Add mount namespace options

app/src/main/java/com/topjohnwu/magisk/MagiskManager.java

@@ -77,6 +77,7 @@ public class MagiskManager extends Application {
     public int multiuserMode;
     public int suResponseType;
     public int suNotificationType;
+    public int suNamespaceMode;
 
     // Global resources
     public SharedPreferences prefs;
@@ -137,6 +138,7 @@ public class MagiskManager extends Application {
                 .putString("su_notification", String.valueOf(suNotificationType))
                 .putString("su_access", String.valueOf(suAccessState))
                 .putString("multiuser_mode", String.valueOf(multiuserMode))
+                .putString("mnt_ns", String.valueOf(suNamespaceMode))
                 .putString("busybox_version", BUSYBOX_VERSION)
                 .apply();
         // Add busybox to PATH
@@ -164,6 +166,7 @@ public class MagiskManager extends Application {
         if (isSuClient) {
             suAccessState = suDB.getSettings(SuDatabaseHelper.ROOT_ACCESS, 3);
             multiuserMode = suDB.getSettings(SuDatabaseHelper.MULTIUSER_MODE, 0);
+            suNamespaceMode = suDB.getSettings(SuDatabaseHelper.MNT_NS, 1);
         }
     }
 

app/src/main/java/com/topjohnwu/magisk/SettingsActivity.java

@@ -60,7 +60,7 @@ public class SettingsActivity extends Activity {
         private SharedPreferences prefs;
         private PreferenceScreen prefScreen;
 
-        private ListPreference suAccess, autoRes, suNotification, requestTimeout, multiuserMode;
+        private ListPreference suAccess, autoRes, suNotification, requestTimeout, multiuserMode, namespaceMode;
         private MagiskManager magiskManager;
 
         @Override
@@ -80,6 +80,7 @@ public class SettingsActivity extends Activity {
             requestTimeout = (ListPreference) findPreference("su_request_timeout");
             suNotification = (ListPreference) findPreference("su_notification");
             multiuserMode = (ListPreference) findPreference("multiuser_mode");
+            namespaceMode = (ListPreference) findPreference("mnt_ns");
 
             setSummary();
 
@@ -182,6 +183,11 @@ public class SettingsActivity extends Activity {
                 case "multiuser_mode":
                     magiskManager.multiuserMode = Utils.getPrefsInt(prefs, "multiuser_mode", 0);
                     magiskManager.suDB.setSettings(SuDatabaseHelper.MULTIUSER_MODE, magiskManager.multiuserMode);
+                    break;
+                case "mnt_ns":
+                    magiskManager.suNamespaceMode = Utils.getPrefsInt(prefs, "mnt_ns", 1);
+                    magiskManager.suDB.setSettings(SuDatabaseHelper.MNT_NS, magiskManager.suNamespaceMode);
+                    break;
                 case "su_request_timeout":
                     magiskManager.suRequestTimeout = Utils.getPrefsInt(prefs, "su_request_timeout", 10);
                     break;
@@ -212,6 +218,8 @@ public class SettingsActivity extends Activity {
                     getString(R.string.request_timeout_summary, prefs.getString("su_request_timeout", "10")));
             multiuserMode.setSummary(getResources()
                     .getStringArray(R.array.multiuser_summary)[magiskManager.multiuserMode]);
+            namespaceMode.setSummary(getResources()
+                    .getStringArray(R.array.namespace_summary)[magiskManager.suNamespaceMode]);
         }
     }
 

app/src/main/java/com/topjohnwu/magisk/database/SuDatabaseHelper.java

@@ -21,6 +21,7 @@ public class SuDatabaseHelper extends SQLiteOpenHelper {
 
     public static final String ROOT_ACCESS = "root_access";
     public static final String MULTIUSER_MODE = "multiuser_mode";
+    public static final String MNT_NS = "mnt_ns";
 
     private static final int DATABASE_VER = 2;
     private static final String POLICY_TABLE = "policies";

app/src/main/res/values/arrays.xml

@@ -61,4 +61,16 @@
         <item>@string/user_indepenent_summary</item>
     </string-array>
 
+    <string-array name="namespace">
+        <item>@string/settings_ns_global</item>
+        <item>@string/settings_ns_requester</item>
+        <item>@string/settings_ns_isolate</item>
+    </string-array>
+
+    <string-array name="namespace_summary">
+        <item>@string/global_summary</item>
+        <item>@string/requester_summary</item>
+        <item>@string/isolate_summary</item>
+    </string-array>
+
 </resources>

app/src/main/res/values/strings.xml

@@ -175,6 +175,14 @@
     <string name="user_indepenent_summary">Each user has its own separate root rules</string>
     <string name="multiuser_hint_owner_request">A request has been sent to the device owner. Please switch to the owner and grant the permission</string>
 
+    <string name="mount_namespace_mode">Mount Namespace Mode</string>
+    <string name="settings_ns_global">Global Namespace</string>
+    <string name="settings_ns_requester">Requester Namespace</string>
+    <string name="settings_ns_isolate">Isolated Namespace</string>
+    <string name="global_summary">All root sessions use the global mount namespace</string>
+    <string name="requester_summary">Root sessions will use its requester\'s namespace</string>
+    <string name="isolate_summary">Each root session will have its own isolated namespace</string>
+
     <string name="settings_development_category">App Development</string>
     <string name="settings_developer_logging_title">Enable advanced debug logging</string>
     <string name="settings_developer_logging_summary">Check this to enable verbose logging</string>

app/src/main/res/xml/app_settings.xml

@@ -58,6 +58,12 @@
             android:entries="@array/multiuser_mode"
             android:entryValues="@array/value_array" />
 
+        <ListPreference
+            android:key="mnt_ns"
+            android:title="@string/mount_namespace_mode"
+            android:entries="@array/namespace"
+            android:entryValues="@array/value_array" />
+
         <ListPreference
             android:key="su_auto_response"
             android:title="@string/auto_response"