adds vpn script to start in background incl. cleanup

vpn

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+# starts the wsl-vpnkit in a tmux sessions and cleanup beforehand, based on https://github.com/sakai135/wsl-vpnkit/issues/13
+
+echo $BASH_SOURCE
+echo $0
+
+ME=$(readlink -f "$BASH_SOURCE")
+
+if [ ! "$(id -u)" = "0" ]; then
+	echo "Not root, calling self as root..."
+	sudo -E sh -c $ME
+	exit "$?"
+else
+	echo "Running as root..."
+fi
+
+set -x 
+
+
+function kill_vpnkit(){
+	SIG=$2
+	MSG=$1
+
+	if ps -ef | grep -v grep | grep "bash ./wsl-vpnkit" >/dev/null; then
+		echo $MSG
+		for i in $(ps -ef | grep "bash ./wsl-vpnkit" | grep -v grep | awk '{print $2}'); do kill $SIG $i; done
+	fi
+}
+
+
+kill_vpnkit "Graceful kill of older processes..."
+
+#first graceful kill
+
+if ps -ef | grep -v grep | grep "bash ./wsl-vpnkit" >/dev/null; then
+	echo "Wait 60 sec for graceful death..."
+	sleep 20
+fi
+
+
+kill_vpnkit "Not so graceful kill of older processes..." -9
+
+
+#startup
+echo "Starting up..."
+
+cd ~/bin/wsl-vpnkit
+if [ -f "$ME.out" ]; then
+	mv $ME.out $ME.out.$(date +'%Y%m%d%H%M%S')
+fi
+
+tmux new -s wsl-vpnkit -d "./wsl-vpnkit > ./wsl-vpnkit.out 2>&1"

wsl-vpnkit

@@ -1,4 +1,6 @@
-#! /bin/sh
+#!/usr/bin/env bash
+
+set -x
 
 SOCKET_PATH=/var/run/wsl-vpnkit.sock
 PIPE_PATH="//./pipe/wsl-vpnkit"
@@ -69,7 +71,13 @@ close () {
     "$POWERSHELL_PATH" -Command "Stop-Process -Id $PID_VPNKIT"
     ip link set dev $TAP_NAME down
     ip route add $IP_ROUTE
-    echo "$RESOLV_CONF" > /etc/resolv.conf
+	if [ -f /etc/resolv.conf~ ] ; then 
+		# using a manually copied backup of the config is more stable, 
+		#	eg. when `wsl --shutdown` `close()` will not be executed and then the setting cannot be restored
+		cp /etc/resolv.conf~ /etc/resolv.conf
+	else 
+		echo "$RESOLV_CONF" > /etc/resolv.conf
+	fi 
     kill 0
 }