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* UNIXBFS.cs:

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* FileSystemIDandChk.csproj: Added UNIX Boot filesystem.

* FAT.cs: Don't seek to FAT if value is bigger than volume size.

git-svn-id: svn://claunia.com/FileSystemIDandChk@21 17725271-3d32-4980-a8cb-9ff532f270ba
This commit is contained in:
Natalia Portillo
2012-08-06 21:21:14 +00:00
parent 12a475d1ad
commit 6d0709537d
4 changed files with 101 additions and 1 deletions
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5
FileSystemIDandChk/Plugins/FAT.cs
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@@ -39,7 +39,10 @@ namespace FileSystemIDandChk.Plugins
rsectors = br.ReadUInt16();
if(rsectors==0)
rsectors=1;
br.BaseStream.Seek(bps*rsectors + offset, SeekOrigin.Begin); // First FAT entry
if((ulong)br.BaseStream.Length > (ulong)(bps*rsectors + offset))
br.BaseStream.Seek(bps*rsectors + offset, SeekOrigin.Begin); // First FAT entry
else
return false;
first_fat_entry = br.ReadUInt32(); // Easier to manage
if(MainClass.isDebug)

87
FileSystemIDandChk/Plugins/UNIXBFS.cs Normal file
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@@ -0,0 +1,87 @@
using System;
using System.IO;
using System.Text;
using FileSystemIDandChk;
namespace FileSystemIDandChk.Plugins
{
class BFS : Plugin
{
private const UInt32 BFS_MAGIC = 0x1BADFACE;
public BFS(PluginBase Core)
{
base.Name = "UNIX Boot filesystem";
base.PluginUUID = new Guid("1E6E0DA6-F7E4-494C-80C6-CB5929E96155");
}
public override bool Identify(FileStream stream, long offset)
{
UInt32 magic;
BinaryReader br = new BinaryReader(stream);
br.BaseStream.Seek(offset, SeekOrigin.Begin);
magic = br.ReadUInt32();
if(magic == BFS_MAGIC)
return true;
else
return false;
}
public override void GetInformation (FileStream stream, long offset, out string information)
{
information = "";
StringBuilder sb = new StringBuilder();
BinaryReader br = new BinaryReader(stream);
BFSSuperBlock bfs_sb = new BFSSuperBlock();
br.BaseStream.Seek(offset, SeekOrigin.Begin);
bfs_sb.s_magic = br.ReadUInt32();
bfs_sb.s_start = br.ReadUInt32();
bfs_sb.s_end = br.ReadUInt32();
bfs_sb.s_from = br.ReadUInt32();
bfs_sb.s_to = br.ReadUInt32();
bfs_sb.s_bfrom = br.ReadInt32();
bfs_sb.s_bto = br.ReadInt32();
bfs_sb.s_fsname = StringHandlers.CToString(br.ReadBytes(6));
bfs_sb.s_volume = StringHandlers.CToString(br.ReadBytes(6));
if(MainClass.isDebug)
{
Console.WriteLine("(BFS) bfs_sb.s_magic: 0x{0:X8}", bfs_sb.s_magic);
Console.WriteLine("(BFS) bfs_sb.s_start: 0x{0:X8}", bfs_sb.s_start);
Console.WriteLine("(BFS) bfs_sb.s_end: 0x{0:X8}", bfs_sb.s_end);
Console.WriteLine("(BFS) bfs_sb.s_from: 0x{0:X8}", bfs_sb.s_from);
Console.WriteLine("(BFS) bfs_sb.s_to: 0x{0:X8}", bfs_sb.s_to);
Console.WriteLine("(BFS) bfs_sb.s_bfrom: 0x{0:X8}", bfs_sb.s_bfrom);
Console.WriteLine("(BFS) bfs_sb.s_bto: 0x{0:X8}", bfs_sb.s_bto);
Console.WriteLine("(BFS) bfs_sb.s_fsname: 0x{0}", bfs_sb.s_fsname);
Console.WriteLine("(BFS) bfs_sb.s_volume: 0x{0}", bfs_sb.s_volume);
}
sb.AppendLine("UNIX Boot filesystem");
sb.AppendFormat("Volume goes from byte {0} to byte {1}, for {2} bytes", bfs_sb.s_start, bfs_sb.s_end, bfs_sb.s_end-bfs_sb.s_start).AppendLine();
sb.AppendFormat("Filesystem name: {0}", bfs_sb.s_fsname).AppendLine();
sb.AppendFormat("Volume name: {0}", bfs_sb.s_volume).AppendLine();
information = sb.ToString();
}
private struct BFSSuperBlock
{
public UInt32 s_magic; // 0x00, 0x1BADFACE
public UInt32 s_start; // 0x04, start in bytes of volume
public UInt32 s_end; // 0x08, end in bytes of volume
public UInt32 s_from; // 0x0C, unknown :p
public UInt32 s_to; // 0x10, unknown :p
public Int32 s_bfrom; // 0x14, unknown :p
public Int32 s_bto; // 0x18, unknown :p
public string s_fsname; // 0x1C, 6 bytes, filesystem name
public string s_volume; // 0x22, 6 bytes, volume name
}
}
}