在Linux系统中枚举当前在线的USB设备，并检测USB设备的热插拔。-On Linux systems enumerate USB devices are currently online, and to detect USB device hot-plug.

自己写的例程，模拟USB初始化时枚举设备时动态数组的使用过程。只实现了其中的APPEND部分。其中SIZE为零的数组是其特点。-Write my own routine, simulation enumerate USB device initialization process of using the dynamic arrays. only part of APPEND. which is characterized by an array of zero size.