To have smsd start at boot time, you have to adapt
/etc/smsd.conf and insert the following into /etc/rc.local.

if [ -x /usr/local/bin/smsd ]; then
	install -d -o _smsd /var/run/smsd
	echo -n ' smsd';	/usr/local/bin/smsd
fi

smsd needs access to the serial port; this can be done by adding
the _smsd user to 'dialer' in /etc/group.
