Re: Perl binmode problem on text mount

[Igor Pechtchanski <pechtcha at cs dot nyu dot edu>]

On Thu, 4 Nov 2004, Christopher Faylor wrote:

> On Thu, Nov 04, 2004 at 10:49:46PM +0100, Gerrit P. Haase wrote:
> >Christopher Faylor wrote:
> >>Pipes are binmode by default.
> >
> >That means they are just as pipes are ought to be, "what goes in comes
> >out again, not more and not less"?
> >
> >Or does it mean that a pipe always strips \r?  Then the cat example of
> >the OP doesn't count at all.
>
> binmode means there is no extra processing on the fd.  It is handled
> just like linux.  Linux doesn't add or subtract any characters when
> it is doing I/O.
>
> You're right, though.  The cat example really doesn't provide any useful
> details.  In fact, cat will output in text mode in some cases.
>
> The definitive test would be to run the older and newer versions of
> perl on the newest version of cygwin.  If the output using 'binmode'
> differs between the two then perl is doing something wrong.  If it
> is the same then cygwin is doing something wrong.
>
> cgf

I thought the OP did exactly that in
<http://cygwin.com/ml/cygwin/2004-11/msg00168.html>...

FWIW, the following two invocations of perl from a text mount differ in
their result:

perl -e 'open OUT,">q.txt";binmode OUT;print OUT "Hello\n"'
perl -e 'binmode STDOUT;print STDOUT "Hello\n"' > q.txt

HTH,
	Igor
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