Re: QTCTL?

> Why not just have a file that a client reads that lets the client know
> of changes to files.
> 
> client opens this server-provided file ("changes"? "dnotify"?)
> 
> Server agrees to send client info about all FIDS which client has
> active that are changing. Form of the message?
> fid[4]offset[8]len[4]

A changefile would be useful in many ways.  You can implement
Unix's select(2) or poll(2).  You can discover when devices
disappear or reappear for auto configuration. You can grab
new email as soon as it gets delivered to your mbox etc.
Change propagation is very handy.