From 6465b5e9a657d7bdac464ae7d603cbdb34f60c30 Mon Sep 17 00:00:00 2001
From: SinTan1729 <sayantan.santra689@gmail.com>
Date: Sun, 31 Jul 2022 19:03:32 -0500
Subject: [PATCH] Make sure only one instance is running using flock

---
 impfilesbk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/impfilesbk b/impfilesbk
index d02b0d9..f111248 100644
--- a/impfilesbk
+++ b/impfilesbk
@@ -2,6 +2,9 @@
 
 # This script backs up some important stuff
 
+# Run only one instance of this script at one time
+[ "${BKLOCKER}" != "running" ] && exec env BKLOCKER="running" flock -en "/tmp/impfilesbk" "$0" "$@" || :
+
 # Setup location for home and backup directory
 HMDIR="/home/sintan"
 BKDIR="/mnt/storage/sintan"