I would probably do this: 

my $has_unprintable_re = qr{ [^[:print:]] }x;

if  ( grep { /$has_unprintable_re/ } @{$memoryfile}[0,1] ) {
    LogMess( 'Error: Binary input data detected', 1 );
    return -1;
}

[download]
, even though your for&if does the same thing as my if&grep.

My first reading of your code made me say "Hmmm, it could print the error twice... {Re-reading} Oh, wait, the LogMess and the return are in the same statement, and the return will (of course) exit the loop."

In reply to Re^3: Any idea what this does by Util
in thread Any idea what this does by Anonymous Monk

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