#!/bin/sh

set -e

# /etc/default/hwclock is supported as of util-linux version 2.20.1-5
_UTIL_LINUX_VERSION="$(dpkg -l util-linux | awk '/^ii/ { print $3 }')"

if dpkg --compare-versions "${_UTIL_LINUX_VERSION}" lt 2.20.1-5~
then
	exit 0
fi

if [ -e /etc/default/hwclock ]
then
	. /etc/default/hwclock

	# HWCLOCKACCESS is commented in /etc/default/hwclock
	if [ -z "${HWCLOCKACCESS}" ]
	then
		# uncommenting it
		sed -e "s|^# *HWCLOCKACCESS=|HWCLOCKACCESS=|" \
			/etc/default/hwclock > /etc/default/hwclock.tmp
	else
		cp /etc/default/hwclock /etc/default/hwclock.tmp
	fi
else
	touch /etc/default/hwclock.tmp
fi

# Set the hwclock parameters
grep -Eq '^ *HWCLOCKACCESS=' /etc/default/hwclock.tmp || \
	echo "HWCLOCKACCESS=" >> /etc/default/hwclock.tmp

sed -i -e "s|^ *HWCLOCKACCESS=.*|HWCLOCKACCESS=\"${_HWCLOCKACCESS}\"|" \
	/etc/default/hwclock.tmp

mv /etc/default/hwclock.tmp /etc/default/hwclock