Are socket options inherited across accept() from the listening socket?

Question

Suppose the listening socket passed to accept has non-default options set on it with setsockopt. Are these options (some or all of them?) inherited

Answer 1

Socket options is the place where things go that don't fit elsewhere. So, it's expected for different socket options to have different inheriting behaviour. Whether to inherit or not a socket option is decided on a case by case basis.