base/system/services/services.c

   1 /*
   2  * PROJECT:     ReactOS Service Control Manager
   3  * LICENSE:     GPL - See COPYING in the top level directory
   4  * FILE:        base/system/services/services.c
   5  * PURPOSE:     Main SCM controller
   6  * COPYRIGHT:   Copyright 2001-2005 Eric Kohl
   7  *              Copyright 2007 Ged Murphy <gedmurphy@reactos.org>
   8  *
   9  */
  10
  11 /* NOTE:
  12  * - Services.exe is NOT a native application, it is a GUI app.
  13  */
  14
  15 /* INCLUDES *****************************************************************/
  16
  17 #include "services.h"
  18
  19 #define NDEBUG
  20 #include <debug.h>
  21
  22 int WINAPI RegisterServicesProcess(DWORD ServicesProcessId);
  23
  24 /* GLOBALS ******************************************************************/
  25
  26 #define PIPE_BUFSIZE 1024
  27 #define PIPE_TIMEOUT 1000
  28
  29 BOOL ScmShutdown = FALSE;
  30 static HANDLE hScmShutdownEvent = NULL;
  31
  32
  33 /* FUNCTIONS *****************************************************************/
  34
  35 VOID
  36 PrintString(LPCSTR fmt, ...)
  37 {
  38 #if DBG
  39     CHAR buffer[512];
  40     va_list ap;
  41
  42     va_start(ap, fmt);
  43     vsprintf(buffer, fmt, ap);
  44     va_end(ap);
  45
  46     OutputDebugStringA(buffer);
  47 #endif
  48 }
  49
  50
  51 VOID
  52 ScmLogError(DWORD dwEventId,
  53             WORD wStrings,
  54             LPCWSTR *lpStrings)
  55 {
  56     HANDLE hLog;
  57
  58     hLog = RegisterEventSourceW(NULL,
  59                                 L"Service Control Manager");
  60     if (hLog == NULL)
  61     {
  62         DPRINT1("ScmLogEvent: RegisterEventSourceW failed %d\n", GetLastError());
  63         return;
  64     }
  65
  66     if (!ReportEventW(hLog,
  67                       EVENTLOG_ERROR_TYPE,
  68                       0,
  69                       dwEventId,
  70                       NULL, // Sid,
  71                       wStrings,
  72                       0,
  73                       lpStrings,
  74                       NULL))
  75     {
  76         DPRINT1("ScmLogEvent: ReportEventW failed %d\n", GetLastError());
  77     }
  78
  79     DeregisterEventSource(hLog);
  80 }
  81
  82
  83 BOOL
  84 ScmCreateStartEvent(PHANDLE StartEvent)
  85 {
  86     HANDLE hEvent;
  87
  88     hEvent = CreateEventW(NULL,
  89                           TRUE,
  90                           FALSE,
  91                           L"SvcctrlStartEvent_A3752DX");
  92     if (hEvent == NULL)
  93     {
  94         if (GetLastError() == ERROR_ALREADY_EXISTS)
  95         {
  96             hEvent = OpenEventW(EVENT_ALL_ACCESS,
  97                                 FALSE,
  98                                 L"SvcctrlStartEvent_A3752DX");
  99             if (hEvent == NULL)
 100             {
 101                 return FALSE;
 102             }
 103         }
 104         else
 105         {
 106             return FALSE;
 107         }
 108     }
 109
 110     *StartEvent = hEvent;
 111
 112     return TRUE;
 113 }
 114
 115
 116 VOID
 117 ScmWaitForLsa(VOID)
 118 {
 119     HANDLE hEvent;
 120     DWORD dwError;
 121
 122     hEvent = CreateEventW(NULL,
 123                           TRUE,
 124                           FALSE,
 125                           L"LSA_RPC_SERVER_ACTIVE");
 126     if (hEvent == NULL)
 127     {
 128         dwError = GetLastError();
 129         DPRINT1("Failed to create the notication event (Error %lu)\n", dwError);
 130
 131         if (dwError == ERROR_ALREADY_EXISTS)
 132         {
 133             hEvent = OpenEventW(SYNCHRONIZE,
 134                                 FALSE,
 135                                 L"LSA_RPC_SERVER_ACTIVE");
 136             if (hEvent == NULL)
 137             {
 138                DPRINT1("Could not open the notification event (Error %lu)\n", GetLastError());
 139                return;
 140             }
 141         }
 142     }
 143
 144     DPRINT("Wait for the LSA server!\n");
 145     WaitForSingleObject(hEvent, INFINITE);
 146     DPRINT("LSA server running!\n");
 147
 148     CloseHandle(hEvent);
 149
 150     DPRINT("ScmWaitForLsa() done\n");
 151 }
 152
 153
 154 BOOL
 155 ScmNamedPipeHandleRequest(PVOID Request,
 156                           DWORD RequestSize,
 157                           PVOID Reply,
 158                           LPDWORD ReplySize)
 159 {
 160     DbgPrint("SCM READ: %s\n", Request);
 161
 162     *ReplySize = 0;
 163     return FALSE;
 164 }
 165
 166
 167 DWORD WINAPI
 168 ScmNamedPipeThread(LPVOID Context)
 169 {
 170     CHAR chRequest[PIPE_BUFSIZE];
 171     CHAR chReply[PIPE_BUFSIZE];
 172     DWORD cbReplyBytes;
 173     DWORD cbBytesRead;
 174     DWORD cbWritten;
 175     BOOL bSuccess;
 176     HANDLE hPipe;
 177
 178     hPipe = (HANDLE)Context;
 179
 180     DPRINT("ScmNamedPipeThread(%x) - Accepting SCM commands through named pipe\n", hPipe);
 181
 182     for (;;)
 183     {
 184         bSuccess = ReadFile(hPipe,
 185                             &chRequest,
 186                             PIPE_BUFSIZE,
 187                             &cbBytesRead,
 188                             NULL);
 189         if (!bSuccess || cbBytesRead == 0)
 190         {
 191             break;
 192         }
 193
 194         if (ScmNamedPipeHandleRequest(&chRequest, cbBytesRead, &chReply, &cbReplyBytes))
 195         {
 196             bSuccess = WriteFile(hPipe,
 197                                  &chReply,
 198                                  cbReplyBytes,
 199                                  &cbWritten,
 200                                  NULL);
 201             if (!bSuccess || cbReplyBytes != cbWritten)
 202             {
 203                 break;
 204             }
 205         }
 206     }
 207
 208     DPRINT("ScmNamedPipeThread(%x) - Disconnecting named pipe connection\n", hPipe);
 209
 210     FlushFileBuffers(hPipe);
 211     DisconnectNamedPipe(hPipe);
 212     CloseHandle(hPipe);
 213
 214     DPRINT("ScmNamedPipeThread(%x) - Done.\n", hPipe);
 215
 216     return ERROR_SUCCESS;
 217 }
 218
 219
 220 BOOL
 221 ScmCreateNamedPipe(VOID)
 222 {
 223     DWORD dwThreadId;
 224     BOOL bConnected;
 225     HANDLE hThread;
 226     HANDLE hPipe;
 227
 228     DPRINT("ScmCreateNamedPipe() - CreateNamedPipe(\"\\\\.\\pipe\\Ntsvcs\")\n");
 229
 230     hPipe = CreateNamedPipeW(L"\\\\.\\pipe\\Ntsvcs",
 231               PIPE_ACCESS_DUPLEX,
 232               PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_WAIT,
 233               PIPE_UNLIMITED_INSTANCES,
 234               PIPE_BUFSIZE,
 235               PIPE_BUFSIZE,
 236               PIPE_TIMEOUT,
 237               NULL);
 238     if (hPipe == INVALID_HANDLE_VALUE)
 239     {
 240         DPRINT("CreateNamedPipe() failed (%d)\n", GetLastError());
 241         return FALSE;
 242     }
 243
 244     DPRINT("CreateNamedPipe() - calling ConnectNamedPipe(%x)\n", hPipe);
 245     bConnected = ConnectNamedPipe(hPipe,
 246                                   NULL) ? TRUE : (GetLastError() == ERROR_PIPE_CONNECTED);
 247     DPRINT("CreateNamedPipe() - ConnectNamedPipe() returned %d\n", bConnected);
 248
 249     if (bConnected)
 250     {
 251         DPRINT("Pipe connected\n");
 252         hThread = CreateThread(NULL,
 253                                0,
 254                                ScmNamedPipeThread,
 255                                (LPVOID)hPipe,
 256                                0,
 257                                &dwThreadId);
 258         if (!hThread)
 259         {
 260             DPRINT("Could not create thread (%d)\n", GetLastError());
 261             DisconnectNamedPipe(hPipe);
 262             CloseHandle(hPipe);
 263             DPRINT("CreateNamedPipe() - returning FALSE\n");
 264             return FALSE;
 265         }
 266
 267         CloseHandle(hThread);
 268     }
 269     else
 270     {
 271         DPRINT("Pipe not connected\n");
 272         CloseHandle(hPipe);
 273         DPRINT("CreateNamedPipe() - returning FALSE\n");
 274         return FALSE;
 275     }
 276     DPRINT("CreateNamedPipe() - returning TRUE\n");
 277     return TRUE;
 278 }
 279
 280
 281 DWORD WINAPI
 282 ScmNamedPipeListenerThread(LPVOID Context)
 283 {
 284 //    HANDLE hPipe;
 285     DPRINT("ScmNamedPipeListenerThread(%x) - aka SCM.\n", Context);
 286
 287 //    hPipe = (HANDLE)Context;
 288     for (;;)
 289     {
 290         DPRINT("SCM: Waiting for new connection on named pipe...\n");
 291         /* Create named pipe */
 292         if (!ScmCreateNamedPipe())
 293         {
 294             DPRINT1("\nSCM: Failed to create named pipe\n");
 295             break;
 296             //ExitThread(0);
 297         }
 298         DPRINT("\nSCM: named pipe session created.\n");
 299         Sleep(10);
 300     }
 301     DPRINT("\n\nWARNING: ScmNamedPipeListenerThread(%x) - Aborted.\n\n", Context);
 302     return ERROR_SUCCESS;
 303 }
 304
 305
 306 BOOL
 307 StartScmNamedPipeThreadListener(VOID)
 308 {
 309     DWORD dwThreadId;
 310     HANDLE hThread;
 311
 312     hThread = CreateThread(NULL,
 313                            0,
 314                            ScmNamedPipeListenerThread,
 315                            NULL, /*(LPVOID)hPipe,*/
 316                            0,
 317                            &dwThreadId);
 318     if (!hThread)
 319     {
 320         DPRINT1("SERVICES: Could not create thread (Status %lx)\n", GetLastError());
 321         return FALSE;
 322     }
 323
 324     CloseHandle(hThread);
 325
 326     return TRUE;
 327 }
 328
 329
 330 BOOL WINAPI
 331 ShutdownHandlerRoutine(DWORD dwCtrlType)
 332 {
 333     DPRINT1("ShutdownHandlerRoutine() called\n");
 334
 335     if (dwCtrlType & (CTRL_SHUTDOWN_EVENT | CTRL_LOGOFF_EVENT))
 336     {
 337         DPRINT1("Shutdown event received!\n");
 338         ScmShutdown = TRUE;
 339
 340         ScmAutoShutdownServices();
 341         ScmShutdownServiceDatabase();
 342
 343         /* Set the shutdwon event */
 344         SetEvent(hScmShutdownEvent);
 345     }
 346
 347     return TRUE;
 348 }
 349
 350
 351 int WINAPI
 352 wWinMain(HINSTANCE hInstance,
 353          HINSTANCE hPrevInstance,
 354          LPWSTR lpCmdLine,
 355          int nShowCmd)
 356 {
 357     HANDLE hScmStartEvent = NULL;
 358     SC_RPC_LOCK Lock = NULL;
 359     BOOL bCanDeleteNamedPipeCriticalSection = FALSE;
 360     DWORD dwError;
 361
 362     DPRINT("SERVICES: Service Control Manager\n");
 363
 364     /* Create start event */
 365     if (!ScmCreateStartEvent(&hScmStartEvent))
 366     {
 367         DPRINT1("SERVICES: Failed to create start event\n");
 368         goto done;
 369     }
 370
 371     DPRINT("SERVICES: created start event with handle %p.\n", hScmStartEvent);
 372
 373     /* Create the shutdown event */
 374     hScmShutdownEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 375     if (hScmShutdownEvent == NULL)
 376     {
 377         DPRINT1("SERVICES: Failed to create shutdown event\n");
 378         goto done;
 379     }
 380
 381     /* Initialize our communication named pipe's critical section */
 382     ScmInitNamedPipeCriticalSection();
 383     bCanDeleteNamedPipeCriticalSection = TRUE;
 384
 385 //    ScmInitThreadManager();
 386
 387     /* FIXME: more initialization */
 388
 389     /* Read the control set values */
 390     if (!ScmGetControlSetValues())
 391     {
 392         DPRINT1("SERVICES: failed to read the control set values\n");
 393         goto done;
 394     }
 395
 396     /* Create the service database */
 397     dwError = ScmCreateServiceDatabase();
 398     if (dwError != ERROR_SUCCESS)
 399     {
 400         DPRINT1("SERVICES: failed to create SCM database (Error %lu)\n", dwError);
 401         goto done;
 402     }
 403
 404     /* Update service database */
 405     ScmGetBootAndSystemDriverState();
 406
 407     /* Register service process with CSRSS */
 408     RegisterServicesProcess(GetCurrentProcessId());
 409
 410     /* Acquire the service start lock until autostart services have been started */
 411     dwError = ScmAcquireServiceStartLock(TRUE, &Lock);
 412     if (dwError != ERROR_SUCCESS)
 413     {
 414         DPRINT1("SERVICES: failed to acquire the service start lock (Error %lu)\n", dwError);
 415         goto done;
 416     }
 417
 418     /* Start the RPC server */
 419     ScmStartRpcServer();
 420
 421     DPRINT("SERVICES: Initialized.\n");
 422
 423     /* Signal start event */
 424     SetEvent(hScmStartEvent);
 425
 426     /* Register event handler (used for system shutdown) */
 427     SetConsoleCtrlHandler(ShutdownHandlerRoutine, TRUE);
 428
 429     /* Wait for the LSA server */
 430     ScmWaitForLsa();
 431
 432     /* Start auto-start services */
 433     ScmAutoStartServices();
 434
 435     /* FIXME: more to do ? */
 436
 437     /* Release the service start lock */
 438     ScmReleaseServiceStartLock(&Lock);
 439
 440     DPRINT("SERVICES: Running.\n");
 441
 442     /* Wait until the shutdown event gets signaled */
 443     WaitForSingleObject(hScmShutdownEvent, INFINITE);
 444
 445 done:
 446     /* Delete our communication named pipe's critical section */
 447     if (bCanDeleteNamedPipeCriticalSection == TRUE)
 448         ScmDeleteNamedPipeCriticalSection();
 449
 450     /* Close the shutdown event */
 451     if (hScmShutdownEvent != NULL)
 452         CloseHandle(hScmShutdownEvent);
 453
 454     /* Close the start event */
 455     if (hScmStartEvent != NULL)
 456         CloseHandle(hScmStartEvent);
 457
 458     DPRINT("SERVICES: Finished.\n");
 459
 460     ExitThread(0);
 461
 462     return 0;
 463 }
 464
 465 /* EOF */