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chronos.sh
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chronos.sh
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# 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" = "x86_64" ]
then
echo -e "This version of Chrome OS isn't 64-bit. We'll use an unofficial Chromium OS kernel to get around this...\n"
else
echo -e "and you're running a 64-bit version of Chrome OS! That's just dandy!\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
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 ""
read -p "Press [Enter] to install ChrUbuntu 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}
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 ${target_disk}
reboot
exit
fi
fi
if [ ! -d /mnt/stateful_partition/ubuntu ]
then
mkdir /mnt/stateful_partition/ubuntu
fi
cd /mnt/stateful_partition/ubuntu
# try mounting a USB / SD Card if it's there...
if [ ! -d /tmp/usb_files ]
then
mkdir /tmp/usb_files
fi
mount /dev/sdb /tmp/usb_files > /dev/null 2>&1
mount /dev/sdb1 /tmp/usb_files > /dev/null 2>&1
# Copy /tmp/usb_files/ubuntu (.sha1 and foo.6 files) to SSD if they're there
if [ -d /tmp/usb_files/ubuntu ]
then
cp -rf /tmp/usb_files/ubuntu/* /mnt/stateful_partition/ubuntu/
fi
if [[ "${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: ${target_rootfs}"
# Download and copy ubuntu root filesystem, keep track of successful parts so we can resume
SEEK=0
FILESIZE=102400
for one in a b
do
for two in a b c d e f g h i j k l m n o p q r s t u v w x y z
do
# last file is smaller than the rest...
if [ "$one$two" = "bz" ]
then
FILESIZE=20480
fi
FILENAME="ubuntu-1204.bin$one$two.bz2"
correct_sha1_is_valid=0
while [ $correct_sha1_is_valid -ne 1 ]
do
if [ ! -f /mnt/stateful_partition/ubuntu/$FILENAME.sha1 ]
then
curl -L http://cr-48-ubuntu.googlecode.com/files/$FILENAME.sha1
fi
correct_sha1=`cat $FILENAME.sha1 | awk '{print $1}'`
correct_sha1_length="${#correct_sha1}"
if [ "$correct_sha1_length" -eq "40" ]
then
correct_sha1_is_valid=1
else
rm $FILENAME.sha1
fi
done
current_sha1=`dd if=${target_rootfs} bs=1024 skip=$SEEK count=$FILESIZE status=noxfer | sha1sum | awk '{print $1}'`
if [ "$correct_sha1" = "$current_sha1" ]
then
echo "$correct_sha1 equals $current_sha1 already written correctly..."
SEEK=$(( $SEEK + $FILESIZE ))
continue
else
echo -e "$FILENAME needs to be written because it's $current_sha1 not $correct_sha1"
fi
if [ -f /tmp/usb_files/$FILENAME ]
then
echo -e "Found $FILENAME on flash drive. Using it..."
get_cmd="cat /tmp/usb_files/$FILENAME"
else
echo -e "\n\nDownloading $FILENAME\n\n"
get_cmd="curl -L -O - http://cr-48-ubuntu.googlecode.com/files/$FILENAME"
fi
write_is_valid=0
while [ $write_is_valid -ne 1 ]
do
$get_cmd | bunzip2 -c | dd bs=1024 seek=$SEEK of=${target_rootfs} status=noxfer > /dev/null 2>&1
current_sha1=`dd if=${target_rootfs} bs=1024 skip=$SEEK count=$FILESIZE status=noxfer | sha1sum | awk '{print $1}'`
if [ "$correct_sha1" = "$current_sha1" ]
then
echo -e "\n$FILENAME was written to ${target_rootfs} correctly...\n\n"
write_is_valid=1
else
echo -e "\nError writing downloaded file $FILENAME. shouldbe: $correct_sha1 is:$current_sha1. Retrying...\n\n"
fi
done
SEEK=$(( $SEEK + $FILESIZE ))
done
done
#Mount Ubuntu rootfs and copy cgpt + modules over
echo "Copying modules, firmware and binaries to ${target_rootfs} for ChrUbuntu"
if [ ! -d /tmp/urfs ]
then
mkdir /tmp/urfs
fi
mount -t ext4 ${target_rootfs} /tmp/urfs
cp /usr/bin/cgpt /tmp/urfs/usr/bin/
chmod a+rx /tmp/urfs/usr/bin/cgpt
echo "console=tty1 debug verbose root=${target_rootfs} rootwait rw lsm.module_locking=0" > kernel-config
if [ "$chromebook_arch" = "x86_64" ] # We'll use the official Chrome OS kernel if it's x64
then
cp -ar /lib/modules/* /tmp/urfs/lib/modules/
vbutil_kernel --pack newkern \
--keyblock /usr/share/vboot/devkeys/kernel.keyblock \
--version 1 \
--signprivate /usr/share/vboot/devkeys/kernel_data_key.vbprivk \
--config kernel-config \
--vmlinuz /boot/vmlinuz-`uname -r`
use_kernfs=newkern
else # Otherwise we'll download a custom-built non-official Chromium OS kernel
model="mario" # set a default
if [[ $hwid =~ .*MARIO.* ]]
then
model="mario"
else
if [[ $hwid =~ .*ALEX.* ]]
then
model="alex"
else
if [[ $hwid =~ .*ZGB.* ]]
then
model="zgb"
fi
fi
fi
curl -L http://cr-48-ubuntu.googlecode.com/files/$model-x64-modules.tar.bz2
curl -L http://cr-48-ubuntu.googlecode.com/files/$model-x64-kernel-partition.bz2
bunzip2 $model-x64-kernel-partition.bz2
use_kernfs="$model-x64-kernel-partition"
vbutil_kernel --repack $use_kernfs \
--keyblock /usr/share/vboot/devkeys/kernel.keyblock \
--version 1 \
--signprivate /usr/share/vboot/devkeys/kernel_data_key.vbprivk \
--config kernel-config
tar xjvvf $model-x64-modules.tar.bz2 --directory /tmp/urfs/lib/modules
fi
umount /tmp/urfs
dd if=$use_kernfs of=${target_kern}
# Resize sda7 in order to "grow" filesystem to user's selected size
e2fsck -f ${target_rootfs}
resize2fs -p ${target_rootfs}
#Set Ubuntu partition as top priority for next boot
cgpt add -i 6 -P 5 -T 1 ${target_disk}
# reboot
reboot