v6.23

+ DietPi-WiFi-Monitor | Do not load globals to reduce RAM usage and loading time a bid
+ DietPi-WiFi-Monitor | RootFS R/W access is not required by this script
+ DietPi-WiFi-Monitor | Allow to pass $TICKRATE to this script, e.g. for testing purpose currently. Possibly pass this via environment variable/file from systemd service in the future, to allow customisation based on end user requirements.

rootfs/var/lib/dietpi/services/dietpi-wifi-monitor.sh

@@ -1,23 +1,21 @@
 #!/bin/bash
 {
 
-	#Import DietPi-Globals ---------------------------------------------------------------
-	. /DietPi/dietpi/func/dietpi-globals
-	G_PROGRAM_NAME='DietPi-WiFi-Monitor'
-	G_CHECK_ROOT_USER
-	G_CHECK_ROOTFS_RW
-	G_INIT
-	#Import DietPi-Globals ---------------------------------------------------------------
-
-	#Update network info
+	# Check for root permissions
+	(( $UID )) && { echo 'ERROR: Root permissions required. Please run this script with "sudo". Exiting...'; exit 1; }
+
+	# Check for concurrent execution
+	pgrep -f 'dietpi-wifi-monitor.sh' &> /dev/null && { echo 'ERROR: Concurrent execution detected. Please exit the running instance of DietPi-WiFi-Monitor first. Exiting...'; exit 1; }
+
+	# Update network info
 	/DietPi/dietpi/func/obtain_network_details
 
 	URL_PING=''
 	ADAPTER="wlan$(sed -n 2p /DietPi/dietpi/.network)"
-	TICKRATE=10
+	TICKRATE={TICKRATE:-10}
 
 	#-------------------------------------------------------------------------------------
-	#Main
+	# Main
 	#-------------------------------------------------------------------------------------
 	# Check for valid WiFi adapter
 	[[ -e /sys/class/net/$ADAPTER ]] || { echo "ERROR: No valid WiFi adapter found on interface: $ADAPTER. Exiting..."; exit 1; }