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转自：http://blog.chinaunix.net/uid-25968088-id-3426027.html 原文地址：Linux 编程中的API函数和系统调用的关系作者：up哥小号 API：（Application Programming Interface,应用程...

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系统调用概述系统调用，顾名思义，说的是操作系统提供给用户程序调用的一组“特殊”接口。用户程序可以通过这组“特殊”接口来获得操作系统内核提供的服务，比如用户可以通过文件系统相关的调用请求系统打开文件、关闭文件或读写文件，可以通过时钟相关的系统调用获得系统时间或设置定时器等。从逻辑上来说，系统调用可...

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Linux下C编程，进程通信之标准流管道通信（即系统调用）

1.概述　　在编程的过程中总会需要使用系统调用，如linux下的ps，touch，rm，grep命令等；windows下的dir，mkdir，del命令等。　　在linux中执行系统调用，通常使用标准流管道。　　标准流管道将一系列的创建过程合并到一个函数popen()中。poen完成的工作有以...

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