I'm not too familiar with the PerlIO stuff, but it sure isn't in Perl 5.5.3 (but open my $fh isn't either), and I'm not sure if it is in Perl5.6.1. In any case it is necessary that the Perl is built with the slower PerlIO layer and I suspect weird distros like RedHat to build a Perl without it.

In reply to Re^3: Binary Reading Questions by Corion
in thread Binary Reading Questions by Eyeth

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