As a preventive measure, I'd suggest restructuring code to make use of lexical filehandles as shown. Always open a lexical $FH in a BLOCK:
{
    open(my $FH, "<", $filename)
        or die("Cannot open: $filename\n  $!");

    while (<$FH>) { ... };

    # unnecessary - $FH gets closed once it leaves lexical scope
    #close($FH);
}

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In reply to Re: How to test for open file handles? by repellent
in thread How to test for open file handles? by jdrago_999

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