From 3bcecef5df0245df693a19c615d4842fc9d0f3d0 Mon Sep 17 00:00:00 2001
From: dqos <8611981+dqos@users.noreply.github.com>
Date: Thu, 14 Apr 2022 12:12:50 +0200
Subject: [PATCH] Fix for Debian in Docker.

---
 LookingGlass.php | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/LookingGlass.php b/LookingGlass.php
index 9f28782..043b651 100644
--- a/LookingGlass.php
+++ b/LookingGlass.php
@@ -311,14 +311,16 @@ class LookingGlass
             foreach ($pipes as $pipe) {
                 fclose($pipe);
             }
-            // retrieve parent pid
-            $ppid = $status['pid'];
-            // use ps to get all the children of this process
-            $pids = preg_split('/\s+/', `ps -o pid --no-heading --ppid $ppid`);
-            // kill remaining processes
-            foreach($pids as $pid) {
-                if (is_numeric($pid)) {
-                    posix_kill($pid, 9);
+            if ($status['pid']) {
+                // retrieve parent pid
+                //$ppid = $status['pid'];
+                // use ps to get all the children of this process
+                $pids = preg_split('/\s+/', 'ps -o pid --no-heading --ppid '.$status['pid']);
+                // kill remaining processes
+                foreach ($pids as $pid) {
+                    if (is_numeric($pid)) {
+                        posix_kill($pid, 9);
+                    }
                 }
             }
             proc_close($process);