manager: Add the ability to get a list of active managers

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

@@ -394,4 +394,43 @@ NativeBridgeNP(clearDynamicSign, jboolean) {
     bool result = clear_dynamic_sign();
     LogDebug("clearDynamicSign: result=%d", result);
     return result;
-}
+}
+
+NativeBridgeNP(getManagersList, jobject) {
+    struct manager_list_info info;
+    bool result = get_managers_list(&info);
+
+    if (!result) {
+        LogDebug("getManagersList: failed to get managers list");
+        return NULL;
+    }
+
+    jclass cls = GetEnvironment()->FindClass(env, "com/sukisu/ultra/Natives$ManagersList");
+    jmethodID constructor = GetEnvironment()->GetMethodID(env, cls, "<init>", "()V");
+    jobject obj = GetEnvironment()->NewObject(env, cls, constructor);
+
+    jfieldID countField = GetEnvironment()->GetFieldID(env, cls, "count", "I");
+    jfieldID managersField = GetEnvironment()->GetFieldID(env, cls, "managers", "Ljava/util/List;");
+
+    GetEnvironment()->SetIntField(env, obj, countField, (jint)info.count);
+
+    jclass arrayListCls = GetEnvironment()->FindClass(env, "java/util/ArrayList");
+    jmethodID arrayListConstructor = GetEnvironment()->GetMethodID(env, arrayListCls, "<init>", "()V");
+    jobject managersList = GetEnvironment()->NewObject(env, arrayListCls, arrayListConstructor);
+    jmethodID addMethod = GetEnvironment()->GetMethodID(env, arrayListCls, "add", "(Ljava/lang/Object;)Z");
+
+    jclass managerInfoCls = GetEnvironment()->FindClass(env, "com/sukisu/ultra/Natives$ManagerInfo");
+    jmethodID managerInfoConstructor = GetEnvironment()->GetMethodID(env, managerInfoCls, "<init>", "(II)V");
+
+    for (int i = 0; i < info.count; i++) {
+        jobject managerInfo = GetEnvironment()->NewObject(env, managerInfoCls, managerInfoConstructor,
+        (jint)info.managers[i].uid,
+                (jint)info.managers[i].signature_index);
+        GetEnvironment()->CallBooleanMethod(env, managersList, addMethod, managerInfo);
+    }
+
+    GetEnvironment()->SetObjectField(env, obj, managersField, managersList);
+
+    LogDebug("getManagersList: count=%d", info.count);
+    return obj;
+}

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

@@ -37,6 +37,7 @@
 #define CMD_HOOK_TYPE 101
 #define CMD_GET_SUSFS_FEATURE_STATUS 102
 #define CMD_DYNAMIC_SIGN 103
+#define CMD_GET_MANAGERS 104
 
 #define DYNAMIC_SIGN_OP_SET 0
 #define DYNAMIC_SIGN_OP_GET 1
@@ -173,4 +174,12 @@ bool clear_dynamic_sign() {
     struct dynamic_sign_user_config config;
     config.operation = DYNAMIC_SIGN_OP_CLEAR;
     return ksuctl(CMD_DYNAMIC_SIGN, &config, NULL);
+}
+
+bool get_managers_list(struct manager_list_info* info) {
+    if (info == NULL) {
+        return false;
+    }
+
+    return ksuctl(CMD_GET_MANAGERS, info, NULL);
 }

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

@@ -7,6 +7,7 @@
 
 #include "prelude.h"
 #include <linux/capability.h>
+#include <sys/types.h>
 
 bool become_manager(const char *);
 
@@ -105,6 +106,14 @@ struct app_profile {
     };
 };
 
+struct manager_list_info {
+    int count;
+    struct {
+        uid_t uid;
+        int signature_index;
+    } managers[2];
+};
+
 bool set_app_profile(const struct app_profile* profile);
 
 bool get_app_profile(char* key, struct app_profile* profile);
@@ -125,4 +134,6 @@ bool get_dynamic_sign(struct dynamic_sign_user_config* config);
 
 bool clear_dynamic_sign();
 
+bool get_managers_list(struct manager_list_info* info);
+
 #endif //KERNELSU_KSU_H