Mail Archives: cygwin/2004/11/04/17:12:43
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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