Update chkppp.sh

grep -E '^auto.*lcwa.*$|^auto.*provider.*$' /etc/network/interfaces

scripts/chkppp.sh

@@ -5,9 +5,12 @@ SCRIPT_VERSION=20201206.165240
 # Bash script to check to see if a pppoe connection is still up, and if not, re-establish it.
 
 # Get our PPPoE account name from /etc/network/interfaces
-PPPOE_ACCOUNT="$(grep -E '^auto.*lcwa.*$' /etc/network/interfaces | awk '{ print $2 }')"
+PPPOE_ACCOUNT="$(grep -E '^auto.*lcwa.*$|^auto.*provider.*$' /etc/network/interfaces | awk '{ print $2 }')"
 
-[ -z "$PPPOE_ACCOUNT" ] && exit 1
+if [ -z "$PPPOE_ACCOUNT" ]; then
+	echo 'Error: No ppp interface defined in /etc/network/interfaces'
+	exit 1
+fi
 
 # Are we showing an active ppp interface?
 if [ $(ip -br a | grep -c -E '^ppp.*peer') -lt 1 ]; then