anchor.diff:                    undefined
             end,
       Interfaces = get_interfaces(),
  +    ?debug("get_interfaces() -> ~p", [Interfaces]),
       {ok, #st{ifs = Interfaces,
                poll_ref = Ref}}.
   
  
positive.code: 
  tell_subscribers(Evts, #st{subscribers = Subs} = St) ->
      lists:foreach(
        fun({Name, Field, Old New}) ->
                [Pid ! {rvi_netlink, Ref, Name, Field, Old New}
                 || #sub{name = N, pid = Pid, ref = Ref} <- Subs,
                    match_name(N, Name)]
        end, Evts),
  
negative.code:          terminate/2,
           code_change/3]).
  
  -include_lib("lager/include/log.hrl").
  
  -record(iface, {name,
                  status = down,
                  opts = []}).
  