Try to guess pref in glorytun-run

Signed-off-by: Adrien Gallouët <adrien@gallouet.fr>

systemd/glorytun-run

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -e
+
 if [ ! -f "$1" ]; then
 	echo "usage: $(basename "$0") FILE"
 	exit 1
@@ -11,10 +13,16 @@ DEV="gt${HOST:+c}-$(basename "$1")"
 
 # Setting BIND is like going to 'expert mode'
 # This helper is pretty stupid and still needs some work
-if [ -n "$HOST" ] && [ -z "$BIND" ]; then
-	BIND=$(ip route get "$HOST" | awk '/src/{getline;print $0}' RS=' ')
-	ip rule add from "$BIND" table main pref 32000
-	ip rule add from all table 200 pref 32001
+if [ -n "$HOST" ]; then
+	if [ -z "$PREF" ]; then
+		PREF=$(ip rule | awk '/from all lookup main/{print $1; exit}' | tr -d :)
+		PREF=$((PREF-1))
+	fi
+	if [ -z "$BIND" ]; then
+		BIND=$(ip route get "$HOST" | awk '/src/{getline;print $0}' RS=' ')
+		ip rule add from "$BIND" table main pref "$((PREF-1))"
+	fi
+	ip rule add from all table 200 pref "$PREF"
 fi
 
 exec glorytun \

systemd/glorytun-setup

@@ -24,16 +24,20 @@ if [ -z "$KEY" ]; then
 fi
 
 # install files
-
 mkdir -p /etc/glorytun
-env | grep 'TABLE=\|HOST=' > /etc/glorytun/"$NAME"
+
+cat > /etc/glorytun/"$NAME" <<EOF
+${HOST:+HOST="$HOST"}
+EOF
+
 ( umask 077; echo "$KEY" > /etc/glorytun/"$NAME".key )
 
-# start services
+# always reload
+systemctl daemon-reload
 
+# start services
 _ask "Start glorytun now ? (enter to skip)" START
 case "$START" in y*|Y*)
-	systemctl daemon-reload
 	systemctl start systemd-networkd
 	systemctl start glorytun@"$NAME" ;;
 esac