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<?php |
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|
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/* |
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* This file is part of the Symfony package. |
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* |
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* (c) Fabien Potencier <fabien@symfony.com> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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|
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namespace Symfony\Component\Process\Pipes; |
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|
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use Symfony\Component\Process\Exception\InvalidArgumentException; |
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|
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/** |
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* @author Romain Neutron <imprec@gmail.com> |
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* |
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* @internal |
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*/ |
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abstract class AbstractPipes implements PipesInterface |
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{ |
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public $pipes = []; |
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|
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private $inputBuffer = ''; |
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private $input; |
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private $blocked = true; |
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private $lastError; |
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|
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/** |
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* @param resource|string|int|float|bool|\Iterator|null $input |
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*/ |
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public function __construct($input) |
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{ |
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if (\is_resource($input) || $input instanceof \Iterator) { |
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$this->input = $input; |
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} elseif (\is_string($input)) { |
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$this->inputBuffer = $input; |
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} else { |
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$this->inputBuffer = (string) $input; |
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} |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function close() |
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{ |
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foreach ($this->pipes as $pipe) { |
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fclose($pipe); |
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} |
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$this->pipes = []; |
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} |
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|
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/** |
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* Returns true if a system call has been interrupted. |
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* |
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* @return bool |
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*/ |
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protected function hasSystemCallBeenInterrupted() |
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{ |
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$lastError = $this->lastError; |
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$this->lastError = null; |
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|
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// stream_select returns false when the `select` system call is interrupted by an incoming signal |
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return null !== $lastError && false !== stripos($lastError, 'interrupted system call'); |
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} |
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|
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/** |
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* Unblocks streams. |
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*/ |
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protected function unblock() |
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{ |
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if (!$this->blocked) { |
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return; |
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} |
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|
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foreach ($this->pipes as $pipe) { |
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stream_set_blocking($pipe, 0); |
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} |
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if (\is_resource($this->input)) { |
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stream_set_blocking($this->input, 0); |
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} |
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|
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$this->blocked = false; |
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} |
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|
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/** |
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* Writes input to stdin. |
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* |
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* @return array|null |
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* |
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* @throws InvalidArgumentException When an input iterator yields a non supported value |
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*/ |
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protected function write() |
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{ |
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if (!isset($this->pipes[0])) { |
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return null; |
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} |
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$input = $this->input; |
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|
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if ($input instanceof \Iterator) { |
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if (!$input->valid()) { |
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$input = null; |
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} elseif (\is_resource($input = $input->current())) { |
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stream_set_blocking($input, 0); |
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} elseif (!isset($this->inputBuffer[0])) { |
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if (!\is_string($input)) { |
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if (!is_scalar($input)) { |
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throw new InvalidArgumentException(sprintf('"%s" yielded a value of type "%s", but only scalars and stream resources are supported.', \get_class($this->input), \gettype($input))); |
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} |
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$input = (string) $input; |
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} |
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$this->inputBuffer = $input; |
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$this->input->next(); |
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$input = null; |
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} else { |
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$input = null; |
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} |
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} |
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|
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$r = $e = []; |
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$w = [$this->pipes[0]]; |
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|
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// let's have a look if something changed in streams |
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if (false === @stream_select($r, $w, $e, 0, 0)) { |
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return null; |
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} |
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|
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foreach ($w as $stdin) { |
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if (isset($this->inputBuffer[0])) { |
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$written = fwrite($stdin, $this->inputBuffer); |
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$this->inputBuffer = substr($this->inputBuffer, $written); |
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if (isset($this->inputBuffer[0])) { |
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return [$this->pipes[0]]; |
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} |
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} |
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|
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if ($input) { |
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for (;;) { |
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$data = fread($input, self::CHUNK_SIZE); |
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if (!isset($data[0])) { |
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break; |
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} |
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$written = fwrite($stdin, $data); |
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$data = substr($data, $written); |
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if (isset($data[0])) { |
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$this->inputBuffer = $data; |
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|
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return [$this->pipes[0]]; |
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} |
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} |
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if (feof($input)) { |
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if ($this->input instanceof \Iterator) { |
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$this->input->next(); |
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} else { |
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$this->input = null; |
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} |
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} |
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} |
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} |
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|
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// no input to read on resource, buffer is empty |
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if (!isset($this->inputBuffer[0]) && !($this->input instanceof \Iterator ? $this->input->valid() : $this->input)) { |
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$this->input = null; |
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fclose($this->pipes[0]); |
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unset($this->pipes[0]); |
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} elseif (!$w) { |
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return [$this->pipes[0]]; |
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} |
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|
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return null; |
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} |
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|
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/** |
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* @internal |
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*/ |
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public function handleError($type, $msg) |
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{ |
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$this->lastError = $msg; |
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} |
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} |
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|
