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<?xml version="1.0" encoding='UTF-8'?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
<refentry id="pam_shells">
<refmeta>
<refentrytitle>pam_shells</refentrytitle>
<manvolnum>8</manvolnum>
<refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo>
</refmeta>
<refnamediv id="pam_shells-name">
<refname>pam_shells</refname>
<refpurpose>PAM module to check for valid login shell</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis id="pam_shells-cmdsynopsis">
<command>pam_shells.so</command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1 id="pam_shells-description">
<title>DESCRIPTION</title>
<para>
pam_shells is a PAM module that only allows access to the
system if the user's shell is listed in <filename>/etc/shells</filename>.
</para>
<para>
It also checks if <filename>/etc/shells</filename> is a plain
file and not world writable.
</para>
</refsect1>
<refsect1 id="pam_shells-options">
<title>OPTIONS</title>
<para> This module does not recognise any options.</para>
</refsect1>
<refsect1 id="pam_shells-types">
<title>MODULE TYPES PROVIDED</title>
<para>
The <option>auth</option> and <option>account</option>
module types are provided.
</para>
</refsect1>
<refsect1 id='pam_shells-return_values'>
<title>RETURN VALUES</title>
<variablelist>
<varlistentry>
<term>PAM_AUTH_ERR</term>
<listitem>
<para>
Access to the system was denied.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>PAM_SUCCESS</term>
<listitem>
<para>
The user's login shell was listed as valid shell in
<filename>/etc/shells</filename>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>PAM_SERVICE_ERR</term>
<listitem>
<para>
The module was not able to get the name of the user.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='pam_shells-examples'>
<title>EXAMPLES</title>
<para>
<programlisting>
auth required pam_shells.so
</programlisting>
</para>
</refsect1>
<refsect1 id='pam_shells-see_also'>
<title>SEE ALSO</title>
<para>
<citerefentry>
<refentrytitle>shells</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>pam.conf</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>
</para>
</refsect1>
<refsect1 id='pam_shells-author'>
<title>AUTHOR</title>
<para>
pam_shells was written by Erik Troan <ewt@redhat.com>.
</para>
</refsect1>
</refentry>
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