从 URL 执行 bash 脚本 [英] Execute bash script from URL

问题描述

假设我在 URLhttp://mywebsite.com/myscript.txt"有一个包含脚本的文件:

Say I have a file at the URL "http://mywebsite.com/myscript.txt" that contains a script:

#!/bin/bash
echo "Hello, world!"
read -p "What is your name? " name
echo "Hello, ${name}!"

而且我想在不先将其保存到文件的情况下运行该脚本.我该怎么做?

And I'd like to run this script without first saving it to a file. How do I do this?

现在，我已经看到了语法:

Now, I've seen the syntax:

bash < <(curl -s http://mywebsite.com/myscript.txt)

但这似乎不像我保存到文件然后执行那样工作.例如 readline 不起作用，输出只是:

But this doesn't seem to work like it would if I saved to a file and then executed. For example readline doesn't work, and the output is just:

$ bash < <(curl -s http://mywebsite.com/myscript.txt)
Hello, world!

同样，我试过:

curl -s http://mywebsite.com/myscript.txt | bash -s --

结果相同.

最初我有一个解决方案:

Originally I had a solution like:

timestamp=`date +%Y%m%d%H%M%S`
curl -s http://mywebsite.com/myscript.txt -o /tmp/.myscript.${timestamp}.tmp
bash /tmp/.myscript.${timestamp}.tmp
rm -f /tmp/.myscript.${timestamp}.tmp

但这似乎很草率，我想要一个更优雅的解决方案.

But this seems sloppy, and I'd like a more elegant solution.

我知道有关从 URL 运行 shell 脚本的安全问题，但现在让我们忽略所有这些问题.

I'm aware of the security issues regarding running a shell script from a URL, but let's ignore all of that for right now.

推荐答案

source <(curl -s http://mywebsite.com/myscript.txt)

应该这样做.或者，不要对您的初始重定向进行重定向，即重定向标准输入；bash 需要一个文件名，无需重定向即可正常执行，<(command) 语法提供了一个路径.

ought to do it. Alternately, leave off the initial redirection on yours, which is redirecting standard input; bash takes a filename to execute just fine without redirection, and <(command) syntax provides a path.

bash <(curl -s http://mywebsite.com/myscript.txt)

如果你看一下echo <(cat/dev/null)

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