Gracefully handle SIGQUIT.

src/Illuminate/Queue/Worker.php

@@ -39,6 +39,13 @@ class Worker
      */
     protected $exceptions;
 
+    /**
+     * Indicates if the worker should exit.
+     *
+     * @var bool
+     */
+    protected $shouldQuit = false;
+
     /**
      * Indicates if the worker is paused.
      *
@@ -87,6 +94,10 @@ public function daemon($connectionName, $queue, WorkerOptions $options)
 
             $this->registerTimeoutHandler($job, $options);
 
+            if ($this->shouldQuit) {
+                $this->kill();
+            }
+
             // If the daemon should run (not in maintenance mode, etc.), then we can run
             // fire off this job for processing. Otherwise, we will need to sleep the
             // worker so no more jobs are processed until they should be processed.
@@ -448,6 +459,10 @@ protected function listenForSignals()
         if ($this->supportsAsyncSignals()) {
             pcntl_async_signals(true);
 
+            pcntl_signal(SIGQUIT, function () {
+                $this->shouldQuit = true;
+            });
+
             pcntl_signal(SIGUSR2, function () {
                 $this->paused = true;
             });