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X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Tue, 22 Apr 2003 19:54:17 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: "Pierre A. Humblet" <pierre DOT humblet AT ieee DOT org>
cc: cygwin AT cygwin DOT com
Subject: Re: Erroneous line endings (cat,gawk,text mount)
In-Reply-To: <20030422232407.GA41890375@hpn5170x>
Message-ID: <Pine.GSO.4.44.0304221942520.19398-100000@slinky.cs.nyu.edu>
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On Tue, 22 Apr 2003, Pierre A. Humblet wrote:

> On Tue, Apr 22, 2003 at 10:54:41PM +0100, Peter S Tillier wrote:
> > Replying to Igor Pechtchanski who wrote:
> >
> > > Also, "cat" will not translate line endings or anything at all --
> > > it's just a character-by-character copy of stdin to stdout.
> >
> > Fair enough (and what I expect it to be) thanks for the clarification.
>
> Igor, how do you explain the following behavior?
> ~: od -c
> abc
> 0000000   a   b   c  \n
> 0000004
> ~: cat | od -c
> abc
> 0000000   a   b   c  \r  \n
> 0000005
> This is with CYGWIN undefined and stty -igncr icrnl
> I get the \r no matter what I try for CYGWIN and stty.
>
> Pierre

Pierre,

Simple - cat opens files (including stdin) in binary mode, and a Return on
the console apparently sends a CRLF.  Try, for example, "cat -s" -- it
opens stdin in text mode, and you will not get a CR.  I don't think there
currently is an option that controls whether a console Return sends a CR.
Intuitively, IMO, it should also be controlled by "binmode".  I'm guessing
it's just a matter of copying some code from pipe.cc to fhandler_console.cc
	Igor
-- 
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     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

Knowledge is an unending adventure at the edge of uncertainty.
  -- Leto II


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