- error codes are returned as negative Exxx. i.e. return -EINVAL. There
are some exceptions: for constructors its is OK to return NULL on
- OOM. For lookup functions NULL is fine too for "not found".
+ OOM. For lookup functions NULL is fine too for "not found"
+
+- Do not issue NSS requests (that includes user name and host name
+ lookups) from the main daemon as this might trigger deadlocks when
+ we those lookups involve synchronously talking to services that we
+ would need to start up
+
+- Do not access any directories outside of /etc, /dev, /lib from the
+ init daemon to avoid deadlocks with the automounter
+
+- Don't synchronously talk to any other service, due to risk of
+ deadlocks