dlls/wevtsvc/wevtsvc.c

   1 /*
   2  * Event Log Service
   3  *
   4  * Copyright 2020 Dmitry Timoshkov
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "winsvc.h"
  26 #include "wine/debug.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(eventlog);
  29
  30 static SERVICE_STATUS_HANDLE svc_handle;
  31 static HANDLE done_event;
  32
  33 static void eventlog_update_status(DWORD state)
  34 {
  35     SERVICE_STATUS status;
  36
  37     status.dwServiceType = SERVICE_WIN32;
  38     status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
  39     status.dwWin32ExitCode = 0;
  40     status.dwServiceSpecificExitCode = 0;
  41     status.dwCheckPoint = 0;
  42     status.dwWaitHint = 0;
  43     status.dwControlsAccepted = 0;
  44     status.dwCurrentState = state;
  45
  46     SetServiceStatus(svc_handle, &status);
  47 }
  48
  49 static void WINAPI eventlog_handler(DWORD control)
  50 {
  51     TRACE("%#x\n", control);
  52
  53     switch (control)
  54     {
  55     case SERVICE_CONTROL_STOP:
  56     case SERVICE_CONTROL_SHUTDOWN:
  57         eventlog_update_status(SERVICE_STOP_PENDING);
  58         SetEvent(done_event);
  59         break;
  60
  61     default:
  62         eventlog_update_status(SERVICE_RUNNING);
  63         break;
  64     }
  65 }
  66
  67 void WINAPI ServiceMain(DWORD argc, LPWSTR *argv)
  68 {
  69     TRACE("starting Event Log Service\n");
  70
  71     svc_handle = RegisterServiceCtrlHandlerW(L"EventLog", eventlog_handler);
  72     if (!svc_handle)
  73     {
  74         ERR("RegisterServiceCtrlHandler error %u\n", GetLastError());
  75         return;
  76     }
  77
  78     eventlog_update_status(SERVICE_RUNNING);
  79
  80     done_event = CreateEventW(NULL, TRUE, FALSE, NULL);
  81     WaitForSingleObject(done_event, INFINITE);
  82     CloseHandle(done_event);
  83
  84     eventlog_update_status(SERVICE_STOPPED);
  85
  86     TRACE("exiting Event Log Service\n");
  87 }