# vim: set ft=sh:
run_hook ()
{
    local line i address netmask gateway dns0 dns1 rootserver rootpath defaultrootpath defaultserver

    : > /ip_opts

    if [ -z "${ip}" -a -n "${nfsaddrs}" ]; then
        ip="${nfsaddrs}"
    fi

    if [ -n "${ip}" ]; then
        # setup network and save some values
        ipconfig "ip=${ip}" | while read line; do
            # echo ":: ${line}"
            if [ "${line#"IP-Config:"}" != "${line}" ]; then
                continue
            fi
            line="$(echo ${line} | sed -e 's/ :/:/g;s/: /=/g')"
            for i in ${line}; do
                case "${i}" in
                    address=*)
                        echo "${i}" >> /ip_opts
                        ;;
                    netmask=*)
                        echo "${i}" >> /ip_opts
                        ;;
                    gateway=*)
                        echo "${i}" >> /ip_opts
                        ;;
                    dns0=*)
                        echo "${i}" >> /ip_opts
                        ;;
                    dns1=*)
                        echo "${i}" >> /ip_opts
                        ;;
                    rootserver=*)
                        echo "${i}" >> /ip_opts
                        ;;
                    rootpath=*)
                        echo "${i}" >> /ip_opts
                        ;;
                esac
            done
        done

        . /ip_opts

        echo "IP-Config: ${address}/${netmask}"
        echo "IP-Config: gw: ${gateway}    dns0: ${dns0}    dns1: ${dns1}"

        # calculate nfs_server, nfs_path and nfs_option for later nfs mount
        if [ "${root}" = "/dev/nfs" -o "${nfsroot}" != "" ]; then
            # parse rootpath if defined by dhcp server
            if [ -n "${rootpath}" ]; then
                line="${rootpath}"
                nfs_server="${line%%:*}"
                [ "${nfs_server}" = "${line}" ] && nfs_server="${rootserver}"
                defaultserver="${nfs_server}"
                line="${line#*:}"
                nfs_path="${line}"
                defaultrootpath="${nfs_path}"
            else
                # define a default rootpath
                if [ "${rootpath}" = "" ]; then
                    defaultrootpath="/tftpboot/${address}"
                fi
            fi

            # parse nfsroot if present (overrides rootpath)
            if [ -n "${nfsroot}" ]; then
                line="${nfsroot}"
                nfs_server="${line%%:*}"
                [ -z "${nfs_server}" ] && nfs_server="${defaultserver}"
                line="${line#*:}"
                nfs_path="${line%%,*}"
                line="${line#"${nfs_path}"}"
                [ -z "${nfs_path}" ] && nfs_path="${defaultrootpath}"
                nfs_option="${line#","}"
            fi

            # ensure root and filesystem type are set proper for nfs boot
            root="/dev/nfs"
            rootfstype="nfs"

            echo "NFS-Mount: ${nfs_server}:${nfs_path}"

            # set mount handler for NFS
            mount_handler="nfs_mount_handler"
        fi
    fi
}

nfs_mount_handler() {
    if [ -z "$nfs_server" -o -z "$nfs_path" ]; then
        err "Unable to mount root filesystem over NFS: wrong parameters."
        echo "You are being dropped to a recovery shell"
        echo "    Type 'exit' to try and continue booting"
        launch_interactive_shell
        msg "Trying to continue (this will most likely fail) ..."
    fi
    nfsmount ${nfs_option:+-o ${nfs_option}} "${nfs_server}:${nfs_path}" "$1"
}