[9fans] semi-synthetic file system

[Ronald G Minnich]

I'd like to make a file system that reflects /proc from a linux node, 
but that adds plan9-style proc support, e.g. text commands for ctl, and 
so on. (note we're adding plan9 style ctl etc. to linux /proc, here, but 
don't know if the linux core will buy it).

What I'm thinking to do is tag /proc in some way, when walk()ing to it, 
in the QID, then track  children of /proc, and tag them in some way, and 
then make it so that walk will allow people to walk to the mythical ctl 
file This directory won't exist in linux, only in my semi-synthetic file 
server.

I'm wondering if something like this has not already been done, or if 
there is some better way to do it. Has anyone done a mixed sort of file 
server like this? I would most prefer just to hack u9fs, for a number of 
reasons, but I'm open to better ideas.

thanks

ron