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authorredmatrix <git@macgirvin.com>2016-05-10 12:12:20 +1000
committerredmatrix <git@macgirvin.com>2016-05-10 12:12:20 +1000
commitb7e7ef0bf3ad47729ef45282a92a78f0dc0e3ec4 (patch)
tree2e4f069d66885c5ca5b77154e9dd5a43ec004ff5 /library/symfony/process/Pipes/WindowsPipes.php
parentea1173f8f632151d02c71fe6004c6a64d014e80a (diff)
parent0b8a7f1bd03edb2bb18eb050fcb0b482d0e231be (diff)
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Merge pull request #372 from anaqreon/plugin-repo
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Diffstat (limited to 'library/symfony/process/Pipes/WindowsPipes.php')
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diff --git a/library/symfony/process/Pipes/WindowsPipes.php b/library/symfony/process/Pipes/WindowsPipes.php
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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
+ $this->files = array(
+ Process::STDOUT => tempnam(sys_get_temp_dir(), 'out_sf_proc'),
+ Process::STDERR => tempnam(sys_get_temp_dir(), 'err_sf_proc'),
+ );
+ foreach ($this->files as $offset => $file) {
+ if (false === $file || false === $this->fileHandles[$offset] = fopen($file, 'rb')) {
+ throw new RuntimeException('A temporary file could not be opened to write the process output to, verify that your TEMP environment variable is writable');
+ }
+ }
+ }
+
+ if (is_resource($input)) {
+ $this->input = $input;
+ } else {
+ $this->inputBuffer = $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)
+ {
+ $this->write($blocking, $close);
+
+ $read = array();
+ $fh = $this->fileHandles;
+ foreach ($fh as $type => $fileHandle) {
+ if (0 !== fseek($fileHandle, $this->readBytes[$type])) {
+ continue;
+ }
+ $data = '';
+ $dataread = null;
+ while (!feof($fileHandle)) {
+ if (false !== $dataread = fread($fileHandle, self::CHUNK_SIZE)) {
+ $data .= $dataread;
+ }
+ }
+ if (0 < $length = strlen($data)) {
+ $this->readBytes[$type] += $length;
+ $read[$type] = $data;
+ }
+
+ if (false === $dataread || (true === $close && feof($fileHandle) && '' === $data)) {
+ fclose($this->fileHandles[$type]);
+ unset($this->fileHandles[$type]);
+ }
+ }
+
+ return $read;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function areOpen()
+ {
+ return (bool) $this->pipes && (bool) $this->fileHandles;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function close()
+ {
+ parent::close();
+ foreach ($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();
+ }
+
+ /**
+ * Writes input to stdin.
+ *
+ * @param bool $blocking
+ * @param bool $close
+ */
+ private function write($blocking, $close)
+ {
+ if (empty($this->pipes)) {
+ return;
+ }
+
+ $this->unblock();
+
+ $r = null !== $this->input ? array('input' => $this->input) : null;
+ $w = isset($this->pipes[0]) ? array($this->pipes[0]) : null;
+ $e = null;
+
+ // let's have a look if something changed in streams
+ if (false === $n = @stream_select($r, $w, $e, 0, $blocking ? Process::TIMEOUT_PRECISION * 1E6 : 0)) {
+ // if a system call has been interrupted, forget about it, let's try again
+ // otherwise, an error occurred, let's reset pipes
+ if (!$this->hasSystemCallBeenInterrupted()) {
+ $this->pipes = array();
+ }
+
+ return;
+ }
+
+ // nothing has changed
+ if (0 === $n) {
+ return;
+ }
+
+ if (null !== $w && 0 < count($r)) {
+ $data = '';
+ while ($dataread = fread($r['input'], self::CHUNK_SIZE)) {
+ $data .= $dataread;
+ }
+
+ $this->inputBuffer .= $data;
+
+ if (false === $data || (true === $close && feof($r['input']) && '' === $data)) {
+ // no more data to read on input resource
+ // use an empty buffer in the next reads
+ $this->input = null;
+ }
+ }
+
+ if (null !== $w && 0 < count($w)) {
+ while (strlen($this->inputBuffer)) {
+ $written = fwrite($w[0], $this->inputBuffer, 2 << 18);
+ if ($written > 0) {
+ $this->inputBuffer = (string) substr($this->inputBuffer, $written);
+ } else {
+ break;
+ }
+ }
+ }
+
+ // no input to read on resource, buffer is empty and stdin still open
+ if ('' === $this->inputBuffer && null === $this->input && isset($this->pipes[0])) {
+ fclose($this->pipes[0]);
+ unset($this->pipes[0]);
+ }
+ }
+}