#!/bin/bash
#


#misc globals
usb_devs=""
num_usb_devs=0
usb_device=""
isChromeOS=true
isChromiumOS=false
isCloudready=false
flashromcmd=""
flashrom_params="-p host"
cbfstoolcmd=""
gbbutilitycmd=""
preferUSB=false
useHeadless=false
addPXE=false
pxeDefault=false
isHswBox=false
isBdwBox=false
isHswBook=false
isBdwBook=false
isHsw=false
isBdw=false
isByt=false
isBsw=false
isSkl=false
isSnbIvb=false
isApl=false
isKbl=false
isGlk=false
isStr=false
isWhl=false
isCml=false
isCmlBox=false
isZen2=false
isJsl=false
isTgl=false
isUnsupported=false
firmwareType=""
isStock=true
isFullRom=false
isBootStub=false
isUEFI=false
hasRwLegacy=false
unlockMenu=false
hasUEFIoption=false
hasLegacyOption=false
hasShellball=false
wpEnabled=false
hasLAN=false
hasCR50=false
kbl_use_rwl18=false
useAltfwStd=false
runsWindows=false

hsw_boxes=('mccloud' 'panther' 'tricky' 'zako')
hsw_books=('falco' 'leon' 'monroe' 'peppy' 'wolf')
bdw_boxes=('guado' 'rikku' 'tidus')
bdw_books=('auron_paine' 'auron_yuna' 'buddy' 'gandof' 'lulu' 'samus')
baytrail=('banjo' 'candy' 'clapper' 'enguarde' 'glimmer' 'gnawty' 'heli' \
    'kip' 'ninja' 'orco' 'quawks' 'squawks' 'sumo' 'swanky' 'winky')
braswell=('banon' 'celes' 'cyan' 'edgar' 'kefka' 'reks' 'relm' \
    'setzer' 'terra' 'ultima' 'wizpig')
skylake=('asuka' 'caroline' 'cave' 'chell' 'lars' 'lili' 'sentry')
snb_ivb=('butterfly' 'link' 'lumpy' 'parrot' 'stout' 'stumpy')
apl=('astronaut' 'babymega' 'babytiger' 'blacktip' 'blue' 'bruce' 'coral' \
    'electro' 'epaulette' 'lava' 'nasher' 'nasher360' 'pyro' 'rabbid'  'reef' \
	'robo' 'robo360' 'sand' 'santa' 'snappy' 'whitetip')
kbl_boxes=('bleemo' 'fizz' 'jax' 'kench' 'sion' 'teemo' 'wukong')
kbl_rwl_20=('akali' 'bard' 'ekko' 'eve' 'nami' 'nautilus' \
    'pantheon' 'sona' 'soraka' 'syndra' 'vayne')
kbl_rwl_18=('atlas' 'karma' 'leona' 'nocturne' 'rammus' 'shyvana')
kbl=($(printf "%s " "${kbl_boxes[@]}" "${kbl_rwl_20[@]}" "${kbl_rwl_18[@]}"))
purism=('librem13v1' 'librem13v2' 'librem13v4' 'librem15v2' 'librem15v3' 'librem15v4' \
        'librem_mini' 'librem_mini_v2' 'librem_14');
glk=('ampton' 'apel' 'bloog' 'blooglet' 'blooguard' 'blorb' 'bluebird' 'bobba' \
    'bobba360' 'casta' 'dood' 'droid' 'dorp' 'fleex' 'foob' 'foob360' 'garg' \
	'garg360' 'garfour' 'glk' 'glk360' 'grabbiter' 'laser' 'laser14' 'lick' \
	'meep' 'mimrock' 'nospike' 'octopus' 'orbatrix' 'phaser' 'phaser360' \
	'phaser360s' 'sparky' 'sparky360' 'vorticon' 'vortininja')
str=('aleena' 'barla' 'careena' 'grunt' 'kasumi' 'liara' 'treeya' 'treeya360')
whl=('arcada' 'sarien')
cml_boxes=('dooly' 'duffy' 'faffy' 'kaisa' 'noibat' 'puff' 'wyvern')
cml_books=('akemi' 'dragonair' 'drallion' 'dratini' 'hatch' 'helios' 'jinlon' 'kindred' 'kled' 'kohaku' 'nightfury')
cml=($(printf "%s " "${cml_boxes[@]}" "${cml_books[@]}"))
zen2=('berknip' 'dirinboz' 'ezkinil' 'morphius' 'woomax')
jsl=('blipper' 'boten' 'botenflex' 'drawcia' 'drawlat' 'drawman' 'galith' 'gallop' 'galtic' 'kracko' \
     'kracko360' 'lantis' 'madoo' 'magolor' 'magpie' 'magolor' 'sasuke' 'storo' 'storo360')
tgl=('copano' 'delbin' 'drobit' 'eldrid' 'elemi' 'lillipup' 'lindar' 'volet' 'volta' 'voxel')

UEFI_ROMS=($(printf "%s " "${hsw_boxes[@]}" "${hsw_books[@]}" "${bdw_boxes[@]}" \
    "${bdw_books[@]}" "${baytrail[@]}" "${snb_ivb[@]}" "${braswell[@]}" \
    "${skylake[@]}" "${kbl[@]}" "${purism[@]}" "${str[@]}" "${cml[@]}" \
    "${glk[@]}" "${apl[@]}"))
shellballs=($(printf "%s " "${hsw_boxes[@]}" "${hsw_books[@]}" "${bdw_boxes[@]}" \
    "${bdw_books[@]}" "${baytrail[@]}" "${snb_ivb[@]}" "${braswell[@]}" \
    "${skylake[@]}" 'atlas' 'eve' 'nautilus' 'nocturne' 'pantheon' 'sona' 'soraka' \
	'teemo' 'sion' 'vayne' 'careena' 'liara' 'akemi' 'kohaku' 'barla' 'babytiger' \
	'dratini' 'rabbid' 'blooglet'))
runs_windows=($(printf "%s " "${snb_ivb[@]}" "${hsw_boxes[@]}" "${hsw_books[@]}" \
    "${bdw_boxes[@]}" "${bdw_books[@]}" "${baytrail[@]}" "${braswell[@]}" 'eve' \
    "${purism[@]}" "${kbl_boxes[@]}" "${cml_boxes[@]}"))

#menu text output
NORMAL=$(echo "\033[m")
MENU=$(echo "\033[36m") #Blue
NUMBER=$(echo "\033[33m") #yellow
FGRED=$(echo "\033[41m")
RED_TEXT=$(echo "\033[31m")
GRAY_TEXT=$(echo "\033[1;30m")
GREEN_TEXT=$(echo "\033[1;32m")
ENTER_LINE=$(echo "\033[33m")

function echo_red()
{
echo -e "\E[0;31m$1"
echo -e '\e[0m'
}

function echo_green()
{
echo -e "\E[0;32m$1"
echo -e '\e[0m'
}

function echo_yellow()
{
echo -e "\E[1;33m$1"
echo -e '\e[0m'
}

function exit_red()
{
    echo_red "$@"
    read -ep "Press [Enter] to return to the main menu."
}

function die()
{
    echo_red "$@"
    exit 1
}


####################
# list USB devices #
####################
function list_usb_devices()
{
    stat -c %N /sys/block/sd* 2>/dev/null | grep usb | cut -f1 -d ' ' | sed "s/[']//g;s|/sys/block|/dev|" > /tmp/usb_block_devices
    eval usb_devs="($(cat  /tmp/usb_block_devices))"
    [ "$usb_devs" != "" ] || return 1
    echo -e "\nDevices available:\n"
    num_usb_devs=0
    for dev in "${usb_devs[@]}"
    do
    ((num_usb_devs+=1))
    vendor=$(udevadm info --query=all --name=${dev#"/dev/"} | grep -E "ID_VENDOR=" | awk -F"=" '{print $2}')
    model=$(udevadm info --query=all --name=${dev#"/dev/"} | grep -E "ID_MODEL=" | awk -F"=" '{print $2}')
    sz=$(fdisk -l 2> /dev/null | grep "Disk ${dev}" | awk '{print $3}')
    echo -n "$num_usb_devs)"
    if [ -n "${vendor}" ]; then
        echo -n " ${vendor}"
    fi
    if [ -n "${model}" ]; then
        echo -n " ${model}"
    fi
    echo -e " (${sz} GB)"
    done
    echo -e ""
    return 0
}


################
# Get cbfstool #
################
function get_cbfstool()
{
if [ ! -f ${cbfstoolcmd} ]; then
    working_dir=$(pwd)
    if [[ "$isChromeOS" = false && "$isChromiumOS" = false ]]; then
        cd /tmp
    else
        #have to use partition 12 (27 for cloudready) on rootdev due to noexec restrictions
        rootdev=$(rootdev -d -s)
		[[ "${rootdev}" =~ "mmcblk" || "${rootdev}" =~ "nvme" ]] && part_pfx="p" || part_pfx=""
        [[ "$isCloudready" = "true" && -b ${rootdev}${part_pfx}27 ]] \
				&& part_num="${part_pfx}27" || part_num="${part_pfx}12"
        boot_mounted=$(mount | grep "${rootdev}""${part_num}")
        if [ "${boot_mounted}" = "" ]; then
            #mount boot
            mkdir /tmp/boot >/dev/null 2>&1
            mount "$(rootdev -d -s)""${part_num}" /tmp/boot
            if [ $? -ne 0 ]; then
                echo_red "Error mounting boot partition; cannot proceed."
                return 1
            fi
        fi
		# clear recovery logs which use valuable space
		rm -rf /tmp/boot/recovery* 2>/dev/null
        #create util dir
        mkdir /tmp/boot/util 2>/dev/null
        cd /tmp/boot/util
    fi

    #echo_yellow "Downloading cbfstool utility"
    $CURL -sLO "${util_source}cbfstool.tar.gz"
    if [ $? -ne 0 ]; then
        echo_red "Error downloading cbfstool; cannot proceed."
        #restore working dir
        cd ${working_dir}
        return 1
    fi
    tar -zxf cbfstool.tar.gz --no-same-owner
    if [ $? -ne 0 ]; then
        echo_red "Error extracting cbfstool; cannot proceed."
        #restore working dir
        cd ${working_dir}
        return 1
    fi
    #set +x
    chmod +x cbfstool
    #restore working dir
    cd ${working_dir}
fi
return 0
}


################
# Get flashrom #
################
function get_flashrom()
{
if [ ! -f ${flashromcmd} ]; then
    working_dir=`pwd`
 
    if [[ "$isChromeOS" = false && "$isChromiumOS" = false ]]; then
        cd /tmp
    else
        #have to use partition 12 (27 for cloudready) on rootdev due to noexec restrictions
        rootdev=$(rootdev -d -s)
		[[ "${rootdev}" =~ "mmcblk" || "${rootdev}" =~ "nvme" ]] && part_pfx="p" || part_pfx=""
        [[ "$isCloudready" = "true" && -b ${rootdev}${part_pfx}27 ]] \
				&& part_num="${part_pfx}27" || part_num="${part_pfx}12"
        boot_mounted=$(mount | grep "${rootdev}""${part_num}")
        if [ "${boot_mounted}" = "" ]; then
            #mount boot
            mkdir /tmp/boot >/dev/null 2>&1
            mount "$(rootdev -d -s)""${part_num}" /tmp/boot
            if [ $? -ne 0 ]; then
                echo_red "Error mounting boot partition; cannot proceed."
                return 1
            fi
        fi
		# clear recovery logs which use valuable space
		rm -rf /tmp/boot/recovery* 2>/dev/null
        #create util dir
        mkdir /tmp/boot/util 2>/dev/null
        cd /tmp/boot/util
    fi

    if [[ "$isChromeOS" = true ]]; then
        #needed to avoid dependencies not found on older ChromeOS
        $CURL -sLo "flashrom.tar.gz" "${util_source}flashrom_old.tar.gz"
    else
        $CURL -sLO "${util_source}flashrom.tar.gz"
    fi
    if [ $? -ne 0 ]; then
        echo_red "Error downloading flashrom; cannot proceed."
        #restore working dir
        cd ${working_dir}
        return 1
    fi
    tar -zxf flashrom.tar.gz --no-same-owner
    if [ $? -ne 0 ]; then
        echo_red "Error extracting flashrom; cannot proceed."
        #restore working dir
        cd ${working_dir}
        return 1
    fi
    #set +x
    chmod +x flashrom
    #add params
    flashromcmd="${flashromcmd} ${flashrom_params}"
    #restore working dir
    cd ${working_dir}
fi
return 0
}


###################
# Get gbb_utility #
###################
function get_gbb_utility()
{
if [ ! -f ${gbbutilitycmd} ]; then
    working_dir=`pwd`
    cd /tmp

    $CURL -sLO "${util_source}gbb_utility.tar.gz"
    if [ $? -ne 0 ]; then
        echo_red "Error downloading gbb_utility; cannot proceed."
        #restore working dir
        cd ${working_dir}
        return 1
    fi
    tar -zxf gbb_utility.tar.gz
    if [ $? -ne 0 ]; then
        echo_red "Error extracting gbb_utility; cannot proceed."
        #restore working dir
        cd ${working_dir}
        return 1
    fi
    #set +x
    chmod +x gbb_utility
    #restore working dir
    cd ${working_dir}
fi
return 0
}


################
# Prelim Setup #
################

function prelim_setup()
{

# Must run as root
[ "$(whoami)" = "root" ] || die "You need to run this script as root; use 'sudo bash <script name>'"

#must be x86_64
[ "$(uname -m)"  = 'x86_64' ] \
    || die "This script only supports 64-bit OS on Intel-based devices; ARM devices are not supported."

#check for required tools
which dmidecode > /dev/null 2>&1
if [ $? -ne 0 ]; then
    echo_red "Required package 'dmidecode' not found; cannot continue.  Please install and try again."
    return 1
fi
which tar > /dev/null 2>&1
if [ $? -ne 0 ]; then
    echo_red "Required package 'tar' not found; cannot continue.  Please install and try again."
    return 1
fi
which md5sum > /dev/null 2>&1
if [ $? -ne 0 ]; then
    echo_red "Required package 'md5sum' not found; cannot continue.  Please install and try again."
    return 1
fi


#get device name
device=$(dmidecode -s system-product-name | tr '[:upper:]' '[:lower:]' | sed 's/ /_/g' | awk 'NR==1{print $1}')
if [[ $? -ne 0 || "${device}" = "" ]]; then
    echo_red "Unable to determine Chromebox/book model; cannot continue."
    echo_red "It's likely you are using an unsupported ARM-based ChromeOS device,\nonly Intel-based devices are supported at this time."
    return 1
fi

#check if running under ChromeOS / ChromiumOS
if [ -f /etc/lsb-release ]; then
    cat /etc/lsb-release | grep "Chrome OS" > /dev/null 2>&1
    if [ $? -ne 0 ]; then
        isChromeOS=false
    fi
    cat /etc/lsb-release | grep "neverware" > /dev/null 2>&1
    if [ $? -eq 0 ]; then
        isCloudready=true
    fi
    cat /etc/lsb-release | grep "Chromium OS" > /dev/null 2>&1
    if [ $? -eq 0 ]; then
        isChromiumOS=true
    fi
else
    isChromeOS=false
    isChromiumOS=false
fi

if [[ "$isChromeOS" = true || "$isChromiumOS" = true ]]; then
    #disable power mgmt
    initctl stop powerd > /dev/null 2>&1
    #set cmds
    #check if we need to use a newer flashrom which supports output to log file (-o)
    flashromcmd=$(which flashrom)
    ${flashromcmd} -V -o /dev/null > /dev/null 2>&1
    [[ $? -ne 0 || -d /sys/firmware/efi ]] && flashromcmd=/tmp/boot/util/flashrom  
    cbfstoolcmd=/tmp/boot/util/cbfstool
    gbbutilitycmd=$(which gbb_utility)
else
    #set cmds
    flashromcmd=/tmp/flashrom
    cbfstoolcmd=/tmp/cbfstool
    gbbutilitycmd=/tmp/gbb_utility
fi

#start with a known good state
cleanup

#get required tools
get_flashrom
if [ $? -ne 0 ]; then
    echo_red "Unable to download flashrom utility; cannot continue"
    return 1
fi
get_cbfstool
if [ $? -ne 0 ]; then
    echo_red "Unable to download cbfstool utility; cannot continue"
    return 1
fi
get_gbb_utility
if [ $? -ne 0 ]; then
    echo_red "Unable to download gbb_utility utility; cannot continue"
    return 1
fi

#get device firmware info
echo -e "\nGetting device/system info..."
#read entire firmware
${flashromcmd} -r /tmp/bios.bin > /dev/null 2>&1
if [ $? -ne 0 ]; then
    echo_red "\nUnable to read current firmware; cannot continue."
    echo_red "Either add 'iomem=relaxed' to your kernel parameters,\nor trying running from a Live USB with a more permissive kernel (eg, Ubuntu)."
    echo_red "See https://www.flashrom.org/FAQ for more info."
    return 1;
fi

# check firmware type
${cbfstoolcmd} /tmp/bios.bin layout -w > /tmp/layout 2>/dev/null
if grep "RW_VPD" /tmp/layout >/dev/null 2>&1; then
  # stock firmware
  isStock=true
  firmwareType="Stock ChromeOS"
  # check BOOT_STUB
  if grep "BOOT_STUB" /tmp/layout >/dev/null 2>&1; then
    if ! ${cbfstoolcmd} /tmp/bios.bin print -r BOOT_STUB 2>/dev/null | grep -e "vboot" >/dev/null 2>&1 ; then
        [[ "${device^^}" != "LINK" ]] && firmwareType="Stock w/modified BOOT_STUB"
    fi
  fi
  # check RW_LEGACY
  if ${cbfstoolcmd} /tmp/bios.bin print -r RW_LEGACY 2>/dev/null | grep -e "payload" -e "altfw" >/dev/null 2>&1 ; then
    firmwareType="Stock ChromeOS w/RW_LEGACY"
  fi
else
    # non-stock firmware
    isStock=false
    isFullRom=true
    if [[ -d /sys/firmware/efi ]]; then
        isUEFI=true
        firmwareType="Full ROM / UEFI"
    else
        firmwareType="Full ROM / Legacy"
    fi
fi
# firmware date/version
fwVer=$(dmidecode -s bios-version)
fwDate=$(dmidecode -s bios-release-date)

#check WP status

#save SW WP state
${flashromcmd} --wp-status 2>&1 | grep enabled >/dev/null
[[ $? -eq 0 ]] && swWp="enabled" || swWp="disabled"
#test disabling SW WP to see if HW WP enabled
${flashromcmd} --wp-disable > /dev/null 2>&1
[[ $? -ne 0 ]] && wpEnabled=true
#restore previous SW WP state
[[ ${swWp} = "enabled" ]] && ${flashromcmd} --wp-enable > /dev/null 2>&1

#get full device info
if [[ "$isChromeOS" = true && ! -d /sys/firmware/efi ]]; then
    _hwid=$(crossystem hwid | sed 's/ /_/g')
    boardName=$(crossystem hwid | sed 's/X86//g' | awk 'NR==1{print $1}' | cut -f 1 -d'-')
	device=${boardName,,}
elif echo $firmwareType | grep -e "Stock" -e "LEGACY"; then
	# Stock + RW_LEGACY: read HWID from GBB
	_hwid=$($gbbutilitycmd --get --hwid /tmp/bios.bin | sed 's/X86//g' | cut -f 2 -d' ')
	boardName=${_hwid^^}
else
    _hwid=${device^^}
    boardName=${device^^}
fi

case "${_hwid}" in
    ACER_ZGB*)              _x='PNV|Acer AC700 Chromebook' ;;
    AKALI*)                 _x='KBL|Acer Chromebook 13 / Spin 13' ; device="nami";;
    AKEMI*)                 _x='CML|Lenovo Ideapad Flex 5 Chromebook' ;;
    ALEENA*)                _x='STR|Acer Chromebook 315' ;;
    AMPTON*)                _x='GLK|Asus Chromebook Flip C214' ;;
    APEL*)                  _x='GLK|Asus Chromebook Flip C204' ;;
    ARCADA*)                _x='WHL|Dell Latitude 5300' ; device="sarien";;
    ASTRONAUT*)             _x='APL|Acer Chromebook 11 (C732*)' ;;
    ASUKA*)                 _x='SKL|Dell Chromebook 13 (3380)' ;;
    ATLAS*)                 _x='KBL|Google Pixelbook Go' ;;
    AURON_PAINE*)           _x='BDW|Acer Chromebook 11 (C740)' ;;
    AURON_YUNA*)            _x='BDW|Acer Chromebook 15 (CB5-571, C910)' ;;
    BABYMEGA*)              _x='APL|Asus Chromebook C223NA' ;;
    BABYTIGER*)             _x='APL|Asus Chromebook C523NA' ;;
    BANJO*)                 _x='BYT|Acer Chromebook 15 (CB3-531)' ;;
    BANON*)                 _x='BSW|Acer Chromebook 15 (CB3-532)' ;;
    BARD*)                  _x='KBL|Acer Chromebook 715 (CB715)' ; device="nami";;
    BARLA*)                 _x='STR|HP Chromebook 11A G6 EE' ;;
    BERKNIP*)               _x='ZEN2|HP Pro c645 Chromebook Enterprise' ;;
    BLACKTIP*)              _x='APL|White Label Chrombook' ;;
    BLEEMO*)                _x='KBL|Asus Chromebox 3 / CN65 (Core i7)' ; device="fizz";;
    BLIPPER*)               _x='JSL|Lenovo 3i-15 Chromebook	';;
    BLOOGLET*)              _x='GLK|HP Chromebook 14a';;
    BLOOGUARD*)             _x='GLK|HP Chromebook x360 14b';;
    BLOOG*)                 _x='GLK|HP Chromebook x360 12b';;
    BLORB*)                 _x='GLK|Acer Chromebook 315';;
    BLUEBIRD*)              _x='GLK|Samsung Chromebook 4' ;;
    BOBBA360*)              _x='GLK|Acer Chromebook Spin 511' ;;
    BOBBA*)                 _x='GLK|Acer Chromebook 311' ;;
    BOTENFLEX*)             _x='JSL|Lenovo Flex 3i/3i-11 Chromebook' ;;
    BOTEN*)                 _x='JSL|Lenovo 500e Chromebook 2nd Gen' ;;
    BUDDY*)                 _x='BDW|Acer Chromebase 24' ;;
    BUTTERFLY*)             _x='SNB|HP Pavilion Chromebook 14' ;;
    CANDY*)                 _x='BYT|Dell Chromebook 11' ;;
    CAREENA*)               _x='STR|HP Chromebook 14' ;;
    CAROLINE*)              _x='SKL|Samsung Chromebook Pro' ;;
    CASTA*)                 _x='GLK|Samsung Chromebook 4+';;
    CAVE*)                  _x='SKL|ASUS Chromebook Flip C302' ;;
    CELES*)                 _x='BSW|Samsung Chromebook 3' ;;
    CHELL*)                 _x='SKL|HP Chromebook 13 G1' ;;
    CLAPPER*)               _x='BYT|Lenovo N20/N20P Chromebook' ;;
    COPANO*)                _x='TGL|Asus xxx Chromebook' ;;
    CYAN*)                  _x='BSW|Acer Chromebook R11 (C738T)' ;;
    DELBIN*)                _x='TGL|ASUS Chromebook Flip CX5' ;;
    DIRINBOZ*)              _x='ZEN2|HP Chromebook 14a' ;;
    DOOLY*)                 _x='CML|HP Chromebase 21.5' ;;
	DRAGONAIR*)             _x='CML|HP Chromebook x360 14c' ;;
    DRALLION*)              _x='CML|Dell Latitude 7410 Chromebook Enterprise' ;;
    DRATINI*)               _x='CML|HP Pro c640 Chromebook' ;;
    DRAWCIA*)               _x='JSL|HP Chromebook x360 11 G4 EE' ;;
    DRAWLAT*)               _x='JSL|HP Chromebook 11 G9 EE' ;;
    DRAWMAN*)               _x='JSL|HP Chromebook 14 G7' ;;
    DROBIT*)                _x='TGL|ASUS Chromebook CX9400' ;;
    DROID*)                 _x='GLK|Acer Chromebook 314';;
    DUFFY*)                 _x='CML|ASUS Chromebox 4' ;;
    EDGAR*)                 _x='BSW|Acer Chromebook 14 (CB3-431)' ;;
    EKKO*)                  _x='KBL|Acer Chromebook 714 (CB714)' ; device="nami";;
    ELDRID*)                _x='TGL|HP Chromebook x360 14c' ;;
    ELECTRO*)               _x='APL|Acer Chromebook Spin 11 (R751T)' ;;
    ELEMI*)                 _x='TGL|HP Pro c640 G2 Chromebook' ;;
    ENGUARDE_???-???-??A*)  _x='BYT|CTL N6 Education Chromebook' ;;
    ENGUARDE_???-???-??B*)  _x='BYT|M&A Chromebook' ;;
    ENGUARDE_???-???-??C*)  _x='BYT|Senkatel C1101 Chromebook' ;;
    ENGUARDE_???-???-??D*)  _x='BYT|Edxis Education Chromebook' ;;
    ENGUARDE_???-???-??E*)  _x='BYT|Lenovo N21 Chromebook' ;;
    ENGUARDE_???-???-??F*)  _x='BYT|RGS Education Chromebook' ;;
    ENGUARDE_???-???-??G*)  _x='BYT|Crambo Chromebook' ;;
    ENGUARDE_???-???-??H*)  _x='BYT|True IDC Chromebook' ;;
    ENGUARDE_???-???-??I*)  _x='BYT|Videonet Chromebook' ;;
    ENGUARDE_???-???-??J*)  _x='BYT|eduGear Chromebook R' ;;
    ENGUARDE_???-???-??K*)  _x='BYT|ASI Chromebook' ;;
    ENGUARDE*)              _x='BYT|(multiple device matches)' ;;
    EPAULETTE*)             _x='APL|UNK Acer Chromebook ' ;;
    EVE*)                   _x='KBL|Google Pixelbook' ;;
    EZKINIL*)               _x='ZEN2|Acer Chromebook Spin 514' ;;
    FAFFY*)                 _x='CML|ASUS Fanless Chromebox' ;;
    FALCO*)                 _x='HSW|HP Chromebook 14' ;;
    FIZZ)                   _x='KBL|TBD KBL Chromebox' ;;
    FLEEX*)                 _x='GLK|Dell Chromebook 3100';;
    GALITH*)                _x='JSL|ASUS Chromebook CX1500CKA' ;;
    GALLOP*)                _x='JSL|ASUS Chromebook CX1700CKA' ;;
    GANDOF*)                _x='BDW|Toshiba Chromebook 2 (2015) CB30/CB35' ;;
    GLIMMER*)               _x='BYT|Lenovo ThinkPad 11e/Yoga Chromebook' ;;
    GLK360*)                _x='GLK|Acer Chromebook Spin 311';;
    GLK*)                   _x='GLK|Acer Chromebook 311';;
    GNAWTY*)                _x='BYT|Acer Chromebook 11 (CB3-111/131,C730/C730E/C735)' ;;
    GRABBITER*)             _x='GLK|Dell Chromebook 3100 2-in-1';;
    GUADO*)                 _x='BDW|ASUS Chromebox 2 / CN62' ;;
    HELIOS*)                _x='CML|ASUS Chromebook Flip C436FA' ;;
    HELI*)                  _x='BYT|Haier Chromebook G2' ;;
    IEC_MARIO)              _x='PNV|Google Cr-48' ;;
    JAX*)                   _x='KBL|AOpen Chromebox Commercial 2' ; device="fizz";;
    JINLON*)                _x='CML|HP Elite c1030 Chromebook / HP Chromebook x360 13c';;
    KAISA*)                 _x='CML|Acer Chromebox CXI4' ;;
    KARMA*)                 _x='KBL|Acer Chromebase 24I2' ;;
    KASUMI*)                _x='STR|Acer Chromebook 311' ; device="kasumi";;
    KEFKA*)                 _x='BSW|Dell Chromebook 11 (3180,3189)' ;;
    KENCH*)                 _x='KBL|HP Chromebox G2' ; device="fizz";;
    KINDRED*)               _x='CML|Acer Chromebook 712 (C871)' ;;
    KIP*)                   _x='BYT|HP Chromebook 11 G3/G4, 14 G4' ;;
    KLED*)                  _x='CML|Acer Chromebook Spin 713 (CP713-2W)' ;;
    KOHAKU*)                _x='CML|Samsung Galaxy Chromebook' ;;
    KRACKO-WPBT*)           _x='JSL|CTL Chromebook NL72' ;;
    KRACKO360-BLXA*)        _x='JSL|CTL Chromebook NL72T' ;;
    KRACKO360*)             _x='JSL|LG Chromebook 11TC50Q/11TQ50Q' ;;
    LANTIS-MEXL*)           _x='JSL|HP Chromebook 14a' ;;
    LARS_???-???-???-?3?*)  _x='SKL|Acer Chromebook 11 (C771, C771T)' ;;
    LARS*)                  _x='SKL|Acer Chromebook 14 for Work' ;;
    LASER14*)               _x='GLK|Lenovo Chromebook S340';;
    LASER*)                 _x='GLK|Lenovo Chromebook C340';;
    LAVA*)                  _x='APL|Acer Chromebook Spin 11 CP311' ;;
    LEONA*)                 _x='KBL|Asus Chromebook C425TA' ;;
    LEON*)                  _x='HSW|Toshiba CB30/CB35 Chromebook' ;;
    LIARA*)                 _x='STR|Lenovo 14e Chromebook' ;;
    LIBREM_13_V1)           _x='BDW|Purism Librem 13 v1' ; device="librem13v1";;
    LIBREM13V1)             _x='BDW|Purism Librem 13 v1' ;;
    LIBREM_13_V2)           _x='SKL|Purism Librem 13 v2' ; device="librem13v2";;
    LIBREM13V2)             _x='SKL|Purism Librem 13 v2' ;;
    LIBREM_13_V3)           _x='SKL|Purism Librem 13 v3' ; device="librem13v2";;
    LIBREM13V3)             _x='SKL|Purism Librem 13 v3' ;;
    LIBREM_13_V4)           _x='KBL|Purism Librem 13 v4' ; device="librem13v4";;
    LIBREM13V4)             _x='KBL|Purism Librem 13 v4' ;;
    LIBREM_14)              _x='CML|Purism Librem 14' ; device="librem_14";;
    LIBREM_15_V2)           _x='BDW|Purism Librem 15 v2' ; device="librem15v2";;
    LIBREM15V2)             _x='BDW|Purism Librem 15 v2' ;;
    LIBREM_15_V3)           _x='SKL|Purism Librem 15 v3' ; device="librem15v3";;
    LIBREM15V3)             _x='SKL|Purism Librem 15 v3' ;;
    LIBREM_15_V4)           _x='KBL|Purism Librem 15 v4' ; device="librem15v4";;
    LIBREM15V4)             _x='KBL|Purism Librem 15 v4' ;;
    LIBREM_MINI)            _x='WHL|Purism Librem Mini' ; device="librem_mini";;
    LIBREM_MINI_V2)         _x='CML|Purism Librem Mini v2' ; device="librem_mini_v2";;
    LICK*)                  _x='GLK|Lenovo Ideapad 3 Chromebook' ;;
    LILLIPUP*)              _x='TGL|Lenovo IdeaPad Flex 5i Chromebook' ;;
	LINDAR-EDFZ*)           _x='TGL|Lenovo 5i-14 Chromebook' ;;
	LINDAR-LCDF*)           _x='TGL|Lenovo Slim 5 Chromebook' ;;
    LINK*)                  _x='IVB|Google Chromebook Pixel 2013' ;;
    LULU*)                  _x='BDW|Dell Chromebook 13 (7310)' ;;
    MADOO*)                 _x='JSL|HP Chromebook x360 14b' ;;
	MAGOLOR*)               _x='JSL| Acer Chromebook Spin 511 [R753T]' ;;
    MAGPIE*)                _x='JSL|Acer Chromebook 317 [CB317-1H]' ;;
    LUMPY*)                 _x='SNB|Samsung Chromebook Series 5 550' ;;
    MCCLOUD*)               _x='HSW|Acer Chromebox CXI' ;;
    MEEP*)                  _x='GLK|HP Chromebook x360 11 G2 EE' ;;
    MIMROCK*)               _x='GLK|HP Chromebook 11 G7 EE' ;;
    MONROE*)                _x='HSW|LG Chromebase' ;;
    MORPHIUS*)              _x='ZEN2|Lenovo ThinkPad C13 Yoga Chromebook' ;;
    NAUTILUS*)              _x='KBL|Samsung Chromebook Plus V2' ;;
    NASHER360*)             _x='APL|Dell Chromebook 11 2-in-1 5190' ;;
    NASHER*)                _x='APL|Dell Chromebook 11 5190' ;;
    NIGHTFURY*)             _x='CML|Samsung Galaxy Chromebook 2' ;;
    NINJA*)                 _x='BYT|AOpen Chromebox Commercial' ;;
    NOCTURNE*)              _x='KBL|Google Pixel Slate' ;;
    NOIBAT*)                _x='CML|HP Chromebox G3' ;;
    ORCO*)                  _x='BYT|Lenovo Ideapad 100S Chromebook' ;;
    ORBATRIX*)              _x='GLK|Dell Chromebook 3400';;
    PAINE*)                 _x='BDW|Acer Chromebook 11 (C740)' ; device="auron_paine";;
    PANTHEON*)              _x='KBL|Lenovo Yoga Chromebook C630'  ; device="nami";;
    PANTHER*)               _x='HSW|ASUS Chromebox CN60' ;;
    PARROT*)                _x='SNB|Acer C7/C710 Chromebook' ;;
    PEPPY*)                 _x='HSW|Acer C720/C720P Chromebook' ;;
    PHASER360S*)            _x='GLK|Lenovo 500e Chromebook 2nd Gen' ;;
    PHASER360*)             _x='GLK|Lenovo 300e Chromebook 2nd Gen' ;;
    PHASER*)                _x='GLK|Lenovo 100e Chromebook 2nd Gen' ;;
    PYRO*)                  _x='APL|Lenovo Thinkpad 11e/Yoga Chromebook (G4)' ;;
    QUAWKS*)                _x='BYT|ASUS Chromebook C300' ;;
    RABBID*)                _x='APL|ASUS Chromebook C423' ;;
    RAMMUS*)                _x='KBL|Asus Chromebook C425/C433/C434' ;;
    REEF_???-C*)            _x='APL|ASUS Chromebook C213NA' ;;
    REEF*)                  _x='APL|Acer Chromebook Spin 11 (R751T)' ; device="electro";;
    REKS_???-???-???-B*)    _x='BSW|2016|Lenovo N42 Chromebook' ;;
    REKS_???-???-???-C*)    _x='BSW|2017|Lenovo N23 Chromebook (Touch)';;
    REKS_???-???-???-D*)    _x='BSW|2017|Lenovo N23 Chromebook' ;;
    REKS_???-???-???-*)     _x='BSW|2016|Lenovo N22 Chromebook' ;;
    REKS*)                  _x='BSW|2016|(unknown REKS)' ;;
    RELM_???-B*)            _x='BSW|CTL NL61 Chromebook' ;;
    RELM_???-C*)            _x='BSW|Edxis Education Chromebook' ;;
    RELM_???-F*)            _x='BSW|Mecer V2 Chromebook' ;;
    RELM_???-G*)            _x='BSW|HP Chromebook 11 G5 EE' ;;
    RELM_???-H*)            _x='BSW|Acer Chromebook 11 N7 (C731)' ;;
    RELM_???-Z*)            _x='BSW|Quanta OEM Chromebook' ;;
    RELM*)                  _x='BSW|(unknown RELM)' ;;
    RIKKU*)                 _x='BDW|Acer Chromebox CXI2' ;;
    ROBO360*)               _x='APL|Lenovo 500e Chromebook' ;;
    ROBO*)                  _x='APL|Lenovo 100e Chromebook' ;;
    SAMUS*)                 _x='BDW|Google Chromebook Pixel 2015' ;;
    SAND*)                  _x='APL|Acer Chromebook 15 (CB515-1HT)' ;;
    SANTA*)                 _x='APL|Acer Chromebook 11 (CB311-8H)' ;;
    SARIEN*)                _x='WHL|Dell Latitude 5400' ;;
    SASUKE*)                _x='JSL|Samsung Galaxy Chromebook Go' ;;
    SENTRY*)                _x='SKL|Lenovo Thinkpad 13 Chromebook' ;;
    SETZER*)                _x='BSW|HP Chromebook 11 G5' ;;
    SHYVANA*)               _x='KBL|Asus Chromebook Flip C433/C434' ;;
    SION*)                  _x='KBL|Acer Chromebox CXI3' ; device="fizz";;
    SNAPPY_???-A*)          _x='APL|HP Chromebook x360 11 G1 EE' ;;
    SNAPPY_???-B*)          _x='APL|HP Chromebook 11 G6 EE' ;;
    SNAPPY_???-C*)          _x='APL|HP Chromebook 14 G5' ;;
    SNAPPY*)                _x='APL|HP Chromebook x360 11 G1/11 G6/14 G5' ;;
    SPARKY*)                _x='GLK|Acer Chromebook 512 (C851/C851T)' ;;
    SONA*)                  _x='KBL|HP Chromebook x360 14' ; device="nami";;
    SORAKA*)                _x='KBL|HP Chromebook x2' ;;
    SQUAWKS*)               _x='BYT|ASUS Chromebook C200' ;;
    STORO360*)              _x='JSL|ASUS Chromebook CR1100CKA' ;;
    STORO*)                 _x='JSL|ASUS Chromebook Flip CR1100FKA' ;;
    STOUT*)                 _x='IVB|Lenovo Thinkpad X131e Chromebook' ;;
    STUMPY*)                _x='SNB|Samsung Chromebox Series 3' ;;
    SUMO*)                  _x='BYT|AOpen Chromebase Commercial' ;;
    SWANKY*)                _x='BYT|Toshiba Chromebook 2 (2014) CB30/CB35' ;;
    SYNDRA*)                _x='KBL|HP Chromebook 15 G1' ; device="nami";;
    TEEMO*)                 _x='KBL|Asus Chromebox 3 / CN65' ; device="fizz";;
    TERRA_???-???-???-A*)   _x='BSW|ASUS Chromebook C202SA' ;;
    TERRA_???-???-???-B*)   _x='BSW|ASUS Chromebook C300SA/C301SA' ;;
    TERRA*)                 _x='BSW|ASUS Chromebook C202SA, C300SA/C301SA' ; device="terra";;
    TIDUS*)                 _x='BDW|Lenovo ThinkCentre Chromebox' ;;
    TREEYA360*)             _x='STR|Lenovo 300e Chromebook 2nd Gen AMD' ; device="treeya";;
    TREEYA*)                _x='STR|Lenovo 100e Chromebook 2nd Gen AMD' ; device="treeya";;
    TRICKY*)                _x='HSW|Dell Chromebox 3010' ;;
    ULTIMA*)                _x='BSW|Lenovo ThinkPad 11e/Yoga Chromebook (G3)' ;;
    VAYNE*)                 _x='KBL|Dell Inspiron Chromebook 14 (7486)'  ; device="nami";;
    VOLET*)                 _x='TGL| Acer Chromebook 515 (CB515-1W)' ;;
	VOLTA*)                 _x='TGL|Acer Chromebook 514 (CB514-1H)' ;;
	VORTICON*)              _x='GLK|HP Chromebook 11 G8 EE' ;;
	VORTININJA*)            _x='GLK|HP Chromebook x360 11 G3 EE' ;;
    VOXEL*)                 _x='TGL|Acer Chromebook Spin 713 (CP713-3W)' ;;
    WHITETIP*)              _x='APL|CTL Chromebook J41/J41T' ;;
    WINKY*)                 _x='BYT|Samsung Chromebook 2 (XE500C12)' ;;
    WIZPIG_???-???-??A*)    _x='BSW|CTL Chromebook J5' ;;
    WIZPIG_???-???-??B*)    _x='BSW|Edugear CMT Chromebook' ;;
    WIZPIG_???-???-??C*)    _x='BSW|Haier Convertible Chromebook 11 C' ;;
    WIZPIG_???-???-??D*)    _x='BSW|Viglen Chromebook 360' ;;
    WIZPIG_???-???-??G*)    _x='BSW|Prowise ProLine Chromebook' ;;
    WIZPIG_???-???-??H*)    _x='BSW|PCMerge Chromebook PCM-116T-432B' ;;
    WIZPIG_???-???-??I*)    _x='BSW|Multilaser M11C Chromebook' ;;
    WIZPIG*)                _x='BSW|(unknown WIZPIG)' ;;
    WOLF*)                  _x='HSW|Dell Chromebook 11' ;;
    WOOMAX*)                _x='ZEN2|ASUS Chromebook Flip CM5' ;;
    WUKONG_???-???-???-??C*) _x='KBL|ViewSonic NMP660 Chromebox' ; device="fizz";;
    WUKONG*)                _x='KBL|CTL Chromebox CBx1' ; device="fizz";;
    WYVERN*)                _x='CML|CTL Chromebox CBx2' ;;
    YUNA*)                  _x='BDW|Acer Chromebook 15 (CB5-571, C910)' ; device="auron_yuna";;
    ZAKO*)                  _x='HSW|HP Chromebox CB1' ;;
esac

deviceCpuType=$(echo $_x | cut -d\| -f1)
deviceDesc=$(echo $_x | cut -d\| -f2-)

## CPU family, Processor core, other distinguishing characteristic
case "$deviceCpuType" in
ARM) deviceCpuType="ARM" ;;
PNV) deviceCpuType="Intel Pineview" ;;
SNB) deviceCpuType="Intel SandyBridge" ;;
IVB) deviceCpuType="Intel IvyBridge" ;;
HSW) deviceCpuType="Intel Haswell" ;;
BYT) deviceCpuType="Intel BayTrail" ;;
BDW) deviceCpuType="Intel Broadwell" ;;
BSW) deviceCpuType="Intel Braswell" ;;
SKL) deviceCpuType="Intel Skylake" ;;
APL) deviceCpuType="Intel ApolloLake" ;;
KBL) deviceCpuType="Intel KabyLake" ;;
GLK) deviceCpuType="Intel GeminiLake" ;;
STR) deviceCpuType="AMD StoneyRidge" ;;
WHL) deviceCpuType="Intel WhiskeyLake" ;;
CML) deviceCpuType="Intel CometLake" ;;
ZEN2) deviceCpuType="AMD Zen2/Picasso" ;;
JSL) deviceCpuType="Intel JasperLake" ;;
TGL) deviceCpuType="Intel TigerLake" ;;
*)   deviceCpuType="(unrecognized)" ;;
esac

[[ "${hsw_boxes[@]}" =~ "$device" ]] && isHswBox=true
[[ "${hsw_books[@]}" =~ "$device" ]] && isHswBook=true
[[  "$isHswBox" = true || "$isHswBook" = true ]] && isHsw=true
[[ "${bdw_boxes[@]}" =~ "$device" ]] && isBdwBox=true
[[ "${bdw_books[@]}" =~ "$device" ]] && isBdwBook=true
[[  "$isBdwBox" = true || "$isBdwBook" = true ]] && isBdw=true
[[ "${baytrail[@]}" =~ "$device" ]] && isByt=true
[[ "${braswell[@]}" =~ "$device" ]] && isBsw=true
[[ "${skylake[@]}" =~ "$device" ]] && isSkl=true
[[ "${snb_ivb[@]}" =~ "$device" ]] && isSnbIvb=true
[[ "${apl[@]}" =~ "$device" ]] && isApl=true
[[ "${kbl_rwl_18[@]}" =~ "$device" ]] && kbl_use_rwl18=true
[[ "${kbl[@]}" =~ "$device" ]] && isKbl=true
[[ "${glk[@]}" =~ "$device" ]] && isGlk=true
[[ "${str[@]}" =~ "$device" ]] && isStr=true
[[ "${whl[@]}" =~ "$device" ]] && isWhl=true
[[ "${cml[@]}" =~ "$device" ]] && isCml=true
[[ "${zen2[@]}" =~ "$device" ]] && isZen2=true
[[ "${jsl[@]}" =~ "$device" ]] && isJsl=true
[[ "${tgl[@]}" =~ "$device" ]] && isTgl=true
[[ "${cml_boxes[@]}" =~ "$device" ]] && isCmlBox=true
[[ "${shellballs[@]}" =~ "${boardName,,}" ]] && hasShellball=true
[[ "${UEFI_ROMS[@]}" =~ "$device" ]] && hasUEFIoption=true
[[ "$isHsw" = true || "$isBdw" = true || "$isByt" = true || "$isBsw" = true \
    || "$isSkl" = true || "$isSnbIvb" = true || "$isApl" = true \
    || "$isKbl" = true || "$isStr" = true || "$isWhl" = true \
    || "$isGlk" = true || "$isCml" = true || "$isZen2" = true \
    || "$isJsl" = true || "$isTgl" = true ]] || isUnsupported=true
[[ "$isHswBox" = true || "$isBdwBox" = true || "${kbl_boxes[@]}" =~ "$device" \
    || "$device" = "ninja" || "$device" = "buddy" ]] && hasLAN=true
[[ "$isKbl" = true || "$isApl" = true || "$isGlk" = true ]] && hasCR50=true
[[ "$device" = "rammus" || "$isGlk" = true ]] && useAltfwStd=true
[[ "${runs_windows[@]}" =~ "$device" ]] && runsWindows=true

return 0
}


###########
# Cleanup #
###########
function cleanup()
{
#remove temp files, unmount temp stuff
if [ -d /tmp/boot/util ]; then
    rm -rf /tmp/boot/util > /dev/null 2>&1
fi
umount /tmp/boot > /dev/null 2>&1
umount /tmp/Storage > /dev/null 2>&1
umount /tmp/System > /dev/null 2>&1
umount /tmp/urfs/proc > /dev/null 2>&1
umount /tmp/urfs/dev/pts > /dev/null 2>&1
umount /tmp/urfs/dev > /dev/null 2>&1
umount /tmp/urfs/sys > /dev/null 2>&1
umount /tmp/urfs > /dev/null 2>&1
umount /tmp/usb > /dev/null 2>&1
}