post_install()
{
	if [ ! -h /etc/systemd/system/display-manager.service ]; then
		systemctl enable lightdm.service
	fi
	getent group lightdm > /dev/null 2>&1 || groupadd -g 620 lightdm
	getent passwd lightdm > /dev/null 2>&1 || useradd -c 'LightDM Display Manager' -u 620 -g lightdm -d /var/run/lightdm -s /sbin/nologin lightdm
	passwd -l lightdm > /dev/null
	chmod +r /etc/lightdm/lightdm.conf
}

post_upgrade()
{
	post_install
	systemctl daemon-reload >/dev/null 2>&1
}

pre_remove()
{
	systemctl --no-reload disable lightdm.service >/dev/null 2>&1
}

post_remove()
{
	getent passwd lightdm > /dev/null 2>&1 && userdel lightdm
	getent group lightdm > /dev/null 2>&1 && groupdel lightdm
	systemctl daemon-reload >/dev/null 2>&1
}

op=$1
shift

$op $*

# vim: ft=sh