title: ftell on a file descriptor?
body: <p>Is there a way to do what ftell() does (return the current position in the file) on a raw file descriptor instead of a FILE*? I think there ought to be, since you can seek on a raw file descriptor using lseek().</p>
  
  <p>I know I could use fdopen() to create a FILE* corresponding to the file descriptor, but I'd rather not do that.</p>