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[tor-commits] [orbot/master] reduce use of "kill" process command for only PDSND and not tor



commit f23e9540eb6bf7e192eef94c5f9ab45217a46b00
Author: n8fr8 <nathan@xxxxxxxxxxxxxxxxxxxx>
Date:   Tue Feb 4 13:23:34 2020 -0500

    reduce use of "kill" process command for only PDSND and not tor
    - it is no longer needed for tor, and was causing the app to exit on some devices
    - also, now specifically kill pdnsd using the stored PID
---
 .../torproject/android/service/OrbotService.java   |  7 +++---
 .../android/service/vpn/OrbotVpnManager.java       | 22 ++++++++++++++++--
 .../torproject/android/service/vpn/VpnUtils.java   | 27 +++++++++++++++++++---
 3 files changed, 48 insertions(+), 8 deletions(-)

diff --git a/orbotservice/src/main/java/org/torproject/android/service/OrbotService.java b/orbotservice/src/main/java/org/torproject/android/service/OrbotService.java
index f806e42a..dbd36dbd 100644
--- a/orbotservice/src/main/java/org/torproject/android/service/OrbotService.java
+++ b/orbotservice/src/main/java/org/torproject/android/service/OrbotService.java
@@ -85,7 +85,6 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.TimeoutException;
 
 import static org.torproject.android.service.vpn.VpnUtils.getSharedPrefs;
-import static org.torproject.android.service.vpn.VpnUtils.killProcess;
 
 public class OrbotService extends Service implements TorServiceConstants, OrbotConstants
 {
@@ -472,6 +471,7 @@ public class OrbotService extends Service implements TorServiceConstants, OrbotC
             conn = null;
         }
 
+        /**
         if (mLastProcessId != -1)
             killProcess(mLastProcessId + "", "-9");
 
@@ -489,7 +489,7 @@ public class OrbotService extends Service implements TorServiceConstants, OrbotC
             killProcess(fileTor, "-9"); // this is -HUP
         } catch (Exception e) {
             e.printStackTrace();
-        }
+        }**/
 
     }
 
@@ -502,12 +502,13 @@ public class OrbotService extends Service implements TorServiceConstants, OrbotC
         } catch (IOException e) {
             e.printStackTrace();
         }
+        /**
         // if that fails, try again using native utils
         try {
             killProcess(fileTor, "-1"); // this is -HUP
         } catch (Exception e) {
             e.printStackTrace();
-        }
+        }**/
     }
 
     protected void logNotice (String msg)
diff --git a/orbotservice/src/main/java/org/torproject/android/service/vpn/OrbotVpnManager.java b/orbotservice/src/main/java/org/torproject/android/service/vpn/OrbotVpnManager.java
index 0367ad04..14ecc20d 100644
--- a/orbotservice/src/main/java/org/torproject/android/service/vpn/OrbotVpnManager.java
+++ b/orbotservice/src/main/java/org/torproject/android/service/vpn/OrbotVpnManager.java
@@ -33,6 +33,8 @@ import android.util.Log;
 import android.widget.Toast;
 import com.runjva.sourceforge.jsocks.protocol.ProxyServer;
 import com.runjva.sourceforge.jsocks.server.ServerAuthenticatorNone;
+
+import org.apache.commons.io.IOUtils;
 import org.torproject.android.service.OrbotConstants;
 import org.torproject.android.service.OrbotService;
 import org.torproject.android.service.R;
@@ -49,6 +51,7 @@ import java.io.InputStreamReader;
 import java.io.PrintStream;
 import java.net.InetAddress;
 import java.util.ArrayList;
+import java.util.List;
 import java.util.concurrent.TimeoutException;
 
 import static org.torproject.android.service.TorServiceConstants.ACTION_START;
@@ -92,11 +95,12 @@ public class OrbotVpnManager implements Handler.Callback {
 
 		filePdnsd = CustomNativeLoader.loadNativeBinary(service.getApplicationContext(),PDNSD_BIN,new File(service.getFilesDir(),PDNSD_BIN));
 
+		/**
 		try {
 			killProcess(filePdnsd, "-1");
 		} catch (Exception e) {
 			e.printStackTrace();
-		}
+		}**/
 
 		Tun2Socks.init();
 
@@ -417,6 +421,8 @@ public class OrbotVpnManager implements Handler.Callback {
 
 		File fileConf = makePdnsdConf(mService, mService.getFilesDir(), torDnsHost, torDnsPort, pdnsdHost, pdnsdPort);
 
+
+
         String[] cmdString = {pdnsPath,"-c",fileConf.toString(),"-g","-v2"};
         ProcessBuilder pb = new ProcessBuilder(cmdString);
         pb.redirectErrorStream(true);
@@ -441,6 +447,18 @@ public class OrbotVpnManager implements Handler.Callback {
     private boolean stopDns ()
 	{
 
+		File filePdnsPid = new File(mService.getFilesDir(),"pdnsd.pid");
+		List<String> lines = null;
+		try {
+			lines = IOUtils.readLines(new FileReader(filePdnsPid));
+			String dnsPid = lines.get(0);
+			killProcess(dnsPid,"");
+		} catch (Exception e) {
+			Log.e("OrbotVPN","error killing dns process",e);
+		}
+
+
+		/**
 		// if that fails, try again using native utils
 		try {
 			killProcess(filePdnsd, "-1"); // this is -HUP
@@ -466,7 +484,7 @@ public class OrbotVpnManager implements Handler.Callback {
 			} catch (Exception e) {
 				Log.e(TAG,"error killing DNS Process: " + pid,e);
 			}
-		}
+		}**/
 
 
 		return false;
diff --git a/orbotservice/src/main/java/org/torproject/android/service/vpn/VpnUtils.java b/orbotservice/src/main/java/org/torproject/android/service/vpn/VpnUtils.java
index acc15316..4ac71410 100644
--- a/orbotservice/src/main/java/org/torproject/android/service/vpn/VpnUtils.java
+++ b/orbotservice/src/main/java/org/torproject/android/service/vpn/VpnUtils.java
@@ -3,6 +3,9 @@ package org.torproject.android.service.vpn;
 import android.app.ActivityManager;
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.util.Log;
+
+import org.apache.commons.io.IOUtils;
 
 import java.io.BufferedReader;
 import java.io.File;
@@ -22,9 +25,10 @@ public class VpnUtils {
                 Context.MODE_MULTI_PROCESS);
     }
 
+
     public static int findProcessId(String command) throws IOException {
 
-        String[] cmds = {"ps -ef","ps -A","toolbox ps","busybox ps"};
+        String[] cmds = {"ps -ef","ps -A","toolbox ps"};
 
         for (int i = 0; i < cmds.length;i++) {
             Process procPs = getRuntime().exec(cmds[i]);
@@ -96,12 +100,29 @@ public class VpnUtils {
 
     public static void killProcess(String pidString, String signal) throws Exception {
 
-        String[] cmds = {"","busybox ","toolbox "};
+        String[] cmds = {"","toolbox ","busybox "};
 
         for (int i = 0; i < cmds.length;i++) {
             try {
-                getRuntime().exec("toolbox kill " + signal + " " + pidString);
+                Process proc = getRuntime().exec(cmds[i] + "kill " + signal + " " + pidString);
+                int exitVal = proc.exitValue();
+                List<String> lineErrors = IOUtils.readLines(proc.getErrorStream());
+                List<String> lineInputs = IOUtils.readLines(proc.getInputStream());
+
+                if (exitVal != 0)
+                {
+                    Log.d("Orbot.killProcess","exit=" + exitVal);
+                    for (String line: lineErrors)
+                        Log.d("Orbot.killProcess",line);
+
+                    for (String line: lineInputs)
+                        Log.d("Orbot.killProcess",line);
+
+                }
+
+
             } catch (IOException ioe) {
+                Log.e("Orbot.killprcess","error killing process: " + pidString,ioe);
             }
         }
 



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