wuauserv.c

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/*
* PROJECT:          ReactOS Update Service
* LICENSE:          GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
* PURPOSE:          Automatic Updates service stub.
*                   Stub is required for some application at the installation phase.
* COPYRIGHT:        Copyright 2018 Denis Malikov (filedem@gmail.com)
*/
 
#include "wuauserv.h"
 
/* GLOBALS ******************************************************************/
 
static WCHAR ServiceName[] = L"wuauserv";
 
static SERVICE_STATUS_HANDLE ServiceStatusHandle;
static SERVICE_STATUS ServiceStatus;
 
static HANDLE hStopEvent = NULL;
 
/* FUNCTIONS *****************************************************************/
 
static VOID
UpdateServiceStatus(DWORD dwState)
{
    ServiceStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
    ServiceStatus.dwCurrentState = dwState;
    ServiceStatus.dwControlsAccepted = 0;
    ServiceStatus.dwWin32ExitCode = 0;
    ServiceStatus.dwServiceSpecificExitCode = 0;
    ServiceStatus.dwCheckPoint = 0;
 
    if (dwState == SERVICE_START_PENDING ||
        dwState == SERVICE_STOP_PENDING ||
        dwState == SERVICE_PAUSE_PENDING ||
        dwState == SERVICE_CONTINUE_PENDING)
        ServiceStatus.dwWaitHint = 1000;
    else
        ServiceStatus.dwWaitHint = 0;
 
    if (dwState == SERVICE_RUNNING)
        ServiceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
 
    SetServiceStatus(ServiceStatusHandle, &ServiceStatus);
    DPRINT1("WU UpdateServiceStatus(%lu) called\n", dwState);
}
 
static DWORD WINAPI
ServiceControlHandler(DWORD dwControl,
                      DWORD dwEventType,
                      LPVOID lpEventData,
                      LPVOID lpContext)
{
    switch (dwControl)
    {
        case SERVICE_CONTROL_STOP:
            DPRINT1("WU ServiceControlHandler(SERVICE_CONTROL_STOP) received\n");
            SetEvent(hStopEvent);
            UpdateServiceStatus(SERVICE_STOP_PENDING);
            return ERROR_SUCCESS;
 
        case SERVICE_CONTROL_PAUSE:
            DPRINT1("WU ServiceControlHandler(SERVICE_CONTROL_PAUSE) received\n");
            UpdateServiceStatus(SERVICE_PAUSED);
            return ERROR_SUCCESS;
 
        case SERVICE_CONTROL_CONTINUE:
            DPRINT1("WU ServiceControlHandler(SERVICE_CONTROL_CONTINUE) received\n");
            UpdateServiceStatus(SERVICE_RUNNING);
            return ERROR_SUCCESS;
 
        case SERVICE_CONTROL_INTERROGATE:
            DPRINT1("WU ServiceControlHandler(SERVICE_CONTROL_INTERROGATE) received\n");
            SetServiceStatus(ServiceStatusHandle, &ServiceStatus);
            return ERROR_SUCCESS;
 
        case SERVICE_CONTROL_SHUTDOWN:
            DPRINT1("WU ServiceControlHandler(SERVICE_CONTROL_SHUTDOWN) received\n");
            SetEvent(hStopEvent);
            UpdateServiceStatus(SERVICE_STOP_PENDING);
            return ERROR_SUCCESS;
 
        default :
            DPRINT1("WU ServiceControlHandler(Control %lu) received\n", dwControl);
            return ERROR_CALL_NOT_IMPLEMENTED;
    }
}
 
VOID WINAPI
ServiceMain(DWORD argc, LPTSTR *argv)
{
    UNREFERENCED_PARAMETER(argc);
    UNREFERENCED_PARAMETER(argv);
 
    DPRINT("WU ServiceMain() called\n");
 
    ServiceStatusHandle = RegisterServiceCtrlHandlerExW(ServiceName,
                                                        ServiceControlHandler,
                                                        NULL);
    if (!ServiceStatusHandle)
    {
        DPRINT1("RegisterServiceCtrlHandlerExW() failed (Error %lu)\n", GetLastError());
        return;
    }
 
    hStopEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
    if (hStopEvent == NULL)
    {
        DPRINT1("CreateEvent() failed (Error %lu)\n", GetLastError());
        goto done;
    }
 
    UpdateServiceStatus(SERVICE_RUNNING);
 
    WaitForSingleObject(hStopEvent, INFINITE);
    CloseHandle(hStopEvent);
 
done:
    UpdateServiceStatus(SERVICE_STOPPED);
}
 
BOOL WINAPI
DllMain(HINSTANCE hinstDLL,
        DWORD fdwReason,
        LPVOID lpvReserved)
{
    switch (fdwReason)
    {
        case DLL_PROCESS_ATTACH:
            DisableThreadLibraryCalls(hinstDLL);
            break;
 
        case DLL_PROCESS_DETACH:
            break;
    }
 
    return TRUE;
}