From 326bf37208fa77437db101a88b5d0728b2cafc35 Mon Sep 17 00:00:00 2001
From: Blackyfff <freifunk@freifunk-herpf.de>
Date: Thu, 6 Apr 2023 01:32:04 +0200
Subject: [PATCH] Fix: prevent multiple instaces

Signed-off-by: Blackyfff <freifunk@freifunk-herpf.de>
---
 usr/lib/ffdns/update-dns.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/usr/lib/ffdns/update-dns.sh b/usr/lib/ffdns/update-dns.sh
index eaa89ab..1691495 100755
--- a/usr/lib/ffdns/update-dns.sh
+++ b/usr/lib/ffdns/update-dns.sh
@@ -39,6 +39,8 @@ ForwardZones="$MasterDomain""/""$ZoneFilesFolder""db.""$FirstInternalView"".""$M
 
 SetupCache
 
+flock -n "$DNSSCRIPT_TEMP_FOLDER""script.lock" -c :
+
 CachedMasterFile="$DNSSCRIPT_TEMP_FOLDER""cache/db.""$MasterDomain"
 PreFetchMasterSerial="$(GetZoneFileSerial "$CachedMasterFile")"
 GetMasterFile