# File : menu.bush

    #!/usr/local/bin/bush

    trace false;

    declare
      reply     : universal_typeless := 0; -- user's reply
      showMenu  : boolean := true;         -- true if menu is shown before prompt
      directory : string := ".";           -- current directory to list
    begin

    while true loop

      if showMenu then
         put_line( "Main Menu" );
         new_line;
         put_line( "1. ls" );
         put_line( "2. ls -l" );
         put_line( "3. change directory" );
         put_line( "4. BUSH tracing on" );
         put_line( "5. BUSH tracing off" );
         put_line( "6. quit" );
         new_line;
         put_line( "The current directory is " & directory );
         new_line;
         showMenu := false;
      end if;

      put( "==> " );
      reply := get_line;
      if reply = 1 then
         cd (directory) ; ls;
      elsif reply = 2 then
         cd (directory) ; ls -l;
      elsif reply = 3 then
         put( "New directory?" );
         directory := get_line;
      elsif reply = 4 then
         trace true;
      elsif reply = 5 then
         trace false;
      elsif reply = 6 then
         exit;
      else
         put_line( "Please type a number between 1 and 6" );
         new_line;
         showMenu := true;
      end if;
    end loop;

    put_line( "Bye!" );

    end; -- script