extract mime attachment

[Hans Fugal]

I need to programmatically extract a mime attachment from a file.
Specifically, I will be sent a tarball and I need to save the tarball to
a specific directory. A shell program would be best, but a very simple
perl library or ruby library would work too.

-- 
Hans Fugal ; http://hans.fugal.net
 
There's nothing remarkable about it. All one has to do is hit the 
right keys at the right time and the instrument plays itself.
    -- Johann Sebastian Bach