#DEBHELPER#
user="$(sed -n '/^[a-z]/{p;q;}' /etc/userv/dyndns-service-users)"
-if id $user >/dev/null 2>&1; then exit 0; fi
-adduser --system --group --gecos 'userv dyndns' \
- --home /etc/userv
+if [ "$user" ]; then
+ adduser --system --quiet --group --gecos 'userv dyndns' \
+ --home /etc/userv --no-create-home --shell /bin/false $user
+fi