MirrorFsOperation.cs

using System;
using System.IO;
using System.Collections;
using Dokan;

namespace DokaNetMirror{
	class Mirror:DokanOperations{
		private string root_;
		private int count_;

		public Mirror(string root){
			root_=root;
			count_=1;
		}

		private string GetPath(string filename){
			string path=root_+filename;
			Console.Error.WriteLine("GetPath : {0}",path);
			return path;
		}

		public int CreateFile(String filename,FileAccess access,FileShare share,
			FileMode mode,FileOptions options,DokanFileInfo info){
			string path=GetPath(filename);
			info.Context=count_++;
			if (File.Exists(path)){
				return 0;
			}else if(Directory.Exists(path)){
				info.IsDirectory=true;
				return 0;
			}else{
				return -DokanNet.ERROR_FILE_NOT_FOUND;
			}
		}

		public int OpenDirectory(String filename,DokanFileInfo info){
			info.Context=count_++;
			if (Directory.Exists(GetPath(filename)))
				return 0;
			else
				return -DokanNet.ERROR_PATH_NOT_FOUND;
		}

		public int CreateDirectory(String filename,DokanFileInfo info){
			return -1;
		}

		public int Cleanup(String filename,DokanFileInfo info){
			//Console.WriteLine("%%%%%% count={0}",info.Context);
			return 0;
		}

		public int CloseFile(String filename,DokanFileInfo info){
			return 0;
		}

		public int ReadFile(String filename,Byte[] buffer,ref uint readBytes,
			long offset,DokanFileInfo info){
			try{
				FileStream fs=File.OpenRead(GetPath(filename));
				fs.Seek(offset,SeekOrigin.Begin);
				readBytes=(uint)fs.Read(buffer,0,buffer.Length);
				return 0;
			}catch(Exception){
				return -1;
			}
		}

		public int WriteFile(String filename,Byte[] buffer,ref uint writtenBytes,long offset,DokanFileInfo info){
			return -1;
		}

		public int FlushFileBuffers(String filename,DokanFileInfo info){
			return -1;
		}

		public int GetFileInformation(String filename,FileInformation fileinfo,DokanFileInfo info){
			string path=GetPath(filename);
			if (File.Exists(path)){
				FileInfo f=new FileInfo(path);

				fileinfo.Attributes=f.Attributes;
				fileinfo.CreationTime=f.CreationTime;
				fileinfo.LastAccessTime=f.LastAccessTime;
				fileinfo.LastWriteTime=f.LastWriteTime;
				fileinfo.Length=f.Length;
				return 0;
			}else if (Directory.Exists(path)){
				DirectoryInfo f=new DirectoryInfo(path);

				fileinfo.Attributes=f.Attributes;
				fileinfo.CreationTime=f.CreationTime;
				fileinfo.LastAccessTime=f.LastAccessTime;
				fileinfo.LastWriteTime=f.LastWriteTime;
				fileinfo.Length=0;// f.Length;
				return 0;
			}else{
				return -1;
			}
		}

		public int FindFiles(String filename,ArrayList files,DokanFileInfo info){
			string path=GetPath(filename);
			if (Directory.Exists(path)){
				DirectoryInfo d=new DirectoryInfo(path);
				FileSystemInfo[] entries=d.GetFileSystemInfos();
				foreach (FileSystemInfo f in entries){
					FileInformation fi=new FileInformation();
					fi.Attributes=f.Attributes;
					fi.CreationTime=f.CreationTime;
					fi.LastAccessTime=f.LastAccessTime;
					fi.LastWriteTime=f.LastWriteTime;
					fi.Length=(f is DirectoryInfo) ? 0 : ((FileInfo)f).Length;
					fi.FileName=f.Name;
					files.Add(fi);
				}
				return 0;
			}else{
				return -1;
			}
		}

		public int SetFileAttributes(String filename,FileAttributes attr,DokanFileInfo info){
			return -1;
		}

		public int SetFileTime(String filename,DateTime ctime,
				DateTime atime,DateTime mtime,DokanFileInfo info){
			return -1;
		}

		public int DeleteFile(String filename,DokanFileInfo info){
			return -1;
		}

		public int DeleteDirectory(String filename,DokanFileInfo info){
			return -1;
		}

		public int MoveFile(String filename,String newname,bool replace,DokanFileInfo info){
			return -1;
		}

		public int SetEndOfFile(String filename,long length,DokanFileInfo info){
			return -1;
		}

		public int SetAllocationSize(String filename,long length,DokanFileInfo info){
			return -1;
		}

		public int LockFile(String filename,long offset,long length,DokanFileInfo info){
			return 0;
		}

		public int UnlockFile(String filename,long offset,long length,DokanFileInfo info){
			return 0;
		}

		public int GetDiskFreeSpace(ref ulong freeBytesAvailable,ref ulong totalBytes,
			ref ulong totalFreeBytes,DokanFileInfo info){
			freeBytesAvailable=512 * 1024 * 1024;
			totalBytes=1024 * 1024 * 1024;
			totalFreeBytes=512 * 1024 * 1024;
			return 0;
		}

		public int Unmount(DokanFileInfo info){
			return 0;
		}

		static void Main(string[] args){
			DokanOptions opt=new DokanOptions();
			opt.DebugMode=true;
			opt.DriveLetter='n';
			opt.ThreadCount=5;
			DokanNet.DokanMain(opt,new Mirror("C:"));
		}
	}
}