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From: roy@gitpyr.UUCP (Roy J. Mongiovi)
Newsgroups: net.micro.pc
Subject: Re: More on the EXEC function call
Message-ID: <132@gitpyr.UUCP>
Date: Fri, 15-Feb-85 10:21:43 EST
Article-I.D.: gitpyr.132
Posted: Fri Feb 15 10:21:43 1985
Date-Received: Sun, 17-Feb-85 04:34:15 EST
References: <243@shell.UUCP>
Organization: Georgia Institute of Technology, Atlanta, GA
Lines: 18

> Could someone please tell me how I can inform DOS apriori that I
> wish all standard output (or input) to be redirected? Is IOCTL the
> way to go? If so, how is it done?

To redirect stdin, you close handle 0 (which is standard input),
and then open the file you want to be stdin.  That file is allocated
the first free file handle (in this case 0 since we just freed it),
and voila! stdin is redirected.  Likewise for stdout and handle 1.

Then you load and exec your program.  To get stdin/stdout back to
the console, you can dup handle 2 (stderr) unless you have changed
it also (in which case you can open "con:").
-- 
Roy J. Mongiovi.	Office of Computing Services.		User Services.
Georgia Institute of Technology.	Atlanta GA  30332.	(404) 894-6163
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