Viewing file:  WindowsPipes.php (5.32 KB) -rw-r--r--
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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\Process;
use Symfony\Component\Process\Exception\RuntimeException;
/**
* 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
{
/** @var array */
private $files = array();
/** @var array */
private $fileHandles = array();
/** @var array */
private $readBytes = array(
Process::STDOUT => 0,
Process::STDERR => 0,
);
/** @var bool */
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,
);
$tmpDir = sys_get_temp_dir();
if (!@fopen($file = $tmpDir.'\\sf_proc_00.check', 'wb')) {
throw new RuntimeException('A temporary file could not be opened to write the process output to, verify that your TEMP environment variable is writable');
}
@unlink($file);
for ($i = 0;; ++$i) {
foreach ($pipes as $pipe => $name) {
$file = sprintf('%s\\sf_proc_%02X.%s', $tmpDir, $i, $name);
if (file_exists($file) && !@unlink($file)) {
continue 2;
}
$h = @fopen($file, 'xb');
if (!$h || !$this->fileHandles[$pipe] = fopen($file, 'rb')) {
continue 2;
}
if (isset($this->files[$pipe])) {
@unlink($this->files[$pipe]);
}
$this->files[$pipe] = $file;
}
break;
}
}
parent::__construct($input);
}
public function __destruct()
{
$this->close();
$this->removeFiles();
}
/**
* {@inheritdoc}
*/
public function getDescriptors()
{
if ($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) {
fclose($fileHandle);
unset($this->fileHandles[$type]);
}
}
return $read;
}
/**
* {@inheritdoc}
*/
public function areOpen()
{
return $this->pipes && $this->fileHandles;
}
/**
* {@inheritdoc}
*/
public function close()
{
parent::close();
foreach ($this->fileHandles as $handle) {
fclose($handle);
}
$this->fileHandles = array();
}
/**
* Creates a new WindowsPipes instance.
*
* @param Process $process The process
* @param $input
*
* @return WindowsPipes
*/
public static function create(Process $process, $input)
{
return new static($process->isOutputDisabled(), $input);
}
/**
* Removes temporary files.
*/
private function removeFiles()
{
foreach ($this->files as $filename) {
if (file_exists($filename)) {
@unlink($filename);
}
}
$this->files = array();
}
}
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