Hi, at the moment nix only supports receiving the fanotify_event_metadata from the Fanotify::read_events method. This skips over all the additional information records that could be returned by fanotify (such as when FAN_REPORT_FID is specified in InitFlags).

The libc crate recently implemented the fanotify_event_info_fid, fanotify_event_info_error and fanotify_event_info_pidfd structs, as well as a number of enums for the additional flags and event types.

Would you be open to a PR implementing these APIs into nix?