How to get procress image name

My  file operation monitor project need get name from process id, in case this process is create by other user, not in same session, generally , it is not, because my program run as service, it is run as local system.  get process name became an issue.

 it need AdjustTokenPrivileges  , I use SE_DEBUG_NAME the high privilege for get process name.

Sample code :


void EnableDebugPriv()
{
    HANDLE hToken;
    LUID luid;
    TOKEN_PRIVILEGES tkp;

    OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken);

    if (!::LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &luid))
    {
        wprintf(_T("ERROR %u\n"),GetLastError());
        CloseHandle(hToken);
        return;
    }

    tkp.PrivilegeCount = 1;
    tkp.Privileges[0].Luid = luid;
    tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

    if (!::AdjustTokenPrivileges(hToken, false, &tkp, sizeof(tkp), NULL, NULL))
    {
        wprintf(_T("ERROR %u\n"),GetLastError());
        CloseHandle(hToken);
        return;
    }

    CloseHandle(hToken);
    wprintf(_T("Should have worked"));
}


ProcessInfoStruct pInfo ;
  DWORD err = ERROR_SUCCESS;
  HANDLE Handle;
  char buffer[MAX_PATH];
  DWORD i = MAX_PATH ;
  Handle = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, processHandle);
  if (Handle != 0)
  {
    if (QueryFullProcessImageNameA(Handle, 0, buffer, &i) != 0)
    {
    pProcess->processHandle = processHandle;
    std::string pfullpath(buffer);
    Poco::Path pathname(pfullpath);
    pProcess->processName = pathname.getFileName();
    pProcess->processPath = pathname.parent().toString() ;
    pInfo.processHandle = processHandle ;
    pInfo.processName = pProcess->processName;
    pInfo.processPath = pProcess->processPath ;
    processCache.add(processHandle, pInfo);   
    }
    else
    {
 
      wprintf(_T("ERROR %u\n"),GetLastError());
   
   }
   CloseHandle(Handle);
  }
  else
  {
  
    wprintf(_T("ERROR %u\n"),GetLastError());
  
  
  }