filename completion is not done in the shell's namespace

rio performs the directory search for ^F filename completion in its own 
namespace, not the namespace of the process running in the terminal window.  
This is starting to annoy me.

* The terminal-handling code, including ^F handling, could be moved into a 
separate process from rio; that process could live in the same namespace group 
as the shell (or other program) running in it.  This might also make it easier 
to experiment with alternate ‘window manager’ and terminal implementations.

* The terminal-handling code could stay in rio, but fork a process in the same 
namespace group as the program running in the window when it is created.  This 
seems bad to me.

* ^F could stay somewhat broken forever.  No one else has cared enough about 
this issue to file a bug/feature ticket here.

Original issue reported on code.google.com by rransom....@gmail.com on 10 Aug 2012 at 8:06

cptaffe / plan9front

filename completion is not done in the shell's namespace #147