Oh, I found a way:

1. First check which rc process it is (check id with ps). Can be tricky, luckily it was the first rc after starting rio.
2. ns id and check to which rio.name.number /mnt/wsys $digit it is attached
3. Once you have rio.name.number and $digit, in the remote drawterm instance you can just
      mount /srv/rio.name.number /n/wsys $digit 
    and
      cat /n/wsys/text
4. Happy!

Info taken from:

Tip of the day (plan9 wiki is down, cached link) http://webcache.googleusercontent.com/search?q=cache:YJngblNGWpoJ:www.plan9.bell-labs.com/wiki/plan9/Tip_o%27_the_day/index.html+&cd=1&hl=en&ct=clnk&gl=es 
Matthias Bauer page: http://shoestringfoundation.org/cgi-bin/blosxom.cgi/2007/06/27#learned

Knowing how to plug the mounted namespace screen to a current screen would be interesting, too.

Thanks,

Ruben


On Mon, Mar 3, 2014 at 3:59 PM, Rubén Berenguel <ruben@mostlymaths.net> wrote:
I have a long running process on my remote Plan9 (it's compiling a huge thing and it's taking ages... Raspberry Pi, it explains it) and I'd like to remotely check if it has finished (I can already drawterm into it). I can at least check if /proc/id has finished, but is there a better way? I.e. for instance (better solutions welcome anyway) can I peek remotely inside the window of a remote running process?

Thanks, 

Ruben