getloadavg and source for /usr/bin/uptime

[David Jenkins]

Hi,

I'm running 5.3-RC1 and am trying to develop a (VERY) simple C based
tool to retrieve the system loads (as reported by uptime).

NB - I don't want to pipe uptime into awk or use a perl script etc,
I'd much prefer it to be C based.

As I'm dreadful at C I thought I'd look at the source for the uptime
program as that uses getloadavg from what I gather and modify it to
suit my needs.

The problem is, and I'm obviously being a bit stupid here, I can't
find the sources for it ... ?

I've grep'd and searched the entire source tree a good few times but
can't seem to find it. I've googled for things like "freebsd uptime"
or "freebsd uptime.c" as well as many others but have had no joy, and
have read what I believe to be the relevant manpages.

If any knows where it's hiding (or why it's not there) I'd be very
grateful if you could share it with me.

Many thanks,
David