// /*************************************************************************** // The Disc Image Chef // ---------------------------------------------------------------------------- // // Filename : Acorn.cs // Author(s) : Natalia Portillo // // Component : Acorn filesystem plugin. // // --[ Description ] ---------------------------------------------------------- // // Identifies the Acorn filesystem 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 © 2011-2016 Natalia Portillo // ****************************************************************************/ using System; using System.Collections.Generic; using System.Runtime.InteropServices; using System.Text; using DiscImageChef.Console; namespace DiscImageChef.Filesystems { class AcornADFS : Filesystem { const ulong ADFS_SB_POS = 0xC00; public AcornADFS() { Name = "Acorn Advanced Disc Filing System"; PluginUUID = new Guid("BAFC1E50-9C64-4CD3-8400-80628CC27AFA"); } public AcornADFS(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd) { Name = "Acorn Advanced Disc Filing System"; PluginUUID = new Guid("BAFC1E50-9C64-4CD3-8400-80628CC27AFA"); } [StructLayout(LayoutKind.Sequential)] struct DiscRecord { [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x1C0)] public byte[] spare; public byte log2secsize; public byte spt; public byte heads; public byte density; public byte idlen; public byte log2bpmb; public byte skew; public byte bootoption; public byte lowsector; public byte nzones; public ushort zone_spare; public uint root; public uint disc_size; public ushort disc_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)] public byte[] disc_name; public uint disc_type; public uint disc_size_high; public byte flags; public byte nzones_high; public uint format_version; public uint root_size; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] reserved; } public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd) { if(partitionStart >= imagePlugin.GetSectors()) return false; ulong sbSector; if(imagePlugin.GetSectorSize() > ADFS_SB_POS) sbSector = 0; else sbSector = ADFS_SB_POS / imagePlugin.GetSectorSize(); byte[] sector = imagePlugin.ReadSector(sbSector + partitionStart); DiscRecord drSb; try { GCHandle handle = GCHandle.Alloc(sector, GCHandleType.Pinned); drSb = (DiscRecord)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(DiscRecord)); handle.Free(); } catch { return false; } if(drSb.log2secsize < 8 || drSb.log2secsize > 10) return false; if(drSb.idlen < (drSb.log2secsize + 3) || drSb.idlen > 19) return false; if((drSb.disc_size_high >> drSb.log2secsize) != 0) return false; if(!ArrayHelpers.ArrayIsNullOrEmpty(drSb.reserved)) return false; ulong bytes = drSb.disc_size_high; bytes *= 0x100000000; bytes += drSb.disc_size; if(bytes > (imagePlugin.GetSectors() * (ulong)imagePlugin.GetSectorSize())) return false; return true; } public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd, out string information) { StringBuilder sbInformation = new StringBuilder(); xmlFSType = new Schemas.FileSystemType(); information = ""; ulong sbSector; if(imagePlugin.GetSectorSize() > ADFS_SB_POS) sbSector = 0; else sbSector = ADFS_SB_POS / imagePlugin.GetSectorSize(); byte[] sector = imagePlugin.ReadSector(sbSector + partitionStart); GCHandle handle = GCHandle.Alloc(sector, GCHandleType.Pinned); DiscRecord drSb = (DiscRecord)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(DiscRecord)); handle.Free(); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.log2secsize = {0}", drSb.log2secsize); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.spt = {0}", drSb.spt); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.heads = {0}", drSb.heads); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.density = {0}", drSb.density); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.idlen = {0}", drSb.idlen); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.log2bpmb = {0}", drSb.log2bpmb); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.skew = {0}", drSb.skew); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.bootoption = {0}", drSb.bootoption); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.lowsector = {0}", drSb.lowsector); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.nzones = {0}", drSb.nzones); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.zone_spare = {0}", drSb.zone_spare); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.root = {0}", drSb.root); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.disc_size = {0}", drSb.disc_size); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.disc_id = {0}", drSb.disc_id); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.disc_name = {0}", StringHandlers.CToString(drSb.disc_name)); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.disc_type = {0}", drSb.disc_type); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.disc_size_high = {0}", drSb.disc_size_high); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.flags = {0}", drSb.flags); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.nzones_high = {0}", drSb.nzones_high); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.format_version = {0}", drSb.format_version); DicConsole.DebugWriteLine("ADFS Plugin", "drSb.root_size = {0}", drSb.root_size); if(drSb.log2secsize < 8 || drSb.log2secsize > 10) return; if(drSb.idlen < (drSb.log2secsize + 3) || drSb.idlen > 19) return; if((drSb.disc_size_high >> drSb.log2secsize) != 0) return; if(!ArrayHelpers.ArrayIsNullOrEmpty(drSb.reserved)) return; ulong bytes = drSb.disc_size_high; bytes *= 0x100000000; bytes += drSb.disc_size; ulong zones = drSb.nzones_high; zones *= 0x100000000; zones += drSb.nzones; if(bytes > (imagePlugin.GetSectors() * (ulong)imagePlugin.GetSectorSize())) return; string discname = StringHandlers.CToString(drSb.disc_name); sbInformation.AppendLine("Acorn Advanced Disc Filing System"); sbInformation.AppendLine(); sbInformation.AppendFormat("Version {0}", drSb.format_version).AppendLine(); sbInformation.AppendFormat("{0} bytes per sector", 1 << drSb.log2secsize).AppendLine(); sbInformation.AppendFormat("{0} sectors per track", drSb.spt).AppendLine(); sbInformation.AppendFormat("{0} heads", drSb.heads).AppendLine(); sbInformation.AppendFormat("Density code: {0}", drSb.density).AppendLine(); sbInformation.AppendFormat("Skew: {0}", drSb.skew).AppendLine(); sbInformation.AppendFormat("Boot option: {0}", drSb.bootoption).AppendLine(); sbInformation.AppendFormat("Root starts at byte {0}", drSb.root).AppendLine(); sbInformation.AppendFormat("Root is {0} bytes long", drSb.root_size).AppendLine(); sbInformation.AppendFormat("Volume has {0} bytes in {1} zones", bytes, zones).AppendLine(); sbInformation.AppendFormat("Volume flags: 0x{0:X4}", drSb.flags).AppendLine(); sbInformation.AppendFormat("Volume ID: {0}", drSb.disc_id).AppendLine(); sbInformation.AppendFormat("Volume name: {0}", discname).AppendLine(); information = sbInformation.ToString(); xmlFSType = new Schemas.FileSystemType(); xmlFSType.Bootable |= drSb.bootoption != 0; // Or not? xmlFSType.Clusters = (long)(bytes / (ulong)(1 << drSb.log2secsize)); xmlFSType.ClusterSize = (1 << drSb.log2secsize); xmlFSType.Type = "Acorn Advanced Disc Filing System"; xmlFSType.VolumeName = discname; xmlFSType.VolumeSerial = string.Format("{0}", drSb.disc_id); } public override Errno Mount() { return Errno.NotImplemented; } public override Errno Mount(bool debug) { return Errno.NotImplemented; } public override Errno Unmount() { return Errno.NotImplemented; } public override Errno MapBlock(string path, long fileBlock, ref long deviceBlock) { return Errno.NotImplemented; } public override Errno GetAttributes(string path, ref FileAttributes attributes) { return Errno.NotImplemented; } public override Errno ListXAttr(string path, ref List xattrs) { return Errno.NotImplemented; } public override Errno GetXattr(string path, string xattr, ref byte[] buf) { return Errno.NotImplemented; } public override Errno Read(string path, long offset, long size, ref byte[] buf) { return Errno.NotImplemented; } public override Errno ReadDir(string path, ref List contents) { return Errno.NotImplemented; } public override Errno StatFs(ref FileSystemInfo stat) { return Errno.NotImplemented; } public override Errno Stat(string path, ref FileEntryInfo stat) { return Errno.NotImplemented; } public override Errno ReadLink(string path, ref string dest) { return Errno.NotImplemented; } } }