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- <?php
- /*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- namespace Symfony\Component\Process\Pipes;
- use Symfony\Component\Process\Exception\RuntimeException;
- use Symfony\Component\Process\Process;
- /**
- * WindowsPipes implementation uses temporary files as handles.
- *
- * @see https://bugs.php.net/bug.php?id=51800
- * @see https://bugs.php.net/bug.php?id=65650
- *
- * @author Romain Neutron <imprec@gmail.com>
- *
- * @internal
- */
- class WindowsPipes extends AbstractPipes
- {
- private $files = array();
- private $fileHandles = array();
- private $lockHandles = array();
- private $readBytes = array(
- Process::STDOUT => 0,
- Process::STDERR => 0,
- );
- private $disableOutput;
- public function __construct($disableOutput, $input)
- {
- $this->disableOutput = (bool) $disableOutput;
- if (!$this->disableOutput) {
- // Fix for PHP bug #51800: reading from STDOUT pipe hangs forever on Windows if the output is too big.
- // Workaround for this problem is to use temporary files instead of pipes on Windows platform.
- //
- // @see https://bugs.php.net/bug.php?id=51800
- $pipes = array(
- Process::STDOUT => Process::OUT,
- Process::STDERR => Process::ERR,
- );
- $tmpDir = sys_get_temp_dir();
- $lastError = 'unknown reason';
- set_error_handler(function ($type, $msg) use (&$lastError) { $lastError = $msg; });
- for ($i = 0;; ++$i) {
- foreach ($pipes as $pipe => $name) {
- $file = sprintf('%s\\sf_proc_%02X.%s', $tmpDir, $i, $name);
- if (!$h = fopen($file.'.lock', 'w')) {
- restore_error_handler();
- throw new RuntimeException(sprintf('A temporary file could not be opened to write the process output: %s', $lastError));
- }
- if (!flock($h, LOCK_EX | LOCK_NB)) {
- continue 2;
- }
- if (isset($this->lockHandles[$pipe])) {
- flock($this->lockHandles[$pipe], LOCK_UN);
- fclose($this->lockHandles[$pipe]);
- }
- $this->lockHandles[$pipe] = $h;
- if (!fclose(fopen($file, 'w')) || !$h = fopen($file, 'r')) {
- flock($this->lockHandles[$pipe], LOCK_UN);
- fclose($this->lockHandles[$pipe]);
- unset($this->lockHandles[$pipe]);
- continue 2;
- }
- $this->fileHandles[$pipe] = $h;
- $this->files[$pipe] = $file;
- }
- break;
- }
- restore_error_handler();
- }
- parent::__construct($input);
- }
- public function __destruct()
- {
- $this->close();
- }
- /**
- * {@inheritdoc}
- */
- public function getDescriptors()
- {
- if ($this->disableOutput) {
- $nullstream = fopen('NUL', 'c');
- return array(
- array('pipe', 'r'),
- $nullstream,
- $nullstream,
- );
- }
- // We're not using pipe on Windows platform as it hangs (https://bugs.php.net/bug.php?id=51800)
- // We're not using file handles as it can produce corrupted output https://bugs.php.net/bug.php?id=65650
- // So we redirect output within the commandline and pass the nul device to the process
- return array(
- array('pipe', 'r'),
- array('file', 'NUL', 'w'),
- array('file', 'NUL', 'w'),
- );
- }
- /**
- * {@inheritdoc}
- */
- public function getFiles()
- {
- return $this->files;
- }
- /**
- * {@inheritdoc}
- */
- public function readAndWrite($blocking, $close = false)
- {
- $this->unblock();
- $w = $this->write();
- $read = $r = $e = array();
- if ($blocking) {
- if ($w) {
- @stream_select($r, $w, $e, 0, Process::TIMEOUT_PRECISION * 1E6);
- } elseif ($this->fileHandles) {
- usleep(Process::TIMEOUT_PRECISION * 1E6);
- }
- }
- foreach ($this->fileHandles as $type => $fileHandle) {
- $data = stream_get_contents($fileHandle, -1, $this->readBytes[$type]);
- if (isset($data[0])) {
- $this->readBytes[$type] += \strlen($data);
- $read[$type] = $data;
- }
- if ($close) {
- ftruncate($fileHandle, 0);
- fclose($fileHandle);
- flock($this->lockHandles[$type], LOCK_UN);
- fclose($this->lockHandles[$type]);
- unset($this->fileHandles[$type], $this->lockHandles[$type]);
- }
- }
- return $read;
- }
- /**
- * {@inheritdoc}
- */
- public function areOpen()
- {
- return $this->pipes && $this->fileHandles;
- }
- /**
- * {@inheritdoc}
- */
- public function close()
- {
- parent::close();
- foreach ($this->fileHandles as $type => $handle) {
- ftruncate($handle, 0);
- fclose($handle);
- flock($this->lockHandles[$type], LOCK_UN);
- fclose($this->lockHandles[$type]);
- }
- $this->fileHandles = $this->lockHandles = array();
- }
- /**
- * Creates a new WindowsPipes instance.
- *
- * @param Process $process The process
- * @param $input
- *
- * @return static
- */
- public static function create(Process $process, $input)
- {
- return new static($process->isOutputDisabled(), $input);
- }
- }
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