1 <?xml version="1.0" encoding="iso-8859-1"?>
2 <!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
3 <refentry id="idmap_tdb2.8">
6 <refentrytitle>idmap_tdb2</refentrytitle>
7 <manvolnum>8</manvolnum>
8 <refmiscinfo class="source">Samba</refmiscinfo>
9 <refmiscinfo class="manual">System Administration tools</refmiscinfo>
10 <refmiscinfo class="version">4.1</refmiscinfo>
15 <refname>idmap_tdb2</refname>
16 <refpurpose>Samba's idmap_tdb2 Backend for Winbind</refpurpose>
20 <title>DESCRIPTION</title>
23 The idmap_tdb2 plugin is a substitute for the default idmap_tdb
24 backend used by winbindd for storing SID/uid/gid mapping tables
25 in clustered environments with Samba and CTDB.
29 In contrast to read only backends like idmap_rid, it is an allocating
30 backend: This means that it needs to allocate new user and group IDs in
31 order to create new mappings.
36 <title>IDMAP OPTIONS</title>
40 <term>range = low - high</term>
42 Defines the available matching uid and gid range for which the
43 backend is authoritative.
50 This option can be used to configure an external program
51 for performing id mappings instead of using the tdb
52 counter. The mappings are then stored int tdb2 idmap
53 database. For details see the section on IDMAP SCRIPT below.
60 <title>IDMAP SCRIPT</title>
63 The tdb2 idmap backend supports an external program for performing id mappings
64 through the smb.conf option <parameter>idmap config * : script</parameter> or
65 its deprecated legacy form <parameter>idmap : script</parameter>.
69 The mappings obtained by the script are then stored in the idmap tdb2
70 database instead of mappings created by the incrementing id counters.
71 It is therefore important that the script covers the complete range of
72 SIDs that can be passed in for SID to Unix ID mapping, since otherwise
73 SIDs unmapped by the script might get mapped to IDs that had
74 previously been mapped by the script.
78 The script should accept the following command line options.
88 And it should return one of the following responses as a single line of
101 <title>EXAMPLES</title>
104 This example shows how tdb2 is used as a the default idmap backend.
109 idmap config * : backend = tdb2
110 idmap config * : range = 1000000-2000000
114 This example shows how tdb2 is used as a the default idmap backend
115 using an external program via the script parameter:
120 idmap config * : backend = tdb2
121 idmap config * : range = 1000000-2000000
122 idmap config * : script = /usr/local/samba/bin/idmap_script.sh
127 <title>AUTHOR</title>
130 The original Samba software and related utilities
131 were created by Andrew Tridgell. Samba is now developed
132 by the Samba Team as an Open Source project similar
133 to the way the Linux kernel is developed.