Android Open Source - AutoHosts Root Checker

• Back to Development/file  ↑

From Project

Back to project page AutoHosts.

License

The source code is released under:

MIT License

Java Source Code

package com.yeyaxi.AutoHosts;
/*from www .j  a v a2  s.  c o  m*/
import android.util.Log;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.FileReader;
import java.io.IOException;

/**
 * @author bert
 */
public class RootChecker
{
    private static final String TAG = RootChecker.class.getSimpleName();

  public static boolean hasRoot ()
  {
    Log.i(TAG, "Checking for root permission");
    try
    {
      String[] mountLocation = SystemMount.getMountLocation();
      // Perform SU to get root privileges
      Process p = Runtime.getRuntime().exec("su");

      DataOutputStream os = new DataOutputStream(p.getOutputStream());
      os.writeBytes("mount -o rw,remount -t " + mountLocation[1] + " " + mountLocation[0] + " /system\n");

      os.writeBytes("echo Root Test > /system/rootcheck.txt\n");
      os.writeBytes("mount -o ro,remount -t " + mountLocation[1] + " " + mountLocation[0] + " /system\n");
      os.writeBytes("exit\n");
      os.flush();

      p.waitFor();
      if (p.exitValue() != 255)
      {
        String fileContents = readFileContents();
        if (fileContents == null || !fileContents.equals("Root Test"))
        {
          Log.d(TAG, "Reading back contexnts failed.");
          return false;
        }
        // Phone is rooted
        Log.d(TAG, "Phone is Rooted");
        return true;
      } else
      {
        // Phone is not rooted
        Log.d(TAG, "Phone is not Rooted");
      }
    } catch (UnableToMountSystemException ex)
    {
      Log.e(TAG, "Unable to mount the /system folder as read-write", ex);
    } catch (InterruptedException ex)
    {
      Log.e(TAG, "Interupt exception when waiting for user to grant root permission", ex);
    } catch (IOException ex)
    {
      Log.e(TAG, "IO Exception when checking if phone is rooted", ex);
    }
    return false;

  }

  private static String readFileContents () throws IOException
  {
    FileReader fReader = null;
    BufferedReader br = null;
    try
    {
      fReader = new FileReader("/system/rootcheck.txt");
      br = new BufferedReader(fReader);

      StringBuilder sb = new StringBuilder();

      String line = null;
      while ((line = br.readLine()) != null)
      {
        sb.append(line);
      }
      return sb.toString();
    } finally
    {
      if (br != null)
        br.close();
      if (fReader != null)
        fReader.close();
    }
  }

}

Java Source Code List

• Back to Development/file  ↑