com.jcraft.weirdx.XRexec.java Source code

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Here is the source code for com.jcraft.weirdx.XRexec.java

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/* -*-mode:java; c-basic-offset:2; -*- */
/* WeirdX - wrapper for JRexec.
 *
 * Copyright (C) 1999-2004 JCraft, Inc.
 *
 * 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.
 */

package com.jcraft.weirdx;

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

import com.jcraft.util.*;

//import com.sun.java.swing.*;
import javax.swing.*;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class XRexec implements ActionListener {
    private static Log LOG = LogFactory.getLog(XRexec.class);

    private final JTextField name = new JTextField(8);
    private final JTextField host = new JTextField(20);
    private final JPasswordField passwd = new JPasswordField(8);
    private final JTextField command = new JTextField(20);
    private final JButton rexec = new JButton("REXEC");

    private String display = "localhost:2.0";

    public XRexec(String myName, int num) {
        try {
            InetAddress local = null;
            if (myName != null && myName.length() > 0) {
                local = InetAddress.getByName(myName);
            } else {
                local = InetAddress.getLocalHost();
            }
            display = local.getHostName() + ":" + num + ".0";
        } catch (Exception e) {
            display = "localhost:" + num + ".0";
            LOG.error(e);
        }

        JFrame jframe = new JFrame();
        Container cpane = jframe.getContentPane();
        cpane.setLayout(new GridLayout(0, 1));

        JPanel jpanel = null;

        jpanel = new JPanel();
        jpanel.setBorder(BorderFactory.createTitledBorder("Host"));
        jpanel.setLayout(new BorderLayout());
        host.setText("");
        host.setMinimumSize(new Dimension(50, 25));
        host.setEditable(true);
        jpanel.add(host, "Center");
        cpane.add(jpanel);

        jpanel = new JPanel();
        jpanel.setBorder(BorderFactory.createTitledBorder("User"));
        jpanel.setLayout(new BorderLayout());
        name.setText("");
        name.setMinimumSize(new Dimension(50, 25));
        name.setEditable(true);
        jpanel.add(name, "Center");
        cpane.add(jpanel);

        jpanel = new JPanel();
        jpanel.setBorder(BorderFactory.createTitledBorder("Password"));
        jpanel.setLayout(new BorderLayout());
        passwd.setMinimumSize(new Dimension(50, 25));
        passwd.setEditable(true);
        jpanel.add(passwd, "Center");
        cpane.add(jpanel);

        jpanel = new JPanel();
        jpanel.setBorder(BorderFactory.createTitledBorder("Command with Absolute Path"));
        jpanel.setLayout(new BorderLayout());
        command.setText("");
        command.setMinimumSize(new Dimension(50, 25));
        command.setEditable(true);
        jpanel.add(command, "Center");
        command.addActionListener(this);
        cpane.add(jpanel);

        jpanel = new JPanel();
        jpanel.add(rexec, "Center");
        rexec.addActionListener(this);
        cpane.add(jpanel);

        jframe.pack();
        jframe.setVisible(true);
    }

    @SuppressWarnings("unused")
    public static void main(String[] arg) {
        XRexec xsh = new XRexec(null, 2);
    }

    public void actionPerformed(java.awt.event.ActionEvent e) {
        char[] pass = null;
        try {
            pass = passwd.getPassword();
        } catch (Exception ee) {
        }
        if (name.getText().length() == 0 || host.getText().length() == 0 || pass == null || pass.length == 0
                || command.getText().length() == 0) {
            return;
        }

        try {
            String xcommand = null;

            xcommand = "exec /bin/csh -cf \"setenv DISPLAY " + display + "; exec " + command.getText()
                    + "  < /dev/null >>& /dev/null \"";

            JRexec jrexec = new JRexec(name.getText(), host.getText(), new String(pass), xcommand);

            for (int i = 0; i < pass.length; i++) {
                pass[i] = (char) 0;
            }

            InputStream in = jrexec.getResult();

            jrexec.doit();

            byte[] b = new byte[1];
            in.read(b, 0, 1); // success??

            byte[] buf = new byte[1024];
            while (true) {
                int len = in.read(buf, 0, buf.length);
                if (len == -1)
                    break;
                if (len == 0)
                    break;
                //   System.out.print(new String(buf, 0, len));
            }
            jrexec.close();
        } catch (Exception ee) {
            LOG.error(ee);
        }
    }
}