That's how the law works?

John McCain, on the Guantanamo ruling:

We are now going to have the courts flooded with so-called … habeas corpus suits against the government, whether it be about the diet, whether it be about the reading material. And we are going to be bollixed up in a way that is terribly unfortunate because we need to go ahead and adjudicate these cases.

You can invoke habeus corpus over food and magazines? I'd have thought such suits would be more common ....