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  1. or download this
    $dd_command = <<'EO_COMMAND';
   device=/dev/rmt8
...
$status  = ($? >> 8);
$signo   = ($? & 127);
$cored   = ($? & 128);
  2. or download this
    $dd_command = <<'EO_COMMAND';
   device=/dev/rmt8
...
$status  = ($? >> 8);
$signo   = ($? & 127);
$cored   = ($? & 128);
  3. or download this
    $kidpid = open(FROM_KID, "somecmd 3>&1 1>&2 2>&3 3>&- |") // die $!;
  4. or download this
    $fd3 = $fd1;
$fd1 = $fd2;
$fd2 = $fd3;
$fd3 = undef;