Android 应用程序中 shell 命令的语法

发布于 2025-01-07 09:26:26 字数 226 浏览 0 评论 0 原文

我正在尝试在我的应用程序中运行

String command = "su -c 'busybox ls /data'";
p = Runtime.getRuntime().exec(command);

，但语法似乎有些错误。不过，我从手机上的终端模拟器应用程序运行它没有问题，所以我只是不明白为什么从我的应用程序中调用它时它不起作用。

非常感谢任何帮助！

原文

I am trying to run

String command = "su -c 'busybox ls /data'";
p = Runtime.getRuntime().exec(command);

in my app, but it seems like the syntax is somehow wrong. I have no problem running it from the terminal emulator app on the phone, though, so I just can't understand why it is not working when called from within my app.

Any help is deeply appreciated!

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后eg是否自 2025-01-14 09:26:26

找到解决方案！感谢 onit 此处。请参阅下面的代码：为了使超级用户 shell 命令正常工作，您首先需要创建一个超级用户 shell 并将其分配给一个进程，然后分别对其输入和输出流进行写入和读取。

Process p = Runtime.getRuntime().exec(new String[]{"su", "-c", "system/bin/sh"});
DataOutputStream stdin = new DataOutputStream(p.getOutputStream());
//from here all commands are executed with su permissions
stdin.writeBytes("ls /data\n"); // \n executes the command
InputStream stdout = p.getInputStream();
byte[] buffer = new byte[BUFF_LEN];
int read;
String out = new String();
//read method will wait forever if there is nothing in the stream
//so we need to read it in another way than while((read=stdout.read(buffer))>0)
while(true){
    read = stdout.read(buffer);
    out += new String(buffer, 0, read);
    if(read<BUFF_LEN){
        //we have read everything
        break;
    }
}
//do something with the output

SOLUTION FOUND! Thanks to the link suggested by onit here. See the code below: for superuser shell commands to work properly, you first need to create a superuser shell and assign it to a process, then write and read on it's input and output streams respectively.

Process p = Runtime.getRuntime().exec(new String[]{"su", "-c", "system/bin/sh"});
DataOutputStream stdin = new DataOutputStream(p.getOutputStream());
//from here all commands are executed with su permissions
stdin.writeBytes("ls /data\n"); // \n executes the command
InputStream stdout = p.getInputStream();
byte[] buffer = new byte[BUFF_LEN];
int read;
String out = new String();
//read method will wait forever if there is nothing in the stream
//so we need to read it in another way than while((read=stdout.read(buffer))>0)
while(true){
    read = stdout.read(buffer);
    out += new String(buffer, 0, read);
    if(read<BUFF_LEN){
        //we have read everything
        break;
    }
}
//do something with the output

回复收藏 0 原文

夜司空 2025-01-14 09:26:26

使用以下功能：

public void shellCommandRunAsRoot(String Command)
{
 try 
  {
     Process RunProcess= Runtime.getRuntime().exec("su");
     DataOutputStream os;
     os = new DataOutputStream(RunProcess.getOutputStream()); 

     os.writeBytes(cmds+"\n");
         os.writeBytes("exit+\n");
     os.flush();

  }
  catch (IOException e)
  {
     // Handle Exception 
  }    
}

用法：

shellCommandRunAsRoot("pkill firefox");

Use the function below:

public void shellCommandRunAsRoot(String Command)
{
 try 
  {
     Process RunProcess= Runtime.getRuntime().exec("su");
     DataOutputStream os;
     os = new DataOutputStream(RunProcess.getOutputStream()); 

     os.writeBytes(cmds+"\n");
         os.writeBytes("exit+\n");
     os.flush();

  }
  catch (IOException e)
  {
     // Handle Exception 
  }    
}

Usage: