlkSiz).AppendLine();
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sb.AppendFormat(Localization._0_bytes_to_allocate, mdb.drClpSiz).AppendLine();
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sb.AppendFormat(Localization.First_allocation_block_number_two_starts_in_sector_0, mdb.drAlBlSt).AppendLine();
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sb.AppendFormat(Localization.Next_unused_file_number_0, mdb.drNxtFNum).AppendLine();
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sb.AppendFormat(Localization._0_unused_allocation_blocks, mdb.drFreeBks).AppendLine();
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sb.AppendFormat(Localization.Volume_name_0, mdb.drVN).AppendLine();
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string bootBlockInfo = AppleCommon.GetBootBlockInformation(bbSector, encoding);
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if(bootBlockInfo != null)
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{
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sb.AppendLine(Localization.Volume_is_bootable);
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sb.AppendLine();
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sb.AppendLine(bootBlockInfo);
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}
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else
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sb.AppendLine(Localization.Volume_is_not_bootable);
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information = sb.ToString();
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metadata = new FileSystem();
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if(mdb.drLsBkUp > 0) metadata.BackupDate = DateHandlers.MacToDateTime(mdb.drLsBkUp);
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metadata.Bootable = bootBlockInfo != null;
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metadata.Clusters = mdb.drNmAlBlks;
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metadata.ClusterSize = mdb.drAlBlkSiz;
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if(mdb.drCrDate > 0) metadata.CreationDate = DateHandlers.MacToDateTime(mdb.drCrDate);
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metadata.Files = mdb.drNmFls;
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metadata.FreeClusters = mdb.drFreeBks;
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metadata.Type = FS_TYPE;
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metadata.VolumeName = mdb.drVN;
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}
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#endregion
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} |