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Postings from October 2003
Abigail <abigail@abigail.nl> writes:
>
>What undocumented features are you talking about?
>
>>From 'man perlopentut':
>
> Perl's "open" function was designed to mimic the way com
> mand-line redirection in the shell works.
>
>In the shell, dupping stderr for read works just fine.
>
>Furthermore, the ability to open STDERR for reading isn't a Perl specific
>side-effect; it's a UNIX thing.
It depends on the UNIX though - some of them are now getting standards
compliant fussy ...
>Finally, in Perl, including 5.8.1 and 5.9.0, dupping file-descriptor 2
>for reading works fine. This works ok:
>
> open STDERRIN, "<&2" or die $!;
Which seems to make a bizare kind of sense - that is how shell does
it after all so this makes your quote above true ;-)
>
>and this doesn't:
>
> open STDERRIN, "<&STDERR" or die $!;
What does
open STDERRIN, "<&=STDERR" or die $!;
do ?
Come to that does
open STDERRIN, "<+&STDERR" or die $!;
help ?
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