#include <io.h>
#include <stdio.h>
#include <sys/fcntl.h>
#include <windows.h>

BOOL
setup_privileges ()
{
  BOOL rc;
  HANDLE hToken = NULL;
  TOKEN_PRIVILEGES sPrivileges;
  rc = OpenProcessToken ( GetCurrentProcess() , TOKEN_ALL_ACCESS , &hToken ) ;
  if ( !rc )
    return FALSE;
  rc = LookupPrivilegeValue ( NULL, SE_DEBUG_NAME, &sPrivileges.Privileges[0].Luid );
  if ( !rc )
    return FALSE;
  sPrivileges.PrivilegeCount = 1 ;
  sPrivileges.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED ;
  rc = AdjustTokenPrivileges ( hToken, FALSE, &sPrivileges, 0, NULL, NULL ) ;
  if ( !rc )
    return FALSE;

  CloseHandle ( hToken );
  return TRUE;
}

int
client ()
{
  HANDLE hMaster, hObject, hDuppedObject;
  char* buf = "kaboom!";
  DWORD bytes_written;
  printf ( "slave pid=%d\n", GetCurrentProcessId ());
  scanf ("%x %x", &hMaster, &hObject);
  if (!DuplicateHandle (hMaster, hObject,
                        GetCurrentProcess (), &hDuppedObject,
                        0, FALSE, DUPLICATE_SAME_ACCESS))
    return 3;
  if (!WriteFile (hDuppedObject, buf, strlen (buf), &bytes_written, NULL))
    return 4;

  return 0;
}

int
main (int argc, char** argv)
{
  int fd;
  DWORD master_pid, slave_pid;
  HANDLE hMaster, hSlave, hDuppedMaster;

  if (argc <= 1)
    return client ();

  if (!setup_privileges ())
    return 2;

  master_pid = GetCurrentProcessId ();
  slave_pid = atoi (argv [1]);

  hMaster = OpenProcess (PROCESS_DUP_HANDLE, FALSE, master_pid);
  hSlave = OpenProcess (PROCESS_DUP_HANDLE, FALSE, slave_pid);

  if (!DuplicateHandle (hMaster, hMaster,
			hSlave, &hDuppedMaster,
			0, FALSE, DUPLICATE_SAME_ACCESS))
    return 3;

  fd = open ( "/tmp/secret", O_RDWR );

  printf ( "master handle=%p, object handle=%p\n",
           hDuppedMaster, get_osfhandle (fd));
  getchar ();
  close (fd);
  return 0;
}