prepare-vbox-appliance

#!/bin/bash

# Check if it has root permissions.
if [ `id -u` -ne 0 ]; then
  echo "The script must be run as root in the recovery console!"
  exit 1
fi

if [ -z "`grep '\sext4 ro[\s,]' /proc/mounts`" ]; then
  # Recovery console:
  # Zero out free space to achive higher compression rate for vbox image.
  mount -o ro,remount /
  zerofree -v /dev/sda1
  poweroff
else
  # Boot with edited command line:
  # Use old fashioned commands in case if we entered with init=/bin/bash.
  zerofree -v /dev/sda1
  echo 1 > /proc/sys/kernel/sysrq
  echo o > /proc/sysrq-trigger
fi

exit 0