read() 和 fread() 有什么区别? [英] What is the difference between read() and fread()?

问题描述

我正在阅读 linux 工具 badblocks 的源代码.他们在那里使用 read() 函数.与标准的 C fread() 函数有区别吗?(我没有将参数视为差异.)

I'm reading source code of the linux tool badblocks. They use the read() function there. Is there a difference to the standard C fread() function? (I'm not counting the arguments as a difference.)

推荐答案

read() 是一种低级别的无缓冲读取.它在 UNIX 上进行直接系统调用.

read() is a low level, unbuffered read. It makes a direct system call on UNIX.

fread() 是 C 库的一部分，提供缓冲读取.它通常通过调用 read() 来实现，以填充其缓冲区.

fread() is part of the C library, and provides buffered reads. It is usually implemented by calling read() in order to fill its buffer.

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