Update to MediaWiki 1.26.0

1 files changed, 1526 insertions, 0 deletions

diff --git a/vendor/symfony/process/Process.php b/vendor/symfony/process/Process.php
new file mode 100644
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+++ b/vendor/symfony/process/Process.php
@@ -0,0 +1,1526 @@
+<?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;
+
+use Symfony\Component\Process\Exception\InvalidArgumentException;
+use Symfony\Component\Process\Exception\LogicException;
+use Symfony\Component\Process\Exception\ProcessFailedException;
+use Symfony\Component\Process\Exception\ProcessTimedOutException;
+use Symfony\Component\Process\Exception\RuntimeException;
+use Symfony\Component\Process\Pipes\PipesInterface;
+use Symfony\Component\Process\Pipes\UnixPipes;
+use Symfony\Component\Process\Pipes\WindowsPipes;
+
+/**
+ * Process is a thin wrapper around proc_* functions to easily
+ * start independent PHP processes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Romain Neutron <imprec@gmail.com>
+ *
+ * @api
+ */
+class Process
+{
+    const ERR = 'err';
+    const OUT = 'out';
+
+    const STATUS_READY = 'ready';
+    const STATUS_STARTED = 'started';
+    const STATUS_TERMINATED = 'terminated';
+
+    const STDIN = 0;
+    const STDOUT = 1;
+    const STDERR = 2;
+
+    // Timeout Precision in seconds.
+    const TIMEOUT_PRECISION = 0.2;
+
+    private $callback;
+    private $commandline;
+    private $cwd;
+    private $env;
+    private $input;
+    private $starttime;
+    private $lastOutputTime;
+    private $timeout;
+    private $idleTimeout;
+    private $options;
+    private $exitcode;
+    private $fallbackExitcode;
+    private $processInformation;
+    private $outputDisabled = false;
+    private $stdout;
+    private $stderr;
+    private $enhanceWindowsCompatibility = true;
+    private $enhanceSigchildCompatibility;
+    private $process;
+    private $status = self::STATUS_READY;
+    private $incrementalOutputOffset = 0;
+    private $incrementalErrorOutputOffset = 0;
+    private $tty;
+    private $pty;
+
+    private $useFileHandles = false;
+    /** @var PipesInterface */
+    private $processPipes;
+
+    private $latestSignal;
+
+    private static $sigchild;
+
+    /**
+     * Exit codes translation table.
+     *
+     * User-defined errors must use exit codes in the 64-113 range.
+     *
+     * @var array
+     */
+    public static $exitCodes = array(
+        0 => 'OK',
+        1 => 'General error',
+        2 => 'Misuse of shell builtins',
+
+        126 => 'Invoked command cannot execute',
+        127 => 'Command not found',
+        128 => 'Invalid exit argument',
+
+        // signals
+        129 => 'Hangup',
+        130 => 'Interrupt',
+        131 => 'Quit and dump core',
+        132 => 'Illegal instruction',
+        133 => 'Trace/breakpoint trap',
+        134 => 'Process aborted',
+        135 => 'Bus error: "access to undefined portion of memory object"',
+        136 => 'Floating point exception: "erroneous arithmetic operation"',
+        137 => 'Kill (terminate immediately)',
+        138 => 'User-defined 1',
+        139 => 'Segmentation violation',
+        140 => 'User-defined 2',
+        141 => 'Write to pipe with no one reading',
+        142 => 'Signal raised by alarm',
+        143 => 'Termination (request to terminate)',
+        // 144 - not defined
+        145 => 'Child process terminated, stopped (or continued*)',
+        146 => 'Continue if stopped',
+        147 => 'Stop executing temporarily',
+        148 => 'Terminal stop signal',
+        149 => 'Background process attempting to read from tty ("in")',
+        150 => 'Background process attempting to write to tty ("out")',
+        151 => 'Urgent data available on socket',
+        152 => 'CPU time limit exceeded',
+        153 => 'File size limit exceeded',
+        154 => 'Signal raised by timer counting virtual time: "virtual timer expired"',
+        155 => 'Profiling timer expired',
+        // 156 - not defined
+        157 => 'Pollable event',
+        // 158 - not defined
+        159 => 'Bad syscall',
+    );
+
+    /**
+     * Constructor.
+     *
+     * @param string         $commandline The command line to run
+     * @param string|null    $cwd         The working directory or null to use the working dir of the current PHP process
+     * @param array|null     $env         The environment variables or null to inherit
+     * @param string|null    $input       The input
+     * @param int|float|null $timeout     The timeout in seconds or null to disable
+     * @param array          $options     An array of options for proc_open
+     *
+     * @throws RuntimeException When proc_open is not installed
+     *
+     * @api
+     */
+    public function __construct($commandline, $cwd = null, array $env = null, $input = null, $timeout = 60, array $options = array())
+    {
+        if (!function_exists('proc_open')) {
+            throw new RuntimeException('The Process class relies on proc_open, which is not available on your PHP installation.');
+        }
+
+        $this->commandline = $commandline;
+        $this->cwd = $cwd;
+
+        // on Windows, if the cwd changed via chdir(), proc_open defaults to the dir where PHP was started
+        // on Gnu/Linux, PHP builds with --enable-maintainer-zts are also affected
+        // @see : https://bugs.php.net/bug.php?id=51800
+        // @see : https://bugs.php.net/bug.php?id=50524
+        if (null === $this->cwd && (defined('ZEND_THREAD_SAFE') || '\\' === DIRECTORY_SEPARATOR)) {
+            $this->cwd = getcwd();
+        }
+        if (null !== $env) {
+            $this->setEnv($env);
+        }
+
+        $this->input = $input;
+        $this->setTimeout($timeout);
+        $this->useFileHandles = '\\' === DIRECTORY_SEPARATOR;
+        $this->pty = false;
+        $this->enhanceWindowsCompatibility = true;
+        $this->enhanceSigchildCompatibility = '\\' !== DIRECTORY_SEPARATOR && $this->isSigchildEnabled();
+        $this->options = array_replace(array('suppress_errors' => true, 'binary_pipes' => true), $options);
+    }
+
+    public function __destruct()
+    {
+        // stop() will check if we have a process running.
+        $this->stop();
+    }
+
+    public function __clone()
+    {
+        $this->resetProcessData();
+    }
+
+    /**
+     * Runs the process.
+     *
+     * The callback receives the type of output (out or err) and
+     * some bytes from the output in real-time. It allows to have feedback
+     * from the independent process during execution.
+     *
+     * The STDOUT and STDERR are also available after the process is finished
+     * via the getOutput() and getErrorOutput() methods.
+     *
+     * @param callable|null $callback A PHP callback to run whenever there is some
+     *                                output available on STDOUT or STDERR
+     *
+     * @return int The exit status code
+     *
+     * @throws RuntimeException When process can't be launched
+     * @throws RuntimeException When process stopped after receiving signal
+     * @throws LogicException   In case a callback is provided and output has been disabled
+     *
+     * @api
+     */
+    public function run($callback = null)
+    {
+        $this->start($callback);
+
+        return $this->wait();
+    }
+
+    /**
+     * Runs the process.
+     *
+     * This is identical to run() except that an exception is thrown if the process
+     * exits with a non-zero exit code.
+     *
+     * @param callable|null $callback
+     *
+     * @return self
+     *
+     * @throws RuntimeException       if PHP was compiled with --enable-sigchild and the enhanced sigchild compatibility mode is not enabled
+     * @throws ProcessFailedException if the process didn't terminate successfully
+     */
+    public function mustRun($callback = null)
+    {
+        if ($this->isSigchildEnabled() && !$this->enhanceSigchildCompatibility) {
+            throw new RuntimeException('This PHP has been compiled with --enable-sigchild. You must use setEnhanceSigchildCompatibility() to use this method.');
+        }
+
+        if (0 !== $this->run($callback)) {
+            throw new ProcessFailedException($this);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Starts the process and returns after writing the input to STDIN.
+     *
+     * This method blocks until all STDIN data is sent to the process then it
+     * returns while the process runs in the background.
+     *
+     * The termination of the process can be awaited with wait().
+     *
+     * The callback receives the type of output (out or err) and some bytes from
+     * the output in real-time while writing the standard input to the process.
+     * It allows to have feedback from the independent process during execution.
+     * If there is no callback passed, the wait() method can be called
+     * with true as a second parameter then the callback will get all data occurred
+     * in (and since) the start call.
+     *
+     * @param callable|null $callback A PHP callback to run whenever there is some
+     *                                output available on STDOUT or STDERR
+     *
+     * @throws RuntimeException When process can't be launched
+     * @throws RuntimeException When process is already running
+     * @throws LogicException   In case a callback is provided and output has been disabled
+     */
+    public function start($callback = null)
+    {
+        if ($this->isRunning()) {
+            throw new RuntimeException('Process is already running');
+        }
+        if ($this->outputDisabled && null !== $callback) {
+            throw new LogicException('Output has been disabled, enable it to allow the use of a callback.');
+        }
+
+        $this->resetProcessData();
+        $this->starttime = $this->lastOutputTime = microtime(true);
+        $this->callback = $this->buildCallback($callback);
+        $descriptors = $this->getDescriptors();
+
+        $commandline = $this->commandline;
+
+        if ('\\' === DIRECTORY_SEPARATOR && $this->enhanceWindowsCompatibility) {
+            $commandline = 'cmd /V:ON /E:ON /C "('.$commandline.')';
+            foreach ($this->processPipes->getFiles() as $offset => $filename) {
+                $commandline .= ' '.$offset.'>'.ProcessUtils::escapeArgument($filename);
+            }
+            $commandline .= '"';
+
+            if (!isset($this->options['bypass_shell'])) {
+                $this->options['bypass_shell'] = true;
+            }
+        }
+
+        $this->process = proc_open($commandline, $descriptors, $this->processPipes->pipes, $this->cwd, $this->env, $this->options);
+
+        if (!is_resource($this->process)) {
+            throw new RuntimeException('Unable to launch a new process.');
+        }
+        $this->status = self::STATUS_STARTED;
+
+        if ($this->tty) {
+            return;
+        }
+
+        $this->updateStatus(false);
+        $this->checkTimeout();
+    }
+
+    /**
+     * Restarts the process.
+     *
+     * Be warned that the process is cloned before being started.
+     *
+     * @param callable|null $callback A PHP callback to run whenever there is some
+     *                                output available on STDOUT or STDERR
+     *
+     * @return Process The new process
+     *
+     * @throws RuntimeException When process can't be launched
+     * @throws RuntimeException When process is already running
+     *
+     * @see start()
+     */
+    public function restart($callback = null)
+    {
+        if ($this->isRunning()) {
+            throw new RuntimeException('Process is already running');
+        }
+
+        $process = clone $this;
+        $process->start($callback);
+
+        return $process;
+    }
+
+    /**
+     * Waits for the process to terminate.
+     *
+     * The callback receives the type of output (out or err) and some bytes
+     * from the output in real-time while writing the standard input to the process.
+     * It allows to have feedback from the independent process during execution.
+     *
+     * @param callable|null $callback A valid PHP callback
+     *
+     * @return int The exitcode of the process
+     *
+     * @throws RuntimeException When process timed out
+     * @throws RuntimeException When process stopped after receiving signal
+     * @throws LogicException   When process is not yet started
+     */
+    public function wait($callback = null)
+    {
+        $this->requireProcessIsStarted(__FUNCTION__);
+
+        $this->updateStatus(false);
+        if (null !== $callback) {
+            $this->callback = $this->buildCallback($callback);
+        }
+
+        do {
+            $this->checkTimeout();
+            $running = '\\' === DIRECTORY_SEPARATOR ? $this->isRunning() : $this->processPipes->areOpen();
+            $close = '\\' !== DIRECTORY_SEPARATOR || !$running;
+            $this->readPipes(true, $close);
+        } while ($running);
+
+        while ($this->isRunning()) {
+            usleep(1000);
+        }
+
+        if ($this->processInformation['signaled'] && $this->processInformation['termsig'] !== $this->latestSignal) {
+            throw new RuntimeException(sprintf('The process has been signaled with signal "%s".', $this->processInformation['termsig']));
+        }
+
+        return $this->exitcode;
+    }
+
+    /**
+     * Returns the Pid (process identifier), if applicable.
+     *
+     * @return int|null The process id if running, null otherwise
+     *
+     * @throws RuntimeException In case --enable-sigchild is activated
+     */
+    public function getPid()
+    {
+        if ($this->isSigchildEnabled()) {
+            throw new RuntimeException('This PHP has been compiled with --enable-sigchild. The process identifier can not be retrieved.');
+        }
+
+        $this->updateStatus(false);
+
+        return $this->isRunning() ? $this->processInformation['pid'] : null;
+    }
+
+    /**
+     * Sends a POSIX signal to the process.
+     *
+     * @param int $signal A valid POSIX signal (see http://www.php.net/manual/en/pcntl.constants.php)
+     *
+     * @return Process
+     *
+     * @throws LogicException   In case the process is not running
+     * @throws RuntimeException In case --enable-sigchild is activated
+     * @throws RuntimeException In case of failure
+     */
+    public function signal($signal)
+    {
+        $this->doSignal($signal, true);
+
+        return $this;
+    }
+
+    /**
+     * Disables fetching output and error output from the underlying process.
+     *
+     * @return Process
+     *
+     * @throws RuntimeException In case the process is already running
+     * @throws LogicException   if an idle timeout is set
+     */
+    public function disableOutput()
+    {
+        if ($this->isRunning()) {
+            throw new RuntimeException('Disabling output while the process is running is not possible.');
+        }
+        if (null !== $this->idleTimeout) {
+            throw new LogicException('Output can not be disabled while an idle timeout is set.');
+        }
+
+        $this->outputDisabled = true;
+
+        return $this;
+    }
+
+    /**
+     * Enables fetching output and error output from the underlying process.
+     *
+     * @return Process
+     *
+     * @throws RuntimeException In case the process is already running
+     */
+    public function enableOutput()
+    {
+        if ($this->isRunning()) {
+            throw new RuntimeException('Enabling output while the process is running is not possible.');
+        }
+
+        $this->outputDisabled = false;
+
+        return $this;
+    }
+
+    /**
+     * Returns true in case the output is disabled, false otherwise.
+     *
+     * @return bool
+     */
+    public function isOutputDisabled()
+    {
+        return $this->outputDisabled;
+    }
+
+    /**
+     * Returns the current output of the process (STDOUT).
+     *
+     * @return string The process output
+     *
+     * @throws LogicException in case the output has been disabled
+     * @throws LogicException In case the process is not started
+     *
+     * @api
+     */
+    public function getOutput()
+    {
+        if ($this->outputDisabled) {
+            throw new LogicException('Output has been disabled.');
+        }
+
+        $this->requireProcessIsStarted(__FUNCTION__);
+
+        $this->readPipes(false, '\\' === DIRECTORY_SEPARATOR ? !$this->processInformation['running'] : true);
+
+        return $this->stdout;
+    }
+
+    /**
+     * Returns the output incrementally.
+     *
+     * In comparison with the getOutput method which always return the whole
+     * output, this one returns the new output since the last call.
+     *
+     * @throws LogicException in case the output has been disabled
+     * @throws LogicException In case the process is not started
+     *
+     * @return string The process output since the last call
+     */
+    public function getIncrementalOutput()
+    {
+        $this->requireProcessIsStarted(__FUNCTION__);
+
+        $data = $this->getOutput();
+
+        $latest = substr($data, $this->incrementalOutputOffset);
+
+        if (false === $latest) {
+            return '';
+        }
+
+        $this->incrementalOutputOffset = strlen($data);
+
+        return $latest;
+    }
+
+    /**
+     * Clears the process output.
+     *
+     * @return Process
+     */
+    public function clearOutput()
+    {
+        $this->stdout = '';
+        $this->incrementalOutputOffset = 0;
+
+        return $this;
+    }
+
+    /**
+     * Returns the current error output of the process (STDERR).
+     *
+     * @return string The process error output
+     *
+     * @throws LogicException in case the output has been disabled
+     * @throws LogicException In case the process is not started
+     *
+     * @api
+     */
+    public function getErrorOutput()
+    {
+        if ($this->outputDisabled) {
+            throw new LogicException('Output has been disabled.');
+        }
+
+        $this->requireProcessIsStarted(__FUNCTION__);
+
+        $this->readPipes(false, '\\' === DIRECTORY_SEPARATOR ? !$this->processInformation['running'] : true);
+
+        return $this->stderr;
+    }
+
+    /**
+     * Returns the errorOutput incrementally.
+     *
+     * In comparison with the getErrorOutput method which always return the
+     * whole error output, this one returns the new error output since the last
+     * call.
+     *
+     * @throws LogicException in case the output has been disabled
+     * @throws LogicException In case the process is not started
+     *
+     * @return string The process error output since the last call
+     */
+    public function getIncrementalErrorOutput()
+    {
+        $this->requireProcessIsStarted(__FUNCTION__);
+
+        $data = $this->getErrorOutput();
+
+        $latest = substr($data, $this->incrementalErrorOutputOffset);
+
+        if (false === $latest) {
+            return '';
+        }
+
+        $this->incrementalErrorOutputOffset = strlen($data);
+
+        return $latest;
+    }
+
+    /**
+     * Clears the process output.
+     *
+     * @return Process
+     */
+    public function clearErrorOutput()
+    {
+        $this->stderr = '';
+        $this->incrementalErrorOutputOffset = 0;
+
+        return $this;
+    }
+
+    /**
+     * Returns the exit code returned by the process.
+     *
+     * @return null|int The exit status code, null if the Process is not terminated
+     *
+     * @throws RuntimeException In case --enable-sigchild is activated and the sigchild compatibility mode is disabled
+     *
+     * @api
+     */
+    public function getExitCode()
+    {
+        if ($this->isSigchildEnabled() && !$this->enhanceSigchildCompatibility) {
+            throw new RuntimeException('This PHP has been compiled with --enable-sigchild. You must use setEnhanceSigchildCompatibility() to use this method.');
+        }
+
+        $this->updateStatus(false);
+
+        return $this->exitcode;
+    }
+
+    /**
+     * Returns a string representation for the exit code returned by the process.
+     *
+     * This method relies on the Unix exit code status standardization
+     * and might not be relevant for other operating systems.
+     *
+     * @return null|string A string representation for the exit status code, null if the Process is not terminated.
+     *
+     * @throws RuntimeException In case --enable-sigchild is activated and the sigchild compatibility mode is disabled
+     *
+     * @see http://tldp.org/LDP/abs/html/exitcodes.html
+     * @see http://en.wikipedia.org/wiki/Unix_signal
+     */
+    public function getExitCodeText()
+    {
+        if (null === $exitcode = $this->getExitCode()) {
+            return;
+        }
+
+        return isset(self::$exitCodes[$exitcode]) ? self::$exitCodes[$exitcode] : 'Unknown error';
+    }
+
+    /**
+     * Checks if the process ended successfully.
+     *
+     * @return bool true if the process ended successfully, false otherwise
+     *
+     * @api
+     */
+    public function isSuccessful()
+    {
+        return 0 === $this->getExitCode();
+    }
+
+    /**
+     * Returns true if the child process has been terminated by an uncaught signal.
+     *
+     * It always returns false on Windows.
+     *
+     * @return bool
+     *
+     * @throws RuntimeException In case --enable-sigchild is activated
+     * @throws LogicException   In case the process is not terminated
+     *
+     * @api
+     */
+    public function hasBeenSignaled()
+    {
+        $this->requireProcessIsTerminated(__FUNCTION__);
+
+        if ($this->isSigchildEnabled()) {
+            throw new RuntimeException('This PHP has been compiled with --enable-sigchild. Term signal can not be retrieved.');
+        }
+
+        $this->updateStatus(false);
+
+        return $this->processInformation['signaled'];
+    }
+
+    /**
+     * Returns the number of the signal that caused the child process to terminate its execution.
+     *
+     * It is only meaningful if hasBeenSignaled() returns true.
+     *
+     * @return int
+     *
+     * @throws RuntimeException In case --enable-sigchild is activated
+     * @throws LogicException   In case the process is not terminated
+     *
+     * @api
+     */
+    public function getTermSignal()
+    {
+        $this->requireProcessIsTerminated(__FUNCTION__);
+
+        if ($this->isSigchildEnabled()) {
+            throw new RuntimeException('This PHP has been compiled with --enable-sigchild. Term signal can not be retrieved.');
+        }
+
+        $this->updateStatus(false);
+
+        return $this->processInformation['termsig'];
+    }
+
+    /**
+     * Returns true if the child process has been stopped by a signal.
+     *
+     * It always returns false on Windows.
+     *
+     * @return bool
+     *
+     * @throws LogicException In case the process is not terminated
+     *
+     * @api
+     */
+    public function hasBeenStopped()
+    {
+        $this->requireProcessIsTerminated(__FUNCTION__);
+
+        $this->updateStatus(false);
+
+        return $this->processInformation['stopped'];
+    }
+
+    /**
+     * Returns the number of the signal that caused the child process to stop its execution.
+     *
+     * It is only meaningful if hasBeenStopped() returns true.
+     *
+     * @return int
+     *
+     * @throws LogicException In case the process is not terminated
+     *
+     * @api
+     */
+    public function getStopSignal()
+    {
+        $this->requireProcessIsTerminated(__FUNCTION__);
+
+        $this->updateStatus(false);
+
+        return $this->processInformation['stopsig'];
+    }
+
+    /**
+     * Checks if the process is currently running.
+     *
+     * @return bool true if the process is currently running, false otherwise
+     */
+    public function isRunning()
+    {
+        if (self::STATUS_STARTED !== $this->status) {
+            return false;
+        }
+
+        $this->updateStatus(false);
+
+        return $this->processInformation['running'];
+    }
+
+    /**
+     * Checks if the process has been started with no regard to the current state.
+     *
+     * @return bool true if status is ready, false otherwise
+     */
+    public function isStarted()
+    {
+        return $this->status != self::STATUS_READY;
+    }
+
+    /**
+     * Checks if the process is terminated.
+     *
+     * @return bool true if process is terminated, false otherwise
+     */
+    public function isTerminated()
+    {
+        $this->updateStatus(false);
+
+        return $this->status == self::STATUS_TERMINATED;
+    }
+
+    /**
+     * Gets the process status.
+     *
+     * The status is one of: ready, started, terminated.
+     *
+     * @return string The current process status
+     */
+    public function getStatus()
+    {
+        $this->updateStatus(false);
+
+        return $this->status;
+    }
+
+    /**
+     * Stops the process.
+     *
+     * @param int|float $timeout The timeout in seconds
+     * @param int       $signal  A POSIX signal to send in case the process has not stop at timeout, default is SIGKILL
+     *
+     * @return int The exit-code of the process
+     *
+     * @throws RuntimeException if the process got signaled
+     */
+    public function stop($timeout = 10, $signal = null)
+    {
+        $timeoutMicro = microtime(true) + $timeout;
+        if ($this->isRunning()) {
+            if ('\\' === DIRECTORY_SEPARATOR && !$this->isSigchildEnabled()) {
+                exec(sprintf('taskkill /F /T /PID %d 2>&1', $this->getPid()), $output, $exitCode);
+                if ($exitCode > 0) {
+                    throw new RuntimeException('Unable to kill the process');
+                }
+            }
+            // given `SIGTERM` may not be defined and that `proc_terminate` uses the constant value and not the constant itself, we use the same here
+            $this->doSignal(15, false);
+            do {
+                usleep(1000);
+            } while ($this->isRunning() && microtime(true) < $timeoutMicro);
+
+            if ($this->isRunning() && !$this->isSigchildEnabled()) {
+                if (null !== $signal || defined('SIGKILL')) {
+                    // avoid exception here :
+                    // process is supposed to be running, but it might have stop
+                    // just after this line.
+                    // in any case, let's silently discard the error, we can not do anything
+                    $this->doSignal($signal ?: SIGKILL, false);
+                }
+            }
+        }
+
+        $this->updateStatus(false);
+        if ($this->processInformation['running']) {
+            $this->close();
+        }
+
+        return $this->exitcode;
+    }
+
+    /**
+     * Adds a line to the STDOUT stream.
+     *
+     * @param string $line The line to append
+     */
+    public function addOutput($line)
+    {
+        $this->lastOutputTime = microtime(true);
+        $this->stdout .= $line;
+    }
+
+    /**
+     * Adds a line to the STDERR stream.
+     *
+     * @param string $line The line to append
+     */
+    public function addErrorOutput($line)
+    {
+        $this->lastOutputTime = microtime(true);
+        $this->stderr .= $line;
+    }
+
+    /**
+     * Gets the command line to be executed.
+     *
+     * @return string The command to execute
+     */
+    public function getCommandLine()
+    {
+        return $this->commandline;
+    }
+
+    /**
+     * Sets the command line to be executed.
+     *
+     * @param string $commandline The command to execute
+     *
+     * @return self The current Process instance
+     */
+    public function setCommandLine($commandline)
+    {
+        $this->commandline = $commandline;
+
+        return $this;
+    }
+
+    /**
+     * Gets the process timeout (max. runtime).
+     *
+     * @return float|null The timeout in seconds or null if it's disabled
+     */
+    public function getTimeout()
+    {
+        return $this->timeout;
+    }
+
+    /**
+     * Gets the process idle timeout (max. time since last output).
+     *
+     * @return float|null The timeout in seconds or null if it's disabled
+     */
+    public function getIdleTimeout()
+    {
+        return $this->idleTimeout;
+    }
+
+    /**
+     * Sets the process timeout (max. runtime).
+     *
+     * To disable the timeout, set this value to null.
+     *
+     * @param int|float|null $timeout The timeout in seconds
+     *
+     * @return self The current Process instance
+     *
+     * @throws InvalidArgumentException if the timeout is negative
+     */
+    public function setTimeout($timeout)
+    {
+        $this->timeout = $this->validateTimeout($timeout);
+
+        return $this;
+    }
+
+    /**
+     * Sets the process idle timeout (max. time since last output).
+     *
+     * To disable the timeout, set this value to null.
+     *
+     * @param int|float|null $timeout The timeout in seconds
+     *
+     * @return self The current Process instance.
+     *
+     * @throws LogicException           if the output is disabled
+     * @throws InvalidArgumentException if the timeout is negative
+     */
+    public function setIdleTimeout($timeout)
+    {
+        if (null !== $timeout && $this->outputDisabled) {
+            throw new LogicException('Idle timeout can not be set while the output is disabled.');
+        }
+
+        $this->idleTimeout = $this->validateTimeout($timeout);
+
+        return $this;
+    }
+
+    /**
+     * Enables or disables the TTY mode.
+     *
+     * @param bool $tty True to enabled and false to disable
+     *
+     * @return self The current Process instance
+     *
+     * @throws RuntimeException In case the TTY mode is not supported
+     */
+    public function setTty($tty)
+    {
+        if ('\\' === DIRECTORY_SEPARATOR && $tty) {
+            throw new RuntimeException('TTY mode is not supported on Windows platform.');
+        }
+        if ($tty && (!file_exists('/dev/tty') || !is_readable('/dev/tty'))) {
+            throw new RuntimeException('TTY mode requires /dev/tty to be readable.');
+        }
+
+        $this->tty = (bool) $tty;
+
+        return $this;
+    }
+
+    /**
+     * Checks if the TTY mode is enabled.
+     *
+     * @return bool true if the TTY mode is enabled, false otherwise
+     */
+    public function isTty()
+    {
+        return $this->tty;
+    }
+
+    /**
+     * Sets PTY mode.
+     *
+     * @param bool $bool
+     *
+     * @return self
+     */
+    public function setPty($bool)
+    {
+        $this->pty = (bool) $bool;
+
+        return $this;
+    }
+
+    /**
+     * Returns PTY state.
+     *
+     * @return bool
+     */
+    public function isPty()
+    {
+        return $this->pty;
+    }
+
+    /**
+     * Gets the working directory.
+     *
+     * @return string|null The current working directory or null on failure
+     */
+    public function getWorkingDirectory()
+    {
+        if (null === $this->cwd) {
+            // getcwd() will return false if any one of the parent directories does not have
+            // the readable or search mode set, even if the current directory does
+            return getcwd() ?: null;
+        }
+
+        return $this->cwd;
+    }
+
+    /**
+     * Sets the current working directory.
+     *
+     * @param string $cwd The new working directory
+     *
+     * @return self The current Process instance
+     */
+    public function setWorkingDirectory($cwd)
+    {
+        $this->cwd = $cwd;
+
+        return $this;
+    }
+
+    /**
+     * Gets the environment variables.
+     *
+     * @return array The current environment variables
+     */
+    public function getEnv()
+    {
+        return $this->env;
+    }
+
+    /**
+     * Sets the environment variables.
+     *
+     * An environment variable value should be a string.
+     * If it is an array, the variable is ignored.
+     *
+     * That happens in PHP when 'argv' is registered into
+     * the $_ENV array for instance.
+     *
+     * @param array $env The new environment variables
+     *
+     * @return self The current Process instance
+     */
+    public function setEnv(array $env)
+    {
+        // Process can not handle env values that are arrays
+        $env = array_filter($env, function ($value) {
+            return !is_array($value);
+        });
+
+        $this->env = array();
+        foreach ($env as $key => $value) {
+            $this->env[(binary) $key] = (binary) $value;
+        }
+
+        return $this;
+    }
+
+    /**
+     * Gets the contents of STDIN.
+     *
+     * @return string|null The current contents
+     *
+     * @deprecated since version 2.5, to be removed in 3.0.
+     *             Use setInput() instead.
+     *             This method is deprecated in favor of getInput.
+     */
+    public function getStdin()
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since version 2.5 and will be removed in 3.0. Use the getInput() method instead.', E_USER_DEPRECATED);
+
+        return $this->getInput();
+    }
+
+    /**
+     * Gets the Process input.
+     *
+     * @return null|string The Process input
+     */
+    public function getInput()
+    {
+        return $this->input;
+    }
+
+    /**
+     * Sets the contents of STDIN.
+     *
+     * @param string|null $stdin The new contents
+     *
+     * @return self The current Process instance
+     *
+     * @deprecated since version 2.5, to be removed in 3.0.
+     *             Use setInput() instead.
+     *
+     * @throws LogicException           In case the process is running
+     * @throws InvalidArgumentException In case the argument is invalid
+     */
+    public function setStdin($stdin)
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since version 2.5 and will be removed in 3.0. Use the setInput() method instead.', E_USER_DEPRECATED);
+
+        return $this->setInput($stdin);
+    }
+
+    /**
+     * Sets the input.
+     *
+     * This content will be passed to the underlying process standard input.
+     *
+     * @param mixed $input The content
+     *
+     * @return self The current Process instance
+     *
+     * @throws LogicException In case the process is running
+     *
+     * Passing an object as an input is deprecated since version 2.5 and will be removed in 3.0.
+     */
+    public function setInput($input)
+    {
+        if ($this->isRunning()) {
+            throw new LogicException('Input can not be set while the process is running.');
+        }
+
+        $this->input = ProcessUtils::validateInput(sprintf('%s::%s', __CLASS__, __FUNCTION__), $input);
+
+        return $this;
+    }
+
+    /**
+     * Gets the options for proc_open.
+     *
+     * @return array The current options
+     */
+    public function getOptions()
+    {
+        return $this->options;
+    }
+
+    /**
+     * Sets the options for proc_open.
+     *
+     * @param array $options The new options
+     *
+     * @return self The current Process instance
+     */
+    public function setOptions(array $options)
+    {
+        $this->options = $options;
+
+        return $this;
+    }
+
+    /**
+     * Gets whether or not Windows compatibility is enabled.
+     *
+     * This is true by default.
+     *
+     * @return bool
+     */
+    public function getEnhanceWindowsCompatibility()
+    {
+        return $this->enhanceWindowsCompatibility;
+    }
+
+    /**
+     * Sets whether or not Windows compatibility is enabled.
+     *
+     * @param bool $enhance
+     *
+     * @return self The current Process instance
+     */
+    public function setEnhanceWindowsCompatibility($enhance)
+    {
+        $this->enhanceWindowsCompatibility = (bool) $enhance;
+
+        return $this;
+    }
+
+    /**
+     * Returns whether sigchild compatibility mode is activated or not.
+     *
+     * @return bool
+     */
+    public function getEnhanceSigchildCompatibility()
+    {
+        return $this->enhanceSigchildCompatibility;
+    }
+
+    /**
+     * Activates sigchild compatibility mode.
+     *
+     * Sigchild compatibility mode is required to get the exit code and
+     * determine the success of a process when PHP has been compiled with
+     * the --enable-sigchild option
+     *
+     * @param bool $enhance
+     *
+     * @return self The current Process instance
+     */
+    public function setEnhanceSigchildCompatibility($enhance)
+    {
+        $this->enhanceSigchildCompatibility = (bool) $enhance;
+
+        return $this;
+    }
+
+    /**
+     * Performs a check between the timeout definition and the time the process started.
+     *
+     * In case you run a background process (with the start method), you should
+     * trigger this method regularly to ensure the process timeout
+     *
+     * @throws ProcessTimedOutException In case the timeout was reached
+     */
+    public function checkTimeout()
+    {
+        if ($this->status !== self::STATUS_STARTED) {
+            return;
+        }
+
+        if (null !== $this->timeout && $this->timeout < microtime(true) - $this->starttime) {
+            $this->stop(0);
+
+            throw new ProcessTimedOutException($this, ProcessTimedOutException::TYPE_GENERAL);
+        }
+
+        if (null !== $this->idleTimeout && $this->idleTimeout < microtime(true) - $this->lastOutputTime) {
+            $this->stop(0);
+
+            throw new ProcessTimedOutException($this, ProcessTimedOutException::TYPE_IDLE);
+        }
+    }
+
+    /**
+     * Returns whether PTY is supported on the current operating system.
+     *
+     * @return bool
+     */
+    public static function isPtySupported()
+    {
+        static $result;
+
+        if (null !== $result) {
+            return $result;
+        }
+
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            return $result = false;
+        }
+
+        $proc = @proc_open('echo 1', array(array('pty'), array('pty'), array('pty')), $pipes);
+        if (is_resource($proc)) {
+            proc_close($proc);
+
+            return $result = true;
+        }
+
+        return $result = false;
+    }
+
+    /**
+     * Creates the descriptors needed by the proc_open.
+     *
+     * @return array
+     */
+    private function getDescriptors()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->processPipes = WindowsPipes::create($this, $this->input);
+        } else {
+            $this->processPipes = UnixPipes::create($this, $this->input);
+        }
+        $descriptors = $this->processPipes->getDescriptors($this->outputDisabled);
+
+        if (!$this->useFileHandles && $this->enhanceSigchildCompatibility && $this->isSigchildEnabled()) {
+            // last exit code is output on the fourth pipe and caught to work around --enable-sigchild
+            $descriptors = array_merge($descriptors, array(array('pipe', 'w')));
+
+            $this->commandline = '('.$this->commandline.') 3>/dev/null; code=$?; echo $code >&3; exit $code';
+        }
+
+        return $descriptors;
+    }
+
+    /**
+     * Builds up the callback used by wait().
+     *
+     * The callbacks adds all occurred output to the specific buffer and calls
+     * the user callback (if present) with the received output.
+     *
+     * @param callable|null $callback The user defined PHP callback
+     *
+     * @return callable A PHP callable
+     */
+    protected function buildCallback($callback)
+    {
+        $that = $this;
+        $out = self::OUT;
+        $callback = function ($type, $data) use ($that, $callback, $out) {
+            if ($out == $type) {
+                $that->addOutput($data);
+            } else {
+                $that->addErrorOutput($data);
+            }
+
+            if (null !== $callback) {
+                call_user_func($callback, $type, $data);
+            }
+        };
+
+        return $callback;
+    }
+
+    /**
+     * Updates the status of the process, reads pipes.
+     *
+     * @param bool $blocking Whether to use a blocking read call.
+     */
+    protected function updateStatus($blocking)
+    {
+        if (self::STATUS_STARTED !== $this->status) {
+            return;
+        }
+
+        $this->processInformation = proc_get_status($this->process);
+        $this->captureExitCode();
+
+        $this->readPipes($blocking, '\\' === DIRECTORY_SEPARATOR ? !$this->processInformation['running'] : true);
+
+        if (!$this->processInformation['running']) {
+            $this->close();
+        }
+    }
+
+    /**
+     * Returns whether PHP has been compiled with the '--enable-sigchild' option or not.
+     *
+     * @return bool
+     */
+    protected function isSigchildEnabled()
+    {
+        if (null !== self::$sigchild) {
+            return self::$sigchild;
+        }
+
+        if (!function_exists('phpinfo')) {
+            return self::$sigchild = false;
+        }
+
+        ob_start();
+        phpinfo(INFO_GENERAL);
+
+        return self::$sigchild = false !== strpos(ob_get_clean(), '--enable-sigchild');
+    }
+
+    /**
+     * Validates and returns the filtered timeout.
+     *
+     * @param int|float|null $timeout
+     *
+     * @return float|null
+     *
+     * @throws InvalidArgumentException if the given timeout is a negative number
+     */
+    private function validateTimeout($timeout)
+    {
+        $timeout = (float) $timeout;
+
+        if (0.0 === $timeout) {
+            $timeout = null;
+        } elseif ($timeout < 0) {
+            throw new InvalidArgumentException('The timeout value must be a valid positive integer or float number.');
+        }
+
+        return $timeout;
+    }
+
+    /**
+     * Reads pipes, executes callback.
+     *
+     * @param bool $blocking Whether to use blocking calls or not.
+     * @param bool $close    Whether to close file handles or not.
+     */
+    private function readPipes($blocking, $close)
+    {
+        $result = $this->processPipes->readAndWrite($blocking, $close);
+
+        $callback = $this->callback;
+        foreach ($result as $type => $data) {
+            if (3 == $type) {
+                $this->fallbackExitcode = (int) $data;
+            } else {
+                $callback($type === self::STDOUT ? self::OUT : self::ERR, $data);
+            }
+        }
+    }
+
+    /**
+     * Captures the exitcode if mentioned in the process information.
+     */
+    private function captureExitCode()
+    {
+        if (isset($this->processInformation['exitcode']) && -1 != $this->processInformation['exitcode']) {
+            $this->exitcode = $this->processInformation['exitcode'];
+        }
+    }
+
+    /**
+     * Closes process resource, closes file handles, sets the exitcode.
+     *
+     * @return int The exitcode
+     */
+    private function close()
+    {
+        $this->processPipes->close();
+        if (is_resource($this->process)) {
+            $exitcode = proc_close($this->process);
+        } else {
+            $exitcode = -1;
+        }
+
+        $this->exitcode = -1 !== $exitcode ? $exitcode : (null !== $this->exitcode ? $this->exitcode : -1);
+        $this->status = self::STATUS_TERMINATED;
+
+        if (-1 === $this->exitcode && null !== $this->fallbackExitcode) {
+            $this->exitcode = $this->fallbackExitcode;
+        } elseif (-1 === $this->exitcode && $this->processInformation['signaled'] && 0 < $this->processInformation['termsig']) {
+            // if process has been signaled, no exitcode but a valid termsig, apply Unix convention
+            $this->exitcode = 128 + $this->processInformation['termsig'];
+        }
+
+        return $this->exitcode;
+    }
+
+    /**
+     * Resets data related to the latest run of the process.
+     */
+    private function resetProcessData()
+    {
+        $this->starttime = null;
+        $this->callback = null;
+        $this->exitcode = null;
+        $this->fallbackExitcode = null;
+        $this->processInformation = null;
+        $this->stdout = null;
+        $this->stderr = null;
+        $this->process = null;
+        $this->latestSignal = null;
+        $this->status = self::STATUS_READY;
+        $this->incrementalOutputOffset = 0;
+        $this->incrementalErrorOutputOffset = 0;
+    }
+
+    /**
+     * Sends a POSIX signal to the process.
+     *
+     * @param int  $signal         A valid POSIX signal (see http://www.php.net/manual/en/pcntl.constants.php)
+     * @param bool $throwException Whether to throw exception in case signal failed
+     *
+     * @return bool True if the signal was sent successfully, false otherwise
+     *
+     * @throws LogicException   In case the process is not running
+     * @throws RuntimeException In case --enable-sigchild is activated
+     * @throws RuntimeException In case of failure
+     */
+    private function doSignal($signal, $throwException)
+    {
+        if (!$this->isRunning()) {
+            if ($throwException) {
+                throw new LogicException('Can not send signal on a non running process.');
+            }
+
+            return false;
+        }
+
+        if ($this->isSigchildEnabled()) {
+            if ($throwException) {
+                throw new RuntimeException('This PHP has been compiled with --enable-sigchild. The process can not be signaled.');
+            }
+
+            return false;
+        }
+
+        if (true !== @proc_terminate($this->process, $signal)) {
+            if ($throwException) {
+                throw new RuntimeException(sprintf('Error while sending signal `%s`.', $signal));
+            }
+
+            return false;
+        }
+
+        $this->latestSignal = $signal;
+
+        return true;
+    }
+
+    /**
+     * Ensures the process is running or terminated, throws a LogicException if the process has a not started.
+     *
+     * @param string $functionName The function name that was called.
+     *
+     * @throws LogicException If the process has not run.
+     */
+    private function requireProcessIsStarted($functionName)
+    {
+        if (!$this->isStarted()) {
+            throw new LogicException(sprintf('Process must be started before calling %s.', $functionName));
+        }
+    }
+
+    /**
+     * Ensures the process is terminated, throws a LogicException if the process has a status different than `terminated`.
+     *
+     * @param string $functionName The function name that was called.
+     *
+     * @throws LogicException If the process is not yet terminated.
+     */
+    private function requireProcessIsTerminated($functionName)
+    {
+        if (!$this->isTerminated()) {
+            throw new LogicException(sprintf('Process must be terminated before calling %s.', $functionName));
+        }
+    }
+}