reactos/lib/smlib/execpgm.c

   1 /* $Id: execpgm.c 13731 2005-02-23 23:37:06Z ea $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS system libraries
   5  * FILE:            lib/smlib/execpgm.c
   6  * PURPOSE:         Call SM API SM_API_EXECPGM
   7  */
   8 #define NTOS_MODE_USER
   9 #include <ntos.h>
  10 #include <sm/api.h>
  11 #include <sm/helper.h>
  12 #include <string.h>
  13
  14 #define NDEBUG
  15 #include <debug.h>
  16
  17 /**********************************************************************
  18  * NAME                                                 EXPORTED
  19  *      SmExecuteProgram/2
  20  *
  21  * DESCRIPTION
  22  *      This function is used to make the SM start an environment
  23  *      subsystem server process.
  24  *
  25  * ARGUMENTS
  26  *      hSmApiPort: port handle returned by SmConnectApiPort;
  27  *      Pgm       : name of the subsystem (to be used by the SM to
  28  *                  lookup the image name from the registry).
  29  *                  Valid names are: DEBUG, WINDOWS, POSIX, OS2,
  30  *                  and VMS.
  31  *
  32  * RETURN VALUE
  33  *      Success status as handed by the SM reply; otherwise a failure
  34  *      status code.
  35  */
  36 NTSTATUS STDCALL
  37 SmExecuteProgram (IN HANDLE          hSmApiPort,
  38                   IN PUNICODE_STRING Pgm)
  39 {
  40   NTSTATUS         Status;
  41   SM_PORT_MESSAGE  SmReqMsg;
  42
  43
  44   DPRINT("SMLIB: %s called\n", __FUNCTION__);
  45
  46   /* Check Pgm's length */
  47   if (Pgm->Length > (sizeof (Pgm->Buffer[0]) * SM_EXEXPGM_MAX_LENGTH))
  48   {
  49     return STATUS_INVALID_PARAMETER;
  50   }
  51   /* Marshal Pgm in the LPC message */
  52   RtlZeroMemory (& SmReqMsg, sizeof SmReqMsg);
  53   SmReqMsg.ExecPgm.NameLength = Pgm->Length;
  54   RtlCopyMemory (SmReqMsg.ExecPgm.Name,
  55                  Pgm->Buffer,
  56                  Pgm->Length);
  57
  58   /* SM API to invoke */
  59   SmReqMsg.ApiIndex = SM_API_EXECUTE_PROGRAMME;
  60
  61   /* LPC message */
  62   SmReqMsg.Header.MessageType = LPC_NEW_MESSAGE;
  63   SmReqMsg.Header.DataSize    = SM_PORT_DATA_SIZE(SmReqMsg.ExecPgm);
  64   SmReqMsg.Header.MessageSize = SM_PORT_MESSAGE_SIZE;
  65
  66   /* Call SM and wait for a reply */
  67   Status = NtRequestWaitReplyPort (hSmApiPort, (PLPC_MESSAGE) & SmReqMsg, (PLPC_MESSAGE) & SmReqMsg);
  68   if (NT_SUCCESS(Status))
  69   {
  70     return SmReqMsg.Status;
  71   }
  72   DPRINT("SMLIB: %s failed (Status=0x%08lx)\n", __FUNCTION__, Status);
  73   return Status;
  74 }
  75
  76 /* EOF */