Retrieving the path from a file descriptor or FILE *?

Question

Is there a way to retrieve path information from a file descriptor or FILE pointer?

I'm aware that this data may not always be relevant/useful for case where the file descriptor is a socket, pipe, etc.

Answer 1

I don't believe there's any portable way, but e.g. on Linux you can call readlink on "/proc/self/fd/fileno" and the kernel will give you a path if it can, or one of various kinds of funny-looking strings if not.