<?xml version="1.0" encoding="UTF-8"?> <!-- Copyright (c) 2005 , Tomasz Kłoczko Copyright (c) 2007 - 2008, Nicolas François All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. The name of the copyright holders or contributors may not be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --> <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [ <!ENTITY MAX_MEMBERS_PER_GROUP SYSTEM "login.defs.d/MAX_MEMBERS_PER_GROUP.xml"> ]> <refentry id='groupmems.8'> <!-- $Id$ --> <refmeta> <refentrytitle>groupmems</refentrytitle> <manvolnum>8</manvolnum> <refmiscinfo class="sectdesc">System Management Commands</refmiscinfo> </refmeta> <refnamediv id='name'> <refname>groupmems</refname> <refpurpose>administer members of a user's primary group</refpurpose> </refnamediv> <refsynopsisdiv id='synopsis'> <cmdsynopsis> <command>groupmems</command> <group choice='plain'> <arg choice='plain'>-a <replaceable>user_name</replaceable></arg> <arg choice='plain'>-d <replaceable>user_name</replaceable></arg> <arg choice='opt'>-g <replaceable>group_name</replaceable></arg> <arg choice='plain'>-l </arg><arg choice='plain'>-p </arg> </group> </cmdsynopsis> </refsynopsisdiv> <refsect1 id='description'> <title>DESCRIPTION</title> <para> The <command>groupmems</command> command allows a user to administer his/her own group membership list without the requirement of superuser privileges. The <command>groupmems</command> utility is for systems that configure its users to be in their own name sake primary group (i.e., guest / guest). </para> <para>Only the superuser, as administrator, can use <command>groupmems</command> to alter the memberships of other groups. </para> </refsect1> <refsect1 id='options'> <title>OPTIONS</title> <para> The options which apply to the <command>groupmems</command> command are: </para> <variablelist remap='IP'> <varlistentry> <term><option>-a</option>, <option>--add</option> <replaceable>user_name</replaceable></term> <listitem> <para>Add an user to the group membership list.</para> <para condition="gshadow"> If the <filename>/etc/gshadow</filename> file exist, and the group has no entry in the <filename>/etc/gshadow</filename> file, a new entry will be created. </para> </listitem> </varlistentry> <varlistentry> <term><option>-d</option>, <option>--delete</option> <replaceable>user_name</replaceable></term> <listitem> <para>Delete a user from the group membership list.</para> <para condition="gshadow"> If the <filename>/etc/gshadow</filename> file exist, the user will be removed from the list of members and administrators of the group. </para> <para condition="gshadow"> If the <filename>/etc/gshadow</filename> file exist, and the group has no entry in the <filename>/etc/gshadow</filename> file, a new entry will be created. </para> </listitem> </varlistentry> <varlistentry> <term><option>-g</option>, <option>--group</option> <replaceable>group_name</replaceable></term> <listitem> <para>The superuser can specify which group membership list to modify. </para> </listitem> </varlistentry> <varlistentry> <term><option>-l</option>, <option>--list</option></term> <listitem> <para>List the group membership list.</para> </listitem> </varlistentry> <varlistentry> <term><option>-p</option>, <option>--purge</option></term> <listitem> <para>Purge all users from the group membership list.</para> <para condition="gshadow"> If the <filename>/etc/gshadow</filename> file exist, and the group has no entry in the <filename>/etc/gshadow</filename> file, a new entry will be created. </para> </listitem> </varlistentry> </variablelist> </refsect1> <refsect1 id='setup'> <title>SETUP</title> <para> The <command>groupmems</command> executable should be in mode <literal>2770</literal> as user <emphasis>root</emphasis> and in group <emphasis>groups</emphasis>. The system administrator can add users to group <emphasis>groups</emphasis> to allow or disallow them using the <command>groupmems</command> utility to manage their own group membership list. </para> <programlisting> $ groupadd -r groups $ chmod 2770 groupmems $ chown root.groups groupmems $ groupmems -g groups -a gk4 </programlisting> </refsect1> <refsect1 id='configuration'> <title>CONFIGURATION</title> <para> The following configuration variables in <filename>/etc/login.defs</filename> change the behavior of this tool: </para> <variablelist> &MAX_MEMBERS_PER_GROUP; </variablelist> </refsect1> <refsect1 id='files'> <title>FILES</title> <variablelist> <varlistentry> <term><filename>/etc/group</filename></term> <listitem> <para>Group account information.</para> </listitem> </varlistentry> <varlistentry condition="gshadow"> <term><filename>/etc/gshadow</filename></term> <listitem> <para>secure group account information</para> </listitem> </varlistentry> </variablelist> </refsect1> <refsect1 id='see_also'> <title>SEE ALSO</title> <para> <citerefentry> <refentrytitle>chfn</refentrytitle><manvolnum>1</manvolnum> </citerefentry>, <citerefentry> <refentrytitle>chsh</refentrytitle><manvolnum>1</manvolnum> </citerefentry>, <citerefentry> <refentrytitle>passwd</refentrytitle><manvolnum>1</manvolnum> </citerefentry>, <citerefentry> <refentrytitle>groupadd</refentrytitle><manvolnum>8</manvolnum> </citerefentry>, <citerefentry> <refentrytitle>groupdel</refentrytitle><manvolnum>8</manvolnum> </citerefentry>, <citerefentry> <refentrytitle>useradd</refentrytitle><manvolnum>8</manvolnum> </citerefentry>, <citerefentry> <refentrytitle>userdel</refentrytitle><manvolnum>8</manvolnum> </citerefentry>, <citerefentry> <refentrytitle>usermod</refentrytitle><manvolnum>8</manvolnum> </citerefentry>. </para> </refsect1> </refentry>