diff --git a/src/main/java/com/topjohnwu/magisk/LogFragment.java b/src/main/java/com/topjohnwu/magisk/LogFragment.java
index fa0a9b994..e61e275e1 100644
--- a/src/main/java/com/topjohnwu/magisk/LogFragment.java
+++ b/src/main/java/com/topjohnwu/magisk/LogFragment.java
@@ -10,6 +10,7 @@ import android.view.ViewGroup;
 
 import com.topjohnwu.magisk.adapters.TabFragmentAdapter;
 import com.topjohnwu.magisk.components.Fragment;
+import com.topjohnwu.magisk.utils.Const;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
@@ -33,7 +34,9 @@ public class LogFragment extends Fragment {
 
         TabFragmentAdapter adapter = new TabFragmentAdapter(getChildFragmentManager());
 
-        adapter.addTab(new SuLogFragment(), getString(R.string.superuser));
+        if (!(Const.USER_ID > 0 && getApplication().multiuserMode == Const.Value.MULTIUSER_MODE_OWNER_MANAGED)) {
+            adapter.addTab(new SuLogFragment(), getString(R.string.superuser));
+        }
         adapter.addTab(new MagiskLogFragment(), getString(R.string.magisk));
         tab.setupWithViewPager(viewPager);
         tab.setVisibility(View.VISIBLE);
diff --git a/src/main/java/com/topjohnwu/magisk/MagiskManager.java b/src/main/java/com/topjohnwu/magisk/MagiskManager.java
index df67eb2a7..35445f809 100644
--- a/src/main/java/com/topjohnwu/magisk/MagiskManager.java
+++ b/src/main/java/com/topjohnwu/magisk/MagiskManager.java
@@ -39,7 +39,6 @@ public class MagiskManager extends Application {
 
     // Info
     public boolean hasInit = false;
-    public int userId;
     public String magiskVersionString;
     public int magiskVersionCode = -1;
     public String remoteMagiskVersionString;
@@ -95,14 +94,6 @@ public class MagiskManager extends Application {
     public void onCreate() {
         super.onCreate();
         prefs = PreferenceManager.getDefaultSharedPreferences(this);
-        userId = getApplicationInfo().uid / 100000;
-
-        if (Utils.getDatabasePath(this, SuDatabaseHelper.DB_NAME).exists()) {
-            // Don't migrate yet, wait and check Magisk version
-            suDB = new SuDatabaseHelper(this);
-        } else {
-            suDB = new SuDatabaseHelper();
-        }
 
         // Handle duplicate package
         if (!getPackageName().equals(Const.ORIG_PKG_NAME)) {
@@ -113,11 +104,15 @@ public class MagiskManager extends Application {
                 startActivity(intent);
                 return;
             } catch (PackageManager.NameNotFoundException ignored) { /* Expected */ }
-        } else {
+        }
+
+        suDB = new SuDatabaseHelper(true);
+
+        if (getPackageName().equals(Const.ORIG_PKG_NAME)) {
             String pkg = suDB.getStrings(Const.Key.SU_REQUESTER, null);
             if (pkg != null) {
                 suDB.setStrings(Const.Key.SU_REQUESTER, null);
-                Shell.su_raw("pm uninstall " + pkg);
+                Utils.uninstallPkg(pkg);
             }
         }
 
@@ -216,6 +211,11 @@ public class MagiskManager extends Application {
         } catch (NumberFormatException e) {
             keepEnc = false;
         }
+
+        if (suDB != null) {
+            suDB.close();
+            suDB = new SuDatabaseHelper();
+        }
     }
 
     public void setPermissionGrantCallback(Runnable callback) {
diff --git a/src/main/java/com/topjohnwu/magisk/MainActivity.java b/src/main/java/com/topjohnwu/magisk/MainActivity.java
index c99b47aa6..414460723 100644
--- a/src/main/java/com/topjohnwu/magisk/MainActivity.java
+++ b/src/main/java/com/topjohnwu/magisk/MainActivity.java
@@ -149,13 +149,13 @@ public class MainActivity extends Activity
         menu.findItem(R.id.magiskhide).setVisible(
                 Shell.rootAccess() && mm.magiskVersionCode >= 1300
                         && prefs.getBoolean(Const.Key.MAGISKHIDE, false));
-        menu.findItem(R.id.modules).setVisible(
+        menu.findItem(R.id.modules).setVisible(!mm.prefs.getBoolean(Const.Key.COREONLY, false) &&
                 Shell.rootAccess() && mm.magiskVersionCode >= 0);
-        menu.findItem(R.id.downloads).setVisible(Utils.checkNetworkStatus() &&
-                Shell.rootAccess() && mm.magiskVersionCode >= 0);
-        menu.setGroupVisible(R.id.second_group, !mm.prefs.getBoolean(Const.Key.COREONLY, false));
+        menu.findItem(R.id.downloads).setVisible(!mm.prefs.getBoolean(Const.Key.COREONLY, false)
+                && Utils.checkNetworkStatus() && Shell.rootAccess() && mm.magiskVersionCode >= 0);
         menu.findItem(R.id.log).setVisible(Shell.rootAccess());
-        menu.findItem(R.id.superuser).setVisible(Shell.rootAccess());
+        menu.findItem(R.id.superuser).setVisible(Shell.rootAccess() &&
+                !(Const.USER_ID > 0 && mm.multiuserMode == Const.Value.MULTIUSER_MODE_OWNER_MANAGED));
     }
 
     public void navigate(String item) {
diff --git a/src/main/java/com/topjohnwu/magisk/SettingsActivity.java b/src/main/java/com/topjohnwu/magisk/SettingsActivity.java
index 95d339e37..1919a2762 100644
--- a/src/main/java/com/topjohnwu/magisk/SettingsActivity.java
+++ b/src/main/java/com/topjohnwu/magisk/SettingsActivity.java
@@ -133,12 +133,12 @@ public class SettingsActivity extends Activity implements Topic.Subscriber {
 
             setSummary();
 
-            // Disable dangerous settings in user mode if selected owner manage
-            if (mm.userId > 0) {
+            // Disable dangerous settings in secondary user
+            if (Const.USER_ID > 0) {
                 suCategory.removePreference(multiuserMode);
             }
 
-            // Remove re-authentication option on Android O, it will not work
+            // Disable re-authentication option on Android O, it will not work
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                 reauth.setEnabled(false);
                 reauth.setSummary(R.string.android_o_not_support);
@@ -155,9 +155,13 @@ public class SettingsActivity extends Activity implements Topic.Subscriber {
                 generalCatagory.removePreference(hideManager);
             }
 
+            if (!Shell.rootAccess() || (Const.USER_ID > 0 &&
+                    mm.multiuserMode == Const.Value.MULTIUSER_MODE_OWNER_MANAGED)) {
+                prefScreen.removePreference(suCategory);
+            }
+
             if (!Shell.rootAccess()) {
                 prefScreen.removePreference(magiskCategory);
-                prefScreen.removePreference(suCategory);
                 generalCatagory.removePreference(hideManager);
             } else if (mm.magiskVersionCode < 1300) {
                 prefScreen.removePreference(magiskCategory);
diff --git a/src/main/java/com/topjohnwu/magisk/SplashActivity.java b/src/main/java/com/topjohnwu/magisk/SplashActivity.java
index 774603e84..34d203a27 100644
--- a/src/main/java/com/topjohnwu/magisk/SplashActivity.java
+++ b/src/main/java/com/topjohnwu/magisk/SplashActivity.java
@@ -15,7 +15,6 @@ import com.topjohnwu.magisk.asyncs.LoadModules;
 import com.topjohnwu.magisk.asyncs.ParallelTask;
 import com.topjohnwu.magisk.asyncs.UpdateRepos;
 import com.topjohnwu.magisk.components.Activity;
-import com.topjohnwu.magisk.database.SuDatabaseHelper;
 import com.topjohnwu.magisk.services.UpdateCheckService;
 import com.topjohnwu.magisk.utils.Const;
 import com.topjohnwu.magisk.utils.Shell;
@@ -68,9 +67,6 @@ public class SplashActivity extends Activity {
                 mm.bootBlock = ret.get(0);
             }
 
-            // Setup suDB
-            SuDatabaseHelper.setupSuDB();
-
             // Add update checking service
             if (Const.Value.UPDATE_SERVICE_VER > mm.prefs.getInt(Const.Key.UPDATE_SERVICE_VER, -1)) {
                 ComponentName service = new ComponentName(this, UpdateCheckService.class);
diff --git a/src/main/java/com/topjohnwu/magisk/asyncs/FlashZip.java b/src/main/java/com/topjohnwu/magisk/asyncs/FlashZip.java
index 3795d4786..ac1395ee9 100644
--- a/src/main/java/com/topjohnwu/magisk/asyncs/FlashZip.java
+++ b/src/main/java/com/topjohnwu/magisk/asyncs/FlashZip.java
@@ -38,7 +38,7 @@ public class FlashZip extends ParallelTask<Void, Void, Integer> {
 
     private boolean unzipAndCheck() throws Exception {
         ZipUtils.unzip(mCachedFile, mCachedFile.getParentFile(), "META-INF/com/google/android", true);
-        List<String> ret = Utils.readFile(new File(mCachedFile.getParentFile(), "updater-script").getPath());
+        List<String> ret = Utils.readFile(new File(mCachedFile.getParentFile(), "updater-script"));
         return Utils.isValidShellResponse(ret) && ret.get(0).contains("#MAGISK");
     }
 
diff --git a/src/main/java/com/topjohnwu/magisk/asyncs/HideManager.java b/src/main/java/com/topjohnwu/magisk/asyncs/HideManager.java
index d1448d63f..0933621f8 100644
--- a/src/main/java/com/topjohnwu/magisk/asyncs/HideManager.java
+++ b/src/main/java/com/topjohnwu/magisk/asyncs/HideManager.java
@@ -14,7 +14,6 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.security.SecureRandom;
 import java.util.List;
-import java.util.Locale;
 import java.util.jar.JarEntry;
 
 public class HideManager extends ParallelTask<Void, Void, Boolean> {
@@ -130,7 +129,7 @@ public class HideManager extends ParallelTask<Void, Void, Boolean> {
 
         mm.suDB.setStrings(Const.Key.SU_REQUESTER, pkg);
         Utils.dumpPrefs();
-        Shell.su_raw("pm uninstall " + Const.ORIG_PKG_NAME);
+        Utils.uninstallPkg(Const.ORIG_PKG_NAME);
 
         return true;
     }
diff --git a/src/main/java/com/topjohnwu/magisk/asyncs/RestoreStockBoot.java b/src/main/java/com/topjohnwu/magisk/asyncs/RestoreImages.java
similarity index 94%
rename from src/main/java/com/topjohnwu/magisk/asyncs/RestoreStockBoot.java
rename to src/main/java/com/topjohnwu/magisk/asyncs/RestoreImages.java
index 1d19f73c3..9df543660 100644
--- a/src/main/java/com/topjohnwu/magisk/asyncs/RestoreStockBoot.java
+++ b/src/main/java/com/topjohnwu/magisk/asyncs/RestoreImages.java
@@ -9,7 +9,7 @@ import com.topjohnwu.magisk.utils.Utils;
 
 import java.util.List;
 
-public class RestoreStockBoot extends ParallelTask<Void, Void, Boolean> {
+public class RestoreImages extends ParallelTask<Void, Void, Boolean> {
 
     @Override
     protected Boolean doInBackground(Void... voids) {
diff --git a/src/main/java/com/topjohnwu/magisk/container/Policy.java b/src/main/java/com/topjohnwu/magisk/container/Policy.java
index 24389a96d..d7e9d769c 100644
--- a/src/main/java/com/topjohnwu/magisk/container/Policy.java
+++ b/src/main/java/com/topjohnwu/magisk/container/Policy.java
@@ -21,7 +21,7 @@ public class Policy implements Comparable<Policy>{
     public Policy(int uid, PackageManager pm) throws PackageManager.NameNotFoundException {
         String[] pkgs = pm.getPackagesForUid(uid);
         if (pkgs == null || pkgs.length == 0) throw new PackageManager.NameNotFoundException();
-        this.uid = uid % 100000;
+        this.uid = uid;
         packageName = pkgs[0];
         info = pm.getApplicationInfo(packageName, 0);
         appName = info.loadLabel(pm).toString();
diff --git a/src/main/java/com/topjohnwu/magisk/database/SuDatabaseHelper.java b/src/main/java/com/topjohnwu/magisk/database/SuDatabaseHelper.java
index 2a4908645..ebb1a2500 100644
--- a/src/main/java/com/topjohnwu/magisk/database/SuDatabaseHelper.java
+++ b/src/main/java/com/topjohnwu/magisk/database/SuDatabaseHelper.java
@@ -15,10 +15,12 @@ import com.topjohnwu.magisk.MagiskManager;
 import com.topjohnwu.magisk.R;
 import com.topjohnwu.magisk.container.Policy;
 import com.topjohnwu.magisk.container.SuLogEntry;
+import com.topjohnwu.magisk.utils.Const;
 import com.topjohnwu.magisk.utils.Shell;
 import com.topjohnwu.magisk.utils.Utils;
 
 import java.io.File;
+import java.io.IOException;
 import java.text.DateFormat;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -34,78 +36,75 @@ public class SuDatabaseHelper extends SQLiteOpenHelper {
     private static final String LOG_TABLE = "logs";
     private static final String SETTINGS_TABLE = "settings";
     private static final String STRINGS_TABLE = "strings";
-
-    private static String GLOBAL_DB;
+    private static final File GLOBAL_DB = new File("/data/adb/magisk.db");
 
     private Context mContext;
     private PackageManager pm;
     private SQLiteDatabase mDb;
 
-    private static Context preProcess() {
+    private static Context initDB(boolean local) {
         Context context;
+        MagiskManager ce = MagiskManager.get();
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-            Context ce = MagiskManager.get();
-            context = ce.createDeviceProtectedStorageContext();
-            File oldDB = Utils.getDatabasePath(ce, DB_NAME);
-            if (oldDB.exists()) {
+            Context de = ce.createDeviceProtectedStorageContext();
+            File deDB = Utils.getDatabasePath(de, DB_NAME);
+            if (deDB.exists()) {
+                context = de;
+            } else if (ce.magiskVersionCode > 1410) {
                 // Migrate DB path
-                context.moveDatabaseFrom(ce, DB_NAME);
+                context = de;
+                de.moveDatabaseFrom(ce, DB_NAME);
+            } else {
+                context = ce;
             }
         } else {
-            context = MagiskManager.get();
+            context = ce;
         }
-        GLOBAL_DB = context.getFilesDir().getParentFile().getParent() + "/magisk.db";
+
         File db = Utils.getDatabasePath(context, DB_NAME);
-        if (!db.exists() && Utils.itemExist(GLOBAL_DB)) {
-            // Migrate global DB to ours
-            db.getParentFile().mkdirs();
-            Shell.su(
-                    "magisk --clone-attr " + context.getFilesDir() + " " + GLOBAL_DB,
-                    "chmod 660 " + GLOBAL_DB,
-                    "ln " + GLOBAL_DB + " " + db
-            );
+        if (local && db.length() == 0) {
+            ce.loadMagiskInfo();
+            return initDB(false);
+        }
+
+        // Only care about local db (no shell involved)
+        if (local)
+            return context;
+
+        // We need to make sure the global db is setup properly
+        if (ce.magiskVersionCode >= 1464 && Shell.rootAccess()) {
+            Shell.su_raw(Utils.fmt("mkdir %s; chmod 700 %s", GLOBAL_DB.getParent(), GLOBAL_DB.getParent()));
+            if (!Utils.itemExist(GLOBAL_DB)) {
+                db = context.getDatabasePath(DB_NAME);
+                Shell.su(Utils.fmt("cp -af %s %s; rm -f %s*", db, GLOBAL_DB, db));
+            }
+
+            try {
+                db.createNewFile();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+
+            // Make sure the global and local db matches
+            if (!TextUtils.equals(Utils.checkMD5(GLOBAL_DB), Utils.checkMD5(db))) {
+                Shell.su(Utils.fmt(
+                        "chown 0.0 %s; chmod 666 %s; chcon u:object_r:su_file:s0 %s;" +
+                                "mount -o bind %s %s",
+                        GLOBAL_DB, GLOBAL_DB, GLOBAL_DB, GLOBAL_DB, db));
+            }
         }
         return context;
     }
 
-    public static void setupSuDB() {
-        MagiskManager mm = MagiskManager.get();
-        // Check if we need to migrate suDB
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N && mm.magiskVersionCode >= 1410 &&
-                Utils.getDatabasePath(mm, SuDatabaseHelper.DB_NAME).exists()) {
-            mm.suDB.close();
-            mm.suDB = new SuDatabaseHelper();
-        }
-
-        File suDbFile = mm.suDB.getDbFile();
-
-        if (!Utils.itemExist(GLOBAL_DB)) {
-            // Hard link our DB globally
-            Shell.su_raw("ln " + suDbFile + " " + GLOBAL_DB);
-        }
-
-        // Check if we are linked globally
-        List<String> ret = Shell.sh("ls -l " + suDbFile);
-        if (Utils.isValidShellResponse(ret)) {
-            try {
-                int links = Integer.parseInt(ret.get(0).trim().split("\\s+")[1]);
-                if (links < 2) {
-                    mm.suDB.close();
-                    suDbFile.delete();
-                    new File(suDbFile + "-journal").delete();
-                    mm.suDB = new SuDatabaseHelper();
-                }
-            } catch (Exception e) {
-                e.printStackTrace();
-            }
-        }
-    }
-
     public SuDatabaseHelper() {
-        this(preProcess());
+        this(false);
     }
 
-    public SuDatabaseHelper(Context context) {
+    public SuDatabaseHelper(boolean local) {
+        this(initDB(local));
+    }
+
+    private SuDatabaseHelper(Context context) {
         super(context, DB_NAME, null, DATABASE_VER);
         mContext = context;
         pm = context.getPackageManager();
@@ -127,44 +126,32 @@ public class SuDatabaseHelper extends SQLiteOpenHelper {
             }
             if (oldVersion == 1) {
                 // We're dropping column app_name, rename and re-construct table
-                db.execSQL("ALTER TABLE " + POLICY_TABLE + " RENAME TO " + POLICY_TABLE + "_old");
+                db.execSQL(Utils.fmt("ALTER TABLE %s RENAME TO %s_old", POLICY_TABLE));
 
                 // Create the new tables
                 createTables(db);
 
                 // Migrate old data to new tables
-                db.execSQL(
-                        "INSERT INTO " + POLICY_TABLE + " SELECT " +
-                                "uid, package_name, policy, until, logging, notification " +
-                                "FROM " + POLICY_TABLE + "_old");
-                db.execSQL("DROP TABLE " + POLICY_TABLE + "_old");
+                db.execSQL(Utils.fmt("INSERT INTO %s SELECT " +
+                        "uid, package_name, policy, until, logging, notification FROM %s_old",
+                        POLICY_TABLE, POLICY_TABLE));
+                db.execSQL(Utils.fmt("DROP TABLE %s_old", POLICY_TABLE));
 
-                File oldDB = Utils.getDatabasePath(MagiskManager.get(), "sulog.db");
-                if (oldDB.exists()) {
-                    migrateLegacyLogList(oldDB, db);
-                    MagiskManager.get().deleteDatabase("sulog.db");
-                }
+                MagiskManager.get().deleteDatabase("sulog.db");
                 ++oldVersion;
             }
             if (oldVersion == 2) {
-                db.execSQL("UPDATE " + LOG_TABLE + " SET time=time*1000");
+                db.execSQL(Utils.fmt("UPDATE %s SET time=time*1000", LOG_TABLE));
                 ++oldVersion;
             }
             if (oldVersion == 3) {
-                db.execSQL(
-                        "CREATE TABLE IF NOT EXISTS " + STRINGS_TABLE + " " +
-                                "(key TEXT, value TEXT, PRIMARY KEY(key))");
+                db.execSQL(Utils.fmt("CREATE TABLE IF NOT EXISTS %s (key TEXT, value TEXT, PRIMARY KEY(key))", STRINGS_TABLE));
                 ++oldVersion;
             }
             if (oldVersion == 4) {
-                db.execSQL("UPDATE " + POLICY_TABLE + " SET uid=uid%100000");
+                db.execSQL(Utils.fmt("UPDATE %s SET uid=uid%%100000", POLICY_TABLE));
                 ++oldVersion;
             }
-
-            if (!Utils.itemExist(GLOBAL_DB)) {
-                // Hard link our DB globally
-                Shell.su_raw("ln " + getDbFile() + " " + GLOBAL_DB);
-            }
         } catch (Exception e) {
             e.printStackTrace();
             onDowngrade(db, DATABASE_VER, 0);
@@ -208,15 +195,13 @@ public class SuDatabaseHelper extends SQLiteOpenHelper {
 
     private void cleanup() {
         // Clear outdated policies
-        mDb.delete(POLICY_TABLE, "until > 0 AND until < ?",
-                new String[] { String.valueOf(System.currentTimeMillis() / 1000) });
+        mDb.delete(POLICY_TABLE, Utils.fmt("until > 0 AND until < ?", System.currentTimeMillis() / 1000), null);
         // Clear outdated logs
-        mDb.delete(LOG_TABLE, "time < ?", new String[] { String.valueOf(
-                System.currentTimeMillis() - MagiskManager.get().suLogTimeout * 86400000) });
+        mDb.delete(LOG_TABLE, Utils.fmt("time < ?", System.currentTimeMillis() - MagiskManager.get().suLogTimeout * 86400000), null);
     }
 
     public void deletePolicy(Policy policy) {
-        deletePolicy(policy.packageName);
+        deletePolicy(policy.uid);
     }
 
     public void deletePolicy(String pkg) {
@@ -224,12 +209,12 @@ public class SuDatabaseHelper extends SQLiteOpenHelper {
     }
 
     public void deletePolicy(int uid) {
-        mDb.delete(POLICY_TABLE, "uid=?", new String[]{String.valueOf(uid)});
+        mDb.delete(POLICY_TABLE, Utils.fmt("uid=%d", uid), null);
     }
 
     public Policy getPolicy(int uid) {
         Policy policy = null;
-        try (Cursor c = mDb.query(POLICY_TABLE, null, "uid=?", new String[] { String.valueOf(uid % 100000) }, null, null, null)) {
+        try (Cursor c = mDb.query(POLICY_TABLE, null, Utils.fmt("uid=%d", uid), null, null, null, null)) {
             if (c.moveToNext()) {
                 policy = new Policy(c, pm);
             }
@@ -240,30 +225,17 @@ public class SuDatabaseHelper extends SQLiteOpenHelper {
         return policy;
     }
 
-    public Policy getPolicy(String pkg) {
-        Policy policy = null;
-        try (Cursor c = mDb.query(POLICY_TABLE, null, "package_name=?", new String[] { pkg }, null, null, null)) {
-            if (c.moveToNext()) {
-                policy = new Policy(c, pm);
-            }
-        } catch (PackageManager.NameNotFoundException e) {
-            deletePolicy(pkg);
-            return null;
-        }
-        return policy;
-    }
-
     public void addPolicy(Policy policy) {
         mDb.replace(POLICY_TABLE, null, policy.getContentValues());
     }
 
     public void updatePolicy(Policy policy) {
-        mDb.update(POLICY_TABLE, policy.getContentValues(), "package_name=?",
-                new String[] { policy.packageName });
+        mDb.update(POLICY_TABLE, policy.getContentValues(), Utils.fmt("uid=%d", policy.uid), null);
     }
 
     public List<Policy> getPolicyList(PackageManager pm) {
-        try (Cursor c = mDb.query(POLICY_TABLE, null, null, null, null, null, null)) {
+        try (Cursor c = mDb.query(POLICY_TABLE, null, Utils.fmt("uid/100000=%d", Const.USER_ID),
+                null, null, null, null)) {
             List<Policy> ret = new ArrayList<>(c.getCount());
             while (c.moveToNext()) {
                 try {
@@ -280,7 +252,8 @@ public class SuDatabaseHelper extends SQLiteOpenHelper {
     }
 
     public List<List<Integer>> getLogStructure() {
-        try (Cursor c = mDb.query(LOG_TABLE, new String[] { "time" }, null, null, null, null, "time DESC")) {
+        try (Cursor c = mDb.query(LOG_TABLE, new String[] { "time" }, Utils.fmt("from_uid/100000=%d", Const.USER_ID),
+                null, null, null, "time DESC")) {
             List<List<Integer>> ret = new ArrayList<>();
             List<Integer> list = null;
             String dateString = null, newString;
@@ -299,22 +272,8 @@ public class SuDatabaseHelper extends SQLiteOpenHelper {
     }
 
     public Cursor getLogCursor() {
-        return getLogCursor(mDb);
-    }
-
-    public Cursor getLogCursor(SQLiteDatabase db) {
-        return db.query(LOG_TABLE, null, null, null, null, null, "time DESC");
-    }
-
-    private void migrateLegacyLogList(File oldDB, SQLiteDatabase newDB) {
-        try (SQLiteDatabase oldDb = SQLiteDatabase.openDatabase(oldDB.getPath(), null, SQLiteDatabase.OPEN_READWRITE);
-             Cursor c = getLogCursor(oldDb)) {
-            while (c.moveToNext()) {
-                ContentValues values = new ContentValues();
-                DatabaseUtils.cursorRowToContentValues(c, values);
-                newDB.insert(LOG_TABLE, null, values);
-            }
-        }
+        return mDb.query(LOG_TABLE, null, Utils.fmt("from_uid/100000=%d", Const.USER_ID),
+                null, null, null, "time DESC");
     }
 
     public void addLog(SuLogEntry log) {
diff --git a/src/main/java/com/topjohnwu/magisk/utils/Const.java b/src/main/java/com/topjohnwu/magisk/utils/Const.java
index 81c2c5811..e2cdd0ec9 100644
--- a/src/main/java/com/topjohnwu/magisk/utils/Const.java
+++ b/src/main/java/com/topjohnwu/magisk/utils/Const.java
@@ -1,6 +1,7 @@
 package com.topjohnwu.magisk.utils;
 
 import android.os.Environment;
+import android.os.Process;
 
 import java.io.File;
 import java.util.Arrays;
@@ -63,6 +64,8 @@ public class Const {
             "com.nianticlabs.pokemongo"
     );
 
+    public static final int USER_ID = Process.myUid() / 100000;
+
     public static class ID {
         public static final int UPDATE_SERVICE_ID = 1;
         public static final int FETCH_ZIP = 2;
diff --git a/src/main/java/com/topjohnwu/magisk/utils/ShowUI.java b/src/main/java/com/topjohnwu/magisk/utils/ShowUI.java
index 73f65ed6a..3eccf5e5d 100644
--- a/src/main/java/com/topjohnwu/magisk/utils/ShowUI.java
+++ b/src/main/java/com/topjohnwu/magisk/utils/ShowUI.java
@@ -7,6 +7,7 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
+import android.os.Handler;
 import android.support.v4.app.NotificationCompat;
 import android.support.v4.app.TaskStackBuilder;
 import android.support.v7.app.AlertDialog;
@@ -16,14 +17,13 @@ import com.topjohnwu.magisk.FlashActivity;
 import com.topjohnwu.magisk.MagiskManager;
 import com.topjohnwu.magisk.R;
 import com.topjohnwu.magisk.SplashActivity;
-import com.topjohnwu.magisk.asyncs.RestoreStockBoot;
+import com.topjohnwu.magisk.asyncs.RestoreImages;
 import com.topjohnwu.magisk.components.AlertDialogBuilder;
 import com.topjohnwu.magisk.receivers.DownloadReceiver;
 import com.topjohnwu.magisk.receivers.ManagerUpdate;
 import com.topjohnwu.magisk.receivers.RebootReceiver;
 
-import java.io.File;
-import java.io.FileOutputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
@@ -258,42 +258,35 @@ public class ShowUI {
             .setTitle(R.string.uninstall_magisk_title)
             .setMessage(R.string.uninstall_magisk_msg)
             .setPositiveButton(R.string.complete_uninstall, (d, i) -> {
-                try {
-                    InputStream in = mm.getAssets().open(Const.UNINSTALLER);
-                    File uninstaller = new File(mm.getCacheDir(), Const.UNINSTALLER);
-                    FileOutputStream out = new FileOutputStream(uninstaller);
-                    byte[] bytes = new byte[1024];
-                    int read;
-                    while ((read = in.read(bytes)) != -1) {
-                        out.write(bytes, 0, read);
-                    }
-                    in.close();
-                    out.close();
-                    in = mm.getAssets().open(Const.UTIL_FUNCTIONS);
-                    File utils = new File(mm.getCacheDir(), Const.UTIL_FUNCTIONS);
-                    out = new FileOutputStream(utils);
-                    while ((read = in.read(bytes)) != -1) {
-                        out.write(bytes, 0, read);
-                    }
-                    in.close();
-                    out.close();
-                    Shell.su(
-                            "cat " + uninstaller + " > /cache/" + Const.UNINSTALLER,
-                            "cat " + utils + " > /data/magisk/" + Const.UTIL_FUNCTIONS
-                    );
-                    MagiskManager.toast(R.string.uninstall_toast, Toast.LENGTH_LONG);
-                    Shell.su_raw(
-                            "sleep 5",
-                            "pm uninstall " + mm.getApplicationInfo().packageName
-                    );
+                ByteArrayOutputStream uninstaller = new ByteArrayOutputStream();
+                try (InputStream in = mm.getAssets().open(Const.UNINSTALLER)) {
+                    Utils.inToOut(in, uninstaller);
                 } catch (IOException e) {
                     e.printStackTrace();
+                    return;
                 }
+                ByteArrayOutputStream utils = new ByteArrayOutputStream();
+                try (InputStream in = mm.getAssets().open(Const.UTIL_FUNCTIONS)) {
+                    Utils.inToOut(in, utils);
+                } catch (IOException e) {
+                    e.printStackTrace();
+                    return;
+                }
+
+                Shell.su(
+                        Utils.fmt("echo '%s' > /cache/%s", uninstaller.toString().replace("'", "'\\''"), Const.UNINSTALLER),
+                        Utils.fmt("echo '%s' > /data/magisk/%s", utils.toString().replace("'", "'\\''"), Const.UTIL_FUNCTIONS)
+                );
+                try {
+                    uninstaller.close();
+                    utils.close();
+                } catch (IOException ignored) {}
+
+                MagiskManager.toast(R.string.uninstall_toast, Toast.LENGTH_LONG);
+                new Handler().postDelayed(() -> Utils.uninstallPkg(mm.getPackageName()), 5000);
             })
-            .setNeutralButton(R.string.restore_stock_boot, (d, i) -> {
-                new RestoreStockBoot().exec();
-            })
-            .setNegativeButton(R.string.no_thanks, null)
+            .setNeutralButton(R.string.restore_img, (d, i) -> new RestoreImages().exec())
+            .setNegativeButton(R.string.uninstall_app, (d, i) -> Utils.uninstallPkg(mm.getPackageName()))
             .show();
     }
 }
diff --git a/src/main/java/com/topjohnwu/magisk/utils/Utils.java b/src/main/java/com/topjohnwu/magisk/utils/Utils.java
index e362a635f..bdf1eb7c7 100644
--- a/src/main/java/com/topjohnwu/magisk/utils/Utils.java
+++ b/src/main/java/com/topjohnwu/magisk/utils/Utils.java
@@ -45,24 +45,32 @@ public class Utils {
 
     public static boolean isDownloading = false;
 
-    public static boolean itemExist(String path) {
+    public static boolean itemExist(Object path) {
         List<String> ret = Shell.su(fmt("[ -e %s ] && echo true || echo false", path));
         return isValidShellResponse(ret) && Boolean.parseBoolean(ret.get(0));
     }
 
-    public static void createFile(String path) {
-        String folder = path.substring(0, path.lastIndexOf('/'));
-        Shell.su_raw(fmt("mkdir -p %s 2>/dev/null; touch %s 2>/dev/null", folder, path));
+    public static void createFile(Object path) {
+        Shell.su_raw(fmt("mkdir -p `dirname '%s'` 2>/dev/null; touch '%s' 2>/dev/null", path, path));
     }
 
-    public static void removeItem(String path) {
+    public static void removeItem(Object path) {
         Shell.su_raw(fmt("rm -rf %s 2>/dev/null", path));
     }
 
-    public static List<String> readFile(String path) {
+    public static List<String> readFile(Object path) {
         return Shell.su(fmt("cat %s | sed '$a\\ ' | sed '$d'", path));
     }
 
+    public static String checkMD5(Object path) {
+        List<String> ret = Shell.su(fmt("md5sum %s", path));
+        return isValidShellResponse(ret) ? ret.get(0).split("\\s+")[0] : null;
+    }
+
+    public static void uninstallPkg(String pkg) {
+        Shell.su_raw(fmt("find /data/user*/*/%s -exec umount -l {} 2>/dev/null \\;; pm uninstall %s", pkg, pkg));
+    }
+
     public static void dlAndReceive(Context context, DownloadReceiver receiver, String link, String filename) {
         if (isDownloading)
             return;
@@ -209,6 +217,10 @@ public class Utils {
         }
     }
 
+    public static File getDatabasePath(String dbName) {
+        return getDatabasePath(MagiskManager.get(), dbName);
+    }
+
     public static File getDatabasePath(Context context, String dbName) {
         return new File(context.getFilesDir().getParent() + "/databases", dbName);
     }
@@ -258,7 +270,7 @@ public class Utils {
     }
 
     public static void loadPrefs() {
-        String config = fmt("/data/user/%d/%s", MagiskManager.get().userId, Const.MANAGER_CONFIGS);
+        String config = fmt("/data/user/%d/%s", Const.USER_ID, Const.MANAGER_CONFIGS);
         List<String> ret = readFile(config);
         if (isValidShellResponse(ret)) {
             removeItem(config);
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index 50fd6b2eb..846c3adca 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -115,6 +115,8 @@
     <string name="boot_file_patch_msg">Select stock boot image dump in .img or .img.tar format</string>
     <string name="complete_uninstall">Complete Uninstall</string>
     <string name="restore_stock_boot">Restore Stock Boot</string>
+    <string name="restore_img">Restore Images</string>
+    <string name="uninstall_app">Uninstall App</string>
     <string name="restore_done">Restoration done!</string>
     <string name="restore_fail">Stock backup does not exist!</string>
     <string name="uninstall_toast">Uninstalling Magisk Manager in 5 seconds, please manually reboot afterwards</string>