Better support for low API levels

app-core/build.gradle

@@ -15,7 +15,7 @@ dependencies {
     api project(':signing')
     api 'org.kamranzafar:jtar:2.3'
 
-    def libsuVersion = 'd99f481563'
+    def libsuVersion = '2.3.0'
     api "com.github.topjohnwu.libsu:core:${libsuVersion}"
     api "com.github.topjohnwu.libsu:io:${libsuVersion}"
 }

app-core/src/main/java/com/topjohnwu/magisk/App.java

@@ -1,5 +1,6 @@
 package com.topjohnwu.magisk;
 
+import android.app.Application;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.res.Configuration;
@@ -12,12 +13,11 @@ import com.topjohnwu.magisk.database.RepoDatabaseHelper;
 import com.topjohnwu.magisk.utils.LocaleManager;
 import com.topjohnwu.magisk.utils.RootUtils;
 import com.topjohnwu.net.Networking;
-import com.topjohnwu.superuser.ContainerApp;
 import com.topjohnwu.superuser.Shell;
 
 import java.util.concurrent.ThreadPoolExecutor;
 
-public class App extends ContainerApp {
+public class App extends Application {
 
     public static App self;
     public static ThreadPoolExecutor THREAD_POOL;

app-core/src/main/res/raw/utils.sh

@@ -7,11 +7,14 @@ env_check() {
 
 fix_env() {
   cd /data/adb/magisk
+  local OLDPATH="$PATH"
+  PATH=/sbin:/system/bin:/vendor/bin
   sh update-binary extract
+  PATH="$OLDPATH"
+  ./busybox rm -f /sbin/.magisk/busybox/*
+  /sbin/.magisk/mirror/bin/busybox --install -s /sbin/.magisk/busybox
   rm -f update-binary magisk.apk
   cd /
-  rm -rf /sbin/.magisk/busybox/*
-  /sbin/.magisk/mirror/bin/busybox --install -s /sbin/.magisk/busybox
 }
 
 direct_install() {

app/src/full/java/com/topjohnwu/magisk/SplashActivity.java

@@ -23,6 +23,22 @@ public class SplashActivity extends BaseActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        Shell.getShell(shell -> {
+            if (Config.magiskVersionCode > 0 &&
+                    Config.magiskVersionCode < Const.MAGISK_VER.MIN_SUPPORT) {
+                new AlertDialog.Builder(this)
+                        .setTitle(R.string.unsupport_magisk_title)
+                        .setMessage(R.string.unsupport_magisk_message)
+                        .setNegativeButton(R.string.ok, null)
+                        .setOnDismissListener(dialog -> finish())
+                        .show();
+            } else {
+                initAndStart();
+            }
+        });
+    }
+
+    private void initAndStart() {
         String pkg = Config.get(Config.Key.SU_MANAGER);
         if (pkg != null && getPackageName().equals(BuildConfig.APPLICATION_ID)) {
             Config.remove(Config.Key.SU_MANAGER);
@@ -36,19 +52,6 @@ public class SplashActivity extends BaseActivity {
             } catch (PackageManager.NameNotFoundException ignored) {}
         }
 
-        if (Config.magiskVersionCode > 0 && Config.magiskVersionCode < Const.MAGISK_VER.MIN_SUPPORT) {
-            new AlertDialog.Builder(this)
-                    .setTitle(R.string.unsupport_magisk_title)
-                    .setMessage(R.string.unsupport_magisk_message)
-                    .setNegativeButton(R.string.ok, null)
-                    .setOnDismissListener(dialog -> finish())
-                    .show();
-        } else {
-            initAndStart();
-        }
-    }
-
-    private void initAndStart() {
         // Dynamic detect all locales
         LocaleManager.loadAvailableLocales(R.string.app_changelog);
 

app/src/full/java/com/topjohnwu/magisk/dialogs/EnvFixDialog.java

@@ -2,14 +2,19 @@ package com.topjohnwu.magisk.dialogs;
 
 import android.app.Activity;
 import android.app.ProgressDialog;
+import android.content.Intent;
 import android.widget.Toast;
 
+import com.topjohnwu.magisk.ClassMap;
 import com.topjohnwu.magisk.R;
+import com.topjohnwu.magisk.SplashActivity;
 import com.topjohnwu.magisk.tasks.MagiskInstaller;
 import com.topjohnwu.magisk.utils.Utils;
 import com.topjohnwu.superuser.Shell;
 import com.topjohnwu.superuser.io.SuFile;
 
+import java.io.IOException;
+
 import androidx.annotation.NonNull;
 
 public class EnvFixDialog extends CustomAlertDialog {
@@ -35,6 +40,17 @@ public class EnvFixDialog extends CustomAlertDialog {
                 protected void onResult(boolean success) {
                     pd.dismiss();
                     Utils.toast(success ? R.string.setup_done : R.string.setup_fail, Toast.LENGTH_LONG);
+                    if (success) {
+                        // Relaunch the app
+                        try {
+                            Shell.getShell().close();
+                        } catch (IOException ignored) {}
+                        Intent intent = new Intent(activity, ClassMap.get(SplashActivity.class));
+                        intent.addFlags(Intent.FLAG_ACTIVITY_TASK_ON_HOME | Intent.FLAG_ACTIVITY_NEW_TASK);
+                        activity.startActivity(intent);
+                        activity.finish();
+                    }
+
                 }
             }.exec();
         });

scripts/update_binary.sh

@@ -1,11 +1,10 @@
 #!/sbin/sh
 X86_CNT=__X86_CNT__
 extract_bb() {
-  case `uname -m` in
-    x*) dd if="$0" of="$BBBIN" bs=1024 skip=1 count=$X86_CNT ;;
-    *)  dd if="$0" of="$BBBIN" bs=1024 skip=$(($X86_CNT + 1));;
-  esac
+  touch "$BBBIN"
   chmod 755 "$BBBIN"
+  dd if="$0" of="$BBBIN" bs=1024 skip=$(($X86_CNT + 1))
+  "./$BBBIN" >/dev/null || dd if="$0" of="$BBBIN" bs=1024 skip=1 count=$X86_CNT
 }
 setup_bb() {
   BBDIR=$TMPDIR/bin