post_install() {
    check_hostid
    run_depmod
}

post_remove() {
    run_depmod
}

post_upgrade() {
    check_hostid
    run_depmod
}

check_hostid() {
    # Check /etc/hostid to see if it set to the sentinel value, see
    # https://wiki.archlinux.org/index.php/ZFS for more information.
    HOSTID=$(hostid)
    if [ "0x$HOSTID" == "0xffffffff" ]; then
        # Generate a new hostid
        : >/etc/hostid
        HOSTID=$(hostid)
        # hostid is 4 byte little endian
        printf $(echo -n $HOSTID | sed 's/\(..\)\(..\)\(..\)\(..\)/\\x\4\\x\3\\x\2\\x\1/') >/etc/hostid
    fi
}

run_depmod() {
    echo ">>> Updating module dependencies. Please wait ..."

    _kernel_version_x32_full="4.1.6-gnu-1"
    _kernel_version_x64_full="4.1.6-gnu-1"

    [[ $CARCH == "i686" ]] && _kernel_version_full=${_kernel_version_x32_full} || _kernel_version_full=${_kernel_version_x64_full}

    depmod ${_kernel_version_full}
}