bash脚本无限循环一行语法 [英] bash script infinite loop one line syntax

问题描述

我有一个简单的bash脚本，它逐行读取文件并将其打印到屏幕上(从另一个SO答案中采用).

I have a simple bash script which reads from a file, line by line and prints it to the screen (adopted from another SO answer).

，而IFS =读-r行||[[-n"$ line"]];回显"$ line"；睡2;完成<testfile.txt

我想使它成为无限循环，以便一旦到达文件末尾，便从头开始:

I want to make this an infinite loop so that once it reaches the end of the file, it starts from the beginning again:

我尝试在开始时添加一个 while true; / while [1]; /甚至一个 while:; ，但是没有一个这些工作.按下Enter键后，它会显示> 提示符.

I tried adding a while true; / while [ 1 ]; / even a while :; at the beginning, but none of these work. Upon pressing enter, it gives the > prompt.

如何使此循环无限长并将其保持为单线?

How do I make this loop infinite and maintain it as a one-liner?

推荐答案

也许是这样吗?

while true; do while IFS= read -r line || [[ -n "$line" ]]; do echo "$line"; sleep 2; done < test.txt ; done

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