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idmap_tdb2

IDMAP_TDB2(8)						    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.

Samba 4.0							    06/17/2014							     IDMAP_TDB2(8)