如何在python中验证root权限的用户密码

问题描述

我正在尝试编写一个需要用户密码才能使用 subprocess 库运行一些外部命令的 Python 程序.代码大致如下所示.

I'm attempting to write a python program that requires a the users password to run some external commands using the subprocess libraries. The code is going to look roughly like this.

import subprocess

passwordInput = raw_input("What is your password: ")

subprocess.call('echo ' + passwordInput + ' | sudo -S pacman -Syy', shell=True)

此程序运行良好，但如果您输入错误的密码，程序将失败.我将如何添加某种防错功能来检测密码是否输入错误?

This program works fine, however if you enter the incorrect password, the program fails. How would I go about adding some kind of error proofing to detect if the password is entered incorrectly?

我想也许将这段代码包装在 while 循环中，然后使用 try-except 来测试密码，但是我不确定是哪种 except 可以做到这一点.

I was thinking perhaps wrapping this code in a while loop and then using a try-except to test the password, however I'm not sure what kind of except could do this.

非常感谢任何帮助.

推荐答案

放弃 echo.

import subprocess
subprocess.call(['sudo', '-S', 'pacman', '-Syy'])

sudo 程序会询问用户一定次数.您的 Python 程序无需知道用户的密码.曾经.

The sudo program will ask the user a certain number of times. There's no need for your Python program to know the user's password. Ever.

另一个问题是你使用的是 shell=True，这意味着如果我的密码是 $nakel0ver 因为我喜欢蛇，你的程序会传递一个空密码给sudo.

Another concern is that you are using shell=True, which means that if my password is $nakel0ver because I love snakes, your program will pass an empty password to sudo.

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