--- script/advman.orig	2018-07-01 23:09:35.220397779 -0400
+++ script/advman	2018-07-01 23:10:19.464063029 -0400
@@ -1,146 +1,35 @@
 #!/bin/bash
 
 set -u
 if [ "${EUID}" -ne 0 ]; then
   echo "Must be root"
   exit 1
 fi
 
-COMMAND=0
-SCRIPT=$0
-INSTALLPATH=/usr/share/advtty
-DEAMON=advttyd
-SERVICE=vcomd
-DRIVER=advvcom
-CONFIGFILE=/etc/advttyd.conf
-DEAMONFILE=$INSTALLPATH/$DEAMON
-#DKMSFILE=/lib/modules/`uname -r`/updates/dkms/$DRIVER.ko
-#KERNEL=`uname -r|cut -c1-3`
-if false # [ $KERNEL = "2.4" ]
-then
-DRIVERFILE=$INSTALLPATH/$DRIVER.o
-else
-DRIVERFILE=$DRIVER
-fi
-
-echo $DRIVERFILE
-
-RETURN=
 OBJECTIVE=
 
-hasdriver()
-{
-	COUNT=`lsmod | grep $DRIVER -c`
-	if [ $COUNT -gt 0 ]
-	then
-		echo "kernel moduel $DRIVER.ko detected..."
-		RETURN=1
-	else
-		echo "kernel moduel $DRIVER.ko not installed... try objective \"insert\" first"
-		RETURN=0
-	fi
-}
-
-insdriver()
-{
-	if false # [ $KERNEL = "2.4" ]
-	then
-	echo "inserting kernel moduel $DRIVER.o..."
-	modprobe $DRIVERFILE
-	elif false # [ -e $DKMSFILE ]
-	then
-	echo "inserting DKMS module $DRIVER.ko..."
-	modprobe $DKMSFILE
-	else
-	echo "inserting kernel moduel $DRIVER.ko..."
-	modprobe $DRIVERFILE
-	fi
-}
-
-rmdriver()
-{
-	if false # [ $KERNEL = "2.4" ]
-	then
-	echo "removing kernel moduel $DRIVER..."
-	rmmod $DRIVER
-	else
-	echo "removing kernel moduel $DRIVER.ko..."
-	rmmod $DRIVER.ko
-	fi
-}
-
-stopService()
-{
-	echo "stoping all local services..."
-	killall -s 9 $SERVICE
-}
-
-startDeamon()
-{
-	# for 2.4.x kernel, we should make node by myself
-	if false # [ $KERNEL = "2.4" ]
-	then
-		i=1
-		while [[ $i -le 256 ]]
-		do
-			if [ -z $(awk '$2=="vttyAP"{print $1}' /proc/devices) ]
-			then
-				mknod /dev/vttyAP$i c $(awk '$2=="vttyap/%d"{print $1}' /proc/devices) $i
-			else
-				mknod /dev/vttyAP$i c $(awk '$2=="vttyAP"{print $1}' /proc/devices) $i
-			fi
-			((i = i + 1))
-		done
-	fi
-	echo "invoking local deamon..."
-	install -m 700 -oroot -groot -d /tmp/advmon
-	#`$DEAMONFILE`
-	$DEAMONFILE
-
-}
-
-stopDeamon()
-{
-#	COUNT=`ps -A|grep $DEAMON -c`
-#	while [ $COUNT -gt 0 ]
-#	do
-#		PID=`ps -A|grep $DEAMON |sed -r s/^[[:space:]]*//g|sed  -r s/"[[:space:]]+.+[[:space:]]+[[:digit:]]+:[[:digit:]]+:[[:digit:]]+[[:space:]]+$DEAMON"/""/g | sed '/^[ \t]*$/d'|head -n 1`
-#
-#		echo "killing $DEAMON $PID"
-#
-#		kill -9 $PID
-#		COUNT=`ps -A|grep $DEAMON -c`
-#	done
-	killall -s 9 $DEAMON
-	if false # [ $KERNEL = "2.4" ]
-	then
-        	rm -rf /dev/vttyAP*
-	fi
-}
-
-
 usage()
 {
 cat << EOF
 usage: $0 options
 
 This script lists helps you manage local advtty service.
 
 OPTIONS:
    -h      Show this message
    -o	   Execute objective:
    		start 	- start advtty local service
 		stop 	- stop advtty local service
 		restart	- restart advtty local service
-		insert	- insert $DRIVER.ko module
-		remove	- remove $DRIVER.ko module
+		insert	- insert module
+		remove	- remove module
 
 Example:
 	$0 -o start
 	$0 -o restart
 	$0 -o stop
 
 EOF
 }
 
 while getopts 'ho:' OPTION
@@ -155,61 +44,42 @@ do
              ;;
          ?)
 	     usage
              exit
              ;;
      esac
 done
 
 case $OBJECTIVE in
 	start)
-		hasdriver
-		if [ $RETURN -eq 1 ]
-		then
-			echo "starting service...."
-			startDeamon
-		else
-			echo "can not start service..."
-			insdriver
-			startDeamon
-		fi
+		systemctl start 'advtty-vcom.service'
 		# systemd-notify --ready
 		exit 0
 	;;
 	restart)
-		hasdriver
-		if [ $RETURN -eq 1 ]
-		then
-			echo "starting service...."
-			startDeamon
-		else
-			echo "can not start service..."
-			insdriver
-			startDeamon
-		fi
+		systemctl reload 'advtty-vcom.service'
 		# systemd-notify --ready
 		exit 0
-
 	;;
 	stop)
-		echo stop
-		stopService
-		stopDeamon
+		systemctl stop 'advtty-vcom.service'
 		# systemd-notify --ready
 		exit 0
 	;;
 	insert)
-		insdriver
+		modprobe 'advvcom'
 		# systemd-notify --ready
 		exit 0
 	;;
 	remove)
-		stopService
-		stopDeamon
-		rmdriver
+		systemctl stop 'advtty-vcom.service'
 		# systemd-notify --ready
 		exit 0
 	;;
+	*)
+		usage
+		exit 1
+	;;
 esac
 usage