Init scripts should be installed into /etc/init.d using the doinitd or
newinitd functions (see Install Functions Reference).
Any configuration (commandline parameters or environment variables) for these scripts
should be handled via entries in /etc/conf.d with the same filename
—
doconfd or newconfd can be used to install these.
An overview of the Gentoo init system and how to write init scripts is available in the Writing Init Scripts section.