From: utzoo!decvax!decwrl!sun!megatest!fortune!hpda!hplabs!sri-unix!CHUQUI@MIT-MC
Newsgroups: net.unix-wizards
Title: mutual exclusion between processes
Article-I.D.: sri-arpa.745
Posted: Fri Mar  4 17:07:00 1983
Received: Fri Apr  1 05:48:11 1983

From:  Charles F. Von Rospach <CHUQUI @ MIT-MC>

That works fine, unless the Daemon runs setuid root, which I was doing
with lpd for a while. Anytime something runs setuid root, locking is going
to have a problem. What I ended up doing was install the MKTEMP and LINK, 
and have lpd setuid to run under an account called 'daemon' with group 1,
uid 1.

chuck