chromiarchos-restore

#!/bin/bash
#
# License: MIT, see the LICENSE file
# Copyright © 2011, Guillaume Brunerie <guillaume.brunerie@[ens.fr|gmail.com]>

HOSTNAME=Archbook
UPSTART_FILE=chromiarchos.conf

mustberoot()
{
    echo "You must be root to run this script."
    exit 1
}

abort()
{
    echo $1
    exit 2
}

if [[ $# != 0 ]]
then
    echo "Usage: $0"
    echo
    echo "Restore an existing installation of Chromiarch OS after an automatic"
    echo "Chrome OS update."
    exit 3
fi

[[ $UID == 0 ]] || mustberoot


# Determine if / is read-only or already read-write
if [[ $(rootdev) != $(rootdev -s) ]]
then
    echo "Phase 1 of 2"
    echo "* Disabling rootfs verification"
    ROOTDEV_PARTITION=$(rootdev -s | grep -o "[35]")
    KERNEL_PARTITION=$(( ROOTDEV_PARTITION - 1 ))
    case $KERNEL_PARTITION in
	2 | 4);;
	*) abort "Unable to determine current kernel partition (rootdev -s = $(rootdev -s))";;
    esac
    
    /usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification --partitions $KERNEL_PARTITION

    echo "Phase 1 of 2 completed, please reboot and run $0 again to complete the restoring."
else
    if [[ ! -e /etc/init/$UPSTART_FILE ]]
    then
        echo "Phase 2 of 2"
        echo "* Installing new upstart job for Arch"
        cp /usr/local/share/$UPSTART_FILE /etc/init
        echo "* Modifying hostname"
        if [[  $(grep -c "^hostname localhost$" /sbin/chromeos_startup) == 1 \
            && $(grep -c "^127.0.0.1	localhost$" /etc/hosts) == 1 \
            && $(grep -c "^::1		localhost$" /etc/hosts) == 1 ]]
        then
            sed -i "s/^hostname localhost$/hostname $HOSTNAME/" /sbin/chromeos_startup
            sed -i "s/^127.0.0.1	localhost$/127.0.0.1	localhost	$HOSTNAME/" /etc/hosts
            sed -i "s/^::1		localhost$/::1		localhost	$HOSTNAME/" /etc/hosts
        else
            echo "Hostname configuration failed"
        fi
        echo "Phase 2 of 2 completed, please reboot to start Chromiarch OS."
    else
        echo "Chromiarch OS should already be working on this Chromebook."
    fi
fi