The FS_Info class takes a file name in its constructor, and
lets you gather information about the specified file. The information you
can retrieve is not as extensive as using the stat C library function.
The advantage of using this class is that FS_Info supports an
extensible architecture for accessing file information from sources other than
on disk. For example, if the given file name begins with "http:", the
FS_Info will retrieve the file from a web server. If the file
name begins with "opdef:" or "oplib:", and your code is running from within
Houdini, the FS_Info will access a file embbedded in the operator
type library or operator definition speficied by the file name.