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Added Minix V1, V2 and V3 filesystems.
git-svn-id: svn://claunia.com/FileSystemIDandChk@18 17725271-3d32-4980-a8cb-9ff532f270ba
This commit is contained in:
@@ -1,3 +1,9 @@
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2012-08-05 Natalia Portillo <claunia@claunia.com>
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* Plugins/MinixFS.cs:
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* FileSystemIDandChk.csproj:
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Added Minix V1, V2 and V3 filesystems.
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2012-08-05 Natalia Portillo <claunia@claunia.com>
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* DateHandlers.cs:
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@@ -63,6 +63,7 @@
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<Compile Include="DateHandlers.cs" />
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<Compile Include="EndianAwareBinaryReader.cs" />
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<Compile Include="StringHandlers.cs" />
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<Compile Include="Plugins\MinixFS.cs" />
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</ItemGroup>
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<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
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<ItemGroup>
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231
FileSystemIDandChk/Plugins/MinixFS.cs
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231
FileSystemIDandChk/Plugins/MinixFS.cs
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@@ -0,0 +1,231 @@
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using System;
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using System.IO;
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using System.Text;
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using FileSystemIDandChk;
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// Information from Inside Macintosh
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namespace FileSystemIDandChk.Plugins
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{
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class MinixFS : Plugin
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{
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private const UInt16 MINIX_MAGIC = 0x137F; // Minix v1, 14 char filenames
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private const UInt16 MINIX_MAGIC2 = 0x138F; // Minix v1, 30 char filenames
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private const UInt16 MINIX2_MAGIC = 0x2468; // Minix v2, 14 char filenames
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private const UInt16 MINIX2_MAGIC2 = 0x2478; // Minix v2, 30 char filenames
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private const UInt16 MINIX3_MAGIC = 0x4D5A; // Minix v3, 60 char filenames
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// Byteswapped
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private const UInt16 MINIX_CIGAM = 0x7F13; // Minix v1, 14 char filenames
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private const UInt16 MINIX_CIGAM2 = 0x8F13; // Minix v1, 30 char filenames
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private const UInt16 MINIX2_CIGAM = 0x6824; // Minix v2, 14 char filenames
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private const UInt16 MINIX2_CIGAM2 = 0x7824; // Minix v2, 30 char filenames
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private const UInt16 MINIX3_CIGAM = 0x5A4D; // Minix v3, 60 char filenames
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public MinixFS(PluginBase Core)
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{
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base.Name = "Minix Filesystem";
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base.PluginUUID = new Guid("FE248C3B-B727-4AE5-A39F-79EA9A07D4B3");
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}
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public override bool Identify(FileStream stream, long offset)
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{
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UInt16 magic;
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BinaryReader br = new BinaryReader(stream);
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br.BaseStream.Seek(0x400 + 0x10 + offset, SeekOrigin.Begin); // Here should reside magic number on Minix V1 & V2
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magic = br.ReadUInt16();
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if(magic == MINIX_MAGIC || magic == MINIX_MAGIC2 || magic == MINIX2_MAGIC || magic == MINIX2_MAGIC2 ||
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magic == MINIX_CIGAM || magic == MINIX_CIGAM2 || magic == MINIX2_CIGAM || magic == MINIX2_CIGAM2)
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return true;
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else
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{
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br.BaseStream.Seek(0x400 + 0x18 + offset, SeekOrigin.Begin); // Here should reside magic number on Minix V1 & V2
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magic = br.ReadUInt16();
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if(magic == MINIX3_MAGIC || magic == MINIX3_CIGAM)
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return true;
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else
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return false;
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}
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}
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public override void GetInformation (FileStream stream, long offset, out string information)
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{
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information = "";
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StringBuilder sb = new StringBuilder();
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bool littleendian = true;
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bool minix3 = false;
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int filenamesize = 0;
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string minixVersion;
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UInt16 magic;
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EndianAwareBinaryReader eabr = new EndianAwareBinaryReader(stream, littleendian);
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eabr.BaseStream.Seek(0x400 + 0x18 + offset, SeekOrigin.Begin);
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magic = eabr.ReadUInt16();
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if(magic == MINIX3_MAGIC || magic == MINIX3_CIGAM)
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{
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filenamesize = 60;
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minixVersion = "Minix V3 filesystem";
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if(magic == MINIX3_CIGAM)
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littleendian = false;
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else
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littleendian = true;
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minix3 = true;
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}
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else
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{
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eabr.BaseStream.Seek(0x400 + 0x10 + offset, SeekOrigin.Begin);
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magic = eabr.ReadUInt16();
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switch(magic)
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{
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case MINIX_MAGIC:
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filenamesize = 14;
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minixVersion = "Minix V1 filesystem";
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littleendian = true;
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break;
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case MINIX_MAGIC2:
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filenamesize = 30;
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minixVersion = "Minix V1 filesystem";
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littleendian = true;
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break;
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case MINIX2_MAGIC:
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filenamesize = 14;
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minixVersion = "Minix V2 filesystem";
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littleendian = true;
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break;
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case MINIX2_MAGIC2:
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filenamesize = 30;
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minixVersion = "Minix V2 filesystem";
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littleendian = true;
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break;
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case MINIX_CIGAM:
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filenamesize = 14;
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minixVersion = "Minix V1 filesystem";
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littleendian = false;
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break;
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case MINIX_CIGAM2:
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filenamesize = 30;
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minixVersion = "Minix V1 filesystem";
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littleendian = false;
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break;
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case MINIX2_CIGAM:
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filenamesize = 14;
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minixVersion = "Minix V2 filesystem";
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littleendian = false;
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break;
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case MINIX2_CIGAM2:
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filenamesize = 30;
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minixVersion = "Minix V2 filesystem";
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littleendian = false;
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break;
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default:
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return;
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break;
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}
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}
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eabr = new EndianAwareBinaryReader(stream, littleendian);
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eabr.BaseStream.Seek(0x400 + offset, SeekOrigin.Begin);
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if(minix3)
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{
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Minix3SuperBlock mnx_sb = new Minix3SuperBlock();
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mnx_sb.s_ninodes = eabr.ReadUInt32();
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mnx_sb.s_pad0 = eabr.ReadUInt16();
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mnx_sb.s_imap_blocks = eabr.ReadUInt16();
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mnx_sb.s_zmap_blocks = eabr.ReadUInt16();
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mnx_sb.s_firstdatazone = eabr.ReadUInt16();
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mnx_sb.s_log_zone_size = eabr.ReadUInt16();
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mnx_sb.s_pad1 = eabr.ReadUInt16();
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mnx_sb.s_max_size = eabr.ReadUInt32();
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mnx_sb.s_zones = eabr.ReadUInt32();
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mnx_sb.s_magic = eabr.ReadUInt16();
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mnx_sb.s_pad2 = eabr.ReadUInt16();
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mnx_sb.s_blocksize = eabr.ReadUInt16();
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mnx_sb.s_disk_version = eabr.ReadByte();
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sb.AppendLine(minixVersion);
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sb.AppendFormat("{0} chars in filename", filenamesize).AppendLine();
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sb.AppendFormat("{0} zones on volume ({1} bytes)", mnx_sb.s_zones, mnx_sb.s_zones*mnx_sb.s_blocksize).AppendLine();
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sb.AppendFormat("{0} bytes/block", mnx_sb.s_blocksize).AppendLine();
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sb.AppendFormat("{0} inodes on volume", mnx_sb.s_ninodes).AppendLine();
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sb.AppendFormat("{0} blocks on inode map ({1} bytes)", mnx_sb.s_imap_blocks, mnx_sb.s_imap_blocks*mnx_sb.s_blocksize).AppendLine();
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sb.AppendFormat("{0} blocks on zone map ({1} bytes)", mnx_sb.s_zmap_blocks, mnx_sb.s_zmap_blocks*mnx_sb.s_blocksize).AppendLine();
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sb.AppendFormat("First data zone: {0}", mnx_sb.s_firstdatazone).AppendLine();
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//sb.AppendFormat("log2 of blocks/zone: {0}", mnx_sb.s_log_zone_size).AppendLine(); // Apparently 0
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sb.AppendFormat("{0} bytes maximum per file", mnx_sb.s_max_size).AppendLine();
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sb.AppendFormat("On-disk filesystem version: {0}", mnx_sb.s_disk_version).AppendLine();
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}
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else
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{
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MinixSuperBlock mnx_sb = new MinixSuperBlock();
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mnx_sb.s_ninodes = eabr.ReadUInt16();
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mnx_sb.s_nzones = eabr.ReadUInt16();
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mnx_sb.s_imap_blocks = eabr.ReadUInt16();
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mnx_sb.s_zmap_blocks = eabr.ReadUInt16();
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mnx_sb.s_firstdatazone = eabr.ReadUInt16();
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mnx_sb.s_log_zone_size = eabr.ReadUInt16();
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mnx_sb.s_max_size = eabr.ReadUInt32();
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mnx_sb.s_magic = eabr.ReadUInt16();
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mnx_sb.s_state = eabr.ReadUInt16();
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mnx_sb.s_zones = eabr.ReadUInt32();
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sb.AppendLine(minixVersion);
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sb.AppendFormat("{0} chars in filename", filenamesize).AppendLine();
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if(mnx_sb.s_zones > 0) // On V2
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sb.AppendFormat("{0} zones on volume ({1} bytes)", mnx_sb.s_zones, mnx_sb.s_zones*1024).AppendLine();
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else
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sb.AppendFormat("{0} zones on volume ({1} bytes)", mnx_sb.s_nzones, mnx_sb.s_nzones*1024).AppendLine();
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sb.AppendFormat("{0} inodes on volume", mnx_sb.s_ninodes).AppendLine();
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sb.AppendFormat("{0} blocks on inode map ({1} bytes)", mnx_sb.s_imap_blocks, mnx_sb.s_imap_blocks*1024).AppendLine();
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sb.AppendFormat("{0} blocks on zone map ({1} bytes)", mnx_sb.s_zmap_blocks, mnx_sb.s_zmap_blocks*1024).AppendLine();
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sb.AppendFormat("First data zone: {0}", mnx_sb.s_firstdatazone).AppendLine();
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//sb.AppendFormat("log2 of blocks/zone: {0}", mnx_sb.s_log_zone_size).AppendLine(); // Apparently 0
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sb.AppendFormat("{0} bytes maximum per file", mnx_sb.s_max_size).AppendLine();
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sb.AppendFormat("Filesystem state: {0:X4}", mnx_sb.s_state).AppendLine();
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}
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information = sb.ToString();
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}
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public struct MinixSuperBlock
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{
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public UInt16 s_ninodes; // 0x00, inodes on volume
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public UInt16 s_nzones; // 0x02, zones on volume
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public UInt16 s_imap_blocks; // 0x04, blocks on inode map
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public UInt16 s_zmap_blocks; // 0x06, blocks on zone map
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public UInt16 s_firstdatazone; // 0x08, first data zone
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public UInt16 s_log_zone_size; // 0x0A, log2 of blocks/zone
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public UInt32 s_max_size; // 0x0C, max file size
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public UInt16 s_magic; // 0x10, magic
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public UInt16 s_state; // 0x12, filesystem state
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public UInt32 s_zones; // 0x14, number of zones
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}
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public struct Minix3SuperBlock
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{
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public UInt32 s_ninodes; // 0x00, inodes on volume
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public UInt16 s_pad0; // 0x04, padding
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public UInt16 s_imap_blocks; // 0x06, blocks on inode map
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public UInt16 s_zmap_blocks; // 0x08, blocks on zone map
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public UInt16 s_firstdatazone; // 0x0A, first data zone
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public UInt16 s_log_zone_size; // 0x0C, log2 of blocks/zone
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public UInt16 s_pad1; // 0x0E, padding
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public UInt32 s_max_size; // 0x10, max file size
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public UInt32 s_zones; // 0x14, number of zones
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public UInt16 s_magic; // 0x18, magic
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public UInt16 s_pad2; // 0x1A, padding
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public UInt16 s_blocksize; // 0x1C, bytes in a block
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public byte s_disk_version; // 0x1E, on-disk structures version
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}
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}
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}
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