Something

$ cat /usr/local/etc/rc.d/x-sshd_8080
#!/bin/sh
#
# $FreeBSD: src/etc/rc.d/sshd,v 1.12.2.1 2008/01/28 07:55:44 dougb Exp $
#

# PROVIDE: sshd
# REQUIRE: LOGIN cleanvar

. /etc/rc.subr

name="sshd"
rcvar=`set_rcvar`
command="/usr/sbin/${name} -p 8080 -f /etc/ssh/sshd_config"
keygen_cmd="sshd_keygen"
start_precmd="sshd_precmd"
pidfile="/var/run/${name}-8080.pid"
extra_commands="keygen reload"

timeout=300

user_reseed()
{
        (
        seeded=`sysctl -n kern.random.sys.seeded 2>/dev/null`
        if [ "x${seeded}" != "x" ] && [ ${seeded} -eq 0 ] ; then
                warn "Setting entropy source to blocking mode."
                echo "===================================================="
                echo "Type a full screenful of random junk to unblock"
                echo "it and remember to finish with <enter>. This will"
                echo "timeout in ${timeout} seconds, but waiting for"
                echo "the timeout without typing junk may make the"
                echo "entropy source deliver predictable output."
                echo ""
                echo "Just hit <enter> for fast+insecure startup."
                echo "===================================================="
                sysctl kern.random.sys.seeded=0 2>/dev/null
                read -t ${timeout} junk
                echo "${junk}" `sysctl -a` `date` > /dev/random
        fi
        )
}

sshd_keygen()
{
        (
        umask 022

        # Can't do anything if ssh is not installed
        [ -x /usr/bin/ssh-keygen ] || {
                warn "/usr/bin/ssh-keygen does not exist."
                return 1
        }

        if [ -f /etc/ssh/ssh_host_key ]; then
                echo "You already have an RSA host key" \
                    "in /etc/ssh/ssh_host_key"
                echo "Skipping protocol version 1 RSA Key Generation"
        else
                /usr/bin/ssh-keygen -t rsa1 -b 1024 \
                    -f /etc/ssh/ssh_host_key -N ''
        fi

        if [ -f /etc/ssh/ssh_host_dsa_key ]; then
                echo "You already have a DSA host key" \
                    "in /etc/ssh/ssh_host_dsa_key"
                echo "Skipping protocol version 2 DSA Key Generation"
        else
                /usr/bin/ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key -N ''
        fi

        if [ -f /etc/ssh/ssh_host_rsa_key ]; then
                echo "You already have a RSA host key" \
                    "in /etc/ssh/ssh_host_rsa_key"
                echo "Skipping protocol version 2 RSA Key Generation"
        else
                /usr/bin/ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -N ''
        fi
        )
}

sshd_precmd()
{
        if [ ! -f /etc/ssh/ssh_host_key -o \
            ! -f /etc/ssh/ssh_host_dsa_key -o \
            ! -f /etc/ssh/ssh_host_rsa_key ]; then
                user_reseed
                run_rc_command keygen
        fi
}

load_rc_config $name
run_rc_command "$1"