<samba:parameter name="add user script" context="G" type="string" advanced="1" developer="1" xmlns:samba="http://www.samba.org/samba/DTD/samba-doc"> <description> <para>This is the full pathname to a script that will be run <emphasis>AS ROOT</emphasis> by <citerefentry><refentrytitle>smbd</refentrytitle> <manvolnum>8</manvolnum></citerefentry> under special circumstances described below.</para> <para>Normally, a Samba server requires that UNIX users are created for all users accessing files on this server. For sites that use Windows NT account databases as their primary user database creating these users and keeping the user list in sync with the Windows NT PDC is an onerous task. This option allows smbd to create the required UNIX users <emphasis>ON DEMAND</emphasis> when a user accesses the Samba server.</para> <para>In order to use this option, <citerefentry><refentrytitle>smbd</refentrytitle> <manvolnum>8</manvolnum></citerefentry> must <emphasis>NOT</emphasis> be set to <parameter moreinfo="none">security = share</parameter> and <parameter moreinfo="none">add user script</parameter> must be set to a full pathname for a script that will create a UNIX user given one argument of <parameter moreinfo="none">%u</parameter>, which expands into the UNIX user name to create.</para> <para>When the Windows user attempts to access the Samba server, at login (session setup in the SMB protocol) time, <citerefentry><refentrytitle>smbd</refentrytitle> <manvolnum>8</manvolnum></citerefentry> contacts the <parameter moreinfo="none">password server</parameter> and attempts to authenticate the given user with the given password. If the authentication succeeds then <command moreinfo="none">smbd</command> attempts to find a UNIX user in the UNIX password database to map the Windows user into. If this lookup fails, and <parameter moreinfo="none">add user script </parameter> is set then <command moreinfo="none">smbd</command> will call the specified script <emphasis>AS ROOT</emphasis>, expanding any <parameter moreinfo="none">%u</parameter> argument to be the user name to create.</para> <para>If this script successfully creates the user then <command moreinfo="none">smbd </command> will continue on as though the UNIX user already existed. In this way, UNIX users are dynamically created to match existing Windows NT accounts.</para> <para> See also <smbconfoption name="security"/>, <smbconfoption name="password server"/>, <smbconfoption name="delete user script"/>. </para> </description> <value type="default"/> <value type="example">/usr/local/samba/bin/add_user %u</value> </samba:parameter>