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Re: HERE document mystery


From: Paul Jarc
Subject: Re: HERE document mystery
Date: Thu, 15 Dec 2005 11:17:09 -0500
User-agent: Gnus/5.110003 (No Gnus v0.3) Emacs/21.4 (gnu/linux)

"Com MN PG P E B Consultant 3" <address@hidden> wrote:
> echo THIS DOES NOT WORK
> foo=$(cat exp_test <<BAD | tr -d V= | grep '[0-9]*')
> V=1234
> abcd
> BAD

0. Since you passed a file name to cat, it will ignore stdin.
1. Since the here-document belongs to the command in $(), the
   here-document must also be entirely inside $().  Move the closing )
   after "BAD".
2. [0-9]* matches every line, since * matches 0 or more occurrences.


paul




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