reactos/subsystems/csr/main.c

   1 /* $Id$
   2  * --------------------------------------------------------------------
   3  *
   4  * This software is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This software is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this software; see the file COPYING.LIB. If not, write
  16  * to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
  17  * MA 02139, USA.
  18  *
  19  * --------------------------------------------------------------------
  20  */
  21 /*
  22  * COPYRIGHT:       See COPYING in the top level directory
  23  * PROJECT:         ReactOS CSR Sub System
  24  * FILE:            subsys/csr/csrss.c
  25  * PURPOSE:         CSR Executable
  26  * PROGRAMMERS:     Alex Ionescu (alex@relsoft.net)
  27  */
  28
  29 /* INCLUDES ******************************************************************/
  30
  31 #define WIN32_NO_STATUS
  32 #include <windows.h>
  33 #define NTOS_MODE_USER
  34 #include <ndk/ntndk.h>
  35 #include <csr/server.h>
  36
  37 #define NDEBUG
  38 #include <debug.h>
  39
  40 /* PRIVATE FUNCTIONS *********************************************************/
  41
  42 VOID
  43 NTAPI
  44 CsrpSetDefaultProcessHardErrorMode (VOID)
  45 {
  46     ULONG DefaultHardErrorMode = 0;
  47
  48     /* Disable hard errors */
  49     NtSetInformationProcess(NtCurrentProcess(),
  50                             ProcessDefaultHardErrorMode,
  51                             &DefaultHardErrorMode,
  52                             sizeof(DefaultHardErrorMode));
  53 }
  54
  55 /*
  56  * Note: Standard entrypoint for Native C Programs.
  57  * The OS backend (NtProcessStartup) which calls this routine is
  58  * implemented in a CRT-like static library (much like mainCRTStartup).
  59  * Do NOT manually add the NtProcessStartup entrypoint or anything else.
  60  */
  61 int
  62 _cdecl
  63 _main(int argc,
  64       char *argv[],
  65       char *envp[],
  66       int DebugFlag)
  67 {
  68     KPRIORITY BasePriority = (8 + 1) + 4;
  69     NTSTATUS Status;
  70     ULONG Response;
  71     UNREFERENCED_PARAMETER(envp);
  72     UNREFERENCED_PARAMETER(DebugFlag);
  73
  74
  75     /* Set the Priority */
  76     NtSetInformationProcess(NtCurrentProcess(),
  77                             ProcessBasePriority,
  78                             &BasePriority,
  79                             sizeof(KPRIORITY));
  80
  81     /* Give us IOPL so that we can access the VGA registers */
  82     Status = NtSetInformationProcess(NtCurrentProcess(),
  83                                      ProcessUserModeIOPL,
  84                                      NULL,
  85                                      0);
  86     if (!NT_SUCCESS(Status))
  87     {
  88         /* Raise a hard error */
  89         DPRINT1("CSRSS: Could not raise IOPL: %x\n", Status);
  90         Status = NtRaiseHardError(STATUS_IO_PRIVILEGE_FAILED,
  91                                   0,
  92                                   0,
  93                                   NULL,
  94                                   OptionOk,
  95                                   &Response);
  96     }
  97
  98     /* Initialize CSR through CSRSRV */
  99     Status = CsrServerInitialization(argc, argv);
 100     if (!NT_SUCCESS(Status))
 101     {
 102         /* Kill us */
 103         DPRINT1("CSRSS: CsrServerInitialization failed:% lx\n", Status);
 104         NtTerminateProcess (NtCurrentProcess(), Status);
 105     }
 106
 107     /* Disable errors */
 108     CsrpSetDefaultProcessHardErrorMode();
 109
 110     /* If this is Session 0, make sure killing us bugchecks the system */
 111     if (!NtCurrentPeb()->SessionId) RtlSetProcessIsCritical(TRUE, NULL, FALSE);
 112
 113     /* Kill this thread. CSRSRV keeps us going */
 114     NtTerminateThread (NtCurrentThread(), Status);
 115     return 0;
 116 }
 117
 118 /* EOF */