/**
 * Demonstrating process creation in Java.
 *
 * Figure 3.13
 *
 * @author Gagne, Galvin, Silberschatz
 * Operating System Concepts with Java - Eighth Edition
 * Copyright John Wiley & Sons - 2010.
 */

import java.io.*;

public class OSProcess
{
	public static void main(String[] args) throws IOException {
		if (args.length != 1) {
			System.err.println("Usage: java OSProcess <command>");
			System.exit(0);
		}

		// args[0] is the command
		ProcessBuilder pb = new ProcessBuilder(args[0]);
		Process process = pb.start();	

		// obtain the input and output streams
		InputStream is = process.getInputStream();
		InputStreamReader isr = new InputStreamReader(is);
		BufferedReader br = new BufferedReader(isr);

		String line;
		while ( (line = br.readLine()) != null)
			System.out.println(line);

		br.close();
	}
}