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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Chapter 4. Generic optional arguments</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="Linux-PAM_MWG.html" title="The Linux-PAM Module Writers' Guide"><link rel="up" href="Linux-PAM_MWG.html" title="The Linux-PAM Module Writers' Guide"><link rel="prev" href="mwg-expected-of-module-chauthtok.html" title="3.5. Authentication token management"><link rel="next" href="mwg-see-programming.html" title="Chapter 5. Programming notes"></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">Chapter 4. Generic optional arguments</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="mwg-expected-of-module-chauthtok.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="mwg-see-programming.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="mwg-see-options"></a>Chapter 4. Generic optional arguments</h1></div></div></div><p>
      Here we list the generic arguments that all modules can expect to
      be passed. They are not mandatory, and their absence should be
      accepted without comment by the module.
    </p><div class="variablelist"><dl class="variablelist"><dt><span class="term">debug</span></dt><dd><p>
             Use the <span class="citerefentry"><span class="refentrytitle">pam_syslog</span>(3)</span> call to log debugging information to the system
             log files.
          </p></dd><dt><span class="term">use_first_pass</span></dt><dd><p>
             The module should not prompt the user for a password.
             Instead, it should obtain the previously typed password
             (by a call to <code class="function">pam_get_item()</code> for the
             <em class="parameter"><code>PAM_AUTHTOK</code></em> item), and use that. If
             that doesn't work, then the user will not be authenticated.
             (This option is intended for <span class="command"><strong>auth</strong></span> and
             <span class="command"><strong>passwd</strong></span> modules only).
          </p></dd></dl></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="mwg-expected-of-module-chauthtok.html">Prev</a> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="mwg-see-programming.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">3.5. Authentication token management </td><td width="20%" align="center"><a accesskey="h" href="Linux-PAM_MWG.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 5. Programming notes</td></tr></table></div></body></html>