idmap_tdb2 8 Samba System Administration tools 3.6 idmap_tdb2 Samba's idmap_tdb2 Backend for Winbind 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. range = low - high Defines the available matching uid and gid range for which the backend is authoritative. The tdb2 idmap backend supports a script for performing id mappings through the smb.conf option idmap : 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 Note that the script should cover 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. This example shows how tdb2 is used as a the default idmap backend. It configures the idmap range through the global options for all domains encountered. [global] idmap config * : backend = tdb2 idmap config * : range = 1000000-2000000 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.