重定向到屏幕和管道 [英] Redirect to both screen and pipe

问题描述

我想将一些输出传递到另一个程序并显示进度条.

I want to pipe some output to another program and display a progress bar.

代码看起来像这样:

echo "Progress:"
(for i in {1..10}; do echo $i; echo "." > screen; sleep 1; done) | xargs echo

其中 screen 会将其定向到屏幕.这是行不通的，因为它只会将点写入文件屏幕.

where screen would direct it to the screen. This is not working because it will just write the dots to the file screen.

我想做的是输出."在脚本运行时，同时一次将所有 echo"$ i" 进行管道传输，因此只有一个管道传输发生.

What I want to do is outputting the "." while the script is running and piping all the echo "$i" at once at the end, so only one piping occurs.

推荐答案

您必须将回显发送到tty设备.例如，echo'somthing'>/dev/tty

You have to send the echo to the tty device. For example, echo 'somthing' > /dev/tty

但是，如果您只想在屏幕上显示点，则不需要任何重定向.只回显'.'

But if you only want to show dots in the screen you don't need any redirection. Only echo '.'

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