void-mklive/installer.sh.in

#!/bin/sh
#-
# Copyright (c) 2012 Juan Romero Pardines <xtraeme@gmail.com>.
#               2012 Dave Elusive <davehome@redthumb.info.tm>.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#-

# Make sure we don't inherit these from env.
SOURCE_DONE=
HOSTNAME_DONE=
KEYBOARD_DONE=
LOCALE_DONE=
TIMEZONE_DONE=
ROOTPASSWORD_DONE=
BOOTLOADER_DONE=
PARTITIONS_DONE=
NETWORK_DONE=
FILESYSTEMS_DONE=

TARGETDIR=/mnt/target
LOG=/dev/tty7
CONF_FILE=/tmp/.void-installer.conf
if [ ! -f $CONF_FILE ]; then
    touch -f $CONF_FILE
fi
ANSWER=$(mktemp -t vinstall-XXXXXXXX || exit 1)
TARGET_FSTAB=$(mktemp -t vinstall-fstab-XXXXXXXX || exit 1)

trap "DIE" INT TERM QUIT

# disable printk
if [ -w /proc/sys/kernel/printk ]; then
    echo 0 >/proc/sys/kernel/printk
fi

# Detect if this is an EFI system.
if [ -e /sys/firmware/efi/systab ]; then
    EFI_SYSTEM=1
fi

# dialog colors
BLACK="\Z0"
RED="\Z1"
GREEN="\Z2"
YELLOW="\Z3"
BLUE="\Z4"
MAGENTA="\Z5"
CYAN="\Z6"
WHITE="\Z7"
BOLD="\Zb"
REVERSE="\Zr"
UNDERLINE="\Zu"
RESET="\Zn"

# Properties shared per widget.
MENULABEL="${BOLD}Use UP and DOWN keys to navigate \
menus. Use TAB to switch between buttons and ENTER to select.${RESET}"
MENUSIZE="14 60 0"
INPUTSIZE="8 60"
MSGBOXSIZE="8 70"
YESNOSIZE="$INPUTSIZE"
WIDGET_SIZE="10 70"

# Hardcoded list of timezones; to not depend on tzdata.
TIMEZONES="
Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
Africa/Asmara
Africa/Bamako
Africa/Bangui
Africa/Banjul
Africa/Bissau
Africa/Blantyre
Africa/Brazzaville
Africa/Bujumbura
Africa/Cairo
Africa/Casablanca
Africa/Ceuta
Africa/Conakry
Africa/Dakar
Africa/Dar_es_Salaam
Africa/Djibouti
Africa/Douala
Africa/El_Aaiun
Africa/Freetown
Africa/Gaborone
Africa/Harare
Africa/Johannesburg
Africa/Juba
Africa/Kampala
Africa/Khartoum
Africa/Kigali
Africa/Kinshasa
Africa/Lagos
Africa/Libreville
Africa/Lome
Africa/Luanda
Africa/Lubumbashi
Africa/Lusaka
Africa/Malabo
Africa/Maputo
Africa/Maseru
Africa/Mbabane
Africa/Mogadishu
Africa/Monrovia
Africa/Nairobi
Africa/Ndjamena
Africa/Niamey
Africa/Nouakchott
Africa/Ouagadougou
Africa/Porto-Novo
Africa/Sao_Tome
Africa/Tripoli
Africa/Tunis
Africa/Windhoek
America/Adak
America/Anchorage
America/Anguilla
America/Antigua
America/Araguaina
America/Argentina/Buenos_Aires
America/Argentina/Catamarca
America/Argentina/Cordoba
America/Argentina/Jujuy
America/Argentina/La_Rioja
America/Argentina/Mendoza
America/Argentina/Rio_Gallegos
America/Argentina/Salta
America/Argentina/San_Juan
America/Argentina/San_Luis
America/Argentina/Tucuman
America/Argentina/Ushuaia
America/Aruba
America/Asuncion
America/Atikokan
America/Bahia
America/Bahia_Banderas
America/Barbados
America/Belem
America/Belize
America/Blanc-Sablon
America/Boa_Vista
America/Bogota
America/Boise
America/Cambridge_Bay
America/Campo_Grande
America/Cancun
America/Caracas
America/Cayenne
America/Cayman
America/Chicago
America/Chihuahua
America/Costa_Rica
America/Creston
America/Cuiaba
America/Curacao
America/Danmarkshavn
America/Dawson
America/Dawson_Creek
America/Denver
America/Detroit
America/Dominica
America/Edmonton
America/Eirunepe
America/El_Salvador
America/Fortaleza
America/Glace_Bay
America/Godthab
America/Goose_Bay
America/Grand_Turk
America/Grenada
America/Guadeloupe
America/Guatemala
America/Guayaquil
America/Guyana
America/Halifax
America/Havana
America/Hermosillo
America/Indiana/Indianapolis
America/Indiana/Knox
America/Indiana/Marengo
America/Indiana/Petersburg
America/Indiana/Tell_City
America/Indiana/Vevay
America/Indiana/Vincennes
America/Indiana/Winamac
America/Inuvik
America/Iqaluit
America/Jamaica
America/Juneau
America/Kentucky/Louisville
America/Kentucky/Monticello
America/Kralendijk
America/La_Paz
America/Lima
America/Los_Angeles
America/Lower_Princes
America/Maceio
America/Managua
America/Manaus
America/Marigot
America/Martinique
America/Matamoros
America/Mazatlan
America/Menominee
America/Merida
America/Metlakatla
America/Mexico_City
America/Miquelon
America/Moncton
America/Monterrey
America/Montevideo
America/Montreal
America/Montserrat
America/Nassau
America/New_York
America/Nipigon
America/Nome
America/Noronha
America/North_Dakota/Beulah
America/North_Dakota/Center
America/North_Dakota/New_Salem
America/Ojinaga
America/Panama
America/Pangnirtung
America/Paramaribo
America/Phoenix
America/Port-au-Prince
America/Port_of_Spain
America/Porto_Velho
America/Puerto_Rico
America/Rainy_River
America/Rankin_Inlet
America/Recife
America/Regina
America/Resolute
America/Rio_Branco
America/Santa_Isabel
America/Santarem
America/Santiago
America/Santo_Domingo
America/Sao_Paulo
America/Scoresbysund
America/Shiprock
America/Sitka
America/St_Barthelemy
America/St_Johns
America/St_Kitts
America/St_Lucia
America/St_Thomas
America/St_Vincent
America/Swift_Current
America/Tegucigalpa
America/Thule
America/Thunder_Bay
America/Tijuana
America/Toronto
America/Tortola
America/Vancouver
America/Whitehorse
America/Winnipeg
America/Yakutat
America/Yellowknife
Antarctica/Casey
Antarctica/Davis
Antarctica/DumontDUrville
Antarctica/Macquarie
Antarctica/Mawson
Antarctica/McMurdo
Antarctica/Palmer
Antarctica/Rothera
Antarctica/South_Pole
Antarctica/Syowa
Antarctica/Vostok
Arctic/Longyearbyen
Asia/Aden
Asia/Almaty
Asia/Amman
Asia/Anadyr
Asia/Aqtau
Asia/Aqtobe
Asia/Ashgabat
Asia/Baghdad
Asia/Bahrain
Asia/Baku
Asia/Bangkok
Asia/Beirut
Asia/Bishkek
Asia/Brunei
Asia/Choibalsan
Asia/Chongqing
Asia/Colombo
Asia/Damascus
Asia/Dhaka
Asia/Dili
Asia/Dubai
Asia/Dushanbe
Asia/Gaza
Asia/Harbin
Asia/Hebron
Asia/Ho_Chi_Minh
Asia/Hong_Kong
Asia/Hovd
Asia/Irkutsk
Asia/Jakarta
Asia/Jayapura
Asia/Jerusalem
Asia/Kabul
Asia/Kamchatka
Asia/Karachi
Asia/Kashgar
Asia/Kathmandu
Asia/Kolkata
Asia/Krasnoyarsk
Asia/Kuala_Lumpur
Asia/Kuching
Asia/Kuwait
Asia/Macau
Asia/Magadan
Asia/Makassar
Asia/Manila
Asia/Muscat
Asia/Nicosia
Asia/Novokuznetsk
Asia/Novosibirsk
Asia/Omsk
Asia/Oral
Asia/Phnom_Penh
Asia/Pontianak
Asia/Pyongyang
Asia/Qatar
Asia/Qyzylorda
Asia/Rangoon
Asia/Riyadh
Asia/Sakhalin
Asia/Samarkand
Asia/Seoul
Asia/Shanghai
Asia/Singapore
Asia/Taipei
Asia/Tashkent
Asia/Tbilisi
Asia/Tehran
Asia/Thimphu
Asia/Tokyo
Asia/Ulaanbaatar
Asia/Urumqi
Asia/Vientiane
Asia/Vladivostok
Asia/Yakutsk
Asia/Yekaterinburg
Asia/Yerevan
Atlantic/Azores
Atlantic/Bermuda
Atlantic/Canary
Atlantic/Cape_Verde
Atlantic/Faroe
Atlantic/Madeira
Atlantic/Reykjavik
Atlantic/South_Georgia
Atlantic/St_Helena
Atlantic/Stanley
Australia/Adelaide
Australia/Brisbane
Australia/Broken_Hill
Australia/Currie
Australia/Darwin
Australia/Eucla
Australia/Hobart
Australia/Lindeman
Australia/Lord_Howe
Australia/Melbourne
Australia/Perth
Australia/Sydney
Europe/Amsterdam
Europe/Andorra
Europe/Athens
Europe/Belgrade
Europe/Berlin
Europe/Bratislava
Europe/Brussels
Europe/Bucharest
Europe/Budapest
Europe/Chisinau
Europe/Copenhagen
Europe/Dublin
Europe/Gibraltar
Europe/Guernsey
Europe/Helsinki
Europe/Isle_of_Man
Europe/Istanbul
Europe/Jersey
Europe/Kaliningrad
Europe/Kiev
Europe/Lisbon
Europe/Ljubljana
Europe/London
Europe/Luxembourg
Europe/Madrid
Europe/Malta
Europe/Mariehamn
Europe/Minsk
Europe/Monaco
Europe/Moscow
Europe/Oslo
Europe/Paris
Europe/Podgorica
Europe/Prague
Europe/Riga
Europe/Rome
Europe/Samara
Europe/San_Marino
Europe/Sarajevo
Europe/Simferopol
Europe/Skopje
Europe/Sofia
Europe/Stockholm
Europe/Tallinn
Europe/Tirane
Europe/Uzhgorod
Europe/Vaduz
Europe/Vatican
Europe/Vienna
Europe/Vilnius
Europe/Volgograd
Europe/Warsaw
Europe/Zagreb
Europe/Zaporozhye
Europe/Zurich
Indian/Antananarivo
Indian/Chagos
Indian/Christmas
Indian/Cocos
Indian/Comoro
Indian/Kerguelen
Indian/Mahe
Indian/Maldives
Indian/Mauritius
Indian/Mayotte
Indian/Reunion
Pacific/Apia
Pacific/Auckland
Pacific/Chatham
Pacific/Chuuk
Pacific/Easter
Pacific/Efate
Pacific/Enderbury
Pacific/Fakaofo
Pacific/Fiji
Pacific/Funafuti
Pacific/Galapagos
Pacific/Gambier
Pacific/Guadalcanal
Pacific/Guam
Pacific/Honolulu
Pacific/Johnston
Pacific/Kiritimati
Pacific/Kosrae
Pacific/Kwajalein
Pacific/Majuro
Pacific/Marquesas
Pacific/Midway
Pacific/Nauru
Pacific/Niue
Pacific/Norfolk
Pacific/Noumea
Pacific/Pago_Pago
Pacific/Palau
Pacific/Pitcairn
Pacific/Pohnpei
Pacific/Port_Moresby
Pacific/Rarotonga
Pacific/Saipan
Pacific/Tahiti
Pacific/Tarawa
Pacific/Tongatapu
Pacific/Wake
Pacific/Wallis"

DIALOG() {
    rm -f $ANSWER
    dialog --colors --keep-tite --no-shadow --no-mouse \
        --backtitle "${BOLD}${WHITE}Void Linux installation -- http://www.voidlinux.eu/${RESET}" \
        --cancel-label "Back" --aspect 20 "$@" 2>$ANSWER
    return $?
}

DIE() {
    rval=$1
    [ -z "$rval" ] && rval=0
    clear
    rm -f $ANSWER $TARGET_FSTAB
    # reenable printk
    if [ -w /proc/sys/kernel/printk ]; then
        echo 4 >/proc/sys/kernel/printk
    fi
    umount_filesystems
    exit $rval
}

set_option() {
    if grep -Eq "^${1}.*" $CONF_FILE; then
        sed -i -e "/^${1}.*/d" $CONF_FILE
    fi
    echo "${1} ${2}" >>$CONF_FILE
}

get_option() {
    echo $(grep -E "^${1}.*" $CONF_FILE|sed -e "s|${1}||")
}

show_disks() {
    local dev size sectorsize gbytes

    # IDE
    for dev in $(ls /sys/block|grep -E '^hd'); do
        if [ "$(cat /sys/block/$dev/device/media)" = "disk" ]; then
            # Find out nr sectors and bytes per sector;
            echo "/dev/$dev"
            size=$(cat /sys/block/$dev/size)
            sectorsize=$(cat /sys/block/$dev/queue/hw_sector_size)
            gbytes="$(($size * $sectorsize / 1024 / 1024 / 1024))"
            echo "size:${gbytes}GB;sector_size:$sectorsize"
        fi
    done
    # SATA/SCSI and Virtual disks (virtio)
    for dev in $(ls /sys/block|grep -E '^[sv]d'); do
        if [ "$(cat /sys/block/$dev/device/type)" != "5" ]; then
            echo "/dev/$dev"
            size=$(cat /sys/block/$dev/size)
            sectorsize=$(cat /sys/block/$dev/queue/hw_sector_size)
            gbytes="$(($size * $sectorsize / 1024 / 1024 / 1024))"
            echo "size:${gbytes}GB;sector_size:$sectorsize"
        fi
    done
}

show_partitions() {
    local dev fstype fssize p part

    set -- $(show_disks)
    while [ $# -ne 0 ]; do
        disk=$(basename $1)
        shift 2
        # ATA/SCSI/SATA
        for p in /sys/block/$disk/$disk*; do
            if [ -d $p ]; then
                part=$(basename $p)
                fstype=$(blkid /dev/$part|awk '{print $3}'|sed -e 's/TYPE=\"\(.*\)\"/\1/g')
                [ "$fstype" = "iso9660" ] && continue
                fssize=$(lsblk -r /dev/$part|awk '{print $4}'|grep -v SIZE)
                echo "/dev/$part"
                echo "size:${fssize:-unknown};fstype:${fstype:-none}"
            fi
        done
        # LVM
        for p in $(ls /dev/mapper 2>/dev/null|grep -v control); do
            [ "$p" = "live-rw" ] && continue
            fstype=$(blkid /dev/$part|awk '{print $3}'|sed -e 's/TYPE=\"\(.*\)\"/\1/g')
            fssize=$(lsblk -r /dev/mapper/$p|awk '{print $4}'|grep -v SIZE)
            echo "/dev/mapper/$p"
            echo "size:${fssize:-unknown};fstype:${fstype:-none}"
        done
        # Software raid (md)
        for p in $(ls -d /dev/md* 2>/dev/null|grep '[0-9]'); do
            if cat /proc/mdstat|grep -qw $(echo $p|sed -e 's|/dev/||g'); then
                fstype=$(blkid /dev/$part|awk '{print $3}'|sed -e 's/TYPE=\"\(.*\)\"/\1/g')
                fssize=$(lsblk -r /dev/$p|awk '{print $4}'|grep -v SIZE)
                echo "$p"
                echo "size:${fssize:-unknown};fstype:${fstype:-none}"
            fi
        done
    done
}

menu_filesystems() {
    local dev fstype fssize mntpoint reformat

    while true; do
        DIALOG --title " Select the partition to edit " --menu "$MENULABEL" \
            ${MENUSIZE} $(show_partitions)
        [ $? -ne 0 ] && return

        dev=$(cat $ANSWER)
        DIALOG --title " Select the filesystem type for $dev " \
            --menu "$MENULABEL" ${MENUSIZE} \
            "vfat" "FAT32" \
            "btrfs" "Oracle's Btrfs" \
            "ext2" "Linux ext2 (no journaling)" \
            "ext3" "Linux ext3 (journal)" \
            "ext4" "Linux ext4 (journal)" \
            "swap" "Linux swap" \
            "xfs" "SGI's XFS"
        if [ $? -eq 0 ]; then
            fstype=$(cat $ANSWER)
        else
            continue
        fi
        if [ "$fstype" != "swap" ]; then
            DIALOG --inputbox "Please specify the mount point for $dev:" ${INPUTSIZE}
            if [ $? -eq 0 ]; then
                mntpoint=$(cat $ANSWER)
            elif [ $? -eq 1 ]; then
                continue
            fi
        else
            mntpoint=swap
        fi
        DIALOG --yesno "Do you want to create a new filesystem on $dev?" ${YESNOSIZE}
        if [ $? -eq 0 ]; then
            reformat=1
        elif [ $? -eq 1 ]; then
            reformat=0
        else
            continue
        fi
        fssize=$(lsblk -r $dev|awk '{print $4}'|grep -v SIZE)
        set -- "$fstype" "$fssize" "$mntpoint" "$reformat"
        if [ -n "$1" -a -n "$2" -a -n "$3" -a -n "$4" ]; then
            local bdev=$(basename $dev)
            if grep -Eq "^MOUNTPOINT \/dev\/${bdev}.*" $CONF_FILE; then
                sed -i -e "/^MOUNTPOINT \/dev\/${bdev}.*/d" $CONF_FILE
            fi
            echo "MOUNTPOINT $dev $1 $2 $3 $4" >>$CONF_FILE
        fi
    done
}

menu_partitions() {
    DIALOG --title " Select the disk to partition " \
        --menu "$MENULABEL" ${MENUSIZE} $(show_disks)
    if [ $? -eq 0 ]; then
        local device=$(cat $ANSWER)

        DIALOG --title "Modify Partition Table on $device" --msgbox "\n
${BOLD}GNU parted will be executed in disk $device.${RESET}\n\n
For BIOS systems, MBR or GPT partition tables are supported.\n
To use GPT on PC BIOS systems an empty partition of 1MB must be added\n
at the first 2GB of the disk with the TOGGLE \`bios_grub' enabled.\n
${BOLD}NOTE: you don't need this on EFI systems.${RESET}\n\n
For EFI systems GPT is mandatory and a FAT32 partition with at least\n
100MB must be created with the TOGGLE \`boot', this will be used as\n
EFI System Partition. This partition must have mountpoint as \`/boot/efi'.\n\n
At least 2 partitions are required: swap and rootfs (/).\n
For swap, RAM*2 must be really enough. For / 600MB are required.\n\n
${BOLD}WARNING: /usr is not supported as a separate partition.${RESET}\n
${BOLD}WARNING: changes made by parted are destructive, you've been warned.
${RESET}\n" 18 80
        if [ $? -eq 0 ]; then
            while true; do
                clear; parted $device; PARTITIONS_DONE=1; partprobe $device
                break
            done
        else
            return
        fi
    fi
}

menu_keymap() {
    local KEYMAPS="de German fr French it Italian en English es Spanish ru Russia us American"

    while true; do
        DIALOG --title " Select your keymap " --menu "$MENULABEL" 14 70 14 ${KEYMAPS}
        if [ $? -eq 0 ]; then
            set_option KEYMAP "$(cat $ANSWER)"
            loadkeys "$(cat $ANSWER)"
            KEYBOARD_DONE=1
            break
        else
            return
        fi
    done
}

set_keymap() {
    local KEYMAP=$(get_option KEYMAP)
    sed -i -e "s|KEYMAP=.*|KEYMAP=$KEYMAP|g" $TARGETDIR/etc/vconsole.conf
}

menu_locale() {
    local _locales="$(localectl --no-pager list-locales)"
    local _LOCALES=

    for f in ${_locales}; do
        _LOCALES="${_LOCALES} ${f} -"
    done
    while true; do
        DIALOG --title " Select your locale " --menu "$MENULABEL" 14 70 14 ${_LOCALES}
        if [ $? -eq 0 ]; then
            set_option LANG "$(cat $ANSWER)"
            LOCALE_DONE=1
            break
        else
            return
        fi
    done
}

set_locale() {
    local LOCALE=$(get_option LOCALE)
    sed -i -e "s|LANG=.*|LANG=$KEYMAP|g" $TARGETDIR/etc/locale.conf
}

menu_timezone() {
    local _tzones=

    for f in ${TIMEZONES}; do
        _tzones="${_tzones} ${f} -"
    done
    while true; do
        DIALOG --title " Select your timezone " --menu "$MENULABEL" 14 70 14 ${_tzones}
        if [ $? -eq 0 ]; then
            set_option TIMEZONE "$(cat $ANSWER)"
            TIMEZONE_DONE=1
            break
        else
            return
        fi
    done
}

set_timezone() {
    local TIMEZONE="$(get_option TIMEZONE)"
    ln -sf /usr/share/zoneinfo/${TIMEZONE} $TARGETDIR/etc/localtime
}

menu_hostname() {
    while true; do
        DIALOG --inputbox "Set the machine hostname:" ${INPUTSIZE}
        if [ $? -eq 0 ]; then
            set_option HOSTNAME "$(cat $ANSWER)"
            HOSTNAME_DONE=1
            break
        else
            return
        fi
    done
}

set_hostname() {
    echo $(get_option HOSTNAME) > $TARGETDIR/etc/hostname
}

menu_rootpassword() {
    local _firstpass= _secondpass= _desc=

    while true; do
        if [ -n "${_firstpass}" ]; then
            _desc="Enter the root password again (password won't be displayed)"
        else
            _desc="Enter the root password (password won't be displayed)"
        fi
        DIALOG --passwordbox "${_desc}" ${MSGBOXSIZE}
        if [ $? -eq 0 ]; then
            if [ -z "${_firstpass}" ]; then
                _firstpass="$(cat $ANSWER)"
            else
                _secondpass="$(cat $ANSWER)"
            fi
            if [ -n "${_firstpass}" -a -n "${_secondpass}" ]; then
                if [ "${_firstpass}" != "${_secondpass}" ]; then
                    DIALOG --infobox "Passwords do not match! please reenter it again" 6 80
                    unset _firstpass _secondpass
                    sleep 2 && continue
                fi
                set_option ROOTPASSWORD "${_firstpass}"
                ROOTPASSWORD_DONE=1
                break
            fi
        else
            return
        fi
    done
}

set_rootpassword() {
    echo "root:$(get_option ROOTPASSWORD)" | chpasswd -R $TARGETDIR -c SHA512
}

menu_bootloader() {
    while true; do
        DIALOG --title " Select the disk to install the bootloader" \
            --menu "$MENULABEL" ${MENUSIZE} $(show_disks)
        if [ $? -eq 0 ]; then
            set_option BOOTLOADER "$(cat $ANSWER)"
            BOOTLOADER_DONE=1
            break
        else
            return
        fi
    done
}

set_bootloader() {
    local dev=$(get_option BOOTLOADER) grub_args=

    # Check if it's an EFI system via efivars module.
    if [ -n "$EFI_SYSTEM" ]; then
        grub_args="--target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=void_grub --recheck"
    fi
    echo "Running grub-install $grub_args $dev..." >$LOG
    chroot $TARGETDIR grub-install $grub_args $dev >$LOG 2>&1
    if [ $? -ne 0 ]; then
        DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} \
        failed to install GRUB to $dev!\nCheck $LOG for errors." ${MSGBOXSIZE}
        DIE 1
    fi
    echo "Running grub-mkconfig on $TARGETDIR..." >$LOG
    chroot $TARGETDIR grub-mkconfig -o /boot/grub/grub.cfg >$LOG 2>&1
    if [ $? -ne 0 ]; then
        DIALOG --msgbox "${BOLD}${RED}ERROR${RESET}: \
        failed to run grub-mkconfig!\nCheck $LOG for errors." ${MSGBOXSIZE}
        DIE 1
    fi
}

test_network() {
    rm -f xtraeme.asc && \
        wget http://xbps.nopcode.org/live/xtraeme.asc >$LOG 2>&1
    if [ $? -eq 0 ]; then
        DIALOG --msgbox "Network is working properly!" ${MSGBOXSIZE}
        NETWORK_DONE=1
        return 1
    fi
    DIALOG --msgbox "Network is unaccessible, please setup it properly." ${MSGBOXSIZE}
}

configure_wifi() {
    local dev="$1"

    DIALOG --form "Wireless configuration for $dev:" 0 0 0 \
        "SSID:" 1 1 "add your AP name here" 1 21 20 0 \
        "Encryption:" 2 1 "Only supported: WEP or WPA-PSK" 2 21 20 0 \
        "Passphrase:" 3 1 "Enter the AP passphrase here" 3 21 20 0 || return 1
}

configure_eth() {
    local dev="$1"

    DIALOG --yesno "Do you want to use DHCP for $dev?" ${YESNOSIZE}
    if [ $? -eq 0 ]; then
        configure_net_dhcp $dev
    elif [ $? -eq 1 ]; then
        configure_net_static $dev
    fi
}

iface_setup() {
    ifconfig $1|grep -q 'inet addr:'
    return $?
}

configure_net_dhcp() {
    local dev="$1"

    iface_setup $dev
    if [ $? -eq 1 ]; then
        udhcpc -q -t 10 -n -i $dev 2>&1 | tee $LOG | \
            DIALOG --progressbox "Initializing $dev via DHCP..." ${WIDGET_SIZE}
        if [ $? -ne 0 ]; then
            DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} failed to run udhcpc. See $LOG for details." ${MSGBOXSIZE}
            return 1
        fi
        iface_setup $dev
        if [ $? -eq 1 ]; then
            DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} DHCP request failed for $dev. Check $LOG for errors." ${MSGBOXSIZE}
            return 1
        fi
    fi
    test_network
    if [ $? -eq 1 ]; then
        set_option NETWORK "${dev} dhcp"
    fi
}

configure_net_static() {
    local ip gw dns1 dns2 dev=$1

    DIALOG --form "Static IP configuration for $dev:" 0 0 0 \
        "IP address:" 1 1 "192.168.0.2" 1 21 20 0 \
        "Gateway:" 2 1 "192.168.0.1" 2 21 20 0 \
        "DNS Primary" 3 1 "8.8.8.8" 3 21 20 0 \
        "DNS Secondary" 4 1 "8.8.4.4" 4 21 20 0 || return 1

    set -- $(cat $ANSWER)
    ip=$1; gw=$2; dns1=$3; dns2=$4
    echo "running: ifconfig $dev $IPADDR up" >$LOG
    ifconfig $dev $ip up >$LOG 2>&1
    if [ $? -ne 0 ]; then
        DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} Failed to setup $dev interface." ${MSGBOXSIZE}
        return 1
    fi
    route add default gw $gw >$LOG 2>&1
    if [ $? -ne 0 ]; then
        DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} failed to setup your gateway." ${MSGBOXSIZE}
        return 1
    fi
    echo "nameserver $dns1" >/etc/resolv.conf
    echo "nameserver $dns2" >>/etc/resolv.conf
    test_network
    if [ $? -eq 1 ]; then
        set_option NETWORK "${dev} static $ip $gw $dns1 $dns2"
    fi
}

menu_network() {
    local dev addr f DEVICES

    for f in $(ls /sys/class/net); do
        [ "$f" = "lo" ] && continue
        addr=$(cat /sys/class/net/$f/address)
        DEVICES="$DEVICES $f $addr"
    done
    DIALOG --title " Select the network interface to configure " \
        --menu "$MENULABEL" ${MENUSIZE} ${DEVICES}
    if [ $? -eq 0 ]; then
        dev=$(cat $ANSWER)
        if $(echo $dev|grep -q "wlan[0-9]" 2>/dev/null); then
            configure_wifi $dev
        else
            configure_eth $dev
        fi
    fi
}

validate_filesystems() {
    local mnts dev size fstype mntpt mkfs rootfound swapfound fmt
    local usrfound efi_system_partition

    unset TARGETFS
    mnts=$(grep -E '^MOUNTPOINT.*' $CONF_FILE)
    set -- ${mnts}
    while [ $# -ne 0 ]; do
        dev=$2; fstype=$3; size=$4; mntpt="$5"; mkfs=$6
        shift 6

        if [ "$mntpt" = "/" ]; then
            rootfound=1
        elif [ "$mntpt" = "/usr" ]; then
            usrfound=1
        elif [ "$fstype" = "vfat" -a "$mntpt" = "/boot/efi" ]; then
            efi_system_partition=1
        fi
        if [ "$mkfs" -eq 1 ]; then
            fmt="NEW FILESYSTEM: "
        fi
        if [ -z "$TARGETFS" ]; then
            TARGETFS="${fmt}$dev ($size) mounted on $mntpt as ${fstype}\n"
        else
            TARGETFS="${TARGETFS}${fmt}${dev} ($size) mounted on $mntpt as ${fstype}\n"
        fi
    done
    if [ -z "$rootfound" ]; then
        DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} \
the mount point for the root filesystem (/) has not yet been configured." ${MSGBOXSIZE}
        return 1
    elif [ -n "$usrfound" ]; then
        DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} \
/usr mount point has been configured but is not supported, please remove it to continue." ${MSGBOXSIZE}
        return 1
    elif [ -n "$EFI_SYSTEM" -a -z "$efi_system_partition" ]; then
        DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} \
The EFI System Partition has not yet been configured, please create it\n
as FAT32, mountpoint /boot/efi and at least with 100MB of size." ${MSGBOXSIZE}
    fi
    FILESYSTEMS_DONE=1
}

create_filesystems() {
    local mnts dev mntpt fstype mkfs size rv uuid

    mnts=$(grep -E '^MOUNTPOINT.*' $CONF_FILE)
    set -- ${mnts}
    while [ $# -ne 0 ]; do
        dev=$2; fstype=$3; mntpt="$5"; mkfs=$6
        shift 6

        # swap partitions
        if [ "$fstype" = "swap" ]; then
            swapoff $dev >/dev/null 2>&1
            if [ "$mkfs" -eq 1 ]; then
                mkswap $dev >$LOG 2>&1
                if [ $? -ne 0 ]; then
                    DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} \
failed to create swap on ${dev}!\ncheck $LOG for errors." ${MSGBOXSIZE}
                    DIE 1
                fi
            fi
            swapon $dev >$LOG 2>&1
            if [ $? -ne 0 ]; then
                DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} \
failed to activate swap on $dev!\ncheck $LOG for errors." ${MSGBOXSIZE}
                DIE 1
            fi
            # Add entry for target fstab
            uuid=$(blkid $dev|awk '{print $2}'|sed -e 's/UUID=\"\(.*\)\"/\1/g')
            echo "UUID=$uuid none swap sw 0 0" >>$TARGET_FSTAB
            continue
        fi

        if [ "$mkfs" -eq 1 ]; then
            case "$fstype" in
            vfat) MKFS="mkfs.vfat -F32"; modprobe vfat >$LOG 2>&1;;
            xfs) MKFS="mkfs.xfs -f"; modprobe xfs >$LOG 2>&1;;
            ext2) MKFS="mke2fs"; modprobe ext2 >$LOG 2>&1;;
            ext3) MKFS="mke2fs -j"; modprobe ext3 >$LOG 2>&1;;
            ext4) MKFS="mke2fs -t ext4"; modprobe ext4 >$LOG 2>&1;;
            btrfs) MKFS="mkfs.btrfs"; modprobe btrfs >$LOG 2>&1;;
            esac
            DIALOG --infobox "Creating filesystem $fstype on $dev for $mntpt ..." 8 60
            echo "Running $MKFS $dev..." >$LOG
            $MKFS $dev >$LOG 2>&1; rv=$?
            if [ $rv -ne 0 ]; then
                DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} \
failed to create filesystem $fstype on $dev!\ncheck $LOG for errors." ${MSGBOXSIZE}
                DIE 1
            fi
        fi
        # Mount rootfs the first one.
        [ "$mntpt" != "/" ] && continue
        mkdir -p $TARGETDIR
        echo "Mounting $dev on $mntpt ($fstype)..." >$LOG
        mount -t $fstype $dev $TARGETDIR >$LOG 2>&1
        if [ $? -ne 0 ]; then
            DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} \
failed to mount $dev on ${mntpt}! check $LOG for errors." ${MSGBOXSIZE}
            DIE 1
        fi
        # Add entry to target fstab
        uuid=$(blkid $dev|awk '{print $2}'|sed -e 's/UUID=\"\(.*\)\"/\1/g')
        echo "UUID=$uuid $mntpt $fstype defaults 0 1" >>$TARGET_FSTAB
    done

    # mount all filesystems in target rootfs
    mnts=$(grep -E '^MOUNTPOINT.*' $CONF_FILE)
    set -- ${mnts}
    while [ $# -ne 0 ]; do
        dev=$2; fstype=$3; mntpt="$5"
        shift 6
        [ "$mntpt" = "/" -o "$fstype" = "swap" ] && continue
        mkdir -p ${TARGETDIR}${mntpt}
        echo "Mounting $dev on $mntpt ($fstype)..." >$LOG
        mount -t $fstype $dev ${TARGETDIR}${mntpt} >$LOG 2>&1
        if [ $? -ne 0 ]; then
            DIALOG --msgbox "${BOLD}${RED}ERROR:${RESET} \
failed to mount $dev on $mntpt! check $LOG for errors." ${MSGBOXSIZE}
            DIE
        fi
        # Add entry to target fstab
        uuid=$(blkid $dev|awk '{print $2}'|sed -e 's/UUID=\"\(.*\)\"/\1/g')
        echo "UUID=$uuid $mntpt $fstype defaults 0 1" >>$TARGET_FSTAB
    done
}

mount_filesystems() {
    for f in sys proc dev; do
        [ ! -d $TARGETDIR/$f ] && mkdir $TARGETDIR/$f
        echo "Mounting $TARGETDIR/$f..." >$LOG
        mount --bind /$f $TARGETDIR/$f >$LOG 2>&1
    done
}

umount_filesystems() {
    local f

    for f in sys proc dev; do
        echo "Unmounting $TARGETDIR/$f..." >$LOG
        umount $TARGETDIR/$f >$LOG 2>&1
    done
    local mnts=$(grep -E '^MOUNTPOINT.*$' $CONF_FILE)
    set -- ${mnts}
    while [ $# -ne 0 ]; do
        local dev=$2; local fstype=$3; local mntpt=$5
        shift 6
        if [ "$fstype" = "swap" ]; then
            echo "Disabling swap space on $dev..." >$LOG
            swapoff $dev >$LOG 2>&1
            continue
        fi
        if [ "$mntpt" != "/" ]; then
            echo "Unmounting $TARGETDIR/$mntpt..." >$LOG
            umount $TARGETDIR/$mntpt >$LOG 2>&1
        fi
    done
    echo "Unmounting $TARGETDIR..." >$LOG
    umount $TARGETDIR >$LOG 2>&1
}

install_packages() {
    local _grub=

    if [ -n "$EFI_SYSTEM" ]; then
        _grub="grub-x86_64-efi"
    else
        _grub="grub"
    fi

    mkdir -p $TARGETDIR/boot/grub
    stdbuf -oL xbps-install -C /tmp/xbps.conf \
        -r $TARGETDIR -Sy base-system ${_grub} 2>&1 | \
        DIALOG --title "Installing base system packages..." \
        --programbox 24 80
    if [ $? -ne 0 ]; then
        DIE 1
    fi
}

menu_install() {
    # Don't continue if filesystems are not ready.
    validate_filesystems || return 1

    ROOTPASSWORD_DONE="$(get_option ROOTPASSWORD)"
    BOOTLOADER_DONE="$(get_option BOOTLOADER)"

    if [ -z "$FILESYSTEMS_DONE" ]; then
        DIALOG --msgbox "${BOLD}Required filesystems were not configured, \
please do so before starting the installation.${RESET}" ${MSGBOXSIZE}
        return 1
    elif [ -z "$ROOTPASSWORD_DONE" ]; then
        DIALOG --msgbox "${BOLD}The root password has not been configured, \
please do so before starting the installation.${RESET}" ${MSGBOXSIZE}
        return 1
    elif [ -z "$BOOTLOADER_DONE" ]; then
        DIALOG --msgbox "${BOLD}The disk to install the bootloader has not been \
configured, please do so before starting the installation.${RESET}" ${MSGBOXSIZE}
        return 1
    fi

    DIALOG --yesno "${BOLD}The following operations will be executed:${RESET}\n\n
${BOLD}${TARGETFS}${RESET}\n
${BOLD}${RED}WARNING: data on partitions will be COMPLETELY DESTROYED for new \
filesystems.${RESET}\n\n
${BOLD}Do you want to continue?${RESET}" 20 80 || return
    unset TARGETFS

    # Create and mount filesystems
    create_filesystems

    # mount required fs
    mount_filesystems

    # If source not set use defaults.
    if [ -z "$SOURCE_DONE" ]; then
        enable_localsrc
    fi
    # Install required packages.
    install_packages

    DIALOG --infobox "Applying installer settings..." 4 60

    # copy target fstab.
    install -Dm644 $TARGET_FSTAB $TARGETDIR/etc/fstab

    # set up keymap, locale, timezone, hostname and root passwd.
    set_keymap
    set_locale
    set_timezone
    set_hostname
    set_rootpassword

    # Copy /etc/skel files for root.
    cp $TARGETDIR/etc/skel/.[bix]* $TARGETDIR/root

    # network settings for target
    if [ -n "$NETWORK_DONE" ]; then
        local net=$(grep -E '^NETWORK.*' $CONF_FILE)
        set -- ${net}
        local dev=$2; local type=$3; local ip=$4; local gw=$5
        local dns1=$6; local dns2=$7
        if [ "$type" = "dhcp" ]; then
            # if user had dhcp enabled, enable dhcpcd service for that device.
            chroot $TARGETDIR systemctl enable dhcpcd.service >$LOG 2>&1
        else
            # static IP through dhcpcd.
            mv $TARGETDIR/etc/dhcpcd.conf $TARGETDIR/etc/dhdpcd.conf.orig
            echo "# Static IP configuration set by the void-installer for $dev." \
                >$TARGETDIR/etc/dhcpcd.conf
            echo "interface $dev" >>$TARGETDIR/etc/dhcpcd.conf
            echo "static ip_address=$ip" >>$TARGETDIR/etc/dhcpcd.conf
            echo "static routers=$gw" >>$TARGETDIR/etc/dhcpcd.conf
            echo "static domain_name_servers=$dns1 $dns2" >>$TARGETDIR/etc/dhcpcd.conf
            chroot $TARGETDIR systemctl enable dhcpcd.service >$LOG 2>&1
        fi
    fi

    # install bootloader.
    set_bootloader
    sync && sync && sync

    # unmount all filesystems.
    umount_filesystems

    # installed successfully.
    DIALOG --yesno "${BOLD}Void Linux has been installed successfully!${RESET}\n
Do you want to reboot the system?" ${YESNOSIZE}
    if [ $? -eq 0 ]; then
        shutdown -r now
    else
        return
    fi
}

enable_localsrc() {
    # local and fallback to official remote.
    echo "repositories = { /packages, http://xbps.nopcode.org/repos/current }" >/tmp/xbps.conf
}

enable_netsrc() {
    # only remote.
    echo "repositories = { http://xbps.nopcode.org/repos/current }" > /tmp/xbps.conf
}

menu_source() {
    local src=

    DIALOG --title " Select installation source " \
        --menu "$MENULABEL" 8 70 0 \
        "Local" "Packages from ISO image" \
        "Network" "Packages from official remote reposity"
    case "$(cat $ANSWER)" in
        "Local") src="local"; enable_localsrc;;
        "Network") src="net"; enable_netsrc; menu_network;;
        *) return 1;;
    esac
    SOURCE_DONE=1
    set_option SOURCE $src
}

menu() {
    if [ -z "$DEFITEM" ]; then
        DEFITEM="Keyboard"
    fi

    DIALOG --default-item $DEFITEM \
        --extra-button --extra-label "Settings" \
        --title " Void Linux installation menu " \
        --menu "$MENULABEL" 10 70 0 \
        "Keyboard" "Set system keyboard" \
        "Source" "Set source installation" \
        "Hostname" "Set system hostname" \
        "Locale" "Set system locale" \
        "Timezone" "Set system time zone" \
        "RootPassword" "Set system root password" \
        "BootLoader" "Set disk to install bootloader" \
        "Partition" "Partition disk(s)" \
        "Filesystems" "Configure filesystems and mount points" \
        "Install" "Start installation with saved settings" \
         "Exit" "Exit installation"

    if [ $? -eq 3 ]; then
        # Show settings
        DIALOG --title "Saved settings for installation" --textbox $CONF_FILE 14 60
        return
    fi

    case $(cat $ANSWER) in
        "Keyboard") menu_keymap && [ -n "$KEYBOARD_DONE" ] && DEFITEM="Source";;
        "Source") menu_source && [ -n "$SOURCE_DONE" ] && DEFITEM="Hostname";;
        "Hostname") menu_hostname && [ -n "$HOSTNAME_DONE" ] && DEFITEM="Locale";;
        "Locale") menu_locale && [ -n "$LOCALE_DONE" ] && DEFITEM="Timezone";;
        "Timezone") menu_timezone && [ -n "$TIMEZONE_DONE" ] && DEFITEM="RootPassword";;
        "RootPassword") menu_rootpassword && [ -n "$ROOTPASSWORD_DONE" ] && DEFITEM="BootLoader";;
        "BootLoader") menu_bootloader && [ -n "$BOOTLOADER_DONE" ] && DEFITEM="Partition";;
        "Partition") menu_partitions && [ -n "$PARTITIONS_DONE" ] && DEFITEM="Filesystems";;
        "Filesystems") menu_filesystems && [ -n "$FILESYSTEMS_DONE" ] && DEFITEM="Install";;
        "Install") menu_install;;
        "Exit") DIE;;
        *) DIALOG --yesno "Abort Installation?" ${YESNOSIZE} && DIE
    esac
}

#
# main()
#
DIALOG --title "${BOLD}${RED} Enter the void ... ${RESET}" --msgbox "\n
Welcome to the Void Linux installation. A simple and minimal \
Linux distribution made from scratch and built from the source package tree \
available for XBPS, a new alternative binary package system.\n\n
The installation should be pretty straightforward, if you are in trouble \
please join us at ${BOLD}#xbps on irc.freenode.org${RESET}.\n\n
${BOLD}http://www.voidlinux.eu${RESET}\n\n" 16 80

while true; do
    menu
done

exit 0
# vim: set ts=4 sw=4 et: