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Re: egrep: question
From: |
Bob Proulx |
Subject: |
Re: egrep: question |
Date: |
Wed, 10 Dec 2003 22:21:41 -0700 |
User-agent: |
Mutt/1.3.28i |
Jeremy C. Reed wrote:
> roni wrote:
> > i'd like to search a file, and every time i bump into the word
> > "start", i'd like to print out all lines until i bump into the word "stop".
> > and then proceed.. - to print out all the paragraphs in that file that
> > start with "start" and end with "stop".
>
> Try sed.
> Have a look in the "sedfaq". It has examples.
Of course I am sure you can do it in sed. But the way to have the
process repeat for multiple sets of start and stop blocks escapes me
at this moment.
I think in this case I would use Awk, Perl, or my personal preference
of Ruby. In this case the Ruby and Perl programs can be identical.
If it was really this simple I would use Awk since it so prevalent.
awk '/start/,/stop/{print}'
ruby -lne 'print if /start/ .. /stop/'
perl -lne 'print if /start/ .. /stop/'
As to your original question about grep/egrep, it does not have
decision making capabilities and switching on and off such as this is
out of scope for it. You need to use one of the other programs.
Bob