/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.command.system;
import java.io.PrintWriter;
import org.jnode.shell.AbstractCommand;
import org.jnode.shell.syntax.Argument;
import org.jnode.shell.syntax.FlagArgument;
import org.jnode.vm.Unsafe;
/**
* This command turns kernel debug print capture on and off. When "on",
* messages from calls to org.jnode.vm.Unsafe.debug(...) get copied to
* the serial port.
*
* @author Ewout Prangsma (epr@users.sourceforge.net)
* @author crawley@jnode.org
*/
public class KdbCommand extends AbstractCommand {
private static final String help_on = "Enable the kernel debugger";
private static final String help_off = "Disable the kernel debugger";
private static final String help_super = "Control kernel debugging";
private static final String str_enable = "KDB enabled";
private static final String str_disable = "KDB disabled";
private static final String fmt_set = "KDB is %s%n";
private static final String str_enabled = "enabled";
private static final String str_disabled = "disabled";
private final FlagArgument argOn;
private final FlagArgument argOff;
public KdbCommand() {
super(help_super);
argOn = new FlagArgument("on", Argument.OPTIONAL, help_on);
argOff = new FlagArgument("off", Argument.OPTIONAL, help_off);
registerArguments(argOff, argOn);
}
public static void main(String[] args) throws Exception {
new KdbCommand().execute(args);
}
@Override
public void execute() {
PrintWriter out = getOutput().getPrintWriter();
if (argOff.isSet()) {
Unsafe.setKdbEnabled(false);
out.println(str_disable);
} else if (argOn.isSet()) {
Unsafe.setKdbEnabled(true);
out.println(str_enable);
} else {
// FIXME ... we shouldn't have to do this ...
final boolean state = Unsafe.setKdbEnabled(false);
Unsafe.setKdbEnabled(state);
out.format(fmt_set, (state ? str_enabled : str_disabled));
}
}
}