如何提供sudo与root密码从Java？ [英] How to supply sudo with root password from Java?

问题描述

我想写一个小的Java应用程序，将覆盖我的 /etc/resolv.conf 文件（我在Ubuntu 12.04）。为此，我需要提供 root 密码：

  myUser @myMachine：〜$ sudo vim /etc/resolv.conf 
 [sudo] myUser的密码：***** 
  

这样做的过程有三个步骤：

1. 输入 sudo vim / etc / resolv.conf


2. 终端要求输入我的 root 密码


3. 我输入密码，然后按 [Enter]

从我研究的一切，我可以使用以下执行上面的步骤＃1：

  try {
 String installTrickledCmd =sudo vim /etc/resolv.conf; 
 Runtime runtime = Runtime.getRuntime（）; 
进程proc = runtime.exec（installTrickledCmd）; 
} 
 catch（Throwable throwable）{
 throw new RuntimeException（throwable）; 
} 
  

但是当执行时，shell会提示我的Java进程密码。我不知道如何等待这个（上面的步骤＃2），然后提供我的密码回到shell（上面的步骤3）。先感谢。

解决方案

您是否尝试过-S？

  $ echo mypassword | sudo -S vim /etc/resolv.conf 
  

来自man：

-S（stdin）选项使sudo从标准输入
而不是终端设备读取密码。密码后面必须是换行符
字符。


I'm trying to write a small Java app that will overwrite my /etc/resolv.conf file (I'm on Ubuntu 12.04). To do so, I need to supply my root password:

myUser@myMachine:~$ sudo vim /etc/resolv.conf 
[sudo] password for myUser: *****

So the process for doing this has three steps:

1. Type sudo vim /etc/resolv.conf at terminal
2. Terminal asks me to type my root password
3. I enter the password and press [Enter]

From everything I've researched, I could use the following for performing step #1 above:

try {
    String installTrickledCmd = "sudo vim /etc/resolv.conf";
    Runtime runtime = Runtime.getRuntime();
    Process proc = runtime.exec(installTrickledCmd);
}
catch(Throwable throwable) {
    throw new RuntimeException(throwable);
}

But when this executes, the shell will want to prompt my Java process for the password. I'm not sure how to wait for this (step #2 above) and then to supply my password back to the shell (step #3 above). Thanks in advance.

解决方案

Have you tried with -S ?

$echo mypassword | sudo -S vim /etc/resolv.conf

From man:

The -S (stdin) option causes sudo to read the password from the standard input 
instead of the terminal device.  The password must be followed by a newline 
character.

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