// JNI interface to slave process.// This is a part of Shell plugin.// If not for a static member, we'd have HandlerPTY private to Shell. XXX// HandlerPTY is meant to be robust, in a way that you can// instantiate it and work with it until it throws an exception,// then forget it. A finalizer takes care of file descriptors.package de.mud.jta.plugin;public class HandlerPTY {  public native int start(String cmd);	// open + fork/exec  public native void close();  public native int read(byte[] b);  public native int write(byte[] b);  private int fd;  boolean good = false;  static {    // System.loadLibrary("libutil");	// forkpty on Linux lives in libutil    System.loadLibrary("jtapty");  }  protected void finalize() throws Throwable {    super.finalize();    if(good) {      close();    }  }}