Register Scwm with the session manager, and return the client id. The return value is either an id string, or #f if the session manager could not be initialized - SM-error-message can be used to get more information in this case. If Scwm is already registered, this function just returns the client id.
Module: Built-in Primitive
Defined in src/session-manager.c at line 487 (CVS log)