My kernel patches are viewable at:

love.warhead.org.uk/~alaric/hostid_64.tar.gz

You'll need to copy the resulting sys/sysctl.h into /usr/include as well
and rebuild sysctl(8) if you want o actually do anything.

I have yet to update the libc get/set hostid() functions, or rtsold.

I will also need to write a ?"hostid" tool to go with "hostname" and
"domainname".

Suggested interface:

hostid with no arguments dumps the host ID as a string of 16 hex digits
hostid <16 hex digits> sets the host ID directly
hostid -m <interface> set the host ID from the intercace's MAC address, as
	defined by EUI64
hostid -h sets the host ID from the MD5 of the hostname, with the
	appropriate bits set to make it a valid EUI64locally-allocated address.
hostid -f shows the status of the two EUI64 flag bits in the host id -
	"global/local" and "group/individual" - ina readable manner.

ABS