# Include the socket header file, to provide TCP server methods.
  require 'socket'
  
  # Start the program.
  print "\n  rbIdent, the Ruby Ident Daemon.\n\n"
  
  # Listen on port 113.
  daemon = TCPServer.new( 113 )
  
  # Accept requests.
  while ( session = daemon.accept )
  
    # Get the local-port and foreign-port.
    prefix = session.gets.strip
    
    # Print incoming.
    print "  IN  >> #{prefix}\n"
    
    # Get the OS specified.
    if ( ARGV[0] != nil )
      
      # Use the argument given.
      osid = ARGV[0]
      
    else
      
      # Use a preset default (GEOS, a graphical operating system for the Commodore 64).
      osid = "GEOS"
      
    end
    
    # Get the ident username specified.
    if ( ARGV[1] != nil )
      
      # Use the argument given.
      userid = ARGV[1]
      
    else
      
      # Use a preset default (ident).
      userid = "ident"
      
    end
    
    # Print out the ident response to the server.
    retstr = "#{prefix} : USERID : #{osid} : #{userid}\r\n"
    session.print "#{retstr}"
    
    # Print outgoing.
    print "  OUT << #{retstr.strip}\n\n"
    
    # Close the session.
    session.close
  
  end