/* See LICENSE file for copyright and license details. */
/* how often to update the statusbar (min value == 1) */
-#define UPDATE_INTERVAL 1
+static const int update_interval = 1;
/* text to show if no value can be retrieved */
-#define UNKNOWN_STR "n/a"
+static const char unknown_str[] = "n/a";
/* maximum output string length */
#define MAXLEN 2048