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Adds support for Professional File System, closes #35
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300
DiscImageChef.Filesystems/PFS.cs
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300
DiscImageChef.Filesystems/PFS.cs
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// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : AmigaDOS.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Amiga Fast File System plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the Professional File System and shows information.
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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 © 2011-2016 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Text;
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using System.Collections.Generic;
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using DiscImageChef.Console;
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using System.Runtime.InteropServices;
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namespace DiscImageChef.Filesystems
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{
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class PFS : Filesystem
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{
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public PFS()
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{
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Name = "Professional File System";
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PluginUUID = new Guid("68DE769E-D957-406A-8AE4-3781CA8CDA77");
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}
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public PFS(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd)
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{
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Name = "Professional File System";
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PluginUUID = new Guid("68DE769E-D957-406A-8AE4-3781CA8CDA77");
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}
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/// <summary>
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/// Boot block, first 2 sectors
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/// </summary>
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct BootBlock
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{
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/// <summary>
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/// "PFS\1" disk type
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/// </summary>
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public uint diskType;
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/// <summary>
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/// Boot code, til completion
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/// </summary>
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public byte[] bootCode;
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct RootBlock
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{
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/// <summary>
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/// Disk type
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/// </summary>
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public uint diskType;
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/// <summary>
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/// Options
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/// </summary>
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public uint options;
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/// <summary>
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/// Current datestamp
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/// </summary>
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public uint datestamp;
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/// <summary>
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/// Volume creation day
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/// </summary>
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public ushort creationday;
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/// <summary>
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/// Volume creation minute
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/// </summary>
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public ushort creationminute;
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/// <summary>
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/// Volume creation tick
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/// </summary>
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public ushort creationtick;
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/// <summary>
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/// AmigaDOS protection bits
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/// </summary>
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public ushort protection;
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/// <summary>
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/// Volume label (Pascal string)
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/// </summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
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public byte[] diskname;
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/// <summary>
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/// Last reserved block
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/// </summary>
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public uint lastreserved;
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/// <summary>
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/// First reserved block
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/// </summary>
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public uint firstreserved;
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/// <summary>
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/// Free reserved blocks
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/// </summary>
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public uint reservedfree;
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/// <summary>
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/// Size of reserved blocks in bytes
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/// </summary>
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public ushort reservedblocksize;
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/// <summary>
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/// Blocks in rootblock, including bitmap
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/// </summary>
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public ushort rootblockclusters;
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/// <summary>
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/// Free blocks
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/// </summary>
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public uint blocksfree;
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/// <summary>
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/// Blocks that must be always free
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/// </summary>
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public uint alwaysfree;
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/// <summary>
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/// Current bitmapfield number for allocation
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/// </summary>
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public uint rovingPointer;
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/// <summary>
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/// Pointer to deldir
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/// </summary>
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public uint delDirPtr;
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/// <summary>
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/// Disk size in sectors
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/// </summary>
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public uint diskSize;
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/// <summary>
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/// Rootblock extension
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/// </summary>
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public uint extension;
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/// <summary>
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/// Unused
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/// </summary>
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public uint unused;
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}
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/// <summary>
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/// Identifier for AFS (PFS v1)
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/// </summary>
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const uint AFS_DISK = 0x41465301;
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/// <summary>
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/// Identifier for PFS v2
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/// </summary>
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const uint PFS2_DISK = 0x50465302;
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/// <summary>
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/// Identifier for PFS v3
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/// </summary>
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const uint PFS_DISK = 0x50465301;
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/// <summary>
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/// Identifier for multi-user AFS
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/// </summary>
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const uint MUAF_DISK = 0x6D754146;
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/// <summary>
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/// Identifier for multi-user PFS
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/// </summary>
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const uint MUPFS_DISK = 0x6D755046;
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public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd)
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{
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if(partitionStart >= partitionEnd)
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return false;
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BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
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byte[] sector = imagePlugin.ReadSector(2 + partitionStart);
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uint magic = BigEndianBitConverter.ToUInt32(sector, 0x00);
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return magic == AFS_DISK || magic == PFS2_DISK || magic == PFS_DISK || magic == MUAF_DISK || magic == MUPFS_DISK;
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}
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public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd, out string information)
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{
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byte[] RootBlockSector = imagePlugin.ReadSector(2 + partitionStart);
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RootBlock rootBlock = new RootBlock();
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rootBlock = BigEndianMarshal.ByteArrayToStructureBigEndian<RootBlock>(RootBlockSector);
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StringBuilder sbInformation = new StringBuilder();
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xmlFSType = new Schemas.FileSystemType();
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switch(rootBlock.diskType)
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{
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case AFS_DISK:
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case MUAF_DISK:
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sbInformation.Append("Professional File System v1");
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xmlFSType.Type = "PFS v1";
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break;
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case PFS2_DISK:
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sbInformation.Append("Professional File System v2");
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xmlFSType.Type = "PFS v2";
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break;
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case PFS_DISK:
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case MUPFS_DISK:
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sbInformation.Append("Professional File System v3");
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xmlFSType.Type = "PFS v3";
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break;
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}
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if(rootBlock.diskType == MUAF_DISK || rootBlock.diskType == MUPFS_DISK)
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sbInformation.Append(", with multi-user support");
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sbInformation.AppendLine();
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sbInformation.AppendFormat("Volume name: {0}", StringHandlers.PascalToString(rootBlock.diskname)).AppendLine();
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sbInformation.AppendFormat("Volume has {0} free sectors of {1}", rootBlock.blocksfree, rootBlock.diskSize).AppendLine();
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sbInformation.AppendFormat("Volme created on {0}", DateHandlers.AmigaToDateTime(rootBlock.creationday, rootBlock.creationminute, rootBlock.creationtick)).AppendLine();
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if(rootBlock.extension > 0)
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sbInformation.AppendFormat("Root block extension resides at block {0}", rootBlock.extension).AppendLine();
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information = sbInformation.ToString();
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xmlFSType.CreationDate = DateHandlers.AmigaToDateTime(rootBlock.creationday, rootBlock.creationminute, rootBlock.creationtick);
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xmlFSType.CreationDateSpecified = true;
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xmlFSType.FreeClusters = rootBlock.blocksfree;
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xmlFSType.FreeClustersSpecified = true;
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xmlFSType.Clusters = rootBlock.diskSize / imagePlugin.GetSectorSize();
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xmlFSType.ClusterSize = (int)imagePlugin.GetSectorSize();
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}
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public override Errno Mount()
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{
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return Errno.NotImplemented;
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}
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public override Errno Mount(bool debug)
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{
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return Errno.NotImplemented;
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}
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public override Errno Unmount()
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{
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return Errno.NotImplemented;
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}
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public override Errno MapBlock(string path, long fileBlock, ref long deviceBlock)
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{
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return Errno.NotImplemented;
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}
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public override Errno GetAttributes(string path, ref FileAttributes attributes)
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{
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return Errno.NotImplemented;
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}
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public override Errno ListXAttr(string path, ref List<string> xattrs)
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{
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return Errno.NotImplemented;
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}
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public override Errno GetXattr(string path, string xattr, ref byte[] buf)
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{
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return Errno.NotImplemented;
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}
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public override Errno Read(string path, long offset, long size, ref byte[] buf)
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{
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return Errno.NotImplemented;
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}
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public override Errno ReadDir(string path, ref List<string> contents)
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{
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return Errno.NotImplemented;
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}
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public override Errno StatFs(ref FileSystemInfo stat)
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{
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return Errno.NotImplemented;
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}
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public override Errno Stat(string path, ref FileEntryInfo stat)
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{
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return Errno.NotImplemented;
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}
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public override Errno ReadLink(string path, ref string dest)
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{
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return Errno.NotImplemented;
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}
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}
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}
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