Comos\Qpm\Process\Process::sendSignal PHP Method

    public function sendSignal($sig)
    {
        $result = \posix_kill($this->_pid, $sig);
        if (false === $result) {
            throw new FailToSendSignalException('fail to send signal ' . $sig . ' to process ' . $this->_pid);
        }
        return $result;
    }