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Date: Tue, 14 Oct 2008 13:35:07 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
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Subject: Re: recently introduced egrep problem
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On Oct 14 07:16, rick lavery wrote:
> Up until a recent release of grep I could execute this command in
> cygwin and it worked without any problems.
> 
> echo 20081013193545 | egrep -Eo '[0-9]{1,2}'
> 
> This same command still works on other distributions such as centos,
> rhel4, rhel5, fedora core 9, etc.
> 
> in cygwin:
> $ echo 20081013193545 | egrep -Eo '[0-9]{1,2}'
> egrep: unknown option -- E
> Usage: egrep [OPTION]... PATTERN [FILE]...
> Try `egrep --help' for more information.
> 
> in other distros:
> $ echo 20081013193545 | egrep -Eo '[0-9]{1,2}'
> 20
> 08
> 10
> 13
> 19
> 35
> 45

Disabling -E/-F/-G/-P in egrep/fgrep is an upstream decision.  Actually
egrep and fgrep are deprecated, see `egrep --help' Other distros are
using older grep versions, that's why it still works there.  And, btw,
egrep -E is a tautology anyway.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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