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<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (c) 2005 - 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" [
<!-- SHADOW-CONFIG-HERE -->
]>
<refentry id='gshadow.5'>
<!-- $Id$ -->
<refentryinfo>
<author>
<firstname>Nicolas</firstname>
<surname>François</surname>
<email>nicolas.francois@centraliens.net</email>
<contrib>Creation, 2005</contrib>
<contrib>shadow-utils maintainer, 2007 - now</contrib>
</author>
</refentryinfo>
<refmeta>
<refentrytitle>gshadow</refentrytitle>
<manvolnum>5</manvolnum>
<refmiscinfo class="sectdesc">File Formats and Conversions</refmiscinfo>
<refmiscinfo class="source">shadow-utils</refmiscinfo>
<refmiscinfo class="version">&SHADOW_UTILS_VERSION;</refmiscinfo>
</refmeta>
<refnamediv id='name'>
<refname>gshadow</refname>
<refpurpose>shadowed group file</refpurpose>
</refnamediv>
<refsect1 id='description'>
<title>DESCRIPTION</title>
<para>
<filename>/etc/gshadow</filename> contains the shadowed information
for group accounts.
</para>
<para>
This file must not be readable by regular users if password security
is to be maintained.
</para>
<para>
Each line of this file contains the following colon-separated
fields:
</para>
<variablelist>
<varlistentry>
<term><emphasis role="bold">group name</emphasis></term>
<listitem>
<para>
It must be a valid group name, which exist on the system.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">encrypted password</emphasis></term>
<listitem>
<para>
Refer to <citerefentry><refentrytitle>crypt</refentrytitle>
<manvolnum>3</manvolnum></citerefentry> for details on how
this string is interpreted.
</para>
<para>
If the password field contains some string that is not a valid
result of <citerefentry><refentrytitle>crypt</refentrytitle>
<manvolnum>3</manvolnum></citerefentry>, for instance ! or *,
users will not be able to use a unix password to access the
group (but group members do not need the password).
</para>
<para>
The password is used when a user who is not a member of the
group wants to gain the permissions of this group (see
<citerefentry><refentrytitle>newgrp</refentrytitle>
<manvolnum>1</manvolnum></citerefentry>).
</para>
<para>
This field may be empty, in which case only the group members
can gain the group permissions.
</para>
<para>
A password field which starts with an exclamation mark means
that the password is locked. The remaining characters on the
line represent the password field before the password was
locked.
</para>
<para>
This password supersedes any password specified in
<filename>/etc/group</filename>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">administrators</emphasis></term>
<listitem>
<para>
It must be a comma-separated list of user names.
</para>
<para>
Administrators can change the password or the members of the
group.
</para>
<para>
Administrators also have the same permissions as the members
(see below).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">members</emphasis></term>
<listitem>
<para>
It must be a comma-separated list of user names.
</para>
<para>
Members can access the group without being prompted for a
password.
</para>
<para>
You should use the same list of users as in
<filename>/etc/group</filename>.
</para>
</listitem>
</varlistentry>
</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>
<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>gpasswd</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>group</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>grpck</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>grpconv</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>newgrp</refentrytitle><manvolnum>1</manvolnum>
</citerefentry>.
</para>
</refsect1>
</refentry>
|
