/*
* $Id$
*
* 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.common;
import gnu.java.security.action.GetEnvAction;
import gnu.java.security.action.GetPropertiesAction;
import java.io.PrintWriter;
import java.security.AccessController;
import java.util.Map;
import java.util.Properties;
import java.util.TreeMap;
import org.jnode.shell.AbstractCommand;
import org.jnode.shell.ShellUtils;
import org.jnode.shell.syntax.Argument;
import org.jnode.shell.syntax.FlagArgument;
/**
* @author epr
*/
public class EnvCommand extends AbstractCommand {
// FIXME ... this class and the corresponding alias are incorrectly named
private static final String help_env = "If set, print the environment variables rather than the System props";
private static final String help_shell = "If set, print the shell props rather than the System props";
private static final String help_super = "Print the System/Shell props or Environment Variables";
private final FlagArgument envArg;
private final FlagArgument shellArg;
public EnvCommand() {
super(help_super);
envArg = new FlagArgument("env", Argument.OPTIONAL | Argument.SINGLE, help_env);
shellArg = new FlagArgument("shell", Argument.OPTIONAL | Argument.SINGLE, help_shell);
registerArguments(envArg, shellArg);
}
public static void main(String[] args) throws Exception {
new EnvCommand().execute(args);
}
/**
* Execute this command
*/
public void execute() throws Exception {
final TreeMap<?, ?> sortedPs;
if (envArg.isSet()) {
Map<String, String> ps =
(Map<String, String>) AccessController.doPrivileged(new GetEnvAction());
sortedPs = new TreeMap<Object, Object>(ps);
} else if (shellArg.isSet()) {
sortedPs = ShellUtils.getCurrentShell().getProperties();
} else {
Properties ps = AccessController.doPrivileged(new GetPropertiesAction());
sortedPs = new TreeMap<Object, Object>(ps);
}
final PrintWriter out = getOutput().getPrintWriter();
for (Map.Entry<?, ?> entry : sortedPs.entrySet()) {
final String key = entry.getKey().toString();
final String value = entry.getValue().toString();
out.println(key + '=' + value);
}
}
}