shadow/man/login.defs.d/TCB_SYMLINKS.xml

<!--
   SPDX-FileCopyrightText: 2010, Pawel Hajdan
   SPDX-License-Identifier: BSD-3-Clause
-->
<varlistentry condition="tcb">
  <term><option>TCB_SYMLINKS</option> (boolean)</term>
  <listitem>
    <para>
      If <replaceable>yes</replaceable>, the location of the user tcb
      directory to be created will not be automatically set to /etc/tcb/user,
      but will be computed depending on the UID of the user, according to
      the following algorithm:
      <programlisting>
if ( UID is less than 1000) {
  use /etc/tcb/user
} else if ( UID is less than 1000000) {
  kilos = UID / 1000
  use /etc/tcb/:kilos/user
  make symlink /etc/tcb/user to the above directory
} else {
  megas = UID / 1000000
  kilos = ( UID / megas * 1000000 ) / 1000
  use /etc/tcb/:megas/:kilos/user
  make symlink /etc/tcb/user to the above directory
}
      </programlisting>
    </para>
  </listitem>
</varlistentry>