467 lines
12 KiB
C
467 lines
12 KiB
C
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 2000
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//
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// File: updates.h
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// Definition of the Updates class
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//
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//--------------------------------------------------------------------------
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#pragma once
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#include "wuauengi.h"
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#include "wuaulib.h"
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#include <Wtsapi32.h>
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#include <wuaustate.h>
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#include <wuaueng.h>
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#include <accctrl.h>
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#include <aclapi.h>
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#include "pch.h"
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// functions IUpdates uses
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void HrUninit(void);
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HRESULT StartDownload(void);
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HRESULT PauseDownload(BOOL bPause);
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HRESULT GetUpdatesList(VARIANT *vList);
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HRESULT GetInstallXML(BSTR *pbstrCatalogXML, BSTR *pbstrDownloadXML);
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void saveSelection(VARIANT *selection);
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HRESULT GetDownloadStatus(UINT *pPercentage, DWORD *pdwnldStatus, BOOL fCareAboutConnection = TRUE);
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HRESULT GetInstallStatus(UINT *pNumFinished, DWORD *pStatus);
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HRESULT GetEvtHandles(AUEVTHANDLES *pAuEvtHandles);
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DWORD AvailableSessions(void);
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BOOL IsSessionAUEnabledAdmin(DWORD dwSessionId);
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/////////////////////////////////////////////////////////////////////////////
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// Updates
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class Updates :
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public IUpdates
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{
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public:
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HANDLE m_hEngineMutex;
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Updates();
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~Updates();
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BOOL m_fInitializeSecurity(void);
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HRESULT m_AccessCheckClient(void);
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HRESULT GetServiceHandles();
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DWORD ProcessState();
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BOOL CheckConnection();
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// IUnknown
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STDMETHOD(QueryInterface)(REFIID riid, void **ppvObject);
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STDMETHOD_(ULONG, AddRef)(void);
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STDMETHOD_(ULONG, Release)(void);
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// IClassFactory
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STDMETHOD(CreateInstance)(IUnknown*,REFIID,void**);
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STDMETHOD(LockServer)(BOOL);
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// IUpdates
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STDMETHOD(get_State)(/*[out, retval]*/ AUSTATE *pAuState);
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STDMETHOD(get_Option)(/*[out, retval]*/ AUOPTION * pAuOpt);
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STDMETHOD(put_Option)(/*[in]*/ AUOPTION auopt);
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STDMETHOD(GetUpdatesList)(/*[out]*/ VARIANT *pUpdates);
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STDMETHOD(SaveSelections)(/*[in]*/ VARIANT vUpdates);
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STDMETHOD(StartDownload)(void);
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STDMETHOD(GetDownloadStatus)(/*[out]*/ UINT *, /*[out]*/ DWORD *);
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STDMETHOD(SetDownloadPaused)(/*[in]*/ BOOL bPaused);
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STDMETHOD(ConfigureAU)();
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STDMETHOD(AvailableSessions(/*[out]*/ UINT *pcSess));
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STDMETHOD(get_EvtHandles(/*[in]*/DWORD dwCltProcId, /*[out]*/ AUEVTHANDLES *pauevtHandles));
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STDMETHOD(ClientMessage(/*[in]*/ UINT msg));
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//STDMETHOD(PingStatus(/*[in]*/ StatusEntry se));
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STDMETHOD(GetNotifyData(/*[out]*/ CLIENT_NOTIFY_DATA *pNotifyData));
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STDMETHOD(GetInstallXML(/*[out]*/ BSTR *pbstrCatalogXML, /*[out]*/ BSTR *pbstrDownloadXML));
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STDMETHOD(LogEvent(/*[in]*/ WORD wType, /*[in]*/ WORD wCategory, /*[in]*/ DWORD dwEventID, /*[in]*/ VARIANT vItems));
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private:
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SECURITY_DESCRIPTOR m_AdminSecurityDesc;
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static GENERIC_MAPPING m_AdminGenericMapping;
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PSID m_pAdminSid;
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PACL m_pAdminAcl;
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long m_refs;
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};
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class CLIENT_HANDLES
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{
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public:
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CLIENT_HANDLES(void){
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InitHandle();
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}
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~CLIENT_HANDLES(void){
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Reset(TRUE);
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}
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BOOL fRebootWarningMode()
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{
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return m_fRebootWarningMode;
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}
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void StopClients(BOOL fRelaunch) {
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if (m_fRebootWarningMode)
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{
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DEBUGMSG("WUAUENG told %d CLIENT(S) to exit", m_dwRebootWarningClientNum);
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if (NULL != m_hClientExitEvt)
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{
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SetEvent(m_hClientExitEvt);
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}
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}
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else
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{
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if (fClient())
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{
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if (fRelaunch)
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{
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DEBUGMSG("WUAUENG told WUAUCLT to relaunch");
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NotifyClient(NOTIFY_RELAUNCH_CLIENT);
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}
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else
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{
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DEBUGMSG("WUAUENG told WUAUCLT to exit");
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NotifyClient(NOTIFY_STOP_CLIENT);
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}
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}
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else
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{
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DEBUGMSG("WARNING: StopClients() : no existing client");
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}
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}
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}
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void ClientAddTrayIcon(void) {
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if (m_fRebootWarningMode || m_fAsLocalSystem)
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{
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DEBUGMSG("WARNING: ClientAddTrayIcon() called in wrong mode");
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return;
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}
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if (fClient())
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{
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NotifyClient(NOTIFY_ADD_TRAYICON);
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}
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}
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void ClientRemoveTrayIcon(void) {
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if (m_fRebootWarningMode || m_fAsLocalSystem)
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{
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DEBUGMSG("WARNING: ClientRemoveTrayIcon() called in wrong mode");
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return;
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}
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if (fClient())
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{
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NotifyClient(NOTIFY_REMOVE_TRAYICON);
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}
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}
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void ClientStateChange(void) {
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if (m_fRebootWarningMode || m_fAsLocalSystem)
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{
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DEBUGMSG("WARNING: ClientStateChange() called in wrong mode");
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return;
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}
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NotifyClient(NOTIFY_STATE_CHANGE);
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}
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void ClientShowInstallWarning(void){
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if (m_fRebootWarningMode || m_fAsLocalSystem)
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{
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DEBUGMSG("WARNING: ClientShowInstallWarning() called in wrong mode");
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return;
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}
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if (fClient())
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{
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NotifyClient(NOTIFY_SHOW_INSTALLWARNING);
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}
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}
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void ResetClient(void) {
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if (m_fRebootWarningMode || m_fAsLocalSystem)
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{
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DEBUGMSG("WARNING: ResetClient() called in wrong mode");
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return;
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}
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if (fClient())
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{
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NotifyClient(NOTIFY_RESET);
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}
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}
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//checking existence of client(s)
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BOOL fClient(void) {
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if (m_fRebootWarningMode)
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{
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return m_dwRebootWarningClientNum > 0;
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}
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else
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{
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return (-1 != m_dwProcId) && (NULL != m_hClientProcess);
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}
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}
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void SetHandle(PROCESS_INFORMATION & ProcessInfo, BOOL fAsLocalSystem)
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{
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m_fRebootWarningMode = FALSE;
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m_fAsLocalSystem = fAsLocalSystem;
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m_dwProcId = ProcessInfo.dwProcessId;
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m_hClientProcess = ProcessInfo.hProcess;
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SafeCloseHandle(ProcessInfo.hThread);
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}
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BOOL AddHandle(PROCESS_INFORMATION & ProcessInfo)
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{
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HANDLE *pTmp;
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m_fRebootWarningMode = TRUE;
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SafeCloseHandle(ProcessInfo.hThread);
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pTmp = (HANDLE*) realloc(m_phRebootWarningClients, (m_dwRebootWarningClientNum+1)*sizeof(HANDLE));
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if (NULL == pTmp)
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{
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return FALSE;
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}
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m_phRebootWarningClients = pTmp;
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m_phRebootWarningClients[m_dwRebootWarningClientNum] = ProcessInfo.hProcess;
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m_dwRebootWarningClientNum ++;
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return TRUE;
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}
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void RemoveHandle(HANDLE hProcess)
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{
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if (m_fRebootWarningMode)
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{
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for (DWORD i = 0; i < m_dwRebootWarningClientNum; i++)
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{
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if (hProcess == m_phRebootWarningClients[i])
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{
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CloseHandle(hProcess);
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m_phRebootWarningClients[i] = m_phRebootWarningClients[m_dwRebootWarningClientNum -1];
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m_dwRebootWarningClientNum --;
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DEBUGMSG("RemoveHandle in Reboot warning mode");
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}
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}
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if (0 == m_dwRebootWarningClientNum)
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{//all clients are gone
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Reset();
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}
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}
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else
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{
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DEBUGMSG("RemoveHandle in regular mode");
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if (hProcess == m_hClientProcess)
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{ //all clients are gone
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Reset();
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}
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}
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}
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void InitHandle(void)
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{
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DEBUGMSG("WUAUENG client handles initialized");
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m_hClientProcess = NULL;
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m_dwProcId = -1;
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m_dwRebootWarningClientNum = 0;
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m_phRebootWarningClients = NULL;
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m_fRebootWarningMode = FALSE;
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m_fAsLocalSystem = FALSE;
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m_hClientExitEvt = NULL;
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}
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DWORD GetProcId(void)
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{
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if (m_fRebootWarningMode)
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{
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DEBUGMSG("WARNING: GetProcId() called in wrong mode");
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return -1;
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}
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return m_dwProcId;
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}
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CONST HANDLE hClientProcess(void)
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{
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if (m_fRebootWarningMode)
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{
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DEBUGMSG("WARNING: hClientProcess() called in wrong mode");
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return NULL;
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}
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return m_hClientProcess;
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}
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void WaitForClientExits()
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{
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HANDLE *pTmp;
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if (!m_fRebootWarningMode)
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{
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if (NULL != m_hClientProcess)
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{
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WaitForSingleObject(m_hClientProcess, INFINITE);
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}
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}
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else
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{
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if (m_dwRebootWarningClientNum > 0)
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{
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WaitForMultipleObjects(m_dwRebootWarningClientNum, m_phRebootWarningClients, TRUE, INFINITE);
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}
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}
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Reset();
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return;
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}
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//////////////////////////////////////////////////////////////////
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// szName should have size of at least MAX_PATH characters
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//////////////////////////////////////////////////////////////////
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BOOL CreateClientExitEvt(LPTSTR OUT szName, DWORD dwCchSize)
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{
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const TCHAR szClientName[] = _T("Global\\Microsoft.WindowsUpdate.AU.ClientExitEvt.");
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TCHAR szBuf[50];
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GUID guid;
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HRESULT hr;
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AUASSERT(NULL == m_hClientExitEvt);
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if (FAILED(hr = CoCreateGuid(&guid)))
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{
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DEBUGMSG("Fail to Create guid with error %#lx", hr);
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return FALSE;
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}
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StringFromGUID2(guid, szBuf, ARRAYSIZE(szBuf)); // szBuf should be big enough, function always succeed
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if (FAILED(hr = StringCchCopyEx(szName, dwCchSize, szClientName, NULL, NULL, MISTSAFE_STRING_FLAGS)) ||
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FAILED(hr = StringCchCatEx(szName, dwCchSize, szBuf, NULL, NULL, MISTSAFE_STRING_FLAGS))) //szName is now 86 characters long
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{
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DEBUGMSG("Fail to construct client exit event name with error %#lx", hr);
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return FALSE;
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}
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if (NULL == (m_hClientExitEvt = CreateEvent(NULL, TRUE, FALSE, szName)))
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{
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DEBUGMSG("Fail to create client exit event with error %d", GetLastError());
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return FALSE;
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}
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if (!AllowEveryOne(m_hClientExitEvt))
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{
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DEBUGMSG("Fail to grant access on client exit event to everyone");
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SafeCloseHandleNULL(m_hClientExitEvt);
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return FALSE;
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}
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DEBUGMSG("access granted to everyone on client exit event");
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return TRUE;
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}
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private:
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void NotifyClient(CLIENT_NOTIFY_CODE notClientCode)
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{
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//notify client even before or after it is created
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#ifdef DBG
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LPCSTR aClientCodeMsg[] = {"stop client", "add trayicon", "remove trayicon", "state change", "show install warning", "reset client", "relaunch client"};
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DEBUGMSG("Notify Client for %s", aClientCodeMsg[notClientCode-1]);
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#endif
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gClientNotifyData.actionCode = notClientCode;
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SetEvent(ghNotifyClient);
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return;
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}
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////////////////////////////////////////////////////////////////////
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// grant SYNCHRONIZE access on hObject to everyone
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////////////////////////////////////////////////////////////////////
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BOOL AllowEveryOne (HANDLE hObject) // handle to the event
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{
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LPTSTR pszTrustee; // trustee for new ACE
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TRUSTEE_FORM TrusteeForm; // format of trustee structure
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DWORD dwRes;
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PACL pOldDACL = NULL, pNewDACL = NULL;
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PSECURITY_DESCRIPTOR pSD = NULL;
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EXPLICIT_ACCESS ea;
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PSID pWorldSid = NULL;
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BOOL fRet;
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// World SID
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SID_IDENTIFIER_AUTHORITY WorldAuth = SECURITY_WORLD_SID_AUTHORITY;
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if (! (fRet =AllocateAndInitializeSid(&WorldAuth,1, SECURITY_WORLD_RID, 0,0,0,0,0,0,0,&pWorldSid)))
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{
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DEBUGMSG("WUAUENG: AllowEveryOne() failed with error %d", GetLastError());
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goto Cleanup;
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}
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// Get a pointer to the existing DACL.
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dwRes = GetSecurityInfo(hObject, SE_KERNEL_OBJECT,
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||
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|
DACL_SECURITY_INFORMATION,
|
||
|
|
NULL, NULL, &pOldDACL, NULL, &pSD);
|
||
|
|
if (!(fRet = (ERROR_SUCCESS == dwRes))) {
|
||
|
|
DEBUGMSG( "GetSecurityInfo Error %u", dwRes );
|
||
|
|
goto Cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Initialize an EXPLICIT_ACCESS structure for the new ACE.
|
||
|
|
|
||
|
|
ZeroMemory(&ea, sizeof(EXPLICIT_ACCESS));
|
||
|
|
ea.grfAccessPermissions = SYNCHRONIZE;
|
||
|
|
ea.grfAccessMode = SET_ACCESS;
|
||
|
|
ea.grfInheritance= NO_INHERITANCE;
|
||
|
|
ea.Trustee.TrusteeForm = TRUSTEE_IS_SID;
|
||
|
|
ea.Trustee.TrusteeType = TRUSTEE_IS_GROUP;
|
||
|
|
ea.Trustee.ptstrName = (LPTSTR)pWorldSid;
|
||
|
|
|
||
|
|
// Create a new ACL that merges the new ACE
|
||
|
|
// into the existing DACL.
|
||
|
|
|
||
|
|
dwRes = SetEntriesInAcl(1, &ea, pOldDACL, &pNewDACL);
|
||
|
|
if (!(fRet = (ERROR_SUCCESS == dwRes))) {
|
||
|
|
DEBUGMSG( "SetEntriesInAcl Error %u", dwRes );
|
||
|
|
goto Cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Attach the new ACL as the object's DACL.
|
||
|
|
dwRes = SetSecurityInfo(hObject, SE_KERNEL_OBJECT,
|
||
|
|
DACL_SECURITY_INFORMATION,
|
||
|
|
NULL, NULL, pNewDACL, NULL);
|
||
|
|
if (!(fRet = (ERROR_SUCCESS == dwRes))) {
|
||
|
|
DEBUGMSG( "SetSecurityInfo Error %u", dwRes );
|
||
|
|
goto Cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
Cleanup:
|
||
|
|
if(pSD != NULL)
|
||
|
|
LocalFree((HLOCAL) pSD);
|
||
|
|
if(pNewDACL != NULL)
|
||
|
|
LocalFree((HLOCAL) pNewDACL);
|
||
|
|
if (NULL != pWorldSid)
|
||
|
|
{
|
||
|
|
FreeSid(pWorldSid);
|
||
|
|
}
|
||
|
|
return fRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
void Reset( BOOL fDestructor = FALSE)
|
||
|
|
{
|
||
|
|
SafeCloseHandleNULL(m_hClientProcess);
|
||
|
|
SafeCloseHandleNULL(m_hClientExitEvt);
|
||
|
|
m_dwProcId = -1;
|
||
|
|
if (!fDestructor)
|
||
|
|
{
|
||
|
|
ResetEvent(ghNotifyClient);
|
||
|
|
}
|
||
|
|
if (m_dwRebootWarningClientNum > 0)
|
||
|
|
{
|
||
|
|
DEBUGMSG("WUAUENG CLIENT_HANDLES::Reset() close %d handles", m_dwRebootWarningClientNum);
|
||
|
|
for (DWORD i = 0; i < m_dwRebootWarningClientNum; i++)
|
||
|
|
{
|
||
|
|
CloseHandle(m_phRebootWarningClients[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
SafeFreeNULL(m_phRebootWarningClients); //still need to free even m_dwRebootWarningClientNum is 0
|
||
|
|
m_dwRebootWarningClientNum = 0;
|
||
|
|
m_phRebootWarningClients = NULL;
|
||
|
|
m_fRebootWarningMode = FALSE;
|
||
|
|
m_fAsLocalSystem = FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
HANDLE m_hClientProcess; //Handle to the client process
|
||
|
|
DWORD m_dwProcId;
|
||
|
|
HANDLE *m_phRebootWarningClients;
|
||
|
|
DWORD m_dwRebootWarningClientNum; //number of valid handles in m_phRebootWarningClients
|
||
|
|
BOOL m_fRebootWarningMode;
|
||
|
|
BOOL m_fAsLocalSystem;
|
||
|
|
HANDLE m_hClientExitEvt;
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
extern CLIENT_HANDLES ghClientHandles;
|