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Message-Id: <199312090136.AA00252@cerberus.bhpese.oz.au>
To:	rc@hawkwind.utcs.toronto.edu
Subject: Re: Translating question 
In-Reply-To: Your message of "Wed, 08 Dec 93 19:20:16 EST."
             <9312081920.aa20477@ceres.srg.af.mil> 
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Date:	Wed, 8 Dec 1993 20:36:38 -0500
From:	Scott Merrilees <Sm@cerberus.bhpese.oz.au>


>The following fragment was easy to prototype in rc:
>
>	prog1 |[3] prog2	# output of fd 3 is piped to stdin
>
>but trying to convert it to Bourne shell is making me nuts!  I want
>stdout and stderr to go to "the usual place" with just "special stuff"
>being piped into the second program.  Could someone give me a clue
>before I have to embarrass myself in comp.unix.shell?

This is probably not optimal, but it seems to work:

(exec 4>&1;((echo a; echo b>&2; echo c>&3))>&4 3>&1 | cat > 1); cat 1; rm 1

so you could probably use:

	(exec 4>&1;prog2 >&4 3>&1 | prog2)

Sm