posix/lib/psxdll/unistd/getppid.c

   1 /* $Id: getppid.c,v 1.4 2002/10/29 04:45:48 rex Exp $
   2 */
   3 /*
   4  * COPYRIGHT:   See COPYING in the top level directory
   5  * PROJECT:     ReactOS POSIX+ Subsystem
   6  * FILE:        subsys/psx/lib/psxdll/unistd/getppid.c
   7  * PURPOSE:     Get the parent process ID
   8  * PROGRAMMER:  KJK::Hyperion <noog@libero.it>
   9  * UPDATE HISTORY:
  10  *              15/02/2002: Created
  11  */
  12
  13 #include <ddk/ntddk.h>
  14 #include <sys/types.h>
  15 #include <unistd.h>
  16 #include <psx/errno.h>
  17
  18 pid_t getppid(void)
  19 {
  20  PROCESS_BASIC_INFORMATION pbiInfo;
  21  NTSTATUS                  nErrCode;
  22
  23  nErrCode = NtQueryInformationProcess
  24  (
  25   NtCurrentProcess(),
  26   ProcessBasicInformation,
  27   &pbiInfo,
  28   sizeof(pbiInfo),
  29   NULL
  30  );
  31
  32  if(!NT_SUCCESS(nErrCode))
  33  {
  34   errno = __status_to_errno(nErrCode);
  35   return (0);
  36  }
  37
  38  return (pbiInfo.InheritedFromUniqueProcessId);
  39 }
  40
  41 /* EOF */
  42