Did I miss something (upd.: yes, I did) or couldn't this be cut down to simply: 
use subs 'open';
sub open {
    print @_ . "parameters: @_\n";
    CORE::open(@_[0..$#_]);
}

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(I didn't test anything, so I may well be way off the mark.)

Makeshifts last the longest.

In reply to Re^3: use subs by Aristotle
in thread use subs by blahblahblah

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