| 
	    plP_getinitdriverlist
	  ( | text_buffer ); | 
 Get the initialized-driver list. Function returns a
    space-delimited list of the currently initialized drivers or streams. If more
    than one stream is using the same driver, then its name will be returned
    more than once. The function can be analogously thought of as also
    returning the names of the active streams.  Invoked internally by
    plP_checkdriverinit. 
text_buffer
	  (char *, output)
	Pointer to a user-allocated buffer to hold the result. The user must ensure the buffer is big enough to hold the result.