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/**
 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.liferay.portal.kernel.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import java.util.Enumeration;
import java.util.Properties;

/**
 * View Source
 *
 * @author Brian Wing Shun Chan
 *
 */
public class SystemEnv {

	public static Properties getProperties() {
		Properties props = new Properties();

		try {
			Runtime runtime = Runtime.getRuntime();
			Process process = null;

			String osName = System.getProperty("os.name").toLowerCase();

			if (osName.indexOf("windows ") > -1) {
				if (osName.indexOf("windows 9") > -1) {
					process = runtime.exec("command.com /c set");
				}
				else {
					process = runtime.exec("cmd.exe /c set");
				}
			}
			else {
				process = runtime.exec("env");
			}

			BufferedReader br = new BufferedReader(
				new InputStreamReader(process.getInputStream()));

			String line;

			while ((line = br.readLine()) != null) {
				int pos = line.indexOf(StringPool.EQUAL);

				if (pos != -1) {
					String key = line.substring(0, pos);
					String value = line.substring(pos + 1);

					props.setProperty(key, value);
				}
			}
		}
		catch (IOException ioe) {
			ioe.printStackTrace();
		}

		return props;
	}

	public static void setProperties(Properties props) {
		Properties envProps = getProperties();

		Enumeration enu = (Enumeration)envProps.propertyNames();

		while (enu.hasMoreElements()) {
			String key = enu.nextElement();

			props.setProperty("env." + key, (String)envProps.get(key));
		}
	}

}