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#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.

set -x

send_back_to_the_future() {
	# stop ntp
	service ntp stop || true
	# disable systemd date services (and don't fail if systemd ain't running)
	systemctl disable systemd-timesyncd || true
	systemctl disable systemd-timedated || true
	systemctl stop systemd-timesyncd || true
	systemctl stop systemd-timedated || true
	# set correct date
	ntpdate -b de.pool.ntp.org
	# set fake date
	date --set="+398 days +6 hours + 23 minutes"
	# finally report success
	echo "$(date -u) - system is running in the future now" | mail -s "$(hostname -f) in the future" root
}

put_schroots_on_tmpfs() {
	# keep schroot sessions on tmpfs
	[ -L /var/lib/schroot ] || echo "$(date -u) - /var/lib/schroot is not a link (to /srv/workspace/varlibschroot/) as it should, please fix manually"
	mkdir -p /srv/workspace/varlibschroot
	cd /srv/workspace/varlibschroot || exit 1
	mkdir -p mount session union unpack
	mkdir -p union/overlay union/underlay
}

fixup_shm() {
	# this is always harmless
	chmod 1777 /dev/shm
}

fixup_mtu() {
	# only act on systems which have eth0
	if ip link show eth0 >/dev/null 2>&1 ; then
		# if MTU != 1500 set it to 1500
		if [ -z "$(ip link show eth0 | grep 'eth0:' | grep 'mtu 1500 ' || true)" ] ; then
			ip link set dev eth0 mtu 1500
		fi
	fi
}

#
# init, notify about reboots
#
MESSAGE="$(hostname -f) rebooted"
echo "$(date -u) - system was rebooted" | mail -s "$MESSAGE" root

#
# notify jenkins reboots on irc
#
if [ "$(hostname)" = "jenkins" ] ; then
	for channel in debian-qa debian-reproducible ; do
		kgb-client --conf /srv/jenkins/kgb/$channel.conf --relay-msg "$MESSAGE"
	done
fi

#
# fixup /(dev|run)/shm if needed
#
fixup_shm

#
# fixup eth0's MTU if needed
fixup_mtu

#
# put schroots on tmpfs for non debian hosts
#
case $(hostname) in
	profitbricks-build3*)	put_schroots_on_tmpfs ;;
	profitbricks-build4*)	put_schroots_on_tmpfs ;;
	profitbricks-build7*)	put_schroots_on_tmpfs ;;
	*)			;;
esac

#
# run some hosts in the future
#
case $(hostname) in
	codethink-sled9*)	send_back_to_the_future ;;
	codethink-sled11*)	send_back_to_the_future ;;
	codethink-sled13*)	send_back_to_the_future ;;
	codethink-sled15*)	send_back_to_the_future ;;
	profitbricks-build4*)	send_back_to_the_future ;;
	profitbricks-build5*)	send_back_to_the_future ;;
	profitbricks-build6*)	send_back_to_the_future ;;
	profitbricks-build15*)	send_back_to_the_future ;;
	profitbricks-build16*)	send_back_to_the_future ;;
	*)			;;
esac

echo "$(date -u) - system booted up."
exit 0