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            _pipe(*TO_CHLD_R,     *TO_CHLD_W    ) or die $!;
        _pipe(*FR_CHLD_R,     *FR_CHLD_W    ) or die $!;
        _pipe(*FR_CHLD_ERR_R, *FR_CHLD_ERR_W) or die $!;
  2. or download this
            _pipe(*TO_CHLD_R,     *TO_CHLD_W    ) or die $^E;
        _pipe(*FR_CHLD_R,     *FR_CHLD_W    ) or die $^E;
        _pipe(*FR_CHLD_ERR_R, *FR_CHLD_ERR_W) or die $^E;