bash, read, and tab completion

[Matt Price <matt.price@utoronto.ca>]

I'm writing a script to make sure I keep good records while
experimenting with kernel parameters.  between 
make menuconfig
and
make-kpkg kernel-image

I want to make sure that I save my .config in a safe location.
In bash I supose this is easy:

echo -n "Save this config as: "
read filename
cp .config $filename

however, there's no guarantee there that I've inputted a valid path.
Is there a way to do the following while 'read'ing:

- provide a default value (e.g. /usr/src/configs/latest-config)
- provide bash-style tab completion (so that I can be sure I'm saving
in a valid directory)

I don't notice any hints in this direction in the ABS, but probably
I'm just missing them.  Guiadance appreciated!

thanks,

matt

--------------------------
 .''`.       Matt Price 
: :'  :      Debian User
`. `'` 	     & hemi-geek
  `-     
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