How can I access RSOP data using C++ and WMI?
rprasad1
retrieved.
#ifndef _WIN32_DCOM
#define _WIN32_DCOM
#endif
#include <windows.h>
#include <objbase.h>
#include <atlbase.h>
#include <iostream>
#include <wbemidl.h>
#include <comutil.h>
int main( int argc, char** argv )
{
HRESULT hr = CoInitializeEx( NULL, COINIT_MULTITHREADED );
if ( FAILED( hr ) )
{
std::cerr << "COM initialization failed" << std::endl;
return -1;
}
// setup process-wide security context
hr = CoInitializeSecurity( NULL, // we're not a server
-1, // we're not a server
NULL, // dito
NULL, // reserved
RPC_C_AUTHN_LEVEL_DEFAULT, // let DCOM decide
RPC_C_IMP_LEVEL_IMPERSONATE,
NULL,
EOAC_NONE,
NULL );
if ( FAILED( hr ) )
{
std::cerr << "Security initialization failed" << std::endl;
return -1;
}
int result = 0;
// we're going to use CComPtr<>s, whose lifetime must end BEFORE
CoUnitialize is called
{
// connect to WMI
CComPtr< IWbemLocator > locator;
hr = CoCreateInstance( CLSID_WbemAdministrativeLocator, NULL,
CLSCTX_INPROC_SERVER,
IID_IWbemLocator, reinterpret_cast< void** >( &locator ) );
if ( FAILED( hr ) )
{
std::cerr << "Instantiation of IWbemLocator failed" << std::endl;
return -1;
}
// connect to local service with current credentials
CComPtr< IWbemServices > service;
//hr = locator->ConnectServer( L"ROOT\\CIMV2", NULL, NULL, NULL,
// WBEM_FLAG_CONNECT_USE_MAX_WAIT,
// NULL, NULL, &service
// );
hr = locator->ConnectServer( L"ROOT\\RSOP\\Computer", NULL, NULL, NULL,
WBEM_FLAG_CONNECT_USE_MAX_WAIT,
NULL, NULL, &service
);
if ( SUCCEEDED( hr ) )
{
// execute a query;
CComPtr< IEnumWbemClassObject > enumerator;
hr = service->ExecQuery( L"WQL", L"SELECT * FROM
RSOP_SecuritySettingNumeric",WBEM_FLAG_FORWARD_ONLY, NULL, &enumerator );
//hr = service->ExecQuery( L"WQL", L"SELECT * FROM
Win32_OperatingSystem",WBEM_FLAG_FORWARD_ONLY, NULL, &enumerator );
if ( SUCCEEDED( hr ))
{
CComPtr< IWbemClassObject > ping = NULL;
ULONG retcnt;
hr = enumerator->Next( WBEM_INFINITE, 1L, &ping, &retcnt );
if ( SUCCEEDED( hr ) )
{
if ( retcnt > 0 )
{
// query returns a result
_variant_t var_val;
//hr = ping->Get( L"Name", 0, &var_val, NULL, NULL );
hr = ping->Get( L"presedence", 0, &var_val, NULL, NULL );
if ( SUCCEEDED( hr ) )
{
int str = var_val;
std::cout << "Presedence: " << str << std::endl;
//std::wcout << " OS Name : " << var_val.bstrVal << std::endl;
VariantClear(&var_val);
}
else
{
std::cerr << "IWbemClassObject::Get failed" << std::endl;
result = -1;
}
}
else
{
std::cout << "Enumeration empty" << std::endl;
}
}
else
{
std::cerr << "Error in iterating through enumeration" << std::cerr;
result = -1;
}
}
else
{
std::cerr << "Query failed" << std::endl;
result = -1;
}
}
else
{
std::cerr << "Couldn't connect to service" << std::endl;
result = -1;
}
}
CoUninitialize();
return result;
}