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Date: Wed, 04 Mar 2009 14:56:56 +0100
From: Peter Rosin <peda AT lysator DOT liu DOT se>
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Subject: Re: grep -P regexp problem
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Den 2009-03-03 19:26 skrev Andriy Sen:
> 
> Below is an example of the problem.
> 
> G:\>grep -V
> GNU grep 2.5.3
> 
> Copyright (C) 1988, 1992-2002, 2004, 2005  Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> 
> 
> G:\>cat test.s
> a
> 1
> 
> G:\>cat test.s | grep -P "[^0]1"
> a
> 1
> 
> G:\>

FYI, appears to not be cygwin specific...

$ uname -s -r
Linux 2.6.23-gentoo-r8
$ grep -V
grep (GNU grep) 2.5.1

Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ cat test.s
a
1
$ cat test.s | grep -P "[^0]1"
a
1
$ od -a test.s
0000000   a  nl   1  nl
0000004

Cheers,
Peter

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