539398 find which facebook page is not reachable

hello all, when someone with a "facebook business page" changes something in the facebook privacy settings, then someone who is not connected to facebook will be redirected to [login to view URL] and will not reach the business page. i want to make an autometed script which goes through all the links i have of facebook pages and checks if the link stays on the "business page" or gets redirected to [login to view URL] please bid. ronen.