+#define NAME_SIZE 100
+#define OWNER_SIZE 30
+#define GROUP_SIZE 30
+
+struct device_attr {
+ char name[NAME_SIZE];
+ char owner[OWNER_SIZE];
+ char group[GROUP_SIZE];
+ int mode;
+};
+
+extern int udev_add_device(char *device, char *subsystem);
+extern int udev_remove_device(char *device, char *subsystem);