wait for regulation loop to end instead of waiting for 15seconds in order to (possibly) speed up the script

Author: yankee42

runs/update.sh

@@ -57,7 +57,9 @@ for i in $(seq 4 8); do
 	fi
 done
 
-sleep 15
+# Wait for regulation loops to end.
+# Using `xargs` because it might be running multiple times
+pgrep -f '/var/www/html/openWB/regel.sh$' | timeout 15 xargs -n1 -I'{}' tail -f --pid="{}" /dev/null
 
 # backup some files before fetching new release
 # module soc_eq