215 lines
9.3 KiB
C
215 lines
9.3 KiB
C
//
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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// PARTICULAR PURPOSE.
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//
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// Copyright (c) Microsoft Corporation. All rights reserved
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//
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#include <windows.h>
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#include <strsafe.h>
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#include <mi.h>
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#include "utilities.h"
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#include "operations.h"
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void Do_Enumerate_Synchronous(MI_Session *miSession, _In_z_ const wchar_t *namespaceName, const wchar_t *className, MI_Boolean keysOnly);
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void Do_Enumerate_Asynchronous(MI_Session *miSession, _In_z_ const wchar_t *namespaceName, const wchar_t *className, MI_Boolean keysOnly);
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/* Do_Enumerate() prompts the user for some options, then selects from synchronous or asynchronous. */
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void Do_Enumerate(MI_Session *miSession, _In_z_ const wchar_t *namespaceName, const wchar_t *className)
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{
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wchar_t synchronous;
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wchar_t keysOnly;
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keysOnly = GetUserSelection(
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L"How do you want the Enumerate operation to return property keys only?\n"
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L"\t[1] All instance properties\n"
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L"\t[2] Instance key properties only\n"
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L"\t[0] back to operation choice\n",
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L"012");
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if (keysOnly == L'0')
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{
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return;
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}
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synchronous = GetUserSelection(
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L"How do you want the Enumerate operation to be carried out?\n"
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L"\t[1] Synchronous\n"
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L"\t[2] Asynchronous\n"
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L"\t[0] back to operation choice\n",
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L"012");
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if (synchronous == L'0')
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{
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return;
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}
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switch(synchronous)
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{
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case L'1':
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Do_Enumerate_Synchronous(miSession, namespaceName, className, keysOnly==L'2' ? MI_TRUE : MI_FALSE);
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break;
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case L'2':
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Do_Enumerate_Asynchronous(miSession, namespaceName, className, keysOnly==L'2' ? MI_TRUE : MI_FALSE);
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break;
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}
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}
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/* Do_Enumerate_Synchronous() carries out an instance Enumerate operation synchronously, retrieving all results
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* on the same thread. The results can be retrieved on any thread, but that would be unusual for a
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* synchronous operation.
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*/
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void Do_Enumerate_Synchronous(MI_Session *miSession, _In_z_ const wchar_t *namespaceName, const wchar_t *className, MI_Boolean keysOnly)
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{
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MI_Result miResult = MI_RESULT_OK;
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MI_Operation miOperation = MI_OPERATION_NULL;
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MI_Boolean moreResults;
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const MI_Char *errorString = NULL;
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const MI_Instance *errorDetails = NULL;
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MI_Uint32 instanceCount = 0;
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MI_Result _miResult;
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/* Note that the identity of the thread needs to be the same as the one the session was created on. */
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/* Note, although this sample does not include the PowerShell callbacks for extended semantics, they are allowed
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* on synchronous operations. Allowable callbacks are:
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* MI_OperationCallbacks.writeError
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* MI_OperationCallbacks.writeMessage
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* MI_OperationCallbacks.writeProgress
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*/
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/* Initiate the EnumerateInstances operation. Synchronous results are always retrieved through a call MI_Operation_GetInstance().
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* All operations must be closed with a call to MI_Operation_Close(), but all results must be processed before that.
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* The operation can be cancelled via MI_Operation_Cancel(), although even then all results must be consumed before the operation
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* is closed.
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*/
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MI_Session_EnumerateInstances(miSession, 0, NULL, namespaceName, className, keysOnly, NULL, &miOperation);
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/* Must loop through all results until moreResults == MI_FALSE */
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do
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{
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MI_Instance *miInstance;
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MI_Result _miResult;
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/* Retrieve a single instance result */
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_miResult = MI_Operation_GetInstance(&miOperation, &miInstance, &moreResults, &miResult, &errorString, &errorDetails);
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if (_miResult != MI_RESULT_OK)
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{
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/* If this function returns a failure it means that an invalid parameter was passed in, or the identity of the thread
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* is different from the identity the operation was created with. Both imply programming error.
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*/
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wprintf(L"MI_Operation_GetInstance failed due to a programming error, error = %s\n", MI_Result_To_String(_miResult));
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break;
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}
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if (miInstance)
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{
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/* Dump the instance result */
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wprintf(L"------------------------------------------\n");
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Dump_MI_Instance(miInstance, keysOnly, 0);
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instanceCount++;
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}
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} while (miResult == MI_RESULT_OK && moreResults == MI_TRUE);
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/* moreResults == MI_FALSE, dump the final outcome of the operation */
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wprintf(L"------------------------------------------\n");
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if (miResult != MI_RESULT_OK)
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{
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wprintf(L"Operation failed, MI_Result=%s, errorString=%s, errorDetails=\n", MI_Result_To_String(miResult), errorString);
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Dump_MI_Instance(errorDetails, MI_FALSE, 0);
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}
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else
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{
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wprintf(L"Operation succeeded, number of instances=%u\n", instanceCount);
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}
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wprintf(L"------------------------------------------\n");
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/* All operations must be closed. If an operation is not closed the owning session will hang until the operations
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* are closed fully. MI_Operation_Close will cancel an operation if it is still running, however results must be
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* consumed before the close can complete fully.
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* For synchronous operations the MI_Operation_Close() method is synchronous until the final result has been consumed
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* (moreResults == MI_FALSE).
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*/
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_miResult = MI_Operation_Close(&miOperation);
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if (_miResult != MI_RESULT_OK)
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{
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/* This API is likely to fail with invalid parameter, out of memory errors or access denied.
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* When an out of memory error happens, the operation will shut down as best it can.
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* Invalid parameter means a programming error happened.
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* Access denied means the security context while calling into the Close() is different from
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* when the operation was created. This will be a programming error and could happen if closing
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* from a different thread and forgetting to impersonate.
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*/
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wprintf(L"MI_Operation_Close failed, error %s\n", MI_Result_To_String(_miResult));
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}
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}
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/* Do_Enumerate_Asynchronous() carries out an instance enumeration operation asynchronously. The asynchronous callback
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* will keep being called until moreResults==MI_FALSE.
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*/
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void Do_Enumerate_Asynchronous(MI_Session *miSession, _In_z_ const wchar_t *namespaceName, const wchar_t *className, MI_Boolean keysOnly)
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{
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MI_Operation miOperation = MI_OPERATION_NULL;
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MI_OperationCallbacks miOperationCallbacks = MI_OPERATIONCALLBACKS_NULL;
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struct InstanceResultCallback_Context instanceCallback_Context = {0};
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/* Create a notification event that we wait on until the operation has completed.
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* Note: This sample is demonstrating the asynchronous calling pattern for setting up
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* the operation, but to call a single operation and wait on a notification like
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* this example should really use the synchronous operations instead.
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*/
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instanceCallback_Context.asyncNotificationHandle = CreateEventW(NULL, FALSE, FALSE, NULL);
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if (instanceCallback_Context.asyncNotificationHandle == NULL)
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{
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wprintf(L"Failed to create a Windows Event, windows error %u\n", GetLastError());
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goto NoHandleError;
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}
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instanceCallback_Context.keysOnly = keysOnly;
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/* Add optional context information to callback structure so we can hold state
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* throughout the operation
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*/
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miOperationCallbacks.callbackContext = &instanceCallback_Context;
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/* Set instance callback function. This will keep being called until it is
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* called with moreResults==MI_FALSE.
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* It is this callback that puts instance operations into asyncronous mode.
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*/
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miOperationCallbacks.instanceResult = InstanceResultCallback;
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/* Optional callback (allowed for synchronous operations also), that receive
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* non-terminating operation error reports from a provider.
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*/
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miOperationCallbacks.writeError = WriteErrorCallback;
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/* Optional callback (allowed for synchronous operations also), that receive
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* non-terminating operation error reports from a provider.
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*/
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miOperationCallbacks.writeMessage = WriteMessageCallback;
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/* Optional callback (allowed for synchronous operations also), that receive
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* non-terminating operation error reports from a provider.
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*/
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miOperationCallbacks.writeProgress = WriteProgressCallback;
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/* Start the operation */
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MI_Session_EnumerateInstances(miSession, 0, NULL, namespaceName, className, keysOnly, &miOperationCallbacks, &miOperation);
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/* InstanceResultCallback() will always be called back for asyncronous operations, so wait for it to finish */
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WaitForSingleObject(instanceCallback_Context.asyncNotificationHandle, INFINITE);
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CloseHandle(instanceCallback_Context.asyncNotificationHandle);
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/* Final miResult is here if needed: instanceCallback_Context.finalResult
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* Any data from the callback cannot be accessed here because the lifetime of the data is
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* only valid in the callback and until the operation is closed.
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* In this sample the operation handle is closed inside the instance callback.
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*/
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NoHandleError:
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return;
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}
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