在UNIX不错，setpriority的区别 [英] Difference between nice and setpriority in unix

问题描述

我想实现不同的风味UNIX的C.我所看到的尼斯（）系统调用和setpriority（）调用的定义好的命令。尼斯（）调用只递增/递减进程的优先级。如果我想一个进程的优先级设置为一个特定的值，我不能用漂亮的（）调用？基本上，除了优先是如何修改等，有很好的（）和setpriority任何区别（）？

I'm trying to implement a different flavor of the 'nice' command of unix in C. I have seen the definitions of nice() system call and setpriority() call. The nice() call only increments/decrements the priority of the process. If I want to set the priority of a process to a particular value, can't I use the nice() call? Basically, other than how the priority is modified, is there any difference between nice() and setpriority() ?

推荐答案

这是历史性的。 尼斯（）长被引入之前 setpriority（）。为了向后兼容性，很好功能被保留。

It's historical. nice() was introduced long before setpriority(). For backwards compatibility, the nice function was retained.

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