[Samba] idmap troubles with any version 3.30 or later

Michael Adam obnox at samba.org
Fri Jan 21 04:52:45 MST 2011

Hi Jim,

Jim Stalewski wrote:
> Hello list.
> The issue I have is that with the changes made to the idmap
> functionality of winbind, as regards the enumeration of rfc2307 users
> and groups using getent passwd and getent group, only those AD users
> that are not in the domains included in the "idmap config (domain)"
> statements (the ones in trusted domains that get their ID mappings
> auto-assigned by the TDB backend with id's in the idmap uid / gid
> ranges) get enumerated.  The ones that have the RFC2307 attributes
> defined within the idmap group (domain) range statements will return
> their uid/gid/homedir/shell info only if you specify "getent passwd
> (username)" but they do not enumerate with a "getent passwd."  Same with
> getent group (groupname) vs getent group.

If this is a case, then it is a bug and needs fixing.
There have been bugs with enumeration in the past and
I need to go recheck bugzilla.
Maybe such bug reappeared or there is a fix that is
not yet in the versions you tested.
Otherwise, we need to file a new bug.

Could you be more precise and send your smb.conf file
and indicate for which of the idmap configs listed, users
are not enumerated?

> I have had to create the symlinks in /usr/lib and /usr/lib64 for the
> /lib/nss_winbind.so.2, /lib/nss_wins.so.2, /lib64/nss_winbind.so.2 and
> /lib64/nss_wins.so.2 libs manually because the installer did not create
> them for me, and until I did so, getent passwd and getent group only
> displayed the local /etc/passwd and /etc/group entries.

Hm, so you compiled and installed samba manually?
This can also be considered a bug.
Usually, on linux, this is taken care of by the distribution
packagers in the RPMs /.debs and whatnot. This may be the reason
why this did not pop up prominently yet.

Could provide more info about your system?
OS, version, architecture, build system, ...

> Question - are there any other symlinks that should be created for any
> other aspect of the nss idmap functionality that may not have been
> created by the install process, that would be breaking the user / group
> enumeration functionality of nss_winbind.so, and if so, what libs need
> to be symlinked to which folders using what names?

This question is too general instead.
Usually each component providing nss backends should
take care of installing the correct libs/symlinks in its
installer itself. If you are manually installing samba, then
you might have to There should

Could you paste your /etc/nsswitch.conf ?

Best regards,


> I have tried version 3.3x, 3.4.3 and 3.5.4 all with the same lack of
> results from getent passwd and getent group but it functioned properly
> under 3.2.7, so it can't be
> Thanks in advance,
> Jim.
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