+The value returned in
+.I d_off
+is the same as would be returned by calling
+.BR telldir (3)
+at the current position in the directory stream.
+Be aware that despite its type and name, the
+.I d_off
+field is seldom any kind of directory offset on modern filesystems.
+.\" https://lwn.net/Articles/544298/
+Applications should treat this field as an opaque value,
+making no assumptions about its contents; see also
+.BR telldir (3).
+