Something

#!/bin/sh
#

# PROVIDE: foo
# REQUIRE: NETWORKING
# KEYWORD: shutdown

#
# Add the following lines to /etc/rc.conf to enable foo:
#
#foo_enable="YES"
#
#

. /etc/rc.subr

name=foo
rcvar=`set_rcvar`

command="/usr/local/sbin/foo"
required_files=/usr/local/etc/nrpe.cfg
pidfile=/var/run/${name}.pid

# set defaults

foo_enable=${foo_enable:-"NO"}
foo_flags=${foo_flags:-""}

load_rc_config ${name}
run_rc_command "$1"