GNU bug report logs - #37754
wish for grep --and -eX -eY -eZ (X∩Y∩Z intersection, not X∪Y∪Z union)

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: "Trent W. Buck" <trentbuck <at> gmail.com>
Cc: 37754 <at> debbugs.gnu.org
Subject: bug#37754: wish for grep --and -eX -eY -eZ (X∩Y∩Z intersection, not X∪Y∪Z union)
Date: Thu, 17 Oct 2019 01:27:35 -0700

On 10/16/19 5:19 PM, Trent W. Buck wrote:
> I would expect "grep -Fw -e 4GB -e DDR4 --and" to print the same thing as
> 
>      grep -Fw 4GB | grep -Fw DDR4 | grep -Fw -e 4GB -e DDR4 -o

You're right, it's not obvious. :-)

It may be better to just pipe greps together, as you do now. That's simple and 
fast enough for this relatively-uncommon case, and it's portable to all greps.

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