Subject: Re: getaddrinfo() and PF_LOCAL
To: Stig Venaas <>
From: Assar Westerlund <>
List: tech-net
Date: 08/01/2001 13:51:21
Stig Venaas <> writes:
> It looks like getaddrinfo() doesn't support PF_LOCAL, are there any plans
> to implement it, or would you welcome a patch? As I understand the
> OpenGroup's latest Base Spec draft, getaddrinfo() should support all
> supported families. 

Having getaddrinfo() return addresses for PF_LOCAL with
hints->ai_family == PF_UNSPEC (and especially with AI_PASSIVE) seems
like a bad idea to me.

Having it work for ai_family == PF_LOCAL might be good.

> Currently though the only implementations I've seen are by Craig
> Metz and Richard Stevens. The former is currently used in glibc.

Note that glibc just disabled the PF_LOCAL support in getaddrinfo (see

That getaddrinfo() would give you PF_LOCAL /tmp/4711 for AI_PASSIVE
NULL, 4711, without removing it, which means that repeating it you
would get EADDRINUSE.  Bad idea.