Operating Systems驱动程序 Operating Systems设备文件Unix类操作系统都是基于文件概念的文件是以字符序列而构成的信息载体因此一个IO设备也可以当作文件来处理与普通文件交互的系统调用也可以直接用于IO设备例如对devlp0设备文件的write()可以将数据发往打印机 Operating Systems设备文件的分类根据设备驱动程序的基本特性设备文件可以分为：字符设

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