T形管异步 [英] Tee a Pipe Asynchronously

问题描述

我想同样的信息写入到两个管道，但我不希望等待第一管阅读。这里有一个例子

I would like to write the same information to two pipes, but I don't want to wait for the first pipe to read. Here's an example

mkfifo one
mkfifo two
echo hi | tee one two &
cat one &
cat two &

猫有一个不开始读，直到猫两个运行。有没有一种方法，使猫有一个运行，而无需等待？

cat one does not start reading until cat two is run. Is there a way to make cat one run without waiting?

推荐答案

问题：FIFO都阻塞，直到打开阅读即可。所以，只要打开一个读FD他们：

Problem: Fifos are blocking until opened for reading. So just open a read FD on them:

mkfifo one two
echo hi | tee one two &
exec 3<one
exec 4<two
cat <&3
cat <&4

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