如何使用bash冲洗管道 [英] How to flush a pipe using bash

问题描述

我有写入到一个命名管道，从管道中读取的脚本和其他。偶尔，启动脚本的时候我已经注意到，管的内容从脚本的previous运行存在。有没有办法在脚本的开始？

I have a script that writes to a named pipe and another that reads from the pipe. Occasionally, when starting the script I have noticed that the contents of the pipe exist from a previous run of the script. Is there a way to flush out the pipe at the beginning of the script?

推荐答案

我觉得 DD 是您的朋友：

dd if=myfifo iflag=nonblock of=/dev/null

strace的显示

strace shows

open("myfifo", O_RDONLY|O_NONBLOCK)

确实不甚至一个空的FIFO存储块。

and indeed doesn't even block on an empty fifo.

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