livecd-rootfs/live-build/ubuntu-touch/hooks/03-etc-writable.chroot

#!/bin/sh
set -e
set -x

mkdir -p /etc/writable

for f in adjtime timezone localtime; do
    if [ -e /etc/$f ]; then
        echo "I: Moving /etc/$f to /etc/writable/"
        mv /etc/$f /etc/writable/$f
    fi
    echo "I: Linking /etc/$f to /etc/writable/"
    ln -s /etc/writable/$f /etc/$f
done