7.30 How can I get a daemon to successfully start from /etc/rc at 9.x?

A) /etc/rc will kill all child processes on exit; daemons started from
   localrc() (for example) must have called setsid() and have been
   given time to daemonize (what a word!) themselves.

   If your system doesn't have the C compiler you can use a call to nohup to
   start the daemon instead of calling setsid().

B) Another trick that works is to include the following command in the rc file:

   /usr/bin/at now + 1 minute < /etc/rc.at

   Then create a file named /etc/rc.at, which should contain the command to
   start the daemon.  Your daemon will start 1 minute after the rc file
   calls the command.  You can use times other than 1 minute.

(thanks to Mike Peterson, <system@alchemy.chem.utoronto.ca>, and
           Noel Hunter <noel@wfu.edu>)