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Date:	Thu, 22 Feb 2007 13:20:31 +0100
From:	Sven Severus <s DOT severus AT hima DOT com>
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Subject:	Re: Why binary mode?
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Thank you, Corinna.

Now I think I have a fundamental understandig problem:
I agree, that this behavior ist not to be expected in a binary 
mounted directory. I tested this for confirmation, according to 
your suggestion, and you are right.

But in a textmode mounted directory, 'echo peng >p.txt' creates
a 6 byte long file containing 'p' 'e' 'n' 'g' '\r' '\n'.
OK, exactly as expected. Now I thought, 'cat p.txt' would open 
this file for reading in textmode, according to the default rule.

This is, what I expect, after reading the Cygwin FAQ:
"When processing in text mode, [...] written to the file [...] 
you in fact get "Hello\r\n". Upon reading this combination, 
the \r is removed [...]".
Why is it in fact not removed when reading with cat?

Thanks for any response.

Best regards,
Sven



On Feb 22 11:29, Corinna Vinschen wrote:
>> $ mount
>> c:\cygwin\usr\X11R6\lib\X11\fonts on /usr/X11R6/lib/X11/fonts type system (binmode)
>> C:\cygwin\bin on /usr/bin type system (textmode)
>> C:\cygwin\lib on /usr/lib type system (textmode)
>> c:\cygwin\tmp on /tmp type system (binmode)
>> C:\cygwin on / type system (textmode)
>  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Your home is mounted textmode.
>
>> c: on /c type system (textmode)
>> $ pwd
>> /home/es_sv
>> $ echo peng >p.txt && CO=$(cat p.txt) && od -c <<<"$CO"
>> 0000000   p   e   n   g  \r  \n
>> 0000006
>
> Which explains this behaviour.  The tools are using the default mode,
> which is textmode in your case.  I suggest replacing all textmode
> mounts with binmode mounts.
>
>
> Corinna


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