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print (open(FH,"<".$log) ? "opened" : "unable to open $!"), "\n";

Found in /usr/lib/perl5/5.8.0/pod/perlfaq6.pod
  What's wrong with using grep or map in a void context?
...
    system() also provides direct control over whether shell
    wildcard pro- cessing may take place, whereas backticks
    do not.