Write filesystem-dependent code in c++

Question

How can I write filesystem-dependent code in C++? I am writing a user level library that should handle files in different ways depending on certain features in the underlying filesystem, how can I figure that out?

For example, are there any defined preprocessor directives that expose the filesystem?

Answer 1

On Windows, you can use the GetVolumeInformation function. On Linux and OSX (and BSD!), you can use the statfs function.

Answer 2

I'm not aware of any information that the preprocessor would give you on this.

Something to keep in mind is that you might be in a situation where the OS supports multiple types of filesystems. It's not inconceivable that an application might be accessing multiple filesystems at the same time on the same box.