ShellSignalHandler.java example

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/*
 * NOTE: This copyright does *not* cover user programs that use HQ
 * program services by normal system calls through the application
 * program interfaces provided as part of the Hyperic Plug-in Development
 * Kit or the Hyperic Client Development Kit - this is merely considered
 * normal use of the program, and does *not* fall under the heading of
 * "derived work".
 * 
 * Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
 * This file is part of HQ.
 * 
 * HQ is free software; you can redistribute it and/or modify
 * it under the terms version 2 of the GNU General Public License as
 * published by the Free Software Foundation. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */

package org.hyperic.util.shell;

import sun.misc.Signal;
import sun.misc.SignalHandler;

public class ShellSignalHandler implements SignalHandler {

    private static ShellBase handlerShell;

    public static void install(ShellBase shell, String signalName)
    {
        handlerShell = shell;

        Signal signal = new Signal(signalName);

        ShellSignalHandler handler =
            new ShellSignalHandler();

        try {
            Signal.handle(signal, handler);
        } catch(Exception e) {
            //java -Xrs for example will throw IllegalArgumentException
        }
    }

    public void handle(Signal signal) {
        if (signal.getName().equals("INT")) {
            Signal.handle(signal, SIG_IGN);
            handlerShell.shutdown();
            Runtime.getRuntime().halt(0);
        }
    }
}