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

问题描述

说我有在包含脚本的URLhttp://mywebsite.com/myscript.txt的文件：

 ＃！/斌/庆典
回声你好，世界！
阅读-p你叫什么名字？名称
回声你好，$ {name}的！
 

和我想不先保存到一个文件运行此脚本。我该怎么做呢？

现在，我见过的语法：

 庆典＆LT; ≤（卷曲-s http://mywebsite.com/myscript.txt）
 

但这似乎并不像它想如果我保存到一个文件，然后执行工作。例如readline的不工作，并且输出仅仅是：

  $庆典＆LT; ≤（卷曲-s http://mywebsite.com/myscript.txt）
你好，世界！
 

同样，我已经试过：

 卷曲-s http://mywebsite.com/myscript.txt |庆典-s  - 
 

使用相同的结果。

我本来喜欢一个解决方案：

 时间戳=`日期+％Y％M％D％H％M％S`
卷曲-s http://mywebsite.com/myscript.txt -o /tmp/.myscript.${timestamp}.tmp
庆典/tmp/.myscript.${timestamp}.tmp
RM -f /tmp/.myscript.${timestamp}.tmp
 

但这似乎邋遢，我想一个更好的解决方案。

我知道关于从URL运行shell脚本的安全问题，但让我们忽略了这一切的现在。

解决方案

 来源≤（卷曲-s http://mywebsite.com/myscript.txt）
 

应该这样做。另外，离开了你们都要初始重定向，这是重定向标准输入; 庆典将文件名不进行重新定向到执行就好了，和≤（命令）语法提供了一个路径

 庆典≤（卷曲-s http://mywebsite.com/myscript.txt）
 

（猫的/ dev / null的）

如果你看看回声＆LT的输出可能更清晰

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}!"

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

Now, I've seen the syntax:

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

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!

Similarly, I've tried:

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

With the same results.

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

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

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.

解决方案

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

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)

It may be clearer if you look at the output of echo <(cat /dev/null)

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