-d - don't run as a daemon (normally it does).
-l x - set logging level
Example /etc/inittab entry:
au:2345:respawn:/usr/sbin/acua_updated -d
The -d option is needed to stop init continually re-spawning the acua_updated daemon, which could also result in some other nasty stuff happening (not to mention eventually filling up your RAM, process table, and console with acua_updated programs or related error messages). In the event that acua_updated has a major problem and keeps dying as soon as init starts it, init will only try to re-spawn acua_updated once every 5 minutes. Init clues on to a problem after it restarts the daemon about 8 times a second.