# set the variables DNS_SERVER, DNS_DOMAIN or DNS_SEARCH in your image file
# and require this file afterwards

DNSSERVER = "${@d.getVar('DNS_SERVER', True) or ''}"
DNSDOMAIN = "${@d.getVar('DNS_DOMAIN', True) or ''}"
DNSSEARCH = "${@d.getVar('DNS_SEARCH', True) or ''}"

ROOTFS_POSTPROCESS_COMMAND += "set_static_dns;"

set_static_dns() {
    echo "#created by image-static-dns.inc" > ${IMAGE_ROOTFS}/etc/resolv.conf
    if [ -n "${DNSSERVER}" ]; then
        printf "setting DNS-server\n"
        echo "nameserver ${DNSSERVER}" >> ${IMAGE_ROOTFS}/etc/resolv.conf
    fi
    if [ -n "${DNSDOMAIN}" ]; then
        printf "setting DNS-domain\n"
        echo "domain ${DNSDOMAIN}" >> ${IMAGE_ROOTFS}/etc/resolv.conf
    fi

    if [ -n "${DNSSEARCH}" ]; then
        printf "seting DNS-search\n"
        echo "search ${DNSSEARCH}" >> ${IMAGE_ROOTFS}/etc/resolv.conf
    fi

    if [ -w ${IMAGE_ROOTFS}/default/udhcpc ]; then
        sed -i -e "s/^#.*\(STATIC_DNS\).*$/\1=yes/g" ${IMAGE_ROOTFS}/default/udhcpc
    fi
}