套接字对和成对的未命名管道之间有什么区别吗? [英] Is there any difference between socketpair and pair of unnamed pipes?

问题描述

我不仅想了解用户方面的差异，还想知道Linux内核实现中的差异/常见部分.

I would like to know not only user-side differences, but differences / common parts in Linux kernel implementation as well.

推荐答案

• 管道是单向的，因此需要两个管道进行双向通信，而套接字对是双向的.

  • pipes are unidirectional, so you need two pipes to have bidirectional communication, whereas a socketpair is bidirectional.

    管道始终面向流，而套接字对则面向数据报.

    pipes are always stream-oriented, whereas socketpairs can be datagram-oriented.

    套接字对是普通的 AF_UNIX 套接字，这意味着可以通过它们传递辅助消息，例如 SCM_RIGHTS 和 SCM_CREDENTIALS .p>

  socketpairs are normal AF_UNIX sockets, which means that ancillary messages like SCM_RIGHTS and SCM_CREDENTIALS can be passed over them.

  在内核中，管道在文件系统代码中实现，套接字对在网络代码中实现.

  In the kernel, pipes are implemented in the filesystem code and socketpairs in the networking code.

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