Oh, right, I reworded it slightly, but I think this is something we should note.
Index: fsync.2 =================================================================== RCS file: /home/cvs/src/lib/libc/sys/fsync.2,v retrieving revision 1.14 diff -u -p -r1.14 fsync.2 --- fsync.2 10 Sep 2015 17:55:21 -0000 1.14 +++ fsync.2 16 Apr 2019 20:18:03 -0000 @@ -66,6 +66,16 @@ and .Fn fdatasync should be used by programs that require a file to be in a known state, for example, in building a simple transaction facility. +.Pp +If +.Fn fsync +or +.Fn fdatasync +fails with +.Er EIO , +the state of the on-disk data may have been only partially written. +To guard against potential inconsistency, future calls will continue failing +until all references to the file are closed. .Sh RETURN VALUES .Rv -std fsync fdatasync .Sh ERRORS
