post_install() {
	getent group ntp &>/dev/null || groupadd -g 87 ntp >/dev/null
	getent passwd ntp &>/dev/null || useradd -u 87 -g ntp -d /var/lib/ntp -c 'Network Time Protocol' -s /bin/false ntp >/dev/null
	true
	
	echo "Enabling systemd service"
         systemctl enable ntpd.service
}

post_upgrade() {
	if [[ $(vercmp $2 4.2.6.p4-4) -le 0 ]]; then
		post_install
	fi
	if [[ $(vercmp $2 4.2.6.p5-5) -le 0 ]]; then
		chown -R ntp /var/lib/ntp
	fi
	
	echo "Enabling systemd service"
         systemctl enable ntpd.service
}

pre_remove() {
   echo "Disabling systemd service"
         systemctl disable ntpd.service
}

post_remove() {
	getent passwd ntp &>/dev/null && userdel ntp >/dev/null
	getent group ntp &>/dev/null && groupdel ntp >/dev/null
	true
}