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Edit File : AbstractPipes.php \| Size : 4.88 KB
<?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\InvalidArgumentException; /* * @author Romain Neutron <imprec@gmail.com> * * @internal / abstract class AbstractPipes implements PipesInterface { public $pipes = []; private $inputBuffer = ''; private $input; private $blocked = true; private $lastError; /* * @param resource\|string\|int\|float\|bool\|\Iterator\|null $input / public function __construct($input) { if (\is_resource($input) \|\| $input instanceof \Iterator) { $this->input = $input; } elseif (\is_string($input)) { $this->inputBuffer = $input; } else { $this->inputBuffer = (string) $input; } } /* * {@inheritdoc} / public function close() { foreach ($this->pipes as $pipe) { fclose($pipe); } $this->pipes = []; } /* * Returns true if a system call has been interrupted. / protected function hasSystemCallBeenInterrupted(): bool { $lastError = $this->lastError; $this->lastError = null; // stream_select returns false when the `select` system call is interrupted by an incoming signal return null !== $lastError && false !== stripos($lastError, 'interrupted system call'); } /* * Unblocks streams. / protected function unblock() { if (!$this->blocked) { return; } foreach ($this->pipes as $pipe) { stream_set_blocking($pipe, 0); } if (\is_resource($this->input)) { stream_set_blocking($this->input, 0); } $this->blocked = false; } /* * Writes input to stdin. * * @throws InvalidArgumentException When an input iterator yields a non supported value / protected function write(): ?array { if (!isset($this->pipes[0])) { return null; } $input = $this->input; if ($input instanceof \Iterator) { if (!$input->valid()) { $input = null; } elseif (\is_resource($input = $input->current())) { stream_set_blocking($input, 0); } elseif (!isset($this->inputBuffer[0])) { if (!\is_string($input)) { if (!is_scalar($input)) { throw new InvalidArgumentException(sprintf('"%s" yielded a value of type "%s", but only scalars and stream resources are supported.', \get_class($this->input), \gettype($input))); } $input = (string) $input; } $this->inputBuffer = $input; $this->input->next(); $input = null; } else { $input = null; } } $r = $e = []; $w = [$this->pipes[0]]; // let's have a look if something changed in streams if (false === @stream_select($r, $w, $e, 0, 0)) { return null; } foreach ($w as $stdin) { if (isset($this->inputBuffer[0])) { $written = fwrite($stdin, $this->inputBuffer); $this->inputBuffer = substr($this->inputBuffer, $written); if (isset($this->inputBuffer[0])) { return [$this->pipes[0]]; } } if ($input) { for (;;) { $data = fread($input, self::CHUNK_SIZE); if (!isset($data[0])) { break; } $written = fwrite($stdin, $data); $data = substr($data, $written); if (isset($data[0])) { $this->inputBuffer = $data; return [$this->pipes[0]]; } } if (feof($input)) { if ($this->input instanceof \Iterator) { $this->input->next(); } else { $this->input = null; } } } } // no input to read on resource, buffer is empty if (!isset($this->inputBuffer[0]) && !($this->input instanceof \Iterator ? $this->input->valid() : $this->input)) { $this->input = null; fclose($this->pipes[0]); unset($this->pipes[0]); } elseif (!$w) { return [$this->pipes[0]]; } return null; } /* * @internal */ public function handleError($type, $msg) { $this->lastError = $msg; } } Back

Edit File : AbstractPipes.php | Size : 4.88 KB

<?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\InvalidArgumentException;

/**
 * @author Romain Neutron <imprec@gmail.com>
 *
 * @internal
 */
abstract class AbstractPipes implements PipesInterface
{
    public $pipes = [];

private $inputBuffer = '';
    private $input;
    private $blocked = true;
    private $lastError;

/**
     * @param resource|string|int|float|bool|\Iterator|null $input
     */
    public function __construct($input)
    {
        if (\is_resource($input) || $input instanceof \Iterator) {
            $this->input = $input;
        } elseif (\is_string($input)) {
            $this->inputBuffer = $input;
        } else {
            $this->inputBuffer = (string) $input;
        }
    }

/**
     * {@inheritdoc}
     */
    public function close()
    {
        foreach ($this->pipes as $pipe) {
            fclose($pipe);
        }
        $this->pipes = [];
    }

/**
     * Returns true if a system call has been interrupted.
     */
    protected function hasSystemCallBeenInterrupted(): bool
    {
        $lastError = $this->lastError;
        $this->lastError = null;

// stream_select returns false when the `select` system call is interrupted by an incoming signal
        return null !== $lastError && false !== stripos($lastError, 'interrupted system call');
    }

/**
     * Unblocks streams.
     */
    protected function unblock()
    {
        if (!$this->blocked) {
            return;
        }

foreach ($this->pipes as $pipe) {
            stream_set_blocking($pipe, 0);
        }
        if (\is_resource($this->input)) {
            stream_set_blocking($this->input, 0);
        }

$this->blocked = false;
    }

/**
     * Writes input to stdin.
     *
     * @throws InvalidArgumentException When an input iterator yields a non supported value
     */
    protected function write(): ?array
    {
        if (!isset($this->pipes[0])) {
            return null;
        }
        $input = $this->input;

if ($input instanceof \Iterator) {
            if (!$input->valid()) {
                $input = null;
            } elseif (\is_resource($input = $input->current())) {
                stream_set_blocking($input, 0);
            } elseif (!isset($this->inputBuffer[0])) {
                if (!\is_string($input)) {
                    if (!is_scalar($input)) {
                        throw new InvalidArgumentException(sprintf('"%s" yielded a value of type "%s", but only scalars and stream resources are supported.', \get_class($this->input), \gettype($input)));
                    }
                    $input = (string) $input;
                }
                $this->inputBuffer = $input;
                $this->input->next();
                $input = null;
            } else {
                $input = null;
            }
        }

$r = $e = [];
        $w = [$this->pipes[0]];

// let's have a look if something changed in streams
        if (false === @stream_select($r, $w, $e, 0, 0)) {
            return null;
        }

foreach ($w as $stdin) {
            if (isset($this->inputBuffer[0])) {
                $written = fwrite($stdin, $this->inputBuffer);
                $this->inputBuffer = substr($this->inputBuffer, $written);
                if (isset($this->inputBuffer[0])) {
                    return [$this->pipes[0]];
                }
            }

if ($input) {
                for (;;) {
                    $data = fread($input, self::CHUNK_SIZE);
                    if (!isset($data[0])) {
                        break;
                    }
                    $written = fwrite($stdin, $data);
                    $data = substr($data, $written);
                    if (isset($data[0])) {
                        $this->inputBuffer = $data;

return [$this->pipes[0]];
                    }
                }
                if (feof($input)) {
                    if ($this->input instanceof \Iterator) {
                        $this->input->next();
                    } else {
                        $this->input = null;
                    }
                }
            }
        }

// no input to read on resource, buffer is empty
        if (!isset($this->inputBuffer[0]) && !($this->input instanceof \Iterator ? $this->input->valid() : $this->input)) {
            $this->input = null;
            fclose($this->pipes[0]);
            unset($this->pipes[0]);
        } elseif (!$w) {
            return [$this->pipes[0]];
        }

return null;
    }

/**
     * @internal
     */
    public function handleError($type, $msg)
    {
        $this->lastError = $msg;
    }
}

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