Icicle\Concurrent\Process\Process::start PHP Метод

    public function start()
    {
        if (null !== $this->delayed) {
            throw new StatusError('The process has already been started.');
        }
        $this->delayed = new Delayed();
        $fd = [['pipe', 'r'], ['pipe', 'w'], ['pipe', 'a'], ['pipe', 'w']];
        $nd = 0 === strncasecmp(PHP_OS, 'WIN', 3) ? 'NUL' : '/dev/null';
        $command = sprintf('(%s) 3>%s; code=$?; echo $code >&3; exit $code', $this->command, $nd);
        $this->process = proc_open($command, $fd, $pipes, $this->cwd ?: null, $this->env ?: null, $this->options);
        if (!is_resource($this->process)) {
            throw new ProcessException('Could not start process.');
        }
        $this->oid = getmypid();
        $status = proc_get_status($this->process);
        if (!$status) {
            proc_close($this->process);
            $this->process = null;
            throw new ProcessException('Could not get process status.');
        }
        $this->pid = $status['pid'];
        $this->stdin = new WritablePipe($pipes[0]);
        $this->stdout = new ReadablePipe($pipes[1]);
        $this->stderr = new ReadablePipe($pipes[2]);
        $stream = $pipes[3];
        stream_set_blocking($stream, 0);
        $this->poll = Loop\poll($stream, function ($resource) {
            if (!is_resource($resource) || feof($resource)) {
                $this->close($resource);
                $this->delayed->reject(new ProcessException('Process ended unexpectedly.'));
            } else {
                $code = fread($resource, 1);
                $this->close($resource);
                if (!strlen($code) || !is_numeric($code)) {
                    $this->delayed->reject(new ProcessException('Process ended without providing a status code.'));
                } else {
                    $this->delayed->resolve((int) $code);
                }
            }
            $this->poll->free();
        });
    }

    /**
     * {@inheritdoc}
     */
    public function start()
    {
        $this->process->start();

        $this->channel = new Channel($this->process->getStdOut(), $this->process->getStdIn());
    }