Questions about OPEN

[Robert (LISPer 68K)Heller <heller%umass-cs.csnet@csnet-relay.arpa>]

	I have some questions about what the function OPEN returns if
:DIRECTION is :PROBE:

	1) if the file exists, does OPEN return a closed stream?
	2) if the file does not exist and :IF-DOES-NOT-EXIST is
	   :CREATE, what does OPEN do?  create an empty and return a
	   closed stream?

	I realize that the second case is somewhat pathological, but
I want to implement something reasonable for OPEN.  The manual
(published edition) is not very clear about just what OPEN does with
a :DIRECTION of :PROBE.  It just says that OPEN does not really open
the file, just tests for its existence.

				Robert Heller
				Heller%UMass-CS@CSNet-Relay