bin/125325: Annoying grep(1) bug

[Wayne Sierke]

The following reply was made to PR bin/125325; it has been noted by GNATS.

From: Wayne Sierke <ws at au.dyndns.ws>
To: Ighighi <ighighi at gmail.com>
Cc: bug-followup at freebsd.org
Subject: Re: bin/125325: Annoying grep(1) bug
Date: Tue, 08 Jul 2008 03:29:16 +0930

 On Sun, 2008-07-06 at 04:50 +0000, Ighighi wrote:
 > 
 > $ env -i /usr/bin/grep --colour=always :0: /etc/passwd
 > root:*:0:0:Charlie &:/root:/usr/local/bin/bash
 > toor:*:0:0:Bourne-again Superuser:/root:
 > 
 > The entire ":0:0:" should be colorized.
 
 Note that this is probably to do with pattern-matching rather than
 colouring:
 
         %env -i /usr/bin/grep --only-matching :0: /etc/passwd
         :0:
         :0:
         %/usr/bin/grep --version
         grep (GNU grep) 2.5.1-FreeBSD
         
         ...
         
 
 Testing with ubuntu-8.04.1:
         
         ws at ubuntu:~$ env -i /bin/grep --colour=always :0: /etc/passwd
         root:x:0:0:root:/root:/bin/bash
         ws at ubuntu:~$ env -i /bin/grep --only-matching :0: /etc/passwd
         :0:
         ws at ubuntu:~$ /bin/grep --version
         GNU grep 2.5.3
         
         ...
 
 
 (only the first :0: is coloured in the first result). 
 
 2.5.3 seems to be the latest version of GNU grep.
 
 It's not clear that failing to match overlapped instances of patterns is
 a bug.