import java.io.*;
import java.util.*;


class Project2_1 {
		// str to put the input from the keyboard
	private static String str = new String();
	public static BufferedReader in =
			new BufferedReader(new InputStreamReader(System.in));

	public static CompoundFile root = new CompoundFile(null,"root");

	public static void main(String argv[]){
			// when start the program, start a new file system,
		FileSystem file_system = new FileSystem(root);
		for (;;) {
			System.out.print("$>");
			System.out.flush();
			try{
				str = in.readLine();
			}
			catch(IOException e) {
				System.err.println(e);
			}

			Parser a_parser = new Parser();
			a_parser.parse(str, "&");
			int numberOfCommand = a_parser.getTokens().size();

				// creat threads below
			Thread t[] = new Thread[numberOfCommand];
			for (int i = 0; i < numberOfCommand; i ++) {
				String comd 
					= (String)a_parser.getTokens().get(i);
				Command cThread = new Command(comd,file_system);
				t[i] = new Thread(cThread);
				t[i].start();
			}
			
			for (int i = 0; i < numberOfCommand; i ++) {
				try {
					t[i].join();
				} catch (InterruptedException e) {
					System.err.println(e);
				}
			}
		}// end of for(;;)
	}// end of main();
}// end of class Project1.2.