(Ubuntu specific-ish) Openvpn up script to configure local dnsmasq so only internal domains are resolved via the pushed DNS; needs root, unfortunately

set-vpn-dns.sh

#!/bin/bash

export PATH=/bin:/sbin:/usr/bin:/usr/local/bin

case $script_type in
    up)
        (for optionname in ${!foreign_option_*}; do
            echo ${!optionname}
        done) | awk '$2 == "DNS" { dns_server = $3 }; $2 == "DOMAIN" { domains = domains "/" $3 }; END { print "server=" domains "/" dns_server }' > /etc/NetworkManager/dnsmasq.d/$remote_1

        ;;
    down)
        rm /etc/NetworkManager/dnsmasq.d/$remote_1
        ;;
esac

/etc/init.d/network-manager reload