static int ip_fd = -1;
char *device = NULL;
char *iface = NULL;
-static char *device_info = NULL;
+static const char *device_info = NULL;
static bool setup_device(void) {
char *type;
char *ptr = device;
get_config_string(lookup_config(config_tree, "Interface"), &ptr);
- while(*ptr && !isdigit(*ptr)) {
+ while(*ptr && !isdigit((uint8_t) *ptr)) {
ptr++;
}