The ENOTDIR mapping was introduced in r235266 for kern/128933 based on
an interpretation of the somewhat ambiguous language in the POSIX realpath
specification. The interpretation is inconsistent with Solaris and Linux,
a regression from 9.0, and does not appear to be permitted by the
description of ENOTDIR:
20 ENOTDIR Not a directory. A component of the specified pathname
existed, but it was not a directory, when a directory was
expected.
PR: standards/171577
MFC after: 3 days