<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>6.30.pam_shells - check for valid login shell</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="Linux-PAM_SAG.html" title="The Linux-PAM System Administrators' Guide"><link rel="up" href="sag-module-reference.html" title="Chapter6.A reference guide for available modules"><link rel="prev" href="sag-pam_selinux.html" title="6.29.pam_selinux - set the default security context"><link rel="next" href="sag-pam_succeed_if.html" title="6.31.pam_succeed_if - test account characteristics"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">6.30.pam_shells - check for valid login shell</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="sag-pam_selinux.html">Prev</a></td><th width="60%" align="center">Chapter6.A reference guide for available modules</th><td width="20%" align="right"><a accesskey="n" href="sag-pam_succeed_if.html">Next</a></td></tr></table><hr></div><div class="section" title="6.30.pam_shells - check for valid login shell"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sag-pam_shells"></a>6.30.pam_shells - check for valid login shell</h2></div></div></div><div class="cmdsynopsis"><p><code class="command">pam_shells.so</code> </p></div><div class="section" title="6.30.1.DESCRIPTION"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_shells-description"></a>6.30.1.DESCRIPTION</h3></div></div></div><p>
pam_shells is a PAM module that only allows access to the
system if the users shell is listed in <code class="filename">/etc/shells</code>.
</p><p>
It also checks if <code class="filename">/etc/shells</code> is a plain
file and not world writable.
</p></div><div class="section" title="6.30.2.OPTIONS"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_shells-options"></a>6.30.2.OPTIONS</h3></div></div></div><p> This module does not recognise any options.</p></div><div class="section" title="6.30.3.MODULE TYPES PROVIDED"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_shells-types"></a>6.30.3.MODULE TYPES PROVIDED</h3></div></div></div><p>
The <code class="option">auth</code> and <code class="option">account</code>
module types are provided.
</p></div><div class="section" title="6.30.4.RETURN VALUES"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_shells-return_values"></a>6.30.4.RETURN VALUES</h3></div></div></div><div class="variablelist"><dl><dt><span class="term">PAM_AUTH_ERR</span></dt><dd><p>
Access to the system was denied.
</p></dd><dt><span class="term">PAM_SUCCESS</span></dt><dd><p>
The users login shell was listed as valid shell in
<code class="filename">/etc/shells</code>.
</p></dd><dt><span class="term">PAM_SERVICE_ERR</span></dt><dd><p>
The module was not able to get the name of the user.
</p></dd></dl></div></div><div class="section" title="6.30.5.EXAMPLES"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_shells-examples"></a>6.30.5.EXAMPLES</h3></div></div></div><p>
</p><pre class="programlisting">
auth required pam_shells.so
</pre><p>
</p></div><div class="section" title="6.30.6.AUTHOR"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_shells-author"></a>6.30.6.AUTHOR</h3></div></div></div><p>
pam_shells was written by Erik Troan <ewt@redhat.com>.
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