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Code Issues Releases Wiki Activity

Register signal handlers

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This commit is contained in:
Robert Gust-Bardon
2018-02-22 11:16:36 -06:00
parent fd8c787753
commit cf979844dc
3 changed files with 347 additions and 3 deletions
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80
src/Monolog/ErrorHandler.php
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@@ -14,11 +14,12 @@ namespace Monolog;
use Psr\Log\LoggerInterface;
use Psr\Log\LogLevel;
use Monolog\Handler\AbstractHandler;
use ReflectionExtension;
/**
* Monolog error handler
*
* A facility to enable logging of runtime errors, exceptions and fatal errors.
* A facility to enable logging of runtime errors, exceptions, fatal errors and signals.
*
* Quick setup: <code>ErrorHandler::register($logger);</code>
*
@@ -40,6 +41,10 @@ class ErrorHandler
private $reservedMemory;
private static $fatalErrors = array(E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR);
private $previousSignalHandler = array();
private $signalLevelMap = array();
private $signalRestartSyscalls = array();
public function __construct(LoggerInterface $logger)
{
$this->logger = $logger;
@@ -104,6 +109,37 @@ class ErrorHandler
$this->hasFatalErrorHandler = true;
}
public function registerSignalHandler($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 $this;
}
protected function defaultErrorLevelMap()
{
return array(
@@ -190,6 +226,48 @@ class ErrorHandler
}
}
public function handleSignal($signo, array $siginfo = null)
{
static $signals = array();
if (!$signals && extension_loaded('pcntl')) {
$pcntl = new ReflectionExtension('pcntl');
foreach ($pcntl->getConstants() as $name => $value) {
if (substr($name, 0, 3) === 'SIG' && $name[3] !== '_') {
$signals[$value] = $name;
}
}
}
$level = isset($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->restartSyscalls[$signo]) ? $this->restartSyscalls[$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 >= 71000) {
$this->previousSignalHandler[$signo]($signo, $siginfo);
} else {
$this->previousSignalHandler[$signo]($signo);
}
}
}
private static function codeToString($code)
{
switch ($code) {