CVS commit: src/sys/kern

["David A. Holland" <dholland%netbsd.org@localhost>]

Module Name:    src
Committed By:   dholland
Date:           Wed Jun 30 17:51:49 UTC 2021

Modified Files:
        src/sys/kern: vfs_vnops.c

Log Message:
Improve Christos's vn_open fix.

- assert about api misuse up front (suggested by riastradh)
- restore the behavior of returning EOPNOTSUPP if ret_fd is NULL and we
  get a fd back (otherwise things like ktruss -o /dev/stderr panic)
- clear error to 0 for the EDUPFD and EMOVEFD cases so opening a
  cloner succeeds


To generate a diff of this commit:
cvs rdiff -u -r1.217 -r1.218 src/sys/kern/vfs_vnops.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.