///////    MatchFiles.java    ///////
import java.io.*;

public class MatchFiles
{   public static MatchingLines getFiles(String dir, String pattern)
            throws IOException
    {   String cmd = "/bin/ls " + dir;
        Process child = Runtime.getRuntime().exec(cmd);
        InputStream in = child.getInputStream();
        MatchingLines files = new MatchingLines(pattern);
        files.input(in); in.close();
	return files;
    }

    public static void main(String[] args)
            throws IOException
    {   if ( args.length == 2 )
        {  MatchingLines mf = getFiles(args[0], args[1]);
	   int i = mf.length();
	   System.out.println( i + " files found ");
	   mf.output(System.out);
	}
	else
	{  System.err.println("Usage: java MatchFiles dir string");
	}
    }
}