char *iface = NULL;
char *device_info = NULL;
-int device_total_in = 0;
-int device_total_out = 0;
+static int device_total_in = 0;
+static int device_total_out = 0;
-pid_t reader_pid;
-int sp[2];
+static pid_t reader_pid;
+static int sp[2];
bool setup_device(void)
{