Added support for the MicroDOS file system.

DiscImageChef.Filesystems/DiscImageChef.Filesystems.csproj

@@ -136,6 +136,7 @@
     <Compile Include="LIF.cs" />
     <Compile Include="Locus.cs" />
     <Compile Include="dump.cs" />
+    <Compile Include="MicroDOS.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>
@@ -193,7 +194,7 @@
       <Properties>
         <Policies>
           <TextStylePolicy FileWidth="120" TabWidth="4" IndentWidth="4" RemoveTrailingWhitespace="True" NoTabsAfterNonTabs="False" EolMarker="Native" TabsToSpaces="True" scope="text/x-csharp" />
-          <CSharpFormattingPolicy IndentBlock="True" IndentBraces="False" IndentSwitchSection="True" IndentSwitchCaseSection="True" LabelPositioning="OneLess" NewLinesForBracesInTypes="True" NewLinesForBracesInMethods="True" NewLinesForBracesInProperties="True" NewLinesForBracesInAccessors="True" NewLinesForBracesInAnonymousMethods="True" NewLinesForBracesInControlBlocks="True" NewLinesForBracesInAnonymousTypes="True" NewLinesForBracesInObjectCollectionArrayInitializers="True" NewLinesForBracesInLambdaExpressionBody="True" NewLineForElse="True" NewLineForCatch="True" NewLineForFinally="True" NewLineForMembersInObjectInit="True" NewLineForMembersInAnonymousTypes="True" NewLineForClausesInQuery="True" SpacingAfterMethodDeclarationName="False" SpaceWithinMethodDeclarationParenthesis="False" SpaceBetweenEmptyMethodDeclarationParentheses="False" SpaceAfterMethodCallName="False" SpaceWithinMethodCallParentheses="False" SpaceBetweenEmptyMethodCallParentheses="False" SpaceWithinExpressionParentheses="False" SpaceWithinCastParentheses="False" SpaceWithinOtherParentheses="False" SpaceAfterCast="False" SpacesIgnoreAroundVariableDeclaration="False" SpaceBeforeOpenSquareBracket="False" SpaceBetweenEmptySquareBrackets="False" SpaceWithinSquareBrackets="False" SpaceAfterColonInBaseTypeDeclaration="True" SpaceAfterComma="True" SpaceAfterDot="False" SpaceAfterSemicolonsInForStatement="True" SpaceBeforeColonInBaseTypeDeclaration="True" SpaceBeforeComma="False" SpaceBeforeDot="False" SpaceBeforeSemicolonsInForStatement="False" SpacingAroundBinaryOperator="Single" WrappingPreserveSingleLine="True" WrappingKeepStatementsOnSingleLine="True" PlaceSystemDirectiveFirst="True" SpaceAfterControlFlowStatementKeyword="False" scope="text/x-csharp" />
+          <CSharpFormattingPolicy IndentBlock="True" IndentBraces="False" IndentSwitchSection="True" IndentSwitchCaseSection="True" LabelPositioning="OneLess" NewLinesForBracesInTypes="True" NewLinesForBracesInMethods="True" NewLinesForBracesInProperties="True" NewLinesForBracesInAccessors="True" NewLinesForBracesInAnonymousMethods="True" NewLinesForBracesInControlBlocks="True" NewLinesForBracesInAnonymousTypes="True" NewLinesForBracesInObjectCollectionArrayInitializers="True" NewLinesForBracesInLambdaExpressionBody="True" NewLineForElse="True" NewLineForCatch="True" NewLineForFinally="True" SpacingAfterMethodDeclarationName="False" SpaceWithinMethodDeclarationParenthesis="False" SpaceBetweenEmptyMethodDeclarationParentheses="False" SpaceAfterMethodCallName="False" SpaceWithinMethodCallParentheses="False" SpaceBetweenEmptyMethodCallParentheses="False" SpaceAfterControlFlowStatementKeyword="False" SpaceWithinExpressionParentheses="False" SpaceWithinCastParentheses="False" SpaceWithinOtherParentheses="False" SpaceAfterCast="False" SpacesIgnoreAroundVariableDeclaration="False" SpaceBeforeOpenSquareBracket="False" SpaceBetweenEmptySquareBrackets="False" SpaceWithinSquareBrackets="False" SpaceAfterColonInBaseTypeDeclaration="True" SpaceAfterComma="True" SpaceAfterDot="False" SpaceAfterSemicolonsInForStatement="True" SpaceBeforeColonInBaseTypeDeclaration="True" SpaceBeforeComma="False" SpaceBeforeDot="False" SpaceBeforeSemicolonsInForStatement="False" SpacingAroundBinaryOperator="Single" WrappingPreserveSingleLine="True" WrappingKeepStatementsOnSingleLine="True" PlaceSystemDirectiveFirst="True" NewLineForMembersInObjectInit="True" NewLineForMembersInAnonymousTypes="True" NewLineForClausesInQuery="True" scope="text/x-csharp" />
           <DotNetNamingPolicy DirectoryNamespaceAssociation="PrefixedHierarchical" ResourceNamePolicy="MSBuild" />
           <StandardHeader IncludeInNewFiles="True" Text="/***************************************************************************&#xA;The Disc Image Chef&#xA;----------------------------------------------------------------------------&#xA; &#xA;Filename       : ${FileName}&#xA;Author(s)      : ${AuthorName} &lt;${AuthorEmail}&gt;&#xA;&#xA;Component      : Component&#xA; &#xA;--[ Description ] ----------------------------------------------------------&#xA; &#xA;    Description&#xA; &#xA;--[ License ] --------------------------------------------------------------&#xA; &#xA;    This library is free software; you can redistribute it and/or modify&#xA;    it under the terms of the GNU Lesser General Public License as&#xA;    published by the Free Software Foundation; either version 2.1 of the&#xA;    License, or (at your option) any later version.&#xA;&#xA;    This library is distributed in the hope that it will be useful, but&#xA;    WITHOUT ANY WARRANTY; without even the implied warranty of&#xA;    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU&#xA;    Lesser General Public License for more details.&#xA;&#xA;    You should have received a copy of the GNU Lesser General Public&#xA;    License along with this library; if not, see &lt;http://www.gnu.org/licenses/&gt;.&#xA;&#xA;----------------------------------------------------------------------------&#xA;Copyright © 2011-${Year} ${CopyrightHolder}&#xA;****************************************************************************/" />
         </Policies>

DiscImageChef.Filesystems/MicroDOS.cs

@@ -0,0 +1,238 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : MicroDOS.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Component
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Description
+//
+// --[ 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 © 2011-2017 Natalia Portillo
+// ****************************************************************************/
+
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Text;
+using DiscImageChef.CommonTypes;
+
+namespace DiscImageChef.Filesystems
+{
+    // Information from http://www.owg.ru/mkt/BK/MKDOS.TXT
+    // Thanks to tarlabnor for translating it
+    public class MicroDOS : Filesystem
+    {
+        const ushort magic = 0xA72E;
+        const ushort magic2 = 0x530C;
+
+        public MicroDOS()
+        {
+            Name = "MicroDOS file system";
+            PluginUUID = new Guid("9F9A364A-1A27-48A3-B730-7A7122000324");
+            CurrentEncoding = Encoding.GetEncoding("koi8-r");
+        }
+
+        public MicroDOS(ImagePlugins.ImagePlugin imagePlugin, Partition partition, Encoding encoding)
+        {
+            Name = "MicroDOS file system";
+            PluginUUID = new Guid("9F9A364A-1A27-48A3-B730-7A7122000324");
+            if(encoding == null)
+                CurrentEncoding = Encoding.GetEncoding("koi8-r");
+            else
+                CurrentEncoding = encoding;
+        }
+
+        public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, Partition partition)
+        {
+            if((1 + partition.Start) >= partition.End)
+                return false;
+
+            if(imagePlugin.GetSectorSize() < 512)
+                return false;
+
+            MicroDOSBlock0 block0 = new MicroDOSBlock0();
+
+            byte[] bk0 = imagePlugin.ReadSector(0 + partition.Start);
+
+            GCHandle handle = GCHandle.Alloc(bk0, GCHandleType.Pinned);
+            block0 = (MicroDOSBlock0)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(MicroDOSBlock0));
+            handle.Free();
+
+            return block0.label == magic && block0.mklabel == magic2;
+        }
+
+        public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, Partition partition, out string information)
+        {
+            information = "";
+
+            StringBuilder sb = new StringBuilder();
+            MicroDOSBlock0 block0 = new MicroDOSBlock0();
+
+            byte[] bk0 = imagePlugin.ReadSector(0 + partition.Start);
+
+            GCHandle handle = GCHandle.Alloc(bk0, GCHandleType.Pinned);
+            block0 = (MicroDOSBlock0)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(MicroDOSBlock0));
+            handle.Free();
+
+            sb.AppendLine("MicroDOS filesystem");
+            sb.AppendFormat("Volume has {0} blocks ({1} bytes)", block0.blocks, block0.blocks * 512).AppendLine();
+            sb.AppendFormat("Volume has {0} blocks used ({1} bytes)", block0.usedBlocks, block0.usedBlocks * 512).AppendLine();
+            sb.AppendFormat("Volume contains {0} files", block0.files).AppendLine();
+            sb.AppendFormat("First used block is {0}", block0.firstUsedBlock).AppendLine();
+
+            xmlFSType = new Schemas.FileSystemType
+            {
+                Type = "MicroDOS",
+                ClusterSize = 512,
+                Clusters = block0.blocks,
+                Files = block0.files,
+                FilesSpecified = true,
+                FreeClusters = block0.blocks - block0.usedBlocks,
+                FreeClustersSpecified = true
+            };
+
+            information = sb.ToString();
+        }
+
+        // Followed by directory entries
+        [StructLayout(LayoutKind.Sequential, Pack = 1)]
+        struct MicroDOSBlock0
+        {
+            /// <summary>BK starts booting here</summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 24)]
+            public byte[] bootCode;
+            /// <summary>Number of files in directory</summary>
+            public ushort files;
+            /// <summary>Total number of blocks in files of the directory</summary>
+            public ushort usedBlocks;
+            /// <summary>Unknown</summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 228)]
+            public byte[] unknown;
+            /// <summary>Ownership label (label that shows it belongs to Micro DOS format)</summary>
+            public ushort label;
+            /// <summary>MK-DOS directory format label</summary>
+            public ushort mklabel;
+            /// <summary>Unknown</summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 50)]
+            public byte[] unknown2;
+            /// <summary>Disk size in blocks (absolute value for the system unlike NORD, NORTON etc.) that
+            /// doesn't use two fixed values 40 or 80 tracks, but i.e. if you drive works with 76 tracks
+            /// this field will contain an appropriate number of blocks</summary>
+            public ushort blocks;
+            /// <summary> Number of the first file's block. Value is changable</summary>
+            public ushort firstUsedBlock;
+            /// <summary>Unknown</summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+            public byte[] unknown3;
+        }
+
+        [StructLayout(LayoutKind.Sequential, Pack = 1)]
+        struct DirectoryEntry
+        {
+            /// <summary>File status</summary>
+            public byte status;
+            /// <summary>Directory number (0 - root)</summary>
+            public byte directory;
+            /// <summary>File name 14. symbols in ASCII KOI8</summary>
+            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+            public byte[] filename;
+            /// <summary>Block number</summary>
+            public ushort blockNo;
+            /// <summary>Length in blocks</summary>
+            public ushort blocks;
+            /// <summary>Address</summary>
+            public ushort address;
+            /// <summary>Length</summary>
+            public ushort length;
+        }
+
+        enum FileStatus : byte
+        {
+            CommonFile = 0,
+            Protected = 1,
+            LogicalDisk = 2,
+            BadFile = 0x80,
+            Deleted = 0xFF
+        }
+
+        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<string> 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<string> 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;
+        }
+    }
+}

README.md

@@ -148,6 +148,7 @@ Supported file systems for identification and information only
 * Linux extended file system 3
 * Linux extended file system 4
 * Locus file system
+* MicroDOS file system
 * Microsoft 12-bit File Allocation Table (FAT12), including Atari ST extensions
 * Microsoft 16-bit File Allocation Table (FAT16)
 * Microsoft 32-bit File Allocation Table (FAT32), including FAT+ extension