+cancel() { echo "$1" >&2; exit 0; };
+test ! -r /etc/default/dropbear || . /etc/default/dropbear
+test "$NO_START" = "0" || cancel 'NO_START is not set to zero.'
+test -x "$DAEMON" || cancel "$DAEMON does not exist or is not executable."
+test ! -h /var/service/dropbear || \
+ cancel '/var/service/dropbear exists, service is controlled through runit.'