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Date: Sun, 21 Aug 2005 12:26:47 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: cygwin AT cygwin DOT com
Subject: Perl binmode problems on text mounts
Message-ID: <Pine.GSO.4.61.0508211211150.16057@slinky.cs.nyu.edu>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

I'm trying to make sure our perl program works with text mounts.  In the
course of the testing, one weird problem cropped up: binmode seems to have
no effect on STDOUT when redirecting to a file on a text mount.

The following consistently reproduces the problem for me:

$ mount -m | grep text
mount -f -u -t "c:/cygwin/tmp/text" "/tmp/text"
$ cd /tmp/text
$ /usr/bin/perl -e 'binmode(STDOUT);print "\n"' > PT
$ od -c PT
0000000  \r  \n
0000002
$

I've tried various combinations of ":raw", ":perlio", etc, both directly
and through the PERLIO variable, with no success.  The strace output
(available upon request) seems to show that the handle is successfully set
to binary mode, but that the write still happens in text mode.

Can anyone else reproduce this?  Is there a way I can force binary mode on
STDOUT in Perl?
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

If there's any real truth it's that the entire multidimensional infinity
of the Universe is almost certainly being run by a bunch of maniacs. /DA

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