// // THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF // ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A // PARTICULAR PURPOSE. // // Copyright (c) Microsoft Corporation. All rights reserved // #include #include #include #include "utilities.h" #include "operations.h" void Do_Create_Synchronous(MI_Session *miSession, _In_z_ const wchar_t *namespaceName, MI_Instance *createInstance); void Do_Create_Asynchronous(MI_Session *miSession, _In_z_ const wchar_t *namespaceName, MI_Instance *createInstance); /* Do_Create() prompts the user to input the key properties to identify the object to get, then selects from * synchronous or asynchronous. */ void Do_Create(MI_Session *miSession, _In_z_ const wchar_t *namespaceName, const wchar_t *className) { wchar_t synchronous; MI_Instance *createInstance; MI_Char inputBuffer[50]; MI_Result miResult; /* Helper function to create an MI_Instance which contains the classes keys to pass into the Create operation. * This object is strongly typed, so we have all property names and types included, although only key properties * will be populated at this point. * Delete the instance once done with MI_Instance_Delete(). */ miResult = CreateInboundInstance(miSession, namespaceName, className, MI_TRUE, &createInstance); if (miResult != MI_RESULT_OK) { wprintf(L"Failed to create a keyed instance for the operation, error %s\n", MI_Result_To_String(miResult)); return; } /* Allow user to select which other property to change and set to a new value */ for (;;) { const MI_Char *elementName; MI_Value elementValue; MI_Type elementType; MI_Uint32 elementIndex; Dump_MI_Instance(createInstance, MI_FALSE, 0); /* Get the property name that user wants to change */ GetUserInputString(L"Input property name to change value, blank to continue", inputBuffer, sizeof(inputBuffer)/sizeof(inputBuffer[0]), L""); if (inputBuffer[0] == L'\0') { /* Blank property name means user wants to carry out operation now */ break; } /* Note: Doing GetElement followed by GetElementAt in order to retrieve element name pointer from instance so we can reuse the input buffer */ miResult = MI_Instance_GetElement(createInstance, inputBuffer, NULL, NULL, NULL, &elementIndex); if (miResult != MI_RESULT_OK) { wprintf(L"Failed to get property, error %s\n", MI_Result_To_String(miResult)); } miResult = MI_Instance_GetElementAt(createInstance, elementIndex, &elementName, &elementValue, &elementType, NULL); if (miResult != MI_RESULT_OK) { wprintf(L"Failed to get property, error %s\n", MI_Result_To_String(miResult)); } /* Helper function to input a new value and set it on the instance */ miResult = SetInstanceProperty(createInstance, elementName, elementType, 0, &elementValue, inputBuffer, sizeof(inputBuffer)/sizeof(inputBuffer[0]), MI_FALSE); if (miResult != MI_RESULT_OK) { wprintf(L"Failed to set property value, error %s\n", MI_Result_To_String(miResult)); } }; /* Select synchronous or asynchronous operation */ synchronous = GetUserSelection( L"How do you want the Create operation to be carried out?\n" L"\t[1] Synchronous\n" L"\t[2] Asynchronous\n" L"\t[0] back to operation choice\n", L"012"); if (synchronous == L'0') { goto errorCleanup; } switch(synchronous) { case L'1': Do_Create_Synchronous(miSession, namespaceName, createInstance); break; case L'2': Do_Create_Asynchronous(miSession, namespaceName, createInstance); break; } errorCleanup: /* Delete instance from CreateInboundInstance() call. */ if (createInstance) { miResult = MI_Instance_Delete(createInstance); if (miResult != MI_RESULT_OK) { /* Invalid parameter is the only likely error which would imply a programming error. */ wprintf(L"MI_Instance_Delete, error %s\n", MI_Result_To_String(miResult)); } } } /* Do_Create_Synchronous() carries out an instance Create operation synchronously, retrieving the result * on the same thread. The result can be retrieved on any thread, but that would be unusual for a * synchronous operation. */ void Do_Create_Synchronous(MI_Session *miSession, _In_z_ const wchar_t *namespaceName, MI_Instance *createInstance) { MI_Result miResult; MI_Result _miResult; MI_Operation miOperation = MI_OPERATION_NULL; MI_Instance *miInstance = NULL; MI_Boolean moreResults; MI_Char *errorMessage = NULL; MI_Instance *completionDetails = NULL; /* Note that the identity of the thread needs to be the same as the one the session was created on. */ /* Note, although this sample does not include the PowerShell callbacks for extended semantics, they are allowed * on synchronous operations. Allowable callbacks are: * MI_OperationCallbacks.writeError * MI_OperationCallbacks.writeMessage * MI_OperationCallbacks.writeProgress */ /* Initiate the CreateInstance operation. Synchronous results are always retrieved through a call MI_Operation_GetInstance(). * All operations must be closed with a call to MI_Operation_Close(), but all results must be processed before that. * The operation can be cancelled via MI_Operation_Cancel(), although even then all results must be consumed before the operation * is closed. */ MI_Session_CreateInstance(miSession, 0, NULL, namespaceName, createInstance, NULL, &miOperation); /* We always need to look through results until moreResults == MI_FALSE. For synchronous operations without * PowerShell callbacks it is not very likely to get more than one result from MI_Operation_GetInstance, * but it is always best to be sure, especially if you choose to add the PowerShell callbacks at a later data * and forget to update the retrieval to a loop. */ do { /* Retrieve the single instance result. remember, we need to call this API until moreResults == MI_FALSE */ _miResult = MI_Operation_GetInstance(&miOperation, &miInstance, &moreResults, &miResult, &errorMessage, &completionDetails); if (_miResult != MI_RESULT_OK) { /* If this function returns a failure it means that an invalid parameter was passed in, or the identity of the thread * is different from the identity the operation was created with. Both imply programming error. */ wprintf(L"MI_Operation_GetInstance failed, errorString=%s\n", MI_Result_To_String(_miResult)); } else { /* A result (success or failure) has been received. */ wprintf(L"------------------------------------------\n"); if (miResult != MI_RESULT_OK) { wprintf(L"Operation failed, MI_Result=%s, errorString=%s, errorDetails=\n", MI_Result_To_String(miResult), errorMessage); Dump_MI_Instance(completionDetails, MI_FALSE, 0); } else if (miInstance) { Dump_MI_Instance(miInstance, MI_FALSE, 0); } else if (moreResults == MI_TRUE) { wprintf(L"More results are due and we have no instance, we will keep trying!\n"); } wprintf(L"------------------------------------------\n"); } } while (moreResults == MI_TRUE); /* All operations must be closed. If an operation is not closed the owning session will hang until the operations * are closed fully. MI_Operation_Close will cancel an operation if it is still running, however results must be * consumed before the close can complete fully. * For synchronous operations the MI_Operation_Close() method is synchronous until the final result has been consumed * (moreResults == MI_FALSE). */ _miResult = MI_Operation_Close(&miOperation); if (_miResult != MI_RESULT_OK) { /* This API is likely to fail with invalid parameter, out of memory errors or access denied. * When an out of memory error happens, the operation will shut down as best it can. * Invalid parameter means a programming error happened. * Access denied means the security context while calling into the Close() is different from * when the operation was created. This will be a programming error and could happen if closing * from a different thread and forgetting to impersonate. */ wprintf(L"MI_Operation_Close failed, error %s\n", MI_Result_To_String(_miResult)); } } /* Do_Create_Asynchronous() carries out an instance Create operation asynchronously. The asynchronous callback * will with the final result. */ void Do_Create_Asynchronous(MI_Session *miSession, _In_z_ const wchar_t *namespaceName, MI_Instance *createInstance) { MI_Operation miOperation = MI_OPERATION_NULL; MI_OperationCallbacks miOperationCallbacks = MI_OPERATIONCALLBACKS_NULL; struct InstanceResultCallback_Context instanceCallback_Context = {0}; /* Create a notification event that we wait on until the operation has completed. * Note: This sample is demonstrating the asynchronous calling pattern for setting up * the operation, but to call a single operation and wait on a notification like * this example should really use the synchronous operations instead. */ instanceCallback_Context.asyncNotificationHandle = CreateEventW(NULL, FALSE, FALSE, NULL); if (instanceCallback_Context.asyncNotificationHandle == NULL) { wprintf(L"Failed to create a Windows Event, windows error %u\n", GetLastError()); return; } /* Add optional context information to callback structure so we can hold state * throughout the operation */ miOperationCallbacks.callbackContext = &instanceCallback_Context; /* Set instance callback function. This will keep being called until it is * called with moreResults==MI_FALSE. * It is this callback that puts instance operations into asyncronous mode. */ miOperationCallbacks.instanceResult = InstanceResultCallback; /* Optional callback (allowed for synchronous operations also), that receive * non-terminating operation error reports from a provider. */ miOperationCallbacks.writeError = WriteErrorCallback; /* Optional callback (allowed for synchronous operations also), that receive * non-terminating operation error reports from a provider. */ miOperationCallbacks.writeMessage = WriteMessageCallback; /* Optional callback (allowed for synchronous operations also), that receive * non-terminating operation error reports from a provider. */ miOperationCallbacks.writeProgress = WriteProgressCallback; /* Start the operation */ MI_Session_CreateInstance(miSession, 0, NULL, namespaceName, createInstance, &miOperationCallbacks, &miOperation); /* InstanceResultCallback() will always be called back for asyncronous operations, so wait for it to finish */ WaitForSingleObject(instanceCallback_Context.asyncNotificationHandle, INFINITE); CloseHandle(instanceCallback_Context.asyncNotificationHandle); /* Final miResult is here if needed: instanceCallback_Context.finalResult * Any data from the callback cannot be accessed here because the lifetime of the data is * only valid in the callback and until the operation is closed. * In this sample the operation handle is closed inside the instance callback. */ }