/**
* Waits for the process to terminate.
*
* The callback receives the type of output (out or err) and some bytes
* from the output in real-time while writing the standard input to the process.
* It allows to have feedback from the independent process during execution.
*
* @param callable|null $callback A valid PHP callback
*
* @return int The exitcode of the process
*
* @throws RuntimeException When process timed out
* @throws RuntimeException When process stopped after receiving signal
* @throws LogicException When process is not yet started
*/
public function wait(callable $callback = null)
{
$this->requireProcessIsStarted(__FUNCTION__);
$this->updateStatus(false);
if (null !== $callback) {
if (!$this->processPipes->haveReadSupport()) {
$this->stop(0);
throw new \LogicException('Pass the callback to the Process:start method or enableOutput to use a callback with Process::wait');
}
$this->callback = $this->buildCallback($callback);
}
do {
$this->checkTimeout();
$running = '\\' === DIRECTORY_SEPARATOR ? $this->isRunning() : $this->processPipes->areOpen();
$close = '\\' !== DIRECTORY_SEPARATOR || !$running;
$this->readPipes(true, $close);
} while ($running);
while ($this->isRunning()) {
usleep(1000);
}
if ($this->processInformation['signaled'] && $this->processInformation['termsig'] !== $this->latestSignal) {
throw new RuntimeException(sprintf('The process has been signaled with signal "%s".', $this->processInformation['termsig']));
}
return $this->exitcode;
}
