/**
* Check that we have a correct CLI executable of PHP.
*
* @return void
*/
public function doTest()
{
$this->setMessage('Check if PHP may spawn processes.');
if (!FunctionAvailabilityCheck::isFunctionDefined('proc_open')) {
$this->markFailed('The process execution relies on proc_open, which is not available on your PHP installation.');
return;
}
if (FunctionAvailabilityCheck::isFunctionBlacklistedInSuhosin('proc_open')) {
$this->markFailed('The process execution relies on proc_open, which is disabled in Suhosin on your PHP installation. ' . 'Please remove "proc_open" from "suhosin.executor.func.blacklist" in php.ini');
return;
}
if (FunctionAvailabilityCheck::isFunctionBlacklistedInPhpIni('proc_open')) {
$this->markFailed('The process execution relies on proc_open, which is disabled in your PHP installation. ' . 'Please remove "proc_open" from "disabled_functions" in php.ini');
return;
}
$this->markSuccess();
}
/**
* Try to fork.
*
* The return value determines if the caller shall exit (when forking was successful and it is the forking process)
* or rather proceed execution (is the fork or unable to fork).
*
* True means exit, false means go on in this process.
*
* @return bool
*
* @throws \RuntimeException When the forking caused an error.
*/
private function fork()
{
/** @var LoggerInterface $logger */
$logger = $this->getContainer()->get('logger');
if (!$this->getContainer()->get('tenside.config')->isForkingAvailable()) {
$logger->warning('Forking disabled by configuration, execution will block until the command has finished.');
return false;
} elseif (!FunctionAvailabilityCheck::isFunctionEnabled('pcntl_fork', 'pcntl')) {
$logger->warning('pcntl_fork() is not available, execution will block until the command has finished.');
return false;
} else {
$pid = pcntl_fork();
if (-1 === $pid) {
throw new \RuntimeException('pcntl_fork() returned -1.');
} elseif (0 !== $pid) {
// Tell the calling method to exit now.
$logger->info('Forked process ' . posix_getpid() . ' to pid ' . $pid);
return true;
}
$logger->info('Processing task in forked process with pid ' . posix_getpid());
return false;
}
}