// /*************************************************************************** // The Disc Image Chef // ---------------------------------------------------------------------------- // // Filename : Info.cs // Author(s) : Natalia Portillo // // Component : Apple Macintosh File System plugin. // // --[ Description ] ---------------------------------------------------------- // // Identifies the Apple Macintosh File System and shows information. // // --[ 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 . // // ---------------------------------------------------------------------------- // Copyright © 2011-2020 Natalia Portillo // ****************************************************************************/ using System; using System.Text; using Claunia.Encoding; using DiscImageChef.CommonTypes; using DiscImageChef.CommonTypes.Interfaces; using Schemas; using Encoding = System.Text.Encoding; namespace DiscImageChef.Filesystems.AppleMFS { // Information from Inside Macintosh Volume II public partial class AppleMFS { public bool Identify(IMediaImage imagePlugin, Partition partition) { if(2 + partition.Start >= partition.End) return false; byte[] mdbSector = imagePlugin.ReadSector(2 + partition.Start); ushort drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, 0x000); return drSigWord == MFS_MAGIC; } public void GetInformation(IMediaImage imagePlugin, Partition partition, out string information, Encoding encoding) { Encoding = encoding ?? new MacRoman(); information = ""; StringBuilder sb = new StringBuilder(); MFS_MasterDirectoryBlock mdb = new MFS_MasterDirectoryBlock(); MFS_BootBlock bb = new MFS_BootBlock(); byte[] pString = new byte[16]; byte[] mdbSector = imagePlugin.ReadSector(2 + partition.Start); byte[] bbSector = imagePlugin.ReadSector(0 + partition.Start); mdb.drSigWord = BigEndianBitConverter.ToUInt16(mdbSector, 0x000); if(mdb.drSigWord != MFS_MAGIC) return; mdb.drCrDate = BigEndianBitConverter.ToUInt32(mdbSector, 0x002); mdb.drLsBkUp = BigEndianBitConverter.ToUInt32(mdbSector, 0x006); mdb.drAtrb = BigEndianBitConverter.ToUInt16(mdbSector, 0x00A); mdb.drNmFls = BigEndianBitConverter.ToUInt16(mdbSector, 0x00C); mdb.drDirSt = BigEndianBitConverter.ToUInt16(mdbSector, 0x00E); mdb.drBlLen = BigEndianBitConverter.ToUInt16(mdbSector, 0x010); mdb.drNmAlBlks = BigEndianBitConverter.ToUInt16(mdbSector, 0x012); mdb.drAlBlkSiz = BigEndianBitConverter.ToUInt32(mdbSector, 0x014); mdb.drClpSiz = BigEndianBitConverter.ToUInt32(mdbSector, 0x018); mdb.drAlBlSt = BigEndianBitConverter.ToUInt16(mdbSector, 0x01C); mdb.drNxtFNum = BigEndianBitConverter.ToUInt32(mdbSector, 0x01E); mdb.drFreeBks = BigEndianBitConverter.ToUInt16(mdbSector, 0x022); mdb.drVNSiz = mdbSector[0x024]; byte[] variableSize = new byte[mdb.drVNSiz + 1]; Array.Copy(mdbSector, 0x024, variableSize, 0, mdb.drVNSiz + 1); mdb.drVN = StringHandlers.PascalToString(variableSize, Encoding); bb.signature = BigEndianBitConverter.ToUInt16(bbSector, 0x000); if(bb.signature == MFSBB_MAGIC) { bb.branch = BigEndianBitConverter.ToUInt32(bbSector, 0x002); bb.boot_flags = bbSector[0x006]; bb.boot_version = bbSector[0x007]; bb.sec_sv_pages = BigEndianBitConverter.ToInt16(bbSector, 0x008); Array.Copy(mdbSector, 0x00A, pString, 0, 16); bb.system_name = StringHandlers.PascalToString(pString, Encoding); Array.Copy(mdbSector, 0x01A, pString, 0, 16); bb.finder_name = StringHandlers.PascalToString(pString, Encoding); Array.Copy(mdbSector, 0x02A, pString, 0, 16); bb.debug_name = StringHandlers.PascalToString(pString, Encoding); Array.Copy(mdbSector, 0x03A, pString, 0, 16); bb.disasm_name = StringHandlers.PascalToString(pString, Encoding); Array.Copy(mdbSector, 0x04A, pString, 0, 16); bb.stupscr_name = StringHandlers.PascalToString(pString, Encoding); Array.Copy(mdbSector, 0x05A, pString, 0, 16); bb.bootup_name = StringHandlers.PascalToString(pString, Encoding); Array.Copy(mdbSector, 0x06A, pString, 0, 16); bb.clipbrd_name = StringHandlers.PascalToString(pString, Encoding); bb.max_files = BigEndianBitConverter.ToUInt16(bbSector, 0x07A); bb.queue_size = BigEndianBitConverter.ToUInt16(bbSector, 0x07C); bb.heap_128k = BigEndianBitConverter.ToUInt32(bbSector, 0x07E); bb.heap_256k = BigEndianBitConverter.ToUInt32(bbSector, 0x082); bb.heap_512k = BigEndianBitConverter.ToUInt32(bbSector, 0x086); } else bb.signature = 0x0000; sb.AppendLine("Apple Macintosh File System"); sb.AppendLine(); sb.AppendLine("Master Directory Block:"); sb.AppendFormat("Creation date: {0}", DateHandlers.MacToDateTime(mdb.drCrDate)).AppendLine(); sb.AppendFormat("Last backup date: {0}", DateHandlers.MacToDateTime(mdb.drLsBkUp)).AppendLine(); if((mdb.drAtrb & 0x80) == 0x80) sb.AppendLine("Volume is locked by hardware."); if((mdb.drAtrb & 0x8000) == 0x8000) sb.AppendLine("Volume is locked by software."); sb.AppendFormat("{0} files on volume", mdb.drNmFls).AppendLine(); sb.AppendFormat("First directory sector: {0}", mdb.drDirSt).AppendLine(); sb.AppendFormat("{0} sectors in directory.", mdb.drBlLen).AppendLine(); sb.AppendFormat("{0} volume allocation blocks.", mdb.drNmAlBlks + 1).AppendLine(); sb.AppendFormat("Size of allocation blocks: {0} bytes", mdb.drAlBlkSiz).AppendLine(); sb.AppendFormat("{0} bytes to allocate.", mdb.drClpSiz).AppendLine(); sb.AppendFormat("First allocation block (#2) starts in sector {0}.", mdb.drAlBlSt).AppendLine(); sb.AppendFormat("Next unused file number: {0}", mdb.drNxtFNum).AppendLine(); sb.AppendFormat("{0} unused allocation blocks.", mdb.drFreeBks).AppendLine(); sb.AppendFormat("Volume name: {0}", mdb.drVN).AppendLine(); if(bb.signature == MFSBB_MAGIC) { sb.AppendLine("Volume is bootable."); sb.AppendLine(); sb.AppendLine("Boot Block:"); if((bb.boot_flags & 0x40) == 0x40) sb.AppendLine("Boot block should be executed."); if((bb.boot_flags & 0x80) == 0x80) sb.AppendLine("Boot block is in new unknown format."); else { if(bb.sec_sv_pages > 0) sb.AppendLine("Allocate secondary sound buffer at boot."); else if(bb.sec_sv_pages < 0) sb.AppendLine("Allocate secondary sound and video buffers at boot."); sb.AppendFormat("System filename: {0}", bb.system_name).AppendLine(); sb.AppendFormat("Finder filename: {0}", bb.finder_name).AppendLine(); sb.AppendFormat("Debugger filename: {0}", bb.debug_name).AppendLine(); sb.AppendFormat("Disassembler filename: {0}", bb.disasm_name).AppendLine(); sb.AppendFormat("Startup screen filename: {0}", bb.stupscr_name).AppendLine(); sb.AppendFormat("First program to execute at boot: {0}", bb.bootup_name).AppendLine(); sb.AppendFormat("Clipboard filename: {0}", bb.clipbrd_name).AppendLine(); sb.AppendFormat("Maximum opened files: {0}", bb.max_files * 4).AppendLine(); sb.AppendFormat("Event queue size: {0}", bb.queue_size).AppendLine(); sb.AppendFormat("Heap size with 128KiB of RAM: {0} bytes", bb.heap_128k).AppendLine(); sb.AppendFormat("Heap size with 256KiB of RAM: {0} bytes", bb.heap_256k).AppendLine(); sb.AppendFormat("Heap size with 512KiB of RAM or more: {0} bytes", bb.heap_512k).AppendLine(); } } else sb.AppendLine("Volume is not bootable."); information = sb.ToString(); XmlFsType = new FileSystemType(); if(mdb.drLsBkUp > 0) { XmlFsType.BackupDate = DateHandlers.MacToDateTime(mdb.drLsBkUp); XmlFsType.BackupDateSpecified = true; } XmlFsType.Bootable = bb.signature == MFSBB_MAGIC; XmlFsType.Clusters = mdb.drNmAlBlks; XmlFsType.ClusterSize = mdb.drAlBlkSiz; if(mdb.drCrDate > 0) { XmlFsType.CreationDate = DateHandlers.MacToDateTime(mdb.drCrDate); XmlFsType.CreationDateSpecified = true; } XmlFsType.Files = mdb.drNmFls; XmlFsType.FilesSpecified = true; XmlFsType.FreeClusters = mdb.drFreeBks; XmlFsType.FreeClustersSpecified = true; XmlFsType.Type = "MFS"; XmlFsType.VolumeName = mdb.drVN; } } }