[Bug 214633] Open symlink with O_NOFOLLOW should fail with ELOOP, not EMLINK

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214633

--- Comment #3 from commit-hook at freebsd.org ---
A commit references this bug:

Author: jilles
Date: Tue Nov 22 22:30:55 UTC 2016
New revision: 309026
URL: https://svnweb.freebsd.org/changeset/base/309026

Log:
  open(2): Clarify non-POSIX error when opening a symlink with O_NOFOLLOW.

  We return [EMLINK] instead of [ELOOP] when trying to open a symlink with
  O_NOFOLLOW, so that the original case of [ELOOP] can be distinguished. Code
  like cmp -h and xz takes advantage of this.

  PR:           214633
  Reviewed by:  kib, imp
  MFC after:    1 week
  Differential Revision:        https://reviews.freebsd.org/D8586

Changes:
  head/lib/libc/sys/open.2

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