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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>6.31. pam_succeed_if - test account characteristics</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="Linux-PAM_SAG.html" title="The Linux-PAM System Administrators' Guide"><link rel="up" href="sag-module-reference.html" title="Chapter 6. A reference guide for available modules"><link rel="prev" href="sag-pam_shells.html" title="6.30. pam_shells - check for valid login shell"><link rel="next" href="sag-pam_tally.html" title="6.32. pam_tally - login counter (tallying) module"></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">6.31. pam_succeed_if - test account characteristics</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="sag-pam_shells.html">Prev</a> </td><th width="60%" align="center">Chapter 6. A reference guide for available modules</th><td width="20%" align="right"> <a accesskey="n" href="sag-pam_tally.html">Next</a></td></tr></table><hr></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sag-pam_succeed_if"></a>6.31. pam_succeed_if - test account characteristics</h2></div></div></div><div class="cmdsynopsis"><p><code class="command">pam_succeed_if.so</code> [<em class="replaceable"><code>flag</code></em>...] [<em class="replaceable"><code>condition</code></em>...]</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_succeed_if-description"></a>6.31.1. DESCRIPTION</h3></div></div></div><p>
pam_succeed_if.so is designed to succeed or fail authentication
based on characteristics of the account belonging to the user being
authenticated or values of other PAM items. One use is to select whether
to load other modules based on this test.
</p><p>
The module should be given one or more conditions as module arguments,
and authentication will succeed only if all of the conditions are met.
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_succeed_if-options"></a>6.31.2. OPTIONS</h3></div></div></div><p>
The following <span class="emphasis"><em>flag</em></span>s are supported:
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">debug</code></span></dt><dd><p>Turns on debugging messages sent to syslog.</p></dd><dt><span class="term"><code class="option">use_uid</code></span></dt><dd><p>
Evaluate conditions using the account of the user whose UID
the application is running under instead of the user being
authenticated.
</p></dd><dt><span class="term"><code class="option">quiet</code></span></dt><dd><p>Don't log failure or success to the system log.</p></dd><dt><span class="term"><code class="option">quiet_fail</code></span></dt><dd><p>
Don't log failure to the system log.
</p></dd><dt><span class="term"><code class="option">quiet_success</code></span></dt><dd><p>
Don't log success to the system log.
</p></dd><dt><span class="term"><code class="option">audit</code></span></dt><dd><p>
Log unknown users to the system log.
</p></dd></dl></div><p>
<span class="emphasis"><em>Condition</em></span>s are three words: a field, a test,
and a value to test for.
</p><p>
Available fields are <span class="emphasis"><em>user</em></span>,
<span class="emphasis"><em>uid</em></span>, <span class="emphasis"><em>gid</em></span>,
<span class="emphasis"><em>shell</em></span>, <span class="emphasis"><em>home</em></span>,
<span class="emphasis"><em>ruser</em></span>, <span class="emphasis"><em>rhost</em></span>,
<span class="emphasis"><em>tty</em></span> and <span class="emphasis"><em>service</em></span>:
</p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="option">field < number</code></span></dt><dd><p>Field has a value numerically less than number.</p></dd><dt><span class="term"><code class="option">field <= number</code></span></dt><dd><p>
Field has a value numerically less than or equal to number.
</p></dd><dt><span class="term"><code class="option">field eq number</code></span></dt><dd><p>
Field has a value numerically equal to number.
</p></dd><dt><span class="term"><code class="option">field >= number</code></span></dt><dd><p>
Field has a value numerically greater than or equal to number.
</p></dd><dt><span class="term"><code class="option">field > number</code></span></dt><dd><p>
Field has a value numerically greater than number.
</p></dd><dt><span class="term"><code class="option">field ne number</code></span></dt><dd><p>
Field has a value numerically different from number.
</p></dd><dt><span class="term"><code class="option">field = string</code></span></dt><dd><p>
Field exactly matches the given string.
</p></dd><dt><span class="term"><code class="option">field != string</code></span></dt><dd><p>
Field does not match the given string.
</p></dd><dt><span class="term"><code class="option">field =~ glob</code></span></dt><dd><p>Field matches the given glob.</p></dd><dt><span class="term"><code class="option">field !~ glob</code></span></dt><dd><p>Field does not match the given glob.</p></dd><dt><span class="term"><code class="option">field in item:item:...</code></span></dt><dd><p>Field is contained in the list of items separated by colons.</p></dd><dt><span class="term"><code class="option">field notin item:item:...</code></span></dt><dd><p>Field is not contained in the list of items separated by colons.</p></dd><dt><span class="term"><code class="option">user ingroup group</code></span></dt><dd><p>User is in given group.</p></dd><dt><span class="term"><code class="option">user notingroup group</code></span></dt><dd><p>User is not in given group.</p></dd><dt><span class="term"><code class="option">user innetgr netgroup</code></span></dt><dd><p>(user,host) is in given netgroup.</p></dd><dt><span class="term"><code class="option">user notinnetgr group</code></span></dt><dd><p>(user,host) is not in given netgroup.</p></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_succeed_if-types"></a>6.31.3. MODULE TYPES PROVIDED</h3></div></div></div><p>
All module types (<code class="option">account</code>, <code class="option">auth</code>,
<code class="option">password</code> and <code class="option">session</code>) are provided.
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_succeed_if-return_values"></a>6.31.4. RETURN VALUES</h3></div></div></div><div class="variablelist"><dl class="variablelist"><dt><span class="term">PAM_SUCCESS</span></dt><dd><p>
The condition was true.
</p></dd><dt><span class="term">PAM_AUTH_ERR</span></dt><dd><p>
The condition was false.
</p></dd><dt><span class="term">PAM_SERVICE_ERR</span></dt><dd><p>
A service error occurred or the arguments can't be
parsed correctly.
</p></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_succeed_if-examples"></a>6.31.5. EXAMPLES</h3></div></div></div><p>
To emulate the behaviour of <span class="emphasis"><em>pam_wheel</em></span>, except
there is no fallback to group 0:
</p><pre class="programlisting">
auth required pam_succeed_if.so quiet user ingroup wheel
</pre><p>
Given that the type matches, only loads the othermodule rule if
the UID is over 500. Adjust the number after default to skip
several rules.
</p><pre class="programlisting">
type [default=1 success=ignore] pam_succeed_if.so quiet uid > 500
type required othermodule.so arguments...
</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_succeed_if-author"></a>6.31.6. AUTHOR</h3></div></div></div><p>Nalin Dahyabhai <nalin@redhat.com></p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sag-pam_shells.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sag-module-reference.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sag-pam_tally.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">6.30. pam_shells - check for valid login shell </td><td width="20%" align="center"><a accesskey="h" href="Linux-PAM_SAG.html">Home</a></td><td width="40%" align="right" valign="top"> 6.32. pam_tally - login counter (tallying) module</td></tr></table></div></body></html>