Update

He's not dead yet. Apparently, the argument about whether or not to keep the breathing tube starts today; he wanted to live to his next wedding anniversary which is June 10th, after his 90th birthday. However, he only wanted to be resuscitated, not kept alive by machines - the problem being, he didn't make this as clear to the doctor as he should have, though apparently he did to the family. I have no idea how all this works, though I know he's in a bad way and has been in pain for a long time - so I kinda wish everyone would just let him go if he's on the machines. It seems more humane to me.