From 1c582baa2c196c04b8069401178c5b2ea59a167c Mon Sep 17 00:00:00 2001
From: Jeroen De Meerleer <me@jeroened.be>
Date: Sat, 15 Apr 2017 10:13:22 +0200
Subject: [PATCH] Added locking of the script

---
 webcron.php | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/webcron.php b/webcron.php
index 8eafcd5..e2aed5f 100644
--- a/webcron.php
+++ b/webcron.php
@@ -26,6 +26,12 @@
 
 require_once "include/initialize.inc.php";
 
+if(file_exists('cache/webcron.lock'))
+{
+    die('Script is already running');
+}
+touch('cache/webcron.lock');
+
 $stmt = $db->query('SELECT jobID, url, delay, nextrun FROM jobs WHERE nextrun < ' . time());
 $results = $stmt->fetchAll(PDO::FETCH_ASSOC);
 
@@ -49,4 +55,6 @@ foreach ($results as $result) {
 
 }
 
+unlink('cache/webcron.lock');
+
 require_once 'include/finalize.inc.php';