Subject: Re: checking
To: None <firstname.lastname@example.org>
From: Feico Dillema <email@example.com>
Date: 12/20/1999 13:02:40
On Mon, Dec 20, 1999 at 08:46:31PM +0900, firstname.lastname@example.org wrote:
> maybe tech-userlevel...
> Due to my IPv6 changes, /etc/netstart requires /usr to be mounted.
> This is because I used sysctl to check for IPv6 support. I would
> like to avoid this and make mount of /usr to be optional as before.
> What is the best way to check for kernel's capability of doing IPv6
> (or random other protocol families, like appletalk)?
> I can think of several candidates:
> - use /sbin/ifconfig and some other tools. I may need grep, head, tail
> and some other things but they are in /usr.
> - add a tool that does
> if (socket(AF_INET6, SOCK_RAW, 0) < 0)
> into /sbin.
Maybe just add an option to ifconfig (-f ?) that returns list of the supported
address families (instead of separate tool)?