语法单行BASH的无限while循环 [英] Syntax for a single-line BASH infinite while loop

问题描述

有未来与分号和/或括号的正确组合的麻烦。我想这样做，但在命令行中只有一行：

 ，而[1]
做
    富
    睡眠2
DONE
 

解决方案

 而真实的;做富;睡眠2; DONE
 

顺便说一句，如果你键入它作为一个多（因为你是显示），在命令提示符下，然后调用箭头向上的历史，你会得到它在一行上，正确地打断。

  $，而真正的
＆GT;做
＆GT;回声你好
＆GT;睡眠2
＆GT; DONE
你好
你好
你好
^ C
$＆LT;箭头向上＆GT;而真实的;不要回声你好;睡眠2; DONE
 

Having trouble coming up with the right combination of semicolons and/or braces. I'd like to do this, but as a one-liner from the command line:

while [ 1 ]
do
    foo
    sleep 2
done

解决方案

while true; do foo; sleep 2; done

By the way, if you type it as a multiline (as you are showing) at the command prompt and then call the history with arrow up, you will get it on a single line, correctly punctuated.

$ while true
> do
>    echo "hello"
>    sleep 2
> done
hello
hello
hello
^C
$ <arrow up> while true; do    echo "hello";    sleep 2; done

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