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Aaru/Aaru.Filesystems/AppleHFS/Info.cs

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// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename : Info.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Apple Hierarchical File System plugin.
//
// --[ License ] --------------------------------------------------------------
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2025 Natalia Portillo
// ****************************************************************************/
using System;
using System.Linq;
using System.Text;
using Aaru.CommonTypes.AaruMetadata;
using Aaru.CommonTypes.Enums;
using Aaru.CommonTypes.Interfaces;
using Aaru.Helpers;
using Partition = Aaru.CommonTypes.Partition;
namespace Aaru.Filesystems;
// Information from Inside Macintosh
// https://developer.apple.com/legacy/library/documentation/mac/pdf/Files/File_Manager.pdf
public sealed partial class AppleHFS
{
#region IFilesystem Members
/// <inheritdoc />
public bool Identify(IMediaImage imagePlugin, Partition partition)
{
if(2 + partition.Start >= partition.End) return false;
byte[] mdbSector;
ushort drSigWord;
ErrorNumber errno;
if(imagePlugin.Info.SectorSize is 2352 or 2448 or 2048)
{
errno = imagePlugin.ReadSectors(partition.Start, 2, out mdbSector);
if(errno != ErrorNumber.NoError) return false;
foreach(int offset in new[]
{
0, 0x200, 0x400, 0x600, 0x800, 0xA00
}.Where(offset => mdbSector.Length >= offset + 0x7C + 2))
{
drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, offset);
if(drSigWord != AppleCommon.HFS_MAGIC) continue;
drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, offset + 0x7C); // Seek to embedded HFS+ signature
return drSigWord != AppleCommon.HFSP_MAGIC;
}
}
else
{
errno = imagePlugin.ReadSector(2 + partition.Start, out mdbSector);
if(errno != ErrorNumber.NoError) return false;
if(mdbSector.Length < 0x7C + 2) return false;
drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, 0);
if(drSigWord != AppleCommon.HFS_MAGIC) return false;
drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, 0x7C); // Seek to embedded HFS+ signature
return drSigWord != AppleCommon.HFSP_MAGIC;
}
return false;
}
/// <inheritdoc />
public void GetInformation(IMediaImage imagePlugin, Partition partition, Encoding encoding, out string information,
out FileSystem metadata)
{
encoding ??= Encoding.GetEncoding("macintosh");
information = "";
metadata = new FileSystem();
var sb = new StringBuilder();
byte[] bbSector = null;
byte[] mdbSector = null;
ushort drSigWord;
ErrorNumber errno;
var apmFromHddOnCd = false;
if(imagePlugin.Info.SectorSize is 2352 or 2448 or 2048)
{
errno = imagePlugin.ReadSectors(partition.Start, 2, out byte[] tmpSector);
if(errno != ErrorNumber.NoError) return;
foreach(int offset in new[]
{
0, 0x200, 0x400, 0x600, 0x800, 0xA00
})
{
drSigWord = BigEndianBitConverter.ToUInt16(tmpSector, offset);
if(drSigWord != AppleCommon.HFS_MAGIC) continue;
bbSector = new byte[1024];
mdbSector = new byte[512];
if(offset >= 0x400) Array.Copy(tmpSector, offset - 0x400, bbSector, 0, 1024);
Array.Copy(tmpSector, offset, mdbSector, 0, 512);
apmFromHddOnCd = true;
break;
}
if(!apmFromHddOnCd) return;
}
else
{
errno = imagePlugin.ReadSector(2 + partition.Start, out mdbSector);
if(errno != ErrorNumber.NoError) return;
drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, 0);
if(drSigWord == AppleCommon.HFS_MAGIC)
{
errno = imagePlugin.ReadSector(partition.Start, out bbSector);
if(errno != ErrorNumber.NoError) return;
}
else
return;
}
MasterDirectoryBlock mdb = Marshal.ByteArrayToStructureBigEndian<MasterDirectoryBlock>(mdbSector);
sb.AppendLine(Localization.Name_Apple_Hierarchical_File_System);
sb.AppendLine();
if(apmFromHddOnCd)
sb.AppendLine(Localization.HFS_uses_512_bytes_sector_while_device_uses_2048_bytes_sector).AppendLine();
sb.AppendLine(Localization.Master_Directory_Block);
sb.AppendFormat(Localization.Creation_date_0, DateHandlers.MacToDateTime(mdb.drCrDate)).AppendLine();
sb.AppendFormat(Localization.Last_modification_date_0, DateHandlers.MacToDateTime(mdb.drLsMod)).AppendLine();
if(mdb.drVolBkUp > 0)
{
sb.AppendFormat(Localization.Last_backup_date_0, DateHandlers.MacToDateTime(mdb.drVolBkUp)).AppendLine();
sb.AppendFormat(Localization.Backup_sequence_number_0, mdb.drVSeqNum).AppendLine();
}
else
sb.AppendLine(Localization.Volume_has_never_been_backed_up);
if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.HardwareLock))
sb.AppendLine(Localization.Volume_is_locked_by_hardware);
sb.AppendLine(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.Unmounted)
? Localization.Volume_was_unmonted
: Localization.Volume_is_mounted);
if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.SparedBadBlocks))
sb.AppendLine(Localization.Volume_has_spared_bad_blocks);
if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.DoesNotNeedCache))
sb.AppendLine(Localization.Volume_does_not_need_cache);
if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.BootInconsistent))
sb.AppendLine(Localization.Boot_volume_is_inconsistent);
if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.ReusedIds))
sb.AppendLine(Localization.There_are_reused_CNIDs);
if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.Journaled)) sb.AppendLine(Localization.Volume_is_journaled);
if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.Inconsistent))
sb.AppendLine(Localization.Volume_is_seriously_inconsistent);
if(mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.SoftwareLock))
sb.AppendLine(Localization.Volume_is_locked_by_software);
sb.AppendFormat(Localization._0_files_in_root_directory, mdb.drNmFls).AppendLine();
sb.AppendFormat(Localization._0_directories_in_root_directory, mdb.drNmRtDirs).AppendLine();
sb.AppendFormat(Localization._0_files_in_volume, mdb.drFilCnt).AppendLine();
sb.AppendFormat(Localization._0_directories_in_volume, mdb.drDirCnt).AppendLine();
sb.AppendFormat(Localization.Volume_write_count_0, mdb.drWrCnt).AppendLine();
sb.AppendFormat(Localization.Volume_bitmap_starting_sector_in_512_bytes_0, mdb.drVBMSt).AppendLine();
sb.AppendFormat(Localization.Next_allocation_block_0, mdb.drAllocPtr).AppendLine();
sb.AppendFormat(Localization._0_volume_allocation_blocks, mdb.drNmAlBlks).AppendLine();
sb.AppendFormat(Localization._0_bytes_per_allocation_block, mdb.drAlBlkSiz).AppendLine();
sb.AppendFormat(Localization._0_bytes_to_allocate_when_extending_a_file, mdb.drClpSiz).AppendLine();
sb.AppendFormat(Localization._0_bytes_to_allocate_when_extending_a_Extents_B_Tree, mdb.drXTClpSiz).AppendLine();
sb.AppendFormat(Localization._0_bytes_to_allocate_when_extending_a_Catalog_B_Tree, mdb.drCTClpSiz).AppendLine();
sb.AppendFormat(Localization.Sector_of_first_allocation_block_0, mdb.drAlBlSt).AppendLine();
sb.AppendFormat(Localization.Next_unused_CNID_0, mdb.drNxtCNID).AppendLine();
sb.AppendFormat(Localization._0_unused_allocation_blocks, mdb.drFreeBks).AppendLine();
sb.AppendFormat(Localization._0_bytes_in_the_Extents_B_Tree, mdb.drXTFlSize).AppendLine();
sb.AppendFormat(Localization._0_bytes_in_the_Catalog_B_Tree, mdb.drCTFlSize).AppendLine();
sb.AppendFormat(Localization.Volume_name_0, StringHandlers.PascalToString(mdb.drVN, encoding)).AppendLine();
sb.AppendLine(Localization.Finder_info);
sb.AppendFormat(Localization.CNID_of_bootable_system_directory_0, mdb.drFndrInfo0).AppendLine();
sb.AppendFormat(Localization.CNID_of_first_run_application_directory_0, mdb.drFndrInfo1).AppendLine();
sb.AppendFormat(Localization.CNID_of_previously_opened_directory_0, mdb.drFndrInfo2).AppendLine();
sb.AppendFormat(Localization.CNID_of_bootable_Mac_OS_8_or_9_directory_0, mdb.drFndrInfo3).AppendLine();
sb.AppendFormat(Localization.CNID_of_bootable_Mac_OS_X_directory_0, mdb.drFndrInfo5).AppendLine();
if(mdb.drFndrInfo6 != 0 && mdb.drFndrInfo7 != 0)
sb.AppendFormat(Localization.Mac_OS_X_Volume_ID_0_1, mdb.drFndrInfo6, mdb.drFndrInfo7).AppendLine();
if(mdb.drEmbedSigWord == AppleCommon.HFSP_MAGIC)
{
sb.AppendLine(Localization.Volume_wraps_a_HFS_Plus_volume);
sb.AppendFormat(Localization.Starting_block_of_the_HFS_Plus_volume_0, mdb.xdrStABNt).AppendLine();
sb.AppendFormat(Localization.Allocations_blocks_of_the_HFS_Plus_volume_0, mdb.xdrNumABlks).AppendLine();
}
else
{
sb.AppendFormat(Localization._0_blocks_in_volume_cache, mdb.drVCSize).AppendLine();
sb.AppendFormat(Localization._0_blocks_in_volume_bitmap_cache, mdb.drVBMCSize).AppendLine();
sb.AppendFormat(Localization._0_blocks_in_volume_common_cache, mdb.drCtlCSize).AppendLine();
}
string bootBlockInfo = AppleCommon.GetBootBlockInformation(bbSector, encoding);
if(bootBlockInfo != null)
{
sb.AppendLine(Localization.Volume_is_bootable);
sb.AppendLine();
sb.AppendLine(bootBlockInfo);
}
else if(mdb.drFndrInfo0 != 0 || mdb.drFndrInfo3 != 0 || mdb.drFndrInfo5 != 0)
sb.AppendLine(Localization.Volume_is_bootable);
else
sb.AppendLine(Localization.Volume_is_not_bootable);
information = sb.ToString();
metadata = new FileSystem();
if(mdb.drVolBkUp > 0) metadata.BackupDate = DateHandlers.MacToDateTime(mdb.drVolBkUp);
metadata.Bootable =
bootBlockInfo != null || mdb.drFndrInfo0 != 0 || mdb.drFndrInfo3 != 0 || mdb.drFndrInfo5 != 0;
metadata.Clusters = mdb.drNmAlBlks;
metadata.ClusterSize = mdb.drAlBlkSiz;
if(mdb.drCrDate > 0) metadata.CreationDate = DateHandlers.MacToDateTime(mdb.drCrDate);
metadata.Dirty = !mdb.drAtrb.HasFlag(AppleCommon.VolumeAttributes.Unmounted);
metadata.Files = mdb.drFilCnt;
metadata.FreeClusters = mdb.drFreeBks;
if(mdb.drLsMod > 0) metadata.ModificationDate = DateHandlers.MacToDateTime(mdb.drLsMod);
metadata.Type = FS_TYPE;
metadata.VolumeName = StringHandlers.PascalToString(mdb.drVN, encoding);
if(mdb.drFndrInfo6 != 0 && mdb.drFndrInfo7 != 0)
metadata.VolumeSerial = $"{mdb.drFndrInfo6:X8}{mdb.drFndrInfo7:X8}";
}
#endregion
}
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