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From: "Dave Korn" <dk AT artimi DOT com>
To: <cygwin AT cygwin DOT com>
Subject: RE: Grep and matching end of line (anchoring)
Date: Fri, 19 Nov 2004 18:29:43 -0000
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In-Reply-To: <F76C9B2DA2FC4C4CA0A18E288BBCBCF71026EB0B@nihexchange24.nih.gov>
Message-ID: <NUTMEGc0xvlUQ9cAgjH000000f0@NUTMEG.CAM.ARTIMI.COM>
X-OriginalArrivalTime: 19 Nov 2004 18:29:43.0437 (UTC) FILETIME=[BD3173D0:01C4CE65]

> -----Original Message-----
> From: cygwin-owner On Behalf Of Buchbinder, Barry (NIH/NIAID)
> Sent: 19 November 2004 15:17

> This should work whether or not one is on a text mount or for 
> the file has DOS or Unix line endings:
>
> 	cat files.txt | grep -E '\.h^M?$'

  Always test before posting.  Even a one liner.  That doesn't work, or at
least NFM:

dk AT mace /test/grep-test> od -c test.dos.txt
0000000   H   e   l   l   o       w   o   r   l   d  \r  \n
0000015
dk AT mace /test/grep-test> od -c test.unix.txt
0000000   H   e   l   l   o       w   o   r   l   d  \n
0000014
dk AT mace /test/grep-test> grep -E 'ld^M?$' *
dk AT mace /test/grep-test> grep -E 'd^M?$' *
dk AT mace /test/grep-test> grep -E '.^M?$' *
dk AT mace /test/grep-test>

  Grep knows there's a char there, but it won't match it with ^M.

dk AT mace /test/grep-test> grep -E '.$' *
test.dos.txt:Hello world
test.unix.txt:Hello world
dk AT mace /test/grep-test> grep -E 'd.$' *
test.dos.txt:Hello world
dk AT mace /test/grep-test> grep -E 'd^M$' *
dk AT mace /test/grep-test> grep -E 'd^m$' *
dk AT mace /test/grep-test>


  What makes you think grep understands ^ notation to indicate control
chars?  It doesn't say so in the info page.  (It doesn't recognize [\r]
either.)

  Actually, it seems that grep

    cheers, 
      DaveK
-- 
Can't think of a witty .sigline today....


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