tor-android/src/org/torproject/android/service/TorServiceUtils.java

/* Copyright (c) 2009, Nathan Freitas, Orbot / The Guardian Project - http://openideals.com/guardian */
/* See LICENSE for licensing information */
package org.torproject.android.service;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;

import org.torproject.android.TorConstants;

import android.util.Log;

public class TorServiceUtils implements TorServiceConstants {

	
	
	public static int findProcessId(String command) throws IOException 
	{
		int procId = findProcessIdWithPS(command);
		return procId;
	}
	
	//use 'pidof' command
	/**
	public static int findProcessIdWithPidOf(String command) throws Exception
	{
		
		int procId = -1;
		
		Runtime r = Runtime.getRuntime();
		    	
		Process procPs = null;
		
		String baseName = new File(command).getName();
		//fix contributed my mikos on 2010.12.10
		procPs = r.exec(new String[] {SHELL_CMD_PIDOF, baseName});
        //procPs = r.exec(SHELL_CMD_PIDOF);
            
        BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream()));
        String line = null;

        while ((line = reader.readLine())!=null)
        {
        
        	try
        	{
        		//this line should just be the process id
        		procId = Integer.parseInt(line.trim());
        		break;
        	}
        	catch (NumberFormatException e)
        	{
        		Log.e("TorServiceUtils","unable to parse process pid: " + line,e);
        	}
        }
            
       
        return procId;

	}
	 * @throws IOException */
	
	//use 'ps' command
	public static int findProcessIdWithPS(String command) throws IOException 
	{
		
		int procId = -1;
		
		Runtime r = Runtime.getRuntime();
		    	
		Process procPs = null;
		
		String processKey = new File(command).getName();
		
        procPs = r.exec(SHELL_CMD_PS + ' ' + processKey); // this is the android ps <name> command
            
        BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream()));
        String line = reader.readLine(); //read first line "headers" USER PID PPID etc
        
        while ((line = reader.readLine())!=null)
        {
        	if (line.contains(processKey))
        	{
        		String[] lineParts = line.split("\\s+");
        		
        		procId = Integer.parseInt(lineParts[1]);
        		
        		break;
        	}
        }
       
        return procId;

	}
}