Index: lib/libc/sys/open.2
===================================================================
--- lib/libc/sys/open.2
+++ lib/libc/sys/open.2
@@ -503,6 +503,20 @@
 .Fn openat
 function was introduced in
 .Fx 8.0 .
+.Sh STANDARDS
+These functions are specified by
+.St -p1003.1-2008 .
+.Fx
+sets errno to
+.Er EMLINK instead of
+.Er ELOOP
+as specified by
+.Tn POSIX
+when
+.Dv O_NOFOLLOW
+is set in flags and the final component of pathname is a symbolic link
+to distinguish it from the case of too many symbolic link traversals
+in one of its non-final components.
 .Sh BUGS
 The Open Group Extended API Set 2 specification requires that the test
 for whether