Re: strict grep when patterns are presented on standard input

From: Dana French (dfrench_at_mtxia.com)
Date: 07/28/04 

Date: 28 Jul 2004 12:05:08 -0700

ariel.burbaickij@gmail.com (Ariel Burbaickij) wrote in message news:<3058f9b4.0407280407.74335d3d@posting.google.com>...
> Hello dear newsgroup participants,
>
> I have following problem:
> I would like to greo for some let us say IP addresses
> in /etc/hosts file. Grep is used in the pipe of commands
> and it is not known ahead of time what IP addresses will
> be presented to grep, so grep is used with -f - option.
> In the file entries of both 192.168.111.11 and 192.168.111.112
> are presented,only 192.168.111.11 is presented to the grep on
> standard input but both are presented on the standard output
> because they both contain the same string. Now my question:
> Can strict option/quotes etc. be applied to the grep when it becomes
> its arguments from standard input in the pipe (i.e. as standard output from
> other command)? Clear, I can add just another sed command to the pipe
> that will prepend and append quote sign but I so far it would be interesting
> to understand whether it goes directly with grep or not
>
>
> With Best Regards
> Ariel Burbaickij

I may need to fire up Visio to diagram that question..... Let me see
if I am understanding correctly.

 You want to use the output from a grep (maybe sed too) as the regular
expression argument to another grep command??? Is that right???

--------------------------------------------------------
Dana French dfrench@mtxia.com
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