code: def walk_dir(path, args, state):
      
      if args.debug:
          sys.stderr.write("Walking %s\n" % path)
  
      for root, _dirs, files in os.walk(path):
          if not safe_process_files(root, files, args, state):
              return False
          if state.should_quit():
              return False
      return True
docs: Check all files in `path' to see if there is any requests that
      we should send out on the bus.