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From: tif@doorstop.austin.ibm.com (Paul Chamberlain)
Newsgroups: comp.unix.questions
Subject: Re: C-shell programming
Keywords: csh, multiple file input
Message-ID: <3039@awdprime.UUCP>
Date: 3 Aug 90 18:41:13 GMT
References: <230@jabberwock.shs.ohio-state.edu>
Sender: news@awdprime.UUCP
Reply-To: tif@doorstop.austin.ibm.com (Paul Chamberlain)
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Organization: IBM AWD, Austin, TX
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In article <230@jabberwock.shs.ohio-state.edu> reiner@jabberwock.shs.ohio-state.edu (Reiner Wilhelms) writes:
>I'd like to create a c shell program which reads from 3 files and
>generates 1 (or more ) output file(s). 
>Calling this csh script will look like this:
>	% my_shell_script input1 input2 input3  output

A bourne shell script could use the 3< 4< etc. syntax like this

	:
	(
	read from_filename1 <&3
	read from_filename2 <&4
	read from_filename3 <&5
	echo to_filename_4 >&6
	) 3< $1 4< $2 5< $3 6> $4

I haven't tried this but it's at least close.  I don't think
csh has an equivalent feature.  I think you can use "{" and "}"
instead of "(" and ")" to be more efficient (one less process).

Paul Chamberlain | I do NOT represent IBM         tif@doorstop, sc30661@ausvm6
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