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Directory >> /var/www/html/back/vendor/symfony/console/Helper/

File / Folder	Size	Action
.	-
DebugFormatterHelper.php	3.25KB	edt ren
DescriptorHelper.php	2.556KB	edt ren
Dumper.php	1.635KB	edt ren
FormatterHelper.php	2.186KB	edt ren
Helper.php	4.569KB	edt ren
HelperInterface.php	0.78KB	edt ren
HelperSet.php	1.794KB	edt ren
InputAwareHelper.php	0.714KB	edt ren
OutputWrapper.php	2.94KB	edt ren
ProcessHelper.php	4.716KB	edt ren
ProgressBar.php	20.356KB	edt ren
ProgressIndicator.php	7.484KB	edt ren
QuestionHelper.php	20.186KB	edt ren
SymfonyQuestionHelper.php	3.204KB	edt ren
Table.php	33.771KB	edt ren
TableCell.php	1.688KB	edt ren
TableCellStyle.php	2.169KB	edt ren
TableRows.php	0.523KB	edt ren
TableSeparator.php	0.519KB	edt ren
TableStyle.php	12.778KB	edt ren
TerminalInputHelper.php	4.363KB	edt ren
TreeHelper.php	2.842KB	edt ren
TreeNode.php	2.312KB	edt ren
TreeStyle.php	2.26KB	edt ren

<?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\Console\Helper;

/**
 * TerminalInputHelper stops Ctrl-C and similar signals from leaving the terminal in
 * an unusable state if its settings have been modified when reading user input.
 * This can be an issue on non-Windows platforms.
 *
 * Usage:
 *
 *     $inputHelper = new TerminalInputHelper($inputStream);
 *
 *     ...change terminal settings
 *
 *     // Wait for input before all input reads
 *     $inputHelper->waitForInput();
 *
 *     ...read input
 *
 *     // Call finish to restore terminal settings and signal handlers
 *     $inputHelper->finish()
 *
 * @internal
 */
final class TerminalInputHelper
{
    /** @var resource */
    private $inputStream;
    private bool $isStdin;
    private string $initialState = '';
    private int $signalToKill = 0;
    private array $signalHandlers = [];
    private array $targetSignals = [];
    private bool $withStty;

/**
     * @param resource $inputStream
     *
     * @throws \RuntimeException If unable to read terminal settings
     */
    public function __construct($inputStream, bool $withStty = true)
    {
        $this->inputStream = $inputStream;
        $this->isStdin = 'php://stdin' === stream_get_meta_data($inputStream)['uri'];
        $this->withStty = $withStty;

if ($withStty) {
            if (!\is_string($state = shell_exec('stty -g'))) {
                throw new \RuntimeException('Unable to read the terminal settings.');
            }

$this->initialState = $state;

$this->createSignalHandlers();
        }
    }

/**
     * Waits for input.
     */
    public function waitForInput(): void
    {
        if ($this->isStdin) {
            $r = [$this->inputStream];
            $w = [];

// Allow signal handlers to run
            while (0 === @stream_select($r, $w, $w, 0, 100)) {
                $r = [$this->inputStream];
            }
        }

if ($this->withStty) {
            $this->checkForKillSignal();
        }
    }

/**
     * Restores terminal state and signal handlers.
     */
    public function finish(): void
    {
        if (!$this->withStty) {
            return;
        }

// Safeguard in case an unhandled kill signal exists
        $this->checkForKillSignal();
        shell_exec('stty '.$this->initialState);
        $this->signalToKill = 0;

foreach ($this->signalHandlers as $signal => $originalHandler) {
            pcntl_signal($signal, $originalHandler);
        }
        $this->signalHandlers = [];
        $this->targetSignals = [];
    }

private function createSignalHandlers(): void
    {
        if (!\function_exists('pcntl_async_signals') || !\function_exists('pcntl_signal')) {
            return;
        }

pcntl_async_signals(true);
        $this->targetSignals = [\SIGINT, \SIGQUIT, \SIGTERM];

foreach ($this->targetSignals as $signal) {
            $this->signalHandlers[$signal] = pcntl_signal_get_handler($signal);

pcntl_signal($signal, function ($signal) {
                // Save current state, then restore to initial state
                $currentState = shell_exec('stty -g');
                shell_exec('stty '.$this->initialState);
                $originalHandler = $this->signalHandlers[$signal];

if (\is_callable($originalHandler)) {
                    $originalHandler($signal);
                    // Handler did not exit, so restore to current state
                    shell_exec('stty '.$currentState);

return;
                }

// Not a callable, so SIG_DFL or SIG_IGN
                if (\SIG_DFL === $originalHandler) {
                    $this->signalToKill = $signal;
                }
            });
        }
    }

private function checkForKillSignal(): void
    {
        if (\in_array($this->signalToKill, $this->targetSignals, true)) {
            // Try posix_kill
            if (\function_exists('posix_kill')) {
                pcntl_signal($this->signalToKill, \SIG_DFL);
                posix_kill(getmypid(), $this->signalToKill);
            }

// Best attempt fallback
            exit(128 + $this->signalToKill);
        }
    }
}

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