PROBE-FILE

[Rob MacLachlan <RAM@CMU-CS-C.ARPA>]

    The issue of how to get back more information about what is wrong
with a file was where we got bogged down before.  I think that error
systems are the called for when you start to consider that sort of
issue.  Any enumeration of all the things that can go wrong with
writing a file will also probably be hopelessly implementation
dependent.  Unless you can come up with a simple, highly esthetic
proposal, I think we should stick with NIL for failure.

    I suppose we could return an error-message string as a second
value, but anything along those lines seems like a sort of half-way
measure to me.

  Rob