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From:	"Joe Hagen" <jdhagen AT chorus DOT net>
To:	<cygwin AT cygwin DOT com>
References:	<200209041400 DOT g84E0T2H015234 AT im1 DOT sec DOT tds DOT net> <3D7625E2 DOT 8040109 AT DeFaria DOT com> <3D7661BE DOT 3000903 AT Salira DOT com>
Subject:	Re: File reading problem with -mno-cygwin
Date:	Wed, 4 Sep 2002 22:53:03 -0500
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Andrew DeFaria wrote:
> 
> One question remains however and that is why would it work in Cygwin
> but not in -mno-cygwin? My theory is that opening a file with "r"
> under Cygwin is equivalent to "rb".

Andrew,

Using the -mno-cygwin option directs the code to link
against MSVCRT.DLL, so Cygwin is bypassed completely.

If you examine the Microsoft C runtime source, you'll see that
they explicitly check for a CTRL-Z as an end-of-file marker
if a file is opened in text mode.  I think this behavior, along with
the LF to CRLF conversions, is an extension that is done by
Microsoft if you're in text mode.  

I don't believe the Cygwin runtime treats CTRL-Z as a special case,
which explains the difference.

The CTRL-Z as EOF was a leftover from CP/M, but got propgated
into MSDOS/Windows.


Joe


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