fix: handle invalid directory paths

The code now checks if the server files or system directory exist before proceeding. If either directory does not exist, an error message is printed and the script exits.

lgsm/modules/check_system_dir.sh

@@ -7,16 +7,18 @@
 
 moduleselfname="$(basename "$(readlink -f "${BASH_SOURCE[0]}")")"
 
-if [ "${commandname}" != "VALIDATE" ]; then
-	checkdir="${serverfiles}"
-else
-	checkdir="${systemdir}"
+if [ ! -d "${serverfiles}" ]; then
+	fn_print_fail_nl "Cannot access ${serverfiles}: No such directory"
+	if [ -d "${lgsmlogdir}" ]; then
+		fn_script_log_fatal "Cannot access ${serverfiles}: No such directory."
+	fi
+	core_exit.sh
 fi
 
-if [ ! -d "${checkdir}" ]; then
-	fn_print_fail_nl "Cannot access ${checkdir}: No such directory"
+if [ ! -d "${systemdir}" ]; then
+	fn_print_fail_nl "Cannot access ${systemdir}: No such directory"
 	if [ -d "${lgsmlogdir}" ]; then
-		fn_script_log_fatal "Cannot access ${checkdir}: No such directory."
+		fn_script_log_fatal "Cannot access ${systemdir}: No such directory."
 	fi
 	core_exit.sh
 fi