manager: Add support to disable sucompat mode.

manager/app/src/main/cpp/jni.cc

@@ -295,4 +295,14 @@ extern "C"
 JNIEXPORT jboolean JNICALL
 Java_me_weishu_kernelsu_Natives_uidShouldUmount(JNIEnv *env, jobject thiz, jint uid) {
     return uid_should_umount(uid);
+}
+extern "C"
+JNIEXPORT jboolean JNICALL
+Java_me_weishu_kernelsu_Natives_isSuEnabled(JNIEnv *env, jobject thiz) {
+    return is_su_enabled();
+}
+extern "C"
+JNIEXPORT jboolean JNICALL
+Java_me_weishu_kernelsu_Natives_setSuEnabled(JNIEnv *env, jobject thiz, jboolean enabled) {
+    return set_su_enabled(enabled);
 }

manager/app/src/main/cpp/ksu.cc

@@ -27,6 +27,8 @@
 
 #define CMD_IS_UID_GRANTED_ROOT 12
 #define CMD_IS_UID_SHOULD_UMOUNT 13
+#define CMD_IS_SU_ENABLED 14
+#define CMD_ENABLE_SU 15
 
 static bool ksuctl(int cmd, void* arg1, void* arg2) {
     int32_t result = 0;
@@ -84,3 +86,14 @@ bool set_app_profile(const app_profile *profile) {
 bool get_app_profile(p_key_t key, app_profile *profile) {
     return ksuctl(CMD_GET_APP_PROFILE, (void*) profile, nullptr);
 }
+
+bool set_su_enabled(bool enabled) {
+    return ksuctl(CMD_ENABLE_SU, (void*) enabled, nullptr);
+}
+
+bool is_su_enabled() {
+    bool enabled = true;
+    // if ksuctl failed, we assume su is enabled, and it cannot be disabled.
+    ksuctl(CMD_IS_SU_ENABLED, &enabled, nullptr);
+    return enabled;
+}

manager/app/src/main/cpp/ksu.h

@@ -79,4 +79,8 @@ bool set_app_profile(const app_profile *profile);
 
 bool get_app_profile(p_key_t key, app_profile *profile);
 
+bool set_su_enabled(bool enabled);
+
+bool is_su_enabled();
+
 #endif //KERNELSU_KSU_H