Using socat as a listener for a socket file

haproxy-init snippet

socat_start() {
        start-stop-daemon --quiet --start \
                --pidfile "$SOCAT_PIDFILE" \
                --background --make-pidfile \
                --exec $SOCAT_DAEMON tcp-listen:$SOCAT_TCP_PORT,fork UNIX-CLIENT:$SOCAT_SOCK < /dev/null
}