Go to main content

man pages section 8: System Administration Commands

Exit Print View

Updated: Thursday, June 13, 2019
 
 

idmap_tdb2 (8)

Name

idmap_tdb2 - Samba's idmap_tdb2 Backend for Winbind

Synopsis

Please see following description for synopsis

Description

System Administration tools                                      IDMAP_TDB2(8)



NAME
       idmap_tdb2 - Samba's idmap_tdb2 Backend for Winbind

DESCRIPTION
       The idmap_tdb2 plugin is a substitute for the default idmap_tdb backend
       used by winbindd for storing SID/uid/gid mapping tables in clustered
       environments with Samba and CTDB.

       In contrast to read only backends like idmap_rid, it is an allocating
       backend: This means that it needs to allocate new user and group IDs in
       order to create new mappings.

IDMAP OPTIONS
       range = low - high
           Defines the available matching uid and gid range for which the
           backend is authoritative.

       script
           This option can be used to configure an external program for
           performing id mappings instead of using the tdb counter. The
           mappings are then stored int tdb2 idmap database. For details see
           the section on IDMAP SCRIPT below.

IDMAP SCRIPT
       The tdb2 idmap backend supports an external program for performing id
       mappings through the smb.conf option idmap config * : script or its
       deprecated legacy form idmap : script.

       The mappings obtained by the script are then stored in the idmap tdb2
       database instead of mappings created by the incrementing id counters.
       It is therefore important that the script covers the complete range of
       SIDs that can be passed in for SID to Unix ID mapping, since otherwise
       SIDs unmapped by the script might get mapped to IDs that had previously
       been mapped by the script.

       The script should accept the following command line options.

                SIDTOID S-1-xxxx
                IDTOSID UID xxxx
                IDTOSID GID xxxx


       And it should return one of the following responses as a single line of
       text.

                UID:yyyy
                GID:yyyy
                SID:yyyy
                ERR:yyyy


EXAMPLES
       This example shows how tdb2 is used as a the default idmap backend.

                [global]
                idmap config * : backend = tdb2
                idmap config * : range = 1000000-2000000


       This example shows how tdb2 is used as a the default idmap backend
       using an external program via the script parameter:

                [global]
                idmap config * : backend = tdb2
                idmap config * : range = 1000000-2000000
                idmap config * : script = /usr/local/samba/bin/idmap_script.sh


AUTHOR
       The original Samba software and related utilities were created by
       Andrew Tridgell. Samba is now developed by the Samba Team as an Open
       Source project similar to the way the Linux kernel is developed.



ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+-----------------------+
       |ATTRIBUTE TYPE |   ATTRIBUTE VALUE     |
       +---------------+-----------------------+
       |Availability   | service/network/samba |
       +---------------+-----------------------+
       |Stability      | Volatile              |
       +---------------+-----------------------+
NOTES
       This software was built from source available at
       https://github.com/oracle/solaris-userland.  The original community
       source was downloaded from
       https://download.samba.org/pub/samba/stable/samba-4.9.3.tar.gz

       Further information about this software can be found on the open source
       community website at http://www.samba.org/.



Samba 4.9.3                       01/24/2019                     IDMAP_TDB2(8)