post_install() {
	post_upgrade

	echo "==> Generating KVMD certificate ..."
	kvmd-gencert
}

post_upgrade() {
	echo "==> Configuring KVMD users and groups ..."

	_create_user kvmd "Pi-KVM - The main daemon"
	_add_user_to_group kvmd gpio
	_add_user_to_group kvmd uucp
	_add_user_to_group kvmd systemd-journal

	_create_user kvmd-ipmi "Pi-KVM - IPMI to KVMD proxy"
	_add_user_to_group kvmd-ipmi kvmd

	_create_user kvmd-nginx "Pi-KVM - HTTP entrypoint"
	_add_user_to_group kvmd-nginx kvmd

	chown kvmd:kvmd /etc/kvmd/htpasswd
	chown kvmd-ipmi:kvmd-ipmi /etc/kvmd/ipmipasswd
	chmod 600 /etc/kvmd/*passwd
}

post_remove() {
	_delete_user kvmd-nginx
	_delete_user kvmd-ipmi
	_delete_user kvmd
}

_create_user() {
	id "$1" &>/dev/null || useradd -r -c "$2" -s /sbin/nologin "$1"
}

_delete_user() {
	userdel "$1" &>/dev/null
}

_add_user_to_group() {
	(groupmems -l -g "$2" | grep "$1" >/dev/null) || groupmems -g "$2" -a "$1"
}