# configure a default interface for usage with LTSP
NET=192.168.0
DEFAULTROUTE_IFACE="$(route -n|grep ^0|sed -e 's/.* //')"
IFACE_LIST="$(cat /proc/net/dev|sed -e 's/^ *//' -e 's/:.*//'|grep -Ev '(\||lo|sit)')"

interfaces_entry() {
        cat <<EOF >>/target/etc/network/interfaces

auto $IFACE_LIST
iface $IFACE_LIST inet static
    address $NET.254
    netmask 255.255.255.0
    network $NET.0
    broadcast $NET.255

EOF

}

# if we already have a matching interface, there is no need to go on
if [ -n "$(ifconfig|grep $NET)" ];then 
        exit 0
fi

# exclude the interface with the default route, we only want unconfigured ones
IFACE_TMP=""
for iface in $IFACE_LIST;do
        if [ $iface != $DEFAULTROUTE_IFACE ]; then 
                IFACE_TMP="${IFACE_TMP:+$IFACE_TMP }$iface"
        fi
done
IFACE_LIST=$IFACE_TMP

# check if we still have more than one possible interface.
# if thats the case, show a selector with the detected ones
if [ "$(echo ${IFACE_LIST}|wc -w)" -gt 1 ]; then 
        db_subst ltsp-client-builder/dhcp-interface choices "$(echo "$IFACE_LIST" | sed 's/ /, /g')"

        db_fset ltsp-client-builder/dhcp-interface seen false
        db_input high ltsp-client-builder/dhcp-interface || true
    db_go || true

        db_get ltsp-client-builder/dhcp-interface || true
        IFACE_LIST="$RET"

        interfaces_entry
elif [  -z "$IFACE_LIST" ];then
        # we didnt get a proper interface, tell the user about it
        db_fset ltsp-client-builder/dhcp-manual seen false   
        db_input high ltsp-client-builder/dhcp-manual || true
        db_go || true
        exit 0
else
        interfaces_entry
fi

exit 0