Re: [9fans] Setting 9pi Start State / Drawterm to 9pi

[Richard Miller <9fans@hamnavoe.com>]

> i'm not sure what type of kernel is on the stock 9Pi image.

The 9pi.img has both types of kernel in the dos partition.  To boot
the pi as a cpu server instead of a terminal, change 'kernel=9pi' to
'kernel=9picpu' in config.txt, and copy cmdline-cpu.txt to cmdline.txt

But I think the query was about a simple way to connect to your own
plan 9 terminal with drawterm, without making it into a cpu server.

> if it's a term
> kernel, you can't drawterm to it;

Actually that's not so.  For example, a quick-and-dirty method posted
to 9fans by Luke Evans on 10 Dec 2012 (which applies to any Plan 9
terminal, not just the pi):

	echo 'key proto=p9sk1 dom=plan9 user=glenda !password=MYPASS' >/mnt/factotum/ctl
	aux/listen -t tcp!*!ncpu /bin/cpu -R &

This will only allow the terminal owner to connect.  For more general
cpu-like service on a terminal, I use this script (which requires some
prior setup with auth/changeuser to create the lib/keys file):

	#!/bin/rc
	auth/factotum -g 'user=miller dom=hamnavoe.com proto=p9sk1 !password?'
	rfork ne
	echo auth server password:
	auth/keyfs -p $home/lib/keys
	aux/listen1 -t tcp!*!ticket /bin/rc -c '/bin/auth/authsrv -d $net' &
	service=cpu aux/listen1 tcp!*!17007 /bin/exportfs -a&
	service=cpu aux/listen1 tcp!*!cpu /bin/cpu -O &
	service=cpu aux/listen1 tcp!*!ncpu /bin/cpu -R &

Nowadays there's hardly any difference between cpu and terminal
kernels, and in fact I would advocate combining the two.  Only a few
lines of kernel source code need to be changed to allow it to decide
at boot time whether to behave as a cpu server or terminal, depending
on the setting of service= in plan9.ini.