/*
* This file is part of "JTA - Telnet/SSH for the JAVA(tm) platform".
*
* (c) Matthias L. Jugel, Marcus Meißner 1996-2005. All Rights Reserved.
*
* Please visit http://javatelnet.org/ for updates and contact.
*
* --LICENSE NOTICE--
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
* --LICENSE NOTICE--
*
*/
package de.mud.jta.plugin;
import de.mud.jta.Plugin;
import de.mud.jta.FilterPlugin;
import de.mud.jta.PluginBus;
import de.mud.jta.PluginConfig;
import de.mud.jta.event.LocalEchoRequest;
import de.mud.jta.event.SocketListener;
import de.mud.jta.event.ConfigurationListener;
import de.mud.jta.event.OnlineStatus;
// import java.io.InputStream;
// import java.io.OutputStream;
import java.io.IOException;
/**
* The shell plugin is the backend component for terminal emulation using
* a shell. It provides the i/o streams of the shell as data source.
* <P>
* <B>Maintainer:</B> Matthias L. Jugel
*
* @version $Id: Shell.java 499 2005-09-29 08:24:54Z leo $
* @author Matthias L. Jugel, Marcus Mei�ner, Pete Zaitcev
*/
public class Shell extends Plugin implements FilterPlugin {
protected String shellCommand;
private HandlerPTY pty;
public Shell(final PluginBus bus, final String id) {
super(bus, id);
bus.registerPluginListener(new ConfigurationListener() {
public void setConfiguration(PluginConfig cfg) {
String tmp;
if((tmp = cfg.getProperty("Shell", id, "command")) != null) {
shellCommand = tmp;
// System.out.println("Shell: Setting config " + tmp); // P3
} else {
// System.out.println("Shell: Not setting config"); // P3
shellCommand = "/bin/sh";
}
}
});
bus.registerPluginListener(new SocketListener() {
// we do actually ignore these parameters
public void connect(String host, int port) {
// XXX Fix this together with window size changes
// String ttype = (String)bus.broadcast(new TerminalTypeRequest());
// String ttype = getTerminalType();
// if(ttype == null) ttype = "dumb";
// XXX Add try around here to catch missing DLL/.so.
pty = new HandlerPTY();
if(pty.start(shellCommand) == 0) {
bus.broadcast(new OnlineStatus(true));
} else {
bus.broadcast(new OnlineStatus(false));
}
}
public void disconnect() {
bus.broadcast(new OnlineStatus(false));
pty = null;
}
});
}
public void setFilterSource(FilterPlugin plugin) {
// we do not have a source other than our socket
}
public FilterPlugin getFilterSource() {
return null;
}
public int read(byte[] b) throws IOException {
if(pty == null) return 0;
int ret = pty.read(b);
if(ret <= 0) {
throw new IOException("EOF on PTY");
}
return ret;
}
public void write(byte[] b) throws IOException {
if(pty != null) pty.write(b);
}
}