Mail Archives: cygwin/2004/11/04/18:06:54
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.
I saw that the output differs between perl-5.6.1 and perl-5.8.5 with the
example from the OP.
This means that someone should file a bug report to the perlbug
facility. I rewrote the example, and then I saw that perl does the
right thing on 'normal' filehandles, but obviously not if the filehandle
is STDOUT.
Gerrit
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