[PATCH] Move nss_compat from nis to nss subdir and install it unconditionally.

[Zack Weinberg]

On Wed, Oct 4, 2017 at 5:51 AM, Andreas Schwab <schwab@suse.de> wrote:
> This has been tested that local lookup still works with and
> without an installed libnss_nis, and that NIS lookup works when
> libnss_nis is available.

It now occurs to me that another test might be a good idea: configure
a system with at least one local non-root user and also at least one
+user or +@netgroup line in /etc/passwd, and "passwd: compat" in
/etc/nsswitch.conf, but *don't* install libnss_nis or any NIS
configuration; then make sure that all of the local users can log in
even though libnss_nis is unavailable (that is, _compat only tries to
use _nis if it doesn't find a local match for the query), that the
users included from NIS *cannot* log in (fail closed), and that the
failure to log in produces an error message that will point the
sysadmin at least vaguely in the right direction.

zw