public LocalFileSystem() 
{
    
    super(new RawLocalFileSystem());
}

 public LocalFileSystem(FileSystem rawLocalFileSystem) 
{
    super(rawLocalFileSystem);
}

 public  void copyFromLocalFile(boolean delSrc,
    Path src,
    Path dst) throws IOException 
{
    FileUtil.copy(this, src, this, dst, delSrc, getConf());
}

 public  void copyToLocalFile(boolean delSrc,
    Path src,
    Path dst) throws IOException 
{
    FileUtil.copy(this, src, this, dst, delSrc, getConf());
}

 public File pathToFile(Path path) 
{
    return ((RawLocalFileSystem)fs).pathToFile(path);
}

Convert a path to a File.

 public boolean reportChecksumFailure(Path p,
    FSDataInputStream in,
    long inPos,
    FSDataInputStream sums,
    long sumsPos) 
{
    try {
      // canonicalize f
      File f = ((RawLocalFileSystem)fs).pathToFile(p).getCanonicalFile();
      // find highest writable parent dir of f on the same device
      String device = new DF(f, getConf()).getMount();
      File parent = f.getParentFile();
      File dir = null;
      while (parent!=null && parent.canWrite() && parent.toString().startsWith(device)) {
        dir = parent;
        parent = parent.getParentFile();
      }
      if (dir==null) {
        throw new IOException(
                              "not able to find the highest writable parent dir");
      }
      // move the file there
      File badDir = new File(dir, "bad_files");
      if (!badDir.mkdirs()) {
        if (!badDir.isDirectory()) {
          throw new IOException("Mkdirs failed to create " + badDir.toString());
        }
      }
      String suffix = "." + rand.nextInt();
      File badFile = new File(badDir, f.getName()+suffix);
      LOG.warn("Moving bad file " + f + " to " + badFile);
      in.close();                               // close it first
      f.renameTo(badFile);                      // rename it
      // move checksum file too
      File checkFile = ((RawLocalFileSystem)fs).pathToFile(getChecksumFile(p));
      checkFile.renameTo(new File(badDir, checkFile.getName()+suffix));
    } catch (IOException e) {
      LOG.warn("Error moving bad file " + p + ": " + e);
    }
    return false;
}

Moves files to a bad file directory on the same device, so that their storage will not be reused.