public Directory(Context context, Inode inode, MetadataRef inodeRef)
: base(context, inode, inodeRef)
{
_dirInode = inode as IDirectoryInode;
if (_dirInode == null)
{
throw new ArgumentException("Inode is not a directory", "inode");
}
}
public UnixFileSystemInfo GetUnixFileInfo(string path)
{
File file = GetFile(path);
Inode inode = file.Inode;
DeviceInode devInod = inode as DeviceInode;
UnixFileSystemInfo info = new UnixFileSystemInfo()
{
FileType = FileTypeFromInodeType(inode.Type),
UserId = GetId(inode.UidKey),
GroupId = GetId(inode.GidKey),
Permissions = (UnixFilePermissions)inode.Mode,
Inode = inode.InodeNumber,
LinkCount = inode.NumLinks,
DeviceId = (devInod == null) ? 0 : devInod.DeviceId
};
return(info);
}
protected override File ConvertDirEntryToFile(DirectoryEntry dirEntry)
{
MetadataRef inodeRef = dirEntry.InodeReference;
_context.InodeReader.SetPosition(inodeRef);
Inode inode = Inode.Read(_context.InodeReader);
if (dirEntry.IsSymlink)
{
return(new Symlink(_context, inode, inodeRef));
}
else if (dirEntry.IsDirectory)
{
return(new Directory(_context, inode, inodeRef));
}
else
{
return(new File(_context, inode, inodeRef));
}
}
public static Inode Read(MetablockReader inodeReader)
{
byte[] typeData = new byte[2];
if (inodeReader.Read(typeData, 0, 2) != 2)
{
throw new IOException("Unable to read Inode type");
}
InodeType type = (InodeType)Utilities.ToUInt16LittleEndian(typeData, 0);
Inode inode = InstantiateType(type);
byte[] inodeData = new byte[inode.Size];
inodeData[0] = typeData[0];
inodeData[1] = typeData[1];
if (inodeReader.Read(inodeData, 2, inode.Size - 2) != inode.Size - 2)
{
throw new IOException("Unable to read whole Inode");
}
inode.ReadFrom(inodeData, 0);
return(inode);
}
public File(Context context, Inode inode, MetadataRef inodeRef)
{
_context = context;
_inode = inode;
_inodeRef = inodeRef;
}
public Symlink(Context context, Inode inode, MetadataRef inodeRef)
: base(context, inode, inodeRef)
{
}
public VfsSquashFileSystemReader(Stream stream)
: base(new DiscFileSystemOptions())
{
_context = new Context();
_context.SuperBlock = new SuperBlock();
_context.RawStream = stream;
// Read superblock
stream.Position = 0;
byte[] buffer = Utilities.ReadFully(stream, _context.SuperBlock.Size);
_context.SuperBlock.ReadFrom(buffer, 0);
if (_context.SuperBlock.Magic != SuperBlock.SquashFsMagic)
{
throw new IOException("Invalid SquashFS filesystem - magic mismatch");
}
if (_context.SuperBlock.Compression != 1)
{
throw new IOException("Unsupported compression used");
}
if (_context.SuperBlock.ExtendedAttrsTableStart != -1)
{
throw new IOException("Unsupported extended attributes present");
}
if (_context.SuperBlock.MajorVersion != 4)
{
throw new IOException("Unsupported file system version: " + _context.SuperBlock.MajorVersion + "." + _context.SuperBlock.MinorVersion);
}
// Create block caches, used to reduce the amount of I/O and decompression activity.
_blockCache = new BlockCache <Block>((int)_context.SuperBlock.BlockSize, 20);
_metablockCache = new BlockCache <Metablock>(MetadataBufferSize, 20);
_context.ReadBlock = ReadBlock;
_context.ReadMetaBlock = ReadMetaBlock;
_context.InodeReader = new MetablockReader(_context, _context.SuperBlock.InodeTableStart);
_context.DirectoryReader = new MetablockReader(_context, _context.SuperBlock.DirectoryTableStart);
if (_context.SuperBlock.FragmentTableStart != -1)
{
_context.FragmentTableReaders = LoadIndirectReaders(
_context.SuperBlock.FragmentTableStart,
(int)_context.SuperBlock.FragmentsCount,
FragmentRecord.RecordSize);
}
if (_context.SuperBlock.UidGidTableStart != -1)
{
_context.UidGidTableReaders = LoadIndirectReaders(
_context.SuperBlock.UidGidTableStart,
_context.SuperBlock.UidGidCount,
4);
}
// Bootstrap the root directory
_context.InodeReader.SetPosition(_context.SuperBlock.RootInode);
DirectoryInode dirInode = (DirectoryInode)Inode.Read(_context.InodeReader);
RootDirectory = new Directory(_context, dirInode, _context.SuperBlock.RootInode);
}
public File(Context context, Inode inode, MetadataRef inodeRef)
{
_context = context;
_inode = inode;
_inodeRef = inodeRef;
}
