I am trying to setup Fetchmail / Procmail / Dovecot on my WRTSL54GS w/ a small RAID array attached.  For the most part things are going well, but I need some help.

Note:  I do want to do this.  I know this is a tiny machine.  I have my reasons.  I live off-grid and a five watt server with an 8 watt raid array is very important to me.  Every watt counts in my world.

So here is my issue:
I have several email accounts on an external hosting provider.  I have created local accounts on my OpenWRT box.  I can attach to them via Dovecot.  Things work very nicely.
I can use Procmail to deliver messages to the Maildir filestructure.
I can use Fetchmail to get mail from my external providers.

What I can't do is get the fetchmail to run procmail as the appropriate local user on the OpenWRT and as a result, all mail collected via fetchmail gets delivered to root.  I've tried wrapping things in a setuid script, but that doesn't work.  So much for easy.

It seems my options are either:
(a) recompile busy box with proper user support such that I can 'su'.
(b) recompile fetchmail?

I think I want to pursue (b) as this seems much less more invasive than (a). 

Is there something I'm missing?  Any pointers or alternate suggestions would be very much appreciated.
Thanks.

I also tried using the -d option on procmail.   No dice.

As best I can tell everything is compiled with all the multi-user options turned off.  Again, any suggestions would be appreciated.

I figured out a way to do it.  I built my own package for Dovecot 1.0.2.  Dovecot 1.0.2 provides it's own local delivery agent that will do the setuid switches properly.  I configured fetchmail to call it, and presto, everything appears to be working.