You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: unix.rb
    path of file: ./repos/chef/lib/chef/provider/cron
    
    the code of the file until where you have to start completion: #
# Author:: Bryan McLellan (btm@loftninjas.org)
# Author:: Toomas Pelberg (toomasp@gmx.net)
# Copyright:: Copyright 2009-2016, Bryan McLellan
# Copyrig
    
        def read_crontab
          crontab = shell_out(%w{/usr/bin/crontab -l}, user: @new_resource.user)
          status = crontab.status.exitstatus

          logger.trace crontab.format_for_exception if status > 0

          if status > 1
            raise Chef::Exceptions::Cron, "Error determining state of #{@new_resource.name}, exit: #{status}"
          end