install.sh

#!/usr/bin/env bash

PROG_NAME="$(basename $0)"
ARGS="$@"
VERSION="4.19-1.1.0"

function print_version() {
    printf "\tRe4son-Kernel Installer: $PROG_NAME $VERSION\n\n"
    exit 0
}

function print_help() {
    printf "\n\tUsage: ${PROG_NAME} [option]\n"
    printf "\t\t\t   (No option)\tInstall Re4son-Kernel and ask to install tools & Re4son Bluetooth support\n"
    printf "\t\t\t\t-h\tPrint this help\n"
    printf "\t\t\t\t-a\tInstall everything without asking\n"
    printf "\t\t\t\t-v\tPrint version of this installer\n"
    printf "\t\t\t\t-e\tOnly install Re4son-Kernel headers\n"
    printf "\t\t\t\t-b\tOnly install Re4son Bluetooth support for RPi 3 B(+) & RPi Zero W\n"
    printf "\t\t\t\t-t\tOnly install Kali-Pi tools\n"
    printf "\t\t\t\t-r\tOnly remove Re4son Bluetooth support\n"
    printf "\t\t\t\t-u\tUpdate Re4son-Kernel Installer\n\n"
    exit 1
}

function ask() {
    # http://djm.me/ask
    while true; do

        if [ "${2:-}" = "Y" ]; then
            prompt="Y/n"
            default=Y
        elif [ "${2:-}" = "N" ]; then
            prompt="y/N"
            default=N
        else
            prompt="y/n"
            default=
        fi

        # Ask the question
        printf "\t++++ "
        read -p "$1 [$prompt] " REPLY

        # Default?
        if [ -z "$REPLY" ]; then
            REPLY=$default
        fi

        # Check if the reply is valid
        case "$REPLY" in
            Y*|y*) return 0 ;;
            N*|n*) return 1 ;;
        esac
    done
}

function exitonerr {
    # via: http://stackoverflow.com/a/5196108
    "$@"
    local status=$?

    if [ $status -ne 0 ]; then
        echo "Error completing: $1" >&2
        exit 1
    fi

    return $status
}

function check_update() {
    TEMP_FILE="/tmp/install.sh"
    printf "\n\t*** Downloading update ***\n"
    wget -O ${TEMP_FILE} https://github.com/Re4son/re4son-kernel-builder/raw/build-4.14.n/install.sh
    cp $TEMP_FILE $PROG_NAME
    chmod +x $PROG_NAME
    rm -f $TEMP_FILE
    printf "\tReplaced old version:\tRe4son-Kernel Installer: ${PROG_NAME} ${VERSION}\n"
    printf "\tWith new version:"
    source "$PROG_NAME" -v
    exit 0
}

function install_bluetooth {
    printf "\n\t**** Installing bluetooth packages for Raspberry Pi 3 & Zero W ****\n"
    apt update
    apt install -y ./repo/pi-bluetooth_0.1.4+re4son_all.deb
    systemctl enable hciuart && systemctl enable bluetooth
    printf "\t**** Bluetooth services installed\n\n"
    return 0
}

function install_firmware {
	printf "\n\t**** Installing firmware for Raspberry Pi 3 B(+) & Zero W wifi & bluetooth chips ****\n"
    #Raspberry Pi 3 & Zero W
    if [ ! -f /lib/firmware/brcm/BCM43430A1.hcd ]; then
        cp firmware/BCM43430A1.hcd /lib/firmware/brcm/BCM43430A1.hcd
    fi
    if [ ! -f  /etc/udev/rules.d/99-com.rules ]; then
      cp firmware/99-com.rules /etc/udev/rules.d/99-com.rules
    fi

    return 0
}

function install_kernel(){
    printf "\n\t**** Installing custom Re4son kernel with kali wifi injection patch and TFT support ****\n"
    if grep -q boot /proc/mounts; then
        printf "\n\t**** /boot is mounted ****\n"
    else
        if ask "Cannot find /boot. Maybe it is not mounted. Shall I try mounting it?" "Y"; then
            printf "\n\t**** Mounting /boot ****\n"
	    mount /dev/mmcblk0p1 /boot
        fi
        if grep -q boot /proc/mounts; then
            printf "\n\t**** /boot is mounted ****\n"
        else
            printf "\n\t#### /boot must be mounted. If you think it's not, quit here and try: ####\n"
            printf "\t#### sudo mount /dev/mmcblk0p1 /boot                                  ####\n\n"
            if ask "Continue?" "N"; then
                printf "\n\t*** Proceeding... ****\n\n"
            else
                printf "\n\t#### Aborting... ####\n\n"
                exit 1
	    fi
        fi
    fi

    ## Install device-tree-compiler
    printf "\n\t**** Installing device tree overlays for various screens ****\n"
    PKG_STATUS=$(dpkg-query -W --showformat='${Status}\n' device-tree-compiler|grep "ok installed")
    printf "\t**** Checking for device-tree-compiler: ${PKG_STATUS} ****\n"
    if [ "" == "$PKG_STATUS" ]; then
        printf "\tNo device-tree-compiler. Installing it now.\n"
        apt update
        apt install device-tree-compiler
    fi
    ## Reserved
    ## cp src dest

    ##
    ## Fix for spelling error in postrm script of package raspberrypi-re4son-firmware
    ## so we can replace it ith the new package kalipi-re4son-firmware
    if [ -f /var/lib/dpkg/info/raspberrypi-re4son-firmware.postrm ]; then
        sed -i 's/for files in/for file in/g' "/var/lib/dpkg/info/raspberrypi-re4son-firmware.postrm"
    fi
    printf "\n\t**** Device tree overlays installed                      ****\n"
    ## raspberrypi-re4son-firmware had a spelling mistake in postrm which we have to fix
    ## prior to upgrading it
    if [ -f /var/lib/dpkg/info/raspberrypi-re4son-firmware.postrm ]; then
	sed -i 's/for files in/for file in/g' "/var/lib/dpkg/info/raspberrypi-re4son-firmware.postrm"
    fi
    exitonerr apt install -y --allow-downgrades -o Dpkg::Options::="--force-architecture" ./kalipi-bootloader_*
    exitonerr apt install -y --allow-downgrades -o Dpkg::Options::="--force-architecture" ./kalipi-kernel_*
    exitonerr apt install -y --allow-downgrades -o Dpkg::Options::="--force-architecture" ./libraspberrypi0_*
    exitonerr apt install -y --allow-downgrades -o Dpkg::Options::="--force-architecture" ./libraspberrypi-dev_*
    exitonerr apt install -y --allow-downgrades -o Dpkg::Options::="--force-architecture" ./libraspberrypi-doc_*
    exitonerr apt install -y --allow-downgrades -o Dpkg::Options::="--force-architecture" ./libraspberrypi-bin_*
    exitonerr apt install -y --allow-downgrades -o Dpkg::Options::="--force-architecture" ./kalipi-re4son-firmware_*
    ## Nexmon is not yet working with this kernel so we don't have a firmware package. R-enable when nexmon is available:
    ##exitonerr apt install -y --allow-downgrades -o Dpkg::Options::="--force-architecture" ./kalipi-re4son-firmware_*

    ARCH=`dpkg --print-architecture`
    ## Kernel8.img is build as kernel8-alt so that the bootloader on armhf systems wont pick it over kernel7.img
    ## To use this kernel, just load it via config.txt (kernel=kernel8-alt.img) or rename it
    ## Let's check if a kernel8.img has been created previously
    if [ -f /boot/kernel8.img ]; then
	## On arm64 installations, we'll copy kernel8-alt.img across to kernel8.img as FAT doesn't support links
	if [ "$ARCH" == "arm64" ]; then
            cp -f /boot/kernel8-alt.img /boot/kernel8.img
	else
            ## On armhf and armel we'll avoid problems by getting rid of it but we'll ask the usera in case they have other plans
	    if ask "A 64bit kernel image called kernel8.img is found on your system but can cause problems on $ARCH platforms. Shall I delete it?" "Y"; then
	        rm -f /boot/kernel8.img
	    else
	        ## OK - let's update it then
	        cp -f /boot/kernel8-alt.img /boot/kernel8.img
	    fi
        fi	    
    fi
    ## Install nexmon firmware
    printf "\n\t**** Installing nexutil ****\n"
    # Install nexutil
    if [ -f ./nexmon/${ARCH}/nexutil ]; then
        cp -f ./nexmon/${ARCH}/nexutil /usr/bin/
    fi
    printf "\n\t**** Nexutil installed ****\n"
    
    printf "\n\t**** Fixing unmet dependencies in Kali Linux ****\n"
    mkdir -p /etc/kbd
    touch /etc/kbd/config
    printf "\t**** Unmet dependencies in Kali Linux fixed ****\n\n"
    printf "\t**** Installation completed ****\n"
    printf "\t**** Documentation and help can be found in Sticky Finger's Kali-Pi forums at ****\n"
    printf "\t**** https://whitedome.com.au/forums ****\n\n"

    return 0
}

function remove_bluetooth {
    printf "\n"
    if ask "Remove Re4son-Kernel Bluetooth support?"; then
        printf "\n\t**** Stopping bluetooth Services ****\n"

        systemctl stop bluetooth
        systemctl stop hciuart

        printf "\t**** Removing bluetooth packages for Raspberry Pi 3 & Zero W ****\n"
        apt purge -y pi-bluetooth bluez bluez-firmware
        printf "\t**** Bluetooth packages for Raspberry Pi 3 & Zero W removed ****\n\n"

        if ask "Reboot to apply changes?"; then
            reboot
        fi
    fi
    printf "\n"
    return 0
}

function install_headers() {

    printf "\n\t**** Installing Re4son-Kernel headers ****\n"
    apt install -y -o Dpkg::Options::="--force-architecture" ./kalipi-kernel-headers_*
    printf "\t**** Installation completed ****\n\n"
    return 0
}

function install_tools() {
    printf "\n\t**** Installing Kali-Pi tools ****\n"
    if [ -f /usr/bin/kalipi-config ]; then
        VER=`tools/kalipi-config --version`
        VER1=${VER##* }
        VER=`/usr/bin/kalipi-config --version`
        VER2=${VER##* }
        if [ $VER1 \> $VER2 ]; then 
            cp -f tools/kalipi-config /usr/bin 
            chmod 755 /usr/bin/kalipi-config
        fi
    else
        cp -f tools/kalipi-config /usr/bin
        chmod 755 /usr/bin/kalipi-config
    fi
    if [ ! -f /usr/bin/kalipi-tft-config ]; then
        cp -f tools/kalipi-tft-config /usr/bin 
        chmod 755 /usr/bin/kalipi-tft-config
    fi
    if [ -f /usr/bin/kalipi-tft-config ]; then
        VER=`tools/kalipi-tft-config -v`
        VER1=${VER##* }
        VER=`/usr/bin/kalipi-tft-config -v`
        VER2=${VER##* }
        if [ $VER1 \> $VER2 ]; then 
            cp -f tools/kalipi-tft-config /usr/bin 
            chmod 755 /usr/bin/kalipi-tft-config
        fi
    else
        cp -f tools/kalipi-tft-config /usr/bin
        chmod 755 /usr/bin/kalipi-tft-config
    fi
    printf "\t**** Installation completed ****\n\n"
    return 0
}


############
##        ##
##  MAIN  ##

if [[ $EUID -ne 0 ]]; then
   printf "\n\t${PROG_NAME} must be run as root. try: sudo install.sh\n\n"
   exit 1
fi

args=$(getopt -uo 'ahevbrtpu' -- $*)

set -- $args

for i
do
    case "$i"
    in
        -h)
            print_help
            exit 0
            ;;
        -v)
            print_version
            exit 0
            ;;
	-a)
	    install_kernel
	    install_firmware
            install_headers
	    install_tools
	    exit 0
	    ;;
        -e)
            install_headers
            exit 0
            ;;
        -b)
            install_firmware
            install_bluetooth
            if ask "Reboot to apply changes?" "Y"; then
                reboot
            fi
            exit 0
            ;;
        -r)
            remove_bluetooth
            exit 0
            ;;
        -t)
            install_tools
            exit 0
            ;;
        -u)
            check_update
            exit 0
            ;;
    esac
done

printf "\n"
if ask "Install Re4son-Kernel?" "Y"; then
    install_kernel
    install_firmware
fi
##if ask "Install support for RasPi 3 & Zero W built-in wifi & bluetooth adapters?" "Y"; then
##    install_bluetooth
##fi
if ask "Install kernel headers?" "Y"; then
    install_headers
fi
if ask "Install kali-pi tools (kalipi-config, kalipi-tft-config)?" "Y"; then
    install_tools
fi 
if ask "Reboot to apply changes?" "Y"; then
    reboot
fi
printf "\n"