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Date:	Sun, 25 Jun 2006 21:30:59 +0100
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To:	David Mastronarde <mast AT colorado DOT edu>
CC:	cygwin AT cygwin DOT com
Subject:	Re: sed 4.1.5 adds extra CR with input file path in Windows format
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From:	Dave <kilroyd AT googlemail DOT com>
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David Mastronarde wrote:
> After upgrading sed from 4.1.4 to 4.1.5, I found that line endings were
> being converted from CRLF to CRCRLF when the input file was specified
> with a windows file path:
> 
> % sed -e 's/g5a/setname/g' < 'c:\cygwin\home\mast/sedtestin' > ! sedtestout
> 
> Converting the path to cygwin format eliminated the problem.
> 

> C:\cygwin                          /                         system  textmode
> C:\cygwin/bin                      /usr/bin                  system  textmode
> C:\cygwin/lib                      /usr/lib                  system  textmode
> C:\cygwin\usr\X11R6\lib\X11\fonts  /usr/X11R6/lib/X11/fonts  system  binmode
> .                                  /cygdrive                 system  textmode,cygdrive

Have a read of http://cygwin.com/cygwin-ug-net/using-textbinary.html

Stepping through it:
% sed -e 's/g5a/setname/g' < 'c:\cygwin\home\mast/sedtestin' > ! sedtestout

rule b. sedtestin input will be read in binary mode. i.e it reads \r\n

redirection of input is done in binmode from rule c.
ditto output redirection.

writing of the file is done in textmode due to your mounts (rule a). 
Hence \r\n coming out of sed becomes \r\r\n.

Try specifying the output file in MSDOS format, '.\sedtestout'.


Dave.

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