install-xubuntu-arm-chromebook.sh

#!/bin/bash
# Based on Chrubuntu 34v87 script

BASE_IMAGE_FILE="http://cdimage.ubuntu.com/ubuntu-core/daily/current/raring-core-armhf.tar.gz"

# fw_type will always be developer for Mario.
# Alex and ZGB need the developer BIOS installed though.
fw_type="`crossystem mainfw_type`"
if [ ! "$fw_type" = "developer" ]
  then
    echo -e "\nYou're Chromebook is not running a developer BIOS!"
    echo -e "You need to run:"
    echo -e ""
    echo -e "sudo chromeos-firmwareupdate --mode=todev"
    echo -e ""
    echo -e "and then re-run this script."
    return
  else
    echo -e "\nOh good. You're running a developer BIOS...\n"
fi

# hwid lets us know if this is a Mario (Cr-48), Alex (Samsung Series 5), ZGB (Acer), etc
hwid="`crossystem hwid`"

echo -e "Chome OS model is: $hwid\n"

chromebook_arch="`uname -m`"
if [ ! "$chromebook_arch" = "armv7l" ]
then
  echo -e "This version of Ubuntu is for the ARM-based Chromebooks only\n"
else
  echo -e "and you're running on a ARM-based Chromebook, awesome!\n"
fi

read -p "Press [Enter] to continue..."

powerd_status="`initctl status powerd`"
if [ ! "$powerd_status" = "powerd stop/waiting" ]
then
  echo -e "Stopping powerd to keep display from timing out..."
  initctl stop powerd
fi

powerm_status="`initctl status powerm`"
if [ ! "$powerm_status" = "powerm stop/waiting" ]
then
  echo -e "Stopping powerm to keep display from timing out..."
  initctl stop powerm
fi

setterm -blank 0

# Figure out what the target disk is

if [ "$1" != "" ]; then
  target_disk=$1
  echo "Got ${target_disk} as target drive"
  echo ""
  echo "WARNING! All data on this device will be wiped out! Continue at your own risk!"
  echo ""
  if [ "$target_disk" = "/dev/mmcblk0" ]; then
    echo 'Cowardly refusing to install to /dev/mmcblk0 in this mode; run with no args instead'
    echo 'to properly partition your disk!'
    exit 1
  fi

  read -p "Press [Enter] to install Ubuntu on ${target_disk} or CTRL+C to quit"

  ext_size="`blockdev --getsz ${target_disk}`"
  aroot_size=$((ext_size - 65600 - 33))
  parted --script ${target_disk} "mktable gpt"
  cgpt create ${target_disk}
  # always use 6 and 7 for sanity
  cgpt add -i 6 -b 64 -s 32768 -S 1 -P 5 -l KERN-A -t "kernel" ${target_disk}
  cgpt add -i 7 -b 65600 -s $aroot_size -l ROOT-A -t "rootfs" ${target_disk}
  sync
  blockdev --rereadpt ${target_disk}
  partprobe ${target_disk}
  crossystem dev_boot_usb=1
else
  target_disk="`rootdev -d -s`"
  # Do partitioning (if we haven't already)
  ckern_size="`cgpt show -i 6 -n -s -q ${target_disk}`"
  croot_size="`cgpt show -i 7 -n -s -q ${target_disk}`"
  state_size="`cgpt show -i 1 -n -s -q ${target_disk}`"

  max_ubuntu_size=$(($state_size/1024/1024/2))
  rec_ubuntu_size=$(($max_ubuntu_size - 1))
  # If KERN-C and ROOT-C are one, we partition, otherwise assume they're what they need to be...
  if [ "$ckern_size" =  "1" -o "$croot_size" = "1" ]
  then
    while :
    do
      read -p "Enter the size in gigabytes you want to reserve for Ubuntu. Acceptable range is 5 to $max_ubuntu_size  but $rec_ubuntu_size is the recommended maximum: " ubuntu_size
      if [ ! $ubuntu_size -ne 0 2>/dev/null ]
      then
        echo -e "\n\nNumbers only please...\n\n"
        continue
      fi
      if [ $ubuntu_size -lt 5 -o $ubuntu_size -gt $max_ubuntu_size ]
      then
        echo -e "\n\nThat number is out of range. Enter a number 5 through $max_ubuntu_size\n\n"
        continue
      fi
      break
    done
    # We've got our size in GB for ROOT-C so do the math...

    #calculate sector size for rootc
    rootc_size=$(($ubuntu_size*1024*1024*2))

    #kernc is always 16mb
    kernc_size=32768

    #new stateful size with rootc and kernc subtracted from original
    stateful_size=$(($state_size - $rootc_size - $kernc_size))

    #start stateful at the same spot it currently starts at
    stateful_start="`cgpt show -i 1 -n -b -q ${target_disk}`"

    #start kernc at stateful start plus stateful size
    kernc_start=$(($stateful_start + $stateful_size))

    #start rootc at kernc start plus kernc size
    rootc_start=$(($kernc_start + $kernc_size))

    #Do the real work
    
    echo -e "\n\nModifying partition table to make room for Ubuntu." 
    echo -e "Your Chromebook will reboot, wipe your data and then"
    echo -e "you should re-run this script..."
    umount /mnt/stateful_partition
    
    # stateful first
    cgpt add -i 1 -b $stateful_start -s $stateful_size -l STATE ${target_disk}

    # now kernc
    cgpt add -i 6 -b $kernc_start -s $kernc_size -l KERN-C ${target_disk}

    # finally rootc
    cgpt add -i 7 -b $rootc_start -s $rootc_size -l ROOT-C ${target_disk}

    reboot
    exit
  fi
fi

if [[ "${target_disk}" =~ "mmcblk" ]]
then
  target_rootfs="${target_disk}p7"
  target_kern="${target_disk}p6"
else
  target_rootfs="${target_disk}7"
  target_kern="${target_disk}6"
fi

echo "Target Kernel Partition: $target_kern  Target Root FS: ${target_rootfs}"

# try mounting a USB / SD Card if it's there...
if [ ! -d /tmp/usb_files ]; then
  mkdir /tmp/usb_files
fi
mount /dev/sda /tmp/usb_files > /dev/null 2>&1
mount /dev/sda1 /tmp/usb_files > /dev/null 2>&1

if [ -z "$IMAGE_FILE" ]; then
  IMAGE_FILE="$BASE_IMAGE_FILE"
fi

if [[ "${IMAGE_FILE}" =~ "http" ]]; then
  base_image_file="`basename \"${IMAGE_FILE}\"`"
  if [ -f "/tmp/usb_files/$base_image_file" ]; then
    echo "Using /tmp/usb_files/$base_image_file instead of downloading"
    untar_file="/tmp/usb_files/$base_image_file"
  else
    echo "Downloading $IMAGE_FILE..."
    untar_file="/mnt/stateful_partition/$base_image_file"
    wget -c -O "/mnt/stateful_partition/$base_image_file" "$IMAGE_FILE"
    if [ $? -ne 0 ] ; then
      echo "Download failed!"
      exit 1
    fi
  fi
else
  if [ -f "/tmp/usb_files/$IMAGE_FILE" ]; then
    untar_file="/tmp/usb_files/$IMAGE_FILE"
    echo "Using ${untar_file}"
  elif [ -f "$IMAGE_FILE" ]; then
    untar_file="$IMAGE_FILE"
    echo "Using ${untar_file}"
  else
    echo "File '${IMAGE_FILE}' not found, either on USB device or as absolute path!"
    exit 1
  fi
fi

# our mount target
if [ ! -d /tmp/ubuntu ]; then
  mkdir /tmp/ubuntu
fi

echo "Creating filesystem on ${target_rootfs}..."
mkfs.ext4 -j ${target_rootfs} && mount ${target_rootfs} /tmp/ubuntu
if [ $? -ne 0 ] ; then
  echo 'Failed to create and/or mount filesystem!'
  exit 1
fi

if [[ "$untar_file" =~ "tgz" || "$untar_file" =~ ".gz" ]] ; then
  tar xvzCf /tmp/ubuntu "$untar_file"
elif [[ "$untar_file" =~ "bz2" ]] ; then
  tar xvjCf /tmp/ubuntu "$untar_file"
elif [[ "$untar_file" =~ "xz" ]] ; then
  tar xvJCf /tmp/ubuntu "$untar_file"
else
  echo "Hmm... not sure how to untar your file"
  exit 1
fi

# Let's get some firmware in place
cp -r /lib/firmware/* /tmp/ubuntu/lib/firmware/
cp -r /lib/modules/* /tmp/ubuntu/lib/modules/
cp -r /usr/share/alsa/ucm/* /tmp/ubuntu/usr/share/alsa/ucm/

# Create the setup script in /tmp/setup-script on the ubuntu partition
cat > /tmp/ubuntu/tmp/setup-script <<EOF
# fix up /etc/shadow so root can log in
passwd -d root

echo "nameserver 8.8.8.8" > /etc/resolv.conf

# update-initramfs will need this
mount -t devpts devpts /dev/pts
mount -t proc proc /proc

echo "deb http://ports.ubuntu.com/ubuntu-ports/ raring universe" >> /etc/apt/sources.list
echo "deb http://ppa.launchpad.net/chromebook-arm/ppa/ubuntu raring main" > /etc/apt/sources.list.d/chromebook-arm.list
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys ABBBBD6B
apt-get update
apt-get -y install ubuntu-minimal
apt-get -y install ubuntu-standard
apt-get -y install language-pack-en-base wpasupplicant
apt-get -y install cgpt chromebook-s3-default-settings vboot-utils
apt-get -y install linux-tools-3.4.0-5
# we need this because update-initrd will still run, even though
# it doesn't need to and the image package doesn't have an initrd
touch /boot/initrd.img-3.4.0-5-chromebook
# --no-install-recommends is there because the image incorrectly
# recommends flash-kernel, which we don't want
apt-get -y install --no-install-recommends linux-image-chromebook
apt-get -y install xserver-xorg-video-fbdev
apt-get install xubuntu-desktop
apt-get purge plymouth

# clean up
umount /dev/pts
umount /proc

if [ ! -d /etc/X11/xorg.conf.d ] ; then mkdir /etc/X11/xorg.conf.d ; fi
if [ ! -f /etc/X11/xorg.conf.d/exynos5.conf ] ; then

cat > /etc/X11/xorg.conf.d/exynos5.conf <<EOZ
Section "Device"
        Identifier      "Mali FBDEV"
        Driver          "fbdev"
        Option          "fbdev"                 "/dev/fb0"
        Option          "Fimg2DExa"             "false"
        Option          "DRI2"                  "true"
        Option          "DRI2_PAGE_FLIP"        "false"
        Option          "DRI2_WAIT_VSYNC"       "true"
#       Option          "Fimg2DExaSolid"        "false"
#       Option          "Fimg2DExaCopy"         "false"
#       Option          "Fimg2DExaComposite"    "false"
        Option          "SWcursorLCD"           "false"
EndSection

Section "Screen"
        Identifier      "DefaultScreen"
        Device          "Mali FBDEV"
        DefaultDepth    24
EndSection
 
Section "InputClass"
        Identifier "touchpad"
        MatchIsTouchpad "on"
        Option "FingerHigh" "5"
        Option "FingerLow" "5"
EndSection
 
Section "InputClass"
        Identifier "touchpad catchall"
        Driver "synaptics"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Option "TapButton1" "1"
        Option "TapButton2" "2"
        Option "TapButton3" "3"
EndSection

EOZ
fi
EOF

# run the setup script
chroot /tmp/ubuntu bash /tmp/setup-script

# now set up the kernel
echo "console=tty1 printk.time=1 nosplash rootwait root=${target_rootfs} rw rootfstype=ext4" > /tmp/ubuntu/boot/cmdline
vbutil_kernel --pack /tmp/ubuntu/boot/chronos-kernel-image --keyblock /usr/share/vboot/devkeys/kernel.keyblock --signprivate /usr/share/vboot/devkeys/kernel_data_key.vbprivk --config /tmp/ubuntu/boot/cmdline --vmlinuz /tmp/ubuntu/boot/vmlinuz-3.4.0-5-chromebook --version 1 --arch arm
dd if=/tmp/ubuntu/boot/chronos-kernel-image of=${target_kern} bs=512

# Unmount ubuntu
umount /tmp/ubuntu

# finally make it bootable, but just once (-S 0: flagged as not successful, -T 1: one try)
cgpt add -S 1 -T 1 -P 12 -i 6 ${target_disk}

echo -e "\n*****************\n"
echo "Done -- reboot to enter Ubuntu."
echo "In Ubuntu, the root password is blank -- please change it and create a user"
echo ""
echo "To connect to a wireless network, type:"
echo "sh quickwpa.sh myssid mypasskey"
#echo "To set Ubuntu to boot again, use 'cgpt add -S 0 -T 1 -P 12 -i 6 ${target_disk}'"