Linux设备管理源码 字符设备驱动程序：设计两个终端设备文件实现一个字符设备驱动程序，使一对进程之间利用该字符设备驱动程序能互相传递可变长度的信息。-equipment management source Linux device drivers characters : two terminal equipment design documents for a character device driver, so that a process between the use of the