Date: Thu, 11 Oct 2001 16:09:11 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: JT Williams <jeffw AT darwin DOT sfbr DOT org>
cc: djgpp AT delorie DOT com
Subject: Re: duplicating stdin in shell script
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On Thu, 11 Oct 2001, JT Williams wrote:

> Is it possible/practical to duplicate stdin (without using tmp files)
> so that it can be scanned twice in a shell script?  If so, could someone
> please show me a shell idiom to do this?
> 
> For example, suppose I want to scan a tab-delimited text file to determine
> the maximum width of each field, so I can then pass stdin to `expand'
> using appropriate options.

You could copy stdin to a temporary file, and then work on that.