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<?php /* * This file is part of the Monolog package. * * (c) Jordi Boggiano <j.boggiano@seld.be> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Monolog; use Psr\Log\LoggerInterface; use Psr\Log\LogLevel; use ReflectionExtension; /** * Monolog POSIX signal handler * * @author Robert Gust-Bardon <robert@gust-bardon.org> */ class SignalHandler { private $logger; private $previousSignalHandler = array(); private $signalLevelMap = array(); private $signalRestartSyscalls = array(); public function __construct(LoggerInterface $logger) { $this->logger = $logger; } public function registerSignalHandler($signo, $level = LogLevel::CRITICAL, $callPrevious = true, $restartSyscalls = true, $async = true) { if (!extension_loaded('pcntl') || !function_exists('pcntl_signal')) { return $this; } if ($callPrevious) { if (function_exists('pcntl_signal_get_handler')) { $handler = pcntl_signal_get_handler($signo); if ($handler === false) { return $this; } $this->previousSignalHandler[$signo] = $handler; } else { $this->previousSignalHandler[$signo] = true; } } else { unset($this->previousSignalHandler[$signo]); } $this->signalLevelMap[$signo] = $level; $this->signalRestartSyscalls[$signo] = $restartSyscalls; if (function_exists('pcntl_async_signals') && $async !== null) { pcntl_async_signals($async); } pcntl_signal($signo, array($this, 'handleSignal'), $restartSyscalls); return $this; } public function handleSignal($signo, array $siginfo = null) { static $signals = array(); if (!$signals && extension_loaded('pcntl')) { $pcntl = new ReflectionExtension('pcntl'); $constants = $pcntl->getConstants(); if (!$constants) { // HHVM 3.24.2 returns an empty array. $constants = get_defined_constants(true); $constants = $constants['Core']; } foreach ($constants as $name => $value) { if (substr($name, 0, 3) === 'SIG' && $name[3] !== '_' && is_int($value)) { $signals[$value] = $name; } } unset($constants); } $level = isset($this->signalLevelMap[$signo]) ? $this->signalLevelMap[$signo] : LogLevel::CRITICAL; $signal = isset($signals[$signo]) ? $signals[$signo] : $signo; $context = isset($siginfo) ? $siginfo : array(); $this->logger->log($level, sprintf('Program received signal %s', $signal), $context); if (!isset($this->previousSignalHandler[$signo])) { return; } if ($this->previousSignalHandler[$signo] === true || $this->previousSignalHandler[$signo] === SIG_DFL) { if (extension_loaded('pcntl') && function_exists('pcntl_signal') && function_exists('pcntl_sigprocmask') && function_exists('pcntl_signal_dispatch') && extension_loaded('posix') && function_exists('posix_getpid') && function_exists('posix_kill')) { $restartSyscalls = isset($this->signalRestartSyscalls[$signo]) ? $this->signalRestartSyscalls[$signo] : true; pcntl_signal($signo, SIG_DFL, $restartSyscalls); pcntl_sigprocmask(SIG_UNBLOCK, array($signo), $oldset); posix_kill(posix_getpid(), $signo); pcntl_signal_dispatch(); pcntl_sigprocmask(SIG_SETMASK, $oldset); pcntl_signal($signo, array($this, 'handleSignal'), $restartSyscalls); } } elseif (is_callable($this->previousSignalHandler[$signo])) { if (PHP_VERSION_ID >= 70100) { $this->previousSignalHandler[$signo]($signo, $siginfo); } else { $this->previousSignalHandler[$signo]($signo); } } } }
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