How to Access File Descriptor of Open File

Is there any way to access the file descriptor of a file opened in c++? So ...

 #include <iostream>
 #include <fstream>
 using namespace std;

 int main() {
      ifstream inputFile( "file.txt",ios::in );
      cout << inputFile.fileDesc << endl;//made up call
      return 0;
 }

The question is, does something like fileDesc exist for ifstreams? If not how would I go about doing this?