From fa851800cf97d1a3d30a7a147877005dc48721ff Mon Sep 17 00:00:00 2001
From: Svet Ganov <svetoslavganov@google.com>
Date: Tue, 27 Mar 2018 17:17:46 -0700
Subject: Add API to query if a UID is active

Test: cts-tradefed run cts-dev -m CtsCameraTestCases

Bug: 72863398

Change-Id: I8e5021f2ef4cd77fc89ae3b47cc32ad6913da0d6
---
 libs/binder/ActivityManager.cpp               |  9 +++++++++
 libs/binder/IActivityManager.cpp              | 12 ++++++++++++
 libs/binder/include/binder/ActivityManager.h  |  1 +
 libs/binder/include/binder/IActivityManager.h |  4 +++-
 4 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/libs/binder/ActivityManager.cpp b/libs/binder/ActivityManager.cpp
index 9adac26a31..2728f35408 100644
--- a/libs/binder/ActivityManager.cpp
+++ b/libs/binder/ActivityManager.cpp
@@ -80,6 +80,15 @@ void ActivityManager::unregisterUidObserver(const sp<IUidObserver>& observer)
     }
 }
 
+bool ActivityManager::isUidActive(const uid_t uid, const String16& callingPackage)
+{
+    sp<IActivityManager> service = getService();
+    if (service != NULL) {
+        return service->isUidActive(uid, callingPackage);
+    }
+    return false;
+}
+
 status_t ActivityManager::linkToDeath(const sp<IBinder::DeathRecipient>& recipient) {
     sp<IActivityManager> service = getService();
     if (service != NULL) {
diff --git a/libs/binder/IActivityManager.cpp b/libs/binder/IActivityManager.cpp
index b7a5fd99f6..428db4d579 100644
--- a/libs/binder/IActivityManager.cpp
+++ b/libs/binder/IActivityManager.cpp
@@ -78,6 +78,18 @@ public:
          data.writeStrongBinder(IInterface::asBinder(observer));
          remote()->transact(UNREGISTER_UID_OBSERVER_TRANSACTION, data, &reply);
     }
+
+    virtual bool isUidActive(const uid_t uid, const String16& callingPackage)
+    {
+         Parcel data, reply;
+         data.writeInterfaceToken(IActivityManager::getInterfaceDescriptor());
+         data.writeInt32(uid);
+         data.writeString16(callingPackage);
+         remote()->transact(IS_UID_ACTIVE_TRANSACTION, data, &reply);
+         // fail on exception
+         if (reply.readExceptionCode() != 0) return false;
+         return reply.readInt32() == 1;
+    }
 };
 
 // ------------------------------------------------------------------------------------
diff --git a/libs/binder/include/binder/ActivityManager.h b/libs/binder/include/binder/ActivityManager.h
index 397382f825..3090cae12a 100644
--- a/libs/binder/include/binder/ActivityManager.h
+++ b/libs/binder/include/binder/ActivityManager.h
@@ -50,6 +50,7 @@ public:
                              const int32_t cutpoint,
                              const String16& callingPackage);
     void unregisterUidObserver(const sp<IUidObserver>& observer);
+    bool isUidActive(const uid_t uid, const String16& callingPackage);
 
     status_t linkToDeath(const sp<IBinder::DeathRecipient>& recipient);
     status_t unlinkToDeath(const sp<IBinder::DeathRecipient>& recipient);
diff --git a/libs/binder/include/binder/IActivityManager.h b/libs/binder/include/binder/IActivityManager.h
index bac2a99a8f..6607c0e8e6 100644
--- a/libs/binder/include/binder/IActivityManager.h
+++ b/libs/binder/include/binder/IActivityManager.h
@@ -35,11 +35,13 @@ public:
                                      const int32_t cutpoint,
                                      const String16& callingPackage) = 0;
     virtual void unregisterUidObserver(const sp<IUidObserver>& observer) = 0;
+    virtual bool isUidActive(const uid_t uid, const String16& callingPackage) = 0;
 
     enum {
         OPEN_CONTENT_URI_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
         REGISTER_UID_OBSERVER_TRANSACTION,
-        UNREGISTER_UID_OBSERVER_TRANSACTION
+        UNREGISTER_UID_OBSERVER_TRANSACTION,
+        IS_UID_ACTIVE_TRANSACTION
     };
 };
 
-- 
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