Quick and dirty update-resolv-conf for OpenVPN under Fedora

update-resolv-conf.sh

#!/bin/sh

test -z "$dev" && exit 0

DNS="$(printenv | awk '/^foreign_option_.*=dhcp-option DNS / { print $NF; exit; }')"

test -z "$DNS" && exit 0

# Error: Reading applied connection from device 'tun0' (/org/freedesktop/NetworkManager/Devices/6) failed: Device is not activated
# When called manually after connection esablished: removes all routes!
#/usr/bin/nmcli dev modify "$dev" +ipv4.dns $DNS

# Quick and dirty workaround:
case "$script_type" in
  up   ) sed -i "1i nameserver $DNS"     /etc/resolv.conf ;;
  down ) sed -i  "/^nameserver $DNS\$/d" /etc/resolv.conf ;;
esac

exit 0