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Re: revert to previous version?

From: Greg A. Woods
Subject: Re: revert to previous version?
Date: Wed, 5 Sep 2001 20:32:35 -0400 (EDT)

[ On Wednesday, September 5, 2001 at 14:52:08 (-0700), Mike Castle wrote: ]
> Subject: Re: revert to previous version?
> On Wed, Sep 05, 2001 at 04:35:21PM -0400, Greg A. Woods wrote:
> > I don't know of any system that can support command-line CVS which does
> > not support I/O redirection on the command-line....
> Didn't I see, somewhere, that there was MVS support for CVS?

Hmmm...  MVS -- but then it wouldn't really be "command line", now would
it!  ;-)

VM/CMS does have I/O redirection though...  (I doubt the syntax is the
same, but any VM/CMS user half-way familiar with unix-ish tools would
probably automatically do the translation in their heads.)

> Does VMS support redirection?

I'm pretty sure it does.  In the DEC line of thins I/O redirection
comes, IIRC, from RT-11 (if not from some earlier OS), and I'm sure VMS
will have any and every RT-11 user-interface feature....

(dmr says that the I/O redirection in Unix was inspired by the same kind
of feature in Multics (which is pretty much where I learned it first
too), but I don't believe Multics invented the concept and dmr also says
the feature was listed in the 1969 Multic manual as "author-
maintained".  In Multics the user-interface was almost infinitely more
baroque, requiring a separate command invocation for each change in
where the output was attached.  It seems Ken thompson can be credited
with inventing the syntax first seen in the Bourne Shell.)

                                                        Greg A. Woods

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