+++ Chris Jones [2011-03-16 16:24 +0000]:
> I'm using head of the menuconfig2 branch. The buildroot rootfs doesn't  
> have ssh or dropbear in it, so I can't transfer files in or out of any  
> of the filesystems using USB networking. That makes the 'recovery  
> kernel' largely useless.
>
> How do we get it back? This is a showstopping problem, especially for  
> those Balloon customers who rely on the instructions in
>
> http://www.balloonboard.org/balloonwiki/Balloon3SingleSidedRootFS
>
> *to build their balloon-based products every day*.

The tcl production process uses telnet to issue commands and nc for
data transfer, instead of ssh/scp.
That bypasses ssh's tiresome whinging about every new card being a
MITM attack.

bbl has built-in support for uploading this way.

So instead of doing 
serial to balloon: start usb netowrking
ssh <balloonIP>: issue commands

you can do 

utils/bbl --root

utils/bbl --kernel 
 
utils/bbl --shellprompt --usbnet 
 
utils/bbl --shellcommand "apt-get install blah"

where your bblrc contains setting for PORT, $BALLOON_IP_ADDRESS,
$USBNET_HOST_IFACE, OPENOCD_CONFIG (to allow serial, usb and reset
behaviour)

(or you include --port /dev/ttyS0 --usbnetip 10.0.0.1 --usbhostiface
usb0 --openocdconfig <filename> on the bbl command line)
the bblrc defaults in the distro should work...

Wookey
-- 
Principal hats:  Linaro, Emdebian, Wookware, Balloonboard, ARM
http://wookware.org/