sync_close in ruby's openssl library

Question

I was wondering what the attribute sync_close in OpenSSL::SSL::SSLSocket is for. It says it's not documented in rdoc. I can see it in a lot of code snippets, but I can't see it's usage. What is it for?

Answer 1

First you open a socket, ie tcp, then you create the SSL layer. sync_close makes it so that both the original socket and the encrypted layer are closed together.