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From: jimp@cognos.uucp (Jim Patterson)
Newsgroups: comp.os.vms
Subject: Re: redirection of stdio, et al.
Message-ID: <642@cognos.UUCP>
Date: Fri, 1-May-87 18:10:19 EDT
Article-I.D.: cognos.642
Posted: Fri May  1 18:10:19 1987
Date-Received: Sat, 2-May-87 14:23:48 EDT
References: <8704272220.AA01440@ucbvax.Berkeley.EDU>
Reply-To: jimp@cognos.UUCP (Jim Patterson)
Distribution: world
Organization: Cognos Incorporated, Ottawa, Canada
Lines: 31

In article <8704272220.AA01440@ucbvax.Berkeley.EDU> 
gwalker@SPCA.BBN.COM.UUCP writes:

>The following are the ways I know of to get stdio
>redirection on VMS. 
>1. For all programs that use SYS$OUTPUT (stdout for VMS) for their output (as
>   most do) you can either
>    a) use
>    ASSIGN/USER somefile SYS$OUTPUT
>On the input side (SYS$INPUT), method (a) can be used:
>  ASSIGN/USER myinfile SYS$INPUT

For VAX 11 C users, ASSIGN/USER doesn't work.  You can use ASSIGN
(which assigns a supervisor-level logical), but of course you have
to remember to DEASSIGN it after. As near as I can figure out, this
is because the VAX 11 C I/O interface doesn't actually open the
standard input/output files but instead relies on the process-permanent
file opens.

You can also do your own I/O redirection as noted in some of the other
articles. No, VAX 11 C won't do this for you (or at least
it won't for me).

There is a product called VAX Shell that I think does all of this
redirection etc. for you.  I haven't used it, though, so have no
idea how it works or what it does for you.  From what I know of it,
VAX Shell gives you a UNIX-like shell environment to replace the
VMS DCL environment.
-- 
Jim Patterson
Cognos Inc.