How to tell which path a fanotify event refers to
fanotify, linux
Solution
You can use `readlink` on `/proc/self/fd/<fdnum>`, where `fdnum` refers to the `fd` member of the `struct fanotify_event_metadata` for the event.
Problem
I'd like to find out which files are opened on my system in which order, in order to prefetch them from disk. It seems that fanotify should be well suited to monitor the whole system for open events. But as far as I can tell, the `fanotify_event_metadata` structure does not have a field to contain the path. So how can I tell which path a given event refers to? Or is fanotify the wrong approach to find path names, and do I have to recursively register watches for the whole tree using inotify?