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  1. or download this
    '/var/tmp/otherdir/symdir/../datadir' => '/var/tmp/otherdir/datadir'
'/var/tmp/mydir/../datadir' => '/var/tmp/datadir'
  2. or download this
    Finding a data path:

...
dirname($0):/usr/local/bin/../datadir
dirname(rel2abs($0)):/usr/local/bin/../datadir
$FindBin::RealBin:/var/tmp/mydir/../datadir
  3. or download this
    dirname(rel2abs($0)) . "/../datadir"
  4. or download this
    $FindBin::RealBin . "/../datadir"