UUIDs / stable identifiers for files and directories?

[wojtek@xxxxxxxxxxxx]

Hello,

Is it true that every file and directory has its own UUID? And if so: is it
accessible to user programs? Can it be made accessible?

We want to develop a system that would store part of its data in the
filesystem, and part in the database. It would be very convenient to have
an unique and stable (surviving backup -  restore, dump) filesystem object
identifiers, and also uid -> path, or open by uid functionality.

Regards,
Wojtek