>> 	and getaddrinfo/getnameinfo are the obvious ones who need *hostent/NIS
>> 	backend and have to be thread safe.
>It seems getaddrinfo()/getnameinfo() on FreeBSD are already thread-safe
>(by using giant lock, made by Ume-san on Oct 6, 2002), aren't they?

	bzzt.  it's not enough.  it calls functions that are not thread safe.
	(if everyone calls getaddrinfo and getaddrinfo only, it's okay, but
	in reality that's a crazy assumption)

itojun