But the reality is he's pretty unlikely to get another unless he really impresses in the small number of games he'll get into this season.
Sorry, I missed the first part of your post.
Khudobin will be with the Bruins for the whole season as back-up to Rask. They will see him every day in practice and he will likely get some starts. It should be enough for the Bruins to decide whether he gets another contract offer.