I want to set some config for group policy, using code found on the internet.
::CoInitialize(NULL);
IGroupPolicyObject* pObj = NULL;
hr = CoCreateInstance(CLSID_GroupPolicyObject, NULL, CLSCTX_INPROC_SERVER, IID_IGroupPolicyObject, (LPVOID *)&pObj);
if (FAILED(hr))
{
// hr = print
break;
}
As I run this in my win10 it works.But when I use the same code in win7, CoCreateInstance returns 0x800736B1 and IGroupPolicyObject instantiation failed.
I thought gpedit.dll version is too old, but I run in server2008 it works.
And I follow the errcode using sxstrace.exe, the log shows:
INFO: Parsing Manifest File C:\Windows\System32\GPEdit.dll. INFO:
Manifest Definition Identity is (null). ERROR: Activation Context
generation failed. End Activation Context Generation.
Not useful for me.
Maybe some services is not running? I don't know.
Any thoughts much thanks
Related
IOCreatePlugInInterfaceForService failed w/ kIOReturnNoResources/0xe00002be
I am rewriting old FireWire based command line utility into XPCService. I need some help about an IOKit function.
Following part is to get IOCFPlugInInterface for FireWireAVCLibUnit.(almost same as original code; basic idea comes from legacy simpleAVC samplecode).
When I call IOCreatePlugInInterfaceForService() in the XPCService, it always failed returning 0xe00002be = kIOReturnNoResources in IOReturn.h.
I have confirmed no sandbox, no hardened for the XPC Service.
Original command line utility works perfectly on macOS 10.14 though, would you someone give me a hint on this topic?
CFDictionaryRef dict = CFDictionaryCreateCopy(kCFAllocatorDefault, self.dict);
kern_return_t result = IOServiceGetMatchingServices(kIOMasterPortDefault, dict, &serviceIterator);
if (result == KERN_SUCCESS && serviceIterator != IO_OBJECT_NULL) {
while ((service = IOIteratorNext(serviceIterator)) != IO_OBJECT_NULL) {
SInt32 score = 0;
kern_return_t result = IOCreatePlugInInterfaceForService(service,
kIOFireWireAVCLibUnitTypeID,
kIOCFPlugInInterfaceID,
&interface,
&score);
if (result != KERN_SUCCESS) continue;
// result 0xe00002be = kIOReturnNoResources in IOReturn.h
break;
}
}
Additional details
I have find IOCFPlugIn.c in opensource.apple.com. After basic verification,
- IOCreatePlugInInterfaceForService() failed to IOCFPlugIn->Start() .
(*iunknown)->QueryInterface(iunknown, CFUUIDGetUUIDBytes(interfaceType),
(LPVOID *)&interface);
<snip>
kr = (*interface)->Probe(interface, plist, service, &score);
<snip>
haveOne = (kIOReturnSuccess == (*interface)->Start(interface, plist, service));
Probe() returned kIOReturnSuccess though,
Start() failed w/ kIOReturnNoDevice = 0xe00002c0. and haveOne = false.
Finally IOCreatePlugInInterfaceForService() returned kIOReturnNoResources = 0xe00002be.
Is this related to some security feature on macOS?
MODIFIED
I have found hardened runtime with Camera access was rejected FireWireAVCLibUnit (tccd shows error).
Even if no sandbox, no hardened for the XPC Service in Xcode was checked, XPCservice is handled via sandbox. (macOS 10.14.6 + Xcode 10.3)
I would appreciate if you have an advice.
I have found the solution.
- Add NSCameraUsageDescription in Info.plist, and IOFireWireAVCUserClient will work.
- If sandboxed, com.apple.security.device.firewire is also required.
Even if capabilities-sandbox is off, tccd verify info.plist.
If “Privacy - Camera Usage Description” is not available, sandboxd reject to use IOFireWireAVCUserClient device.
Information Property List Key Reference/Cocoa Keys
as shown in title, i search on google for this question, but there seems that no way get serial number via WPD(Windows Portable Device) api, and in MSDN, i found the WPD_DEVICE_SERIAL_NUMBER property of Portable Device, can anyone tell me how to get this property using wpd api?
The C++ sample can be found here and here
Bit of a process. Basic steps are as follows:
Get and populate a IPortableDeviceValues of your client info
// Create our client information collection
ThrowIfFailed(CoCreateInstance(
CLSID_PortableDeviceValues,
nullptr,
CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&clientInfo)));
// We have to provide at the least our name, version, revision
ThrowIfFailed(clientInfo->SetStringValue(
WPD_CLIENT_NAME,
L"My super cool WPD client"));
ThrowIfFailed(clientInfo->SetUnsignedIntegerValue(
WPD_CLIENT_MAJOR_VERSION,
1));
ThrowIfFailed(clientInfo->SetUnsignedIntegerValue(
WPD_CLIENT_MINOR_VERSION,
0));
ThrowIfFailed(clientInfo->SetUnsignedIntegerValue(
WPD_CLIENT_REVISION,
1));
Get an IPortableDevice with CoCreateInstance
// A WPD device is represented by an IPortableDevice instance
ThrowIfFailed(CoCreateInstance(
CLSID_PortableDevice,
nullptr,
CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&device)));
Connect to the device using IPortableDevice::Open, passing the device's ID and the above client info
device->Open(deviceId.c_str(), clientInfo);
Get the device's IPortableDeviceContent using IPortableDevice::Content
CComPtr<IPortableDeviceContent> retVal;
ThrowIfFailedWithMessage(
device.Content(&retVal),
L"! Failed to get IPortableDeviceContent from IPortableDevice");
Get the content's IPortableDeviceProperties using IPortableDeviceContent::Properties
CComPtr<IPortableDeviceProperties> retVal;
ThrowIfFailedWithMessage(
content.Properties(&retVal),
L"! Failed to get IPortableDeviceProperties from IPortableDeviceContent");
Get the properties' IPortableDeviceValues using IPortableDeviceProperties::GetValues, passing "DEVICE" for pszObjectID and nullptr for pKeys
CComPtr<IPortableDeviceValues> retVal;
ThrowIfFailedWithMessage(
properties.GetValues(objectId.c_str(), nullptr, &retVal),
L"! Failed to get IPortableDeviceValues from IPortableDeviceProperties");
Get the serial number from the values using IPortableDeviceValues::GetStringValue, passing WPD_DEVICE_SERIAL_NUMBER for key
propertyKey = WPD_DEVICE_SERIAL_NUMBER;
LPWSTR value = nullptr;
ThrowIfFailedWithMessage(
values.GetStringValue(propertyKey, &value),
L"! Failed to get string value from IPortableDeviceValues");
propertyValue = value;
if (value != nullptr)
{
CoTaskMemFree(value);
}
By no means a complete listing, sorry. The ThrowIf* functions are just basic helpers I wrote to go from checking HRESULTs to throwing exceptions. Hopefully this points you in the right direction.
Additional references:
The dimeby8 blog
WPD Application Programming Interface
I'm trying to change the value of a flag in an IPropertyStore. However, my code seems to behave the same way, regardless of the value of the flag.
Is this because my code doesn't call IPropertyStore_Commit after changing the flag?
I did try to call the method, however I got an error code 0x80004001 which means "not implemented". Hence, the second part of my question: why isn't it implemented?
In more detail, I'm working on a Java softphone which makes use of WASAPI (via the JNI) for some of the audio processing. The native code is written in C.
Having recently enabled AES (Acoustic Echo Suppression), I've found that AGC (Automatic Gain Control) is also enabled. I'm trying to disable AGC by setting the MFPKEY_WMAAECMA_FEATR_AGC key on an IPropertyStore object. However, whatever I set the value to be makes no difference.
The relevant code snippets are as follows:
// Obtain the property store
void *pvObject;
HRESULT hr = IMediaObject_QueryInterface((IMediaObject *) thiz, &iid_, &pvObject);
// Do some checking that the store is valid...
// Set the value of the AGC key:
PROPVARIANT propvar = ...
IPropertyStore_SetValue((IPropertyStore *)pvObject, (REFPROPERTYKEY) key, &propvar);
// Call commit - fails, with 0x80004001:
HRESULT hr = IPropertyStore_Commit((IPropertyStore *)pvObject);
A couple of issues:
I'm not sure what thiz actually is; I'm pretty sure it's not an IMediaObject interface.
You can't just cast from IMediaObject to IPropertyStore; you have to QueryInterface the IMediaObject pointer for IPropertyStore.
You shouldn't need to call IPropertyStore_Commit; at least, not for setting the AGC key.
When you're calling IPropertyStore_SetValue, make sure the PROPVARIANT is initialized correctly. MFPKEY_WMAAECMA_FEATR_AGC is a BOOLEAN property, so your code needs to look something like this:
IMediaObject *pvObject;
HRESULT hr = IUnknown_QueryInterface((IUnknown*) thiz, IID_PPV_ARGS(&pvObject));
if (SUCCEEDED(hr))
{
IPropertyStore* pvPropStore;
hr = IMediaObject_QueryInterface(pvObject, IID_PPV_ARGS(&pvPropStore));
if (SUCCEEDED(hr))
{
PROPVARIANT pvFeature;
PropVariantInit(&pvFeature);
pvFeature.vt = VT_BOOL;
pvFeature.boolVal = fValue ? VBTRUE : VBFALSE;
hr = IPropertyStore_SetValue(pvPropStore, MFPKEY_WMAAECMA_FEATR_AGC, pvFeature);
}
}
When querying iis7 config data it fails when running within the worker process and ok in console application.
COSERVERINFO csiMachineName;
csiMachineName.pAuthInfo = NULL;
csiMachineName.dwReserved1 = 0;
csiMachineName.dwReserved2 = 0;
csiMachineName.pwszName = L"localhost";
hr = CoGetClassObject(
__uuidof( AppHostAdminManager ),
CLSCTX_SERVER,
&csiMachineName,
IID_IClassFactory,
(void**) &(pClassFactory.GetInterfacePtr()));
hr = pClassFactory->CreateInstance(
NULL, __uuidof( IAppHostAdminManager ), (void **) &(iisAdmin.GetInterfacePtr()));
bstr_t bstrSectionName("system.applicationHost/applicationPools");
bstr_t bstrPath("MACHINE/WEBROOT/APPHOST");
hr = iisAdmin->GetAdminSection(bstrSectionName, bstrPath, &(sitesElement.GetInterfacePtr()) );
hr = sitesElement->get_Collection(&(sitesElementCollection.GetInterfacePtr()));
DWORD sitesCount = 0;
hr = sitesElementCollection->get_Count(&sitesCount);
and sitesCount is 0 when this code run in IIS module but ok when running in windows application.
any idea?
Most likely the issue is that the Application Pool identity doesn't have proper rights to administrate IIS. Try setting the application pool identity to the same as the user you use when running the console app and see if that makes a difference. If it does, you may need to set this code in a separate AppPool running as an elevated user to let the code run while limiting what code runs as the elevated user.
Using the method described in the MSDN for registering a Windows Service (ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.WIN32COM.v10.en/dllproc/base/createservice.htm) and using similar code to the supplied example:
schService = CreateService(
schSCManager, // SCManager database
TEXT("Sample_Srv"), // name of service
lpszDisplayName, // service name to display
SERVICE_ALL_ACCESS, // desired access
SERVICE_WIN32_OWN_PROCESS, // service type
SERVICE_DEMAND_START, // start type
SERVICE_ERROR_NORMAL, // error control type
szPath, // path to service's binary
NULL, // no load ordering group
NULL, // no tag identifier
NULL, // no dependencies
NULL, // LocalSystem account
NULL); // no password
My issue is that, although the service is registered and works perfectly, in msconfig.msc the service has 'Take No Action' in the recovery options. Is there a way I can programatically change this so that upon failure it restarts?
Take a look at ChangeServiceConfig2 for setting those types of service options.
You might be able to set this using the sc command.
sc failure "servicename" reset= 0 actions= restart/30000////
This will tell it to reset the failure counter after 0 days (never), and restart after 30 seconds on the first failure with no action for the second and later failures.
Performed further digging in the MSDN - it wasn't particularly easy to find but it appears
ChangeServiceConfig2 (http://msdn.microsoft.com/en-us/library/ms681988(VS.85).aspx)
BOOL WINAPI ChangeServiceConfig2(
__in SC_HANDLE hService,
__in DWORD dwInfoLevel,
__in_opt LPVOID lpInfo
);
When param dwInfoLevel is SERVICE_CONFIG_FAILURE_ACTIONS (2) then the lpInfo parameter is a pointer to a SERVICE_FAILURE_ACTIONS structure.
SERVICE_FAILURE_ACTIONS Structure
http://msdn.microsoft.com/en-us/library/ms685939(VS.85).aspx
Where you can configure the 'optional' service settings as you wish.