#!/bin/sh -e

if ! ischroot; then
	# Do not honour re-exec when requested from within a
	# chroot since:
	#
	# (a) The version of Upstart outside might not support it.
	# (b) An isolated environment such as a chroot should
	#     not be able to modify its containing environment.
	#
	# A sufficiently new Upstart will actually handle a re-exec
	# request coming from telinit within a chroot correctly,
	# but it's simple enough to perform the check here and save
	# Upstart the effort.

	# Query running version of Upstart, but only when we know
	# that initctl will work.
	#
	# The calculated version string may be the null string if
	# Upstart is not running (where for example an alternative
	# init is running outside a chroot environment) or if the
	# query failed for some reason. However, the version check
	# below handles a null version string correctly.
	UPSTART_VERSION_RUNNING=$(initctl version 2>/dev/null |\
		awk '{print $3}'|tr -d ')' || :)
	
	if dpkg --compare-versions "$UPSTART_VERSION_RUNNING" ge 1.9 || [ "$UPSTART_VERSION_RUNNING" = 1.8-ubuntu-full-serialization ]; then
		# We are not running inside a chroot and the running version
		# of Upstart supports lossless stateful re-exec, so we can
		# restart immediately.
		#
		# XXX: Note that the check on the running version must
		# remain *indefinitely* since it's the only safe way to
		# know if stateful re-exec is supported: simply checking
		# packaged version numbers is not sufficient since
		# the package could be upgraded multiple times without a
		# reboot.
		telinit u || :
	elif [ "$UPSTART_JOB" = "cloud-config" ]; then
		# If upgraded by cloud-init, do not perform partial
		# stateful re-exec, as cloud-init instance will fail
		# to initialise.
		touch /var/run/init.upgraded || :
		[ -x /usr/share/update-notifier/notify-reboot-required ] && \
		    /usr/share/update-notifier/notify-reboot-required || true

	elif dpkg --compare-versions "$UPSTART_VERSION_RUNNING" ge 1.6.1; then
		# Otherwise, perform partial stateful re-exec and
		# request a reboot.
		telinit u || :
		[ -x /usr/share/update-notifier/notify-reboot-required ] && \
		    /usr/share/update-notifier/notify-reboot-required || true			    
	else
		# Before we shutdown or reboot, we need to re-exec so that we
		# can safely remount the root filesystem; we can't just do that
		# here because we lose state.
		touch /var/run/init.upgraded || :
	fi
fi

# update grub on first install, so that the alternative init system boot
# entries get updated
if [ "$1" = configure ] && [ -z "$2" ] && [ -e /boot/grub/grub.cfg ] && which update-grub >/dev/null 2>&1; then
    update-grub || true
fi

# Automatically added by dh_installdeb
dpkg-maintscript-helper rm_conffile /etc/init/upstart-dbus-bridge.conf 1.9.1-0ubuntu4 -- "$@"
# End automatically added section