Re: strange grep or tail behaviour

[Craig Sanders <cas@taz.net.au>]

On Tue, May 01, 2001 at 10:43:40PM -0700, Jeremy C. Reed wrote:
> Does anyone know of a grep that can use multiple expressions that some
> are reversed, for example, one grep that can do the same as "grep
> keyword | grep -v exclude" (without knowing the placement of the
> keywords in the line)?
>
> Or can anyone share some examples of using awk to do this?

use perl.  for example:

---cut here---
#! /usr/bin/perl

# arguments:
#   -i include regexp
#   -e exclude regexp
# remaining args are file(s) to search

use Getopt::Std ;

getopt('i:e:',\%opts);

# unbuffer output
$|=1;

while (<>) {
    next unless (/$opts{"i"}/io);
    next if (/$opts{"e"}/io) ;
    print ;
}
---cut here---



the -i and -e arguments are regular expressions, not just literal
strings so you can make them as simple or as complex as you like.

craig

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craig sanders <cas@taz.net.au>

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