Android Open Source - reflector Su

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License

The source code is released under:

Copyright (c) 2011 Hannes Romppainen Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the ...

Java Source Code

package com.webs.graub.reflector;
/*  w  w  w  .  j  av a2s.  c  o  m*/
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;

import android.util.Log;

public class Su {

  public static boolean testRootPrivileges() {
    boolean retval = false;
    Process suProcess;

    try {
      suProcess = Runtime.getRuntime().exec("su");

      DataOutputStream os = new DataOutputStream(
          suProcess.getOutputStream());
      BufferedReader osRes = new BufferedReader(
          new InputStreamReader(suProcess.getInputStream()));

      if (null != os && null != osRes) {
        // Getting the id of the current user to check if this is root
        os.writeBytes("id\n");
        os.flush();

        String currUid = osRes.readLine();
        boolean exitSu = false;
        if (null == currUid) {
          retval = false;
          exitSu = false;
          Log.d("Reflector", "Can't get root access or denied by user");
        } else if (true == currUid.contains("uid=0")) {
          retval = true;
          exitSu = true;
          Log.d("Reflector", "Root access granted");
        } else {
          retval = false;
          exitSu = true;
          Log.d("Reflector", "Root access rejected: " + currUid);
        }

        if (exitSu) {
          os.writeBytes("exit\n");
          os.flush();
        }
      }
    } catch (Exception e) {
      // Can't get root !
      // Probably broken pipe exception on trying to write to output
      // stream after su failed, meaning that the device is not rooted

      retval = false;
      Log.d("Reflector", "Root access rejected [" + e.getClass().getName()
          + "] : " + e.getMessage());
    }

    return retval;
  }

  public static boolean execute(List<String> commands) {
    boolean retval = false;

    try {
      if (null != commands && commands.size() > 0) {
        Process suProcess = Runtime.getRuntime().exec("su");

        DataOutputStream os = new DataOutputStream(
            suProcess.getOutputStream());

        // Execute commands that require root access
        for (String currCommand : commands) {
          os.writeBytes(currCommand + "\n");
          os.flush();
        }

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

        try {
          int suProcessRetval = suProcess.waitFor();
          if (255 != suProcessRetval) {
            // Root access granted
            retval = true;
          } else {
            // Root access denied
            retval = false;
          }
        } catch (Exception ex) {
          Log.e("Reflector", "Error executing root action", ex);
        }
      }
    } catch (IOException ex) {
      Log.w("Reflector", "Can't get root access", ex);
    } catch (SecurityException ex) {
      Log.w("Reflector", "Can't get root access", ex);
    } catch (Exception ex) {
      Log.w("Reflector", "Error executing internal operation", ex);
    }

    return retval;
  }

}

Java Source Code List

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