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Edit: /usr/share/doc/pam/html/sag-pam_selinux.html (8313B)

<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>6.29. pam_selinux - set the default security context</title><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"><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_securetty.html" title="6.28. pam_securetty - limit root login to special devices"><link rel="next" href="sag-pam_shells.html" title="6.30. pam_shells - check for valid login shell"></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">6.29. pam_selinux - set the default security context</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="sag-pam_securetty.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_shells.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_selinux"></a>6.29. pam_selinux - set the default security context</h2></div></div></div><div class="cmdsynopsis"><p><code class="command">pam_selinux.so</code>  [
	open
      ] [
	close
      ] [
	restore
      ] [
	nottys
      ] [
	debug
      ] [
	verbose
      ] [
	select_context
      ] [
	env_params
      ] [
	use_current_range
      ]</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_selinux-description"></a>6.29.1. DESCRIPTION</h3></div></div></div><p>
      pam_selinux is a PAM module that sets up the default SELinux security
      context for the next executed process.
    </p><p>
      When a new session is started, the open_session part of the module
      computes and sets up the execution security context used for the next
      <span class="citerefentry"><span class="refentrytitle">execve</span>(2)</span>
      call, the file security context for the controlling terminal, and
      the security context used for creating a new kernel keyring.
    </p><p>
      When the session is ended, the close_session part of the module restores
      old security contexts that were in effect before the change made
      by the open_session part of the module.
    </p><p>
      Adding pam_selinux into the PAM stack might disrupt behavior of other
      PAM modules which execute applications.  To avoid that,
      <span class="emphasis"><em>pam_selinux.so open</em></span> should be placed after such
      modules in the PAM stack, and <span class="emphasis"><em>pam_selinux.so close</em></span>
      should be placed before them.  When such a placement is not feasible,
      <span class="emphasis"><em>pam_selinux.so restore</em></span> could be used to temporary
      restore original security contexts.
    </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_selinux-options"></a>6.29.2. OPTIONS</h3></div></div></div><div class="variablelist"><dl class="variablelist"><dt><span class="term">
          <code class="option">open</code>
        </span></dt><dd><p>
            Only execute the open_session part of the module.
          </p></dd><dt><span class="term">
          <code class="option">close</code>
        </span></dt><dd><p>
            Only execute the close_session part of the module.
          </p></dd><dt><span class="term">
          <code class="option">restore</code>
        </span></dt><dd><p>
            In open_session part of the module, temporarily restore the
            security contexts as they were before the previous call of
            the module.  Another call of this module without the restore
            option will set up the new security contexts again.
          </p></dd><dt><span class="term">
          <code class="option">nottys</code>
        </span></dt><dd><p>
            Do not setup security context of the controlling terminal.
          </p></dd><dt><span class="term">
          <code class="option">debug</code>
        </span></dt><dd><p>
            Turn on debug messages via
            <span class="citerefentry"><span class="refentrytitle">syslog</span>(3)</span>.
          </p></dd><dt><span class="term">
          <code class="option">verbose</code>
        </span></dt><dd><p>
            Attempt to inform the user when security context is set.
          </p></dd><dt><span class="term">
          <code class="option">select_context</code>
        </span></dt><dd><p>
            Attempt to ask the user for a custom security context role.
            If MLS is on, ask also for sensitivity level.
          </p></dd><dt><span class="term">
          <code class="option">env_params</code>
        </span></dt><dd><p>
            Attempt to obtain a custom security context role from PAM environment.
            If MLS is on, obtain also sensitivity level.  This option and the
            select_context option are mutually exclusive.  The respective PAM
            environment variables are <span class="emphasis"><em>SELINUX_ROLE_REQUESTED</em></span>,
            <span class="emphasis"><em>SELINUX_LEVEL_REQUESTED</em></span>, and
            <span class="emphasis"><em>SELINUX_USE_CURRENT_RANGE</em></span>.  The first two variables
            are self describing and the last one if set to 1 makes the PAM module behave as
            if the use_current_range was specified on the command line of the module.
          </p></dd><dt><span class="term">
          <code class="option">use_current_range</code>
        </span></dt><dd><p>
            Use the sensitivity level of the current process for the user context
            instead of the default level. Also suppresses asking of the
            sensitivity level from the user or obtaining it from PAM environment.
          </p></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_selinux-types"></a>6.29.3. MODULE TYPES PROVIDED</h3></div></div></div><p>
      Only the <code class="option">session</code> module type is provided.
    </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_selinux-return_values"></a>6.29.4. RETURN VALUES</h3></div></div></div><div class="variablelist"><dl class="variablelist"><dt><span class="term">PAM_SUCCESS</span></dt><dd><p>
            The security context was set successfully.
          </p></dd><dt><span class="term">PAM_SESSION_ERR</span></dt><dd><p>
            Unable to get or set a valid context.
          </p></dd><dt><span class="term">PAM_USER_UNKNOWN</span></dt><dd><p>
            The user is not known to the system.
          </p></dd><dt><span class="term">PAM_BUF_ERR</span></dt><dd><p>
            Memory allocation error.
          </p></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_selinux-examples"></a>6.29.5. EXAMPLES</h3></div></div></div><pre class="programlisting">
auth     required  pam_unix.so
session  required  pam_permit.so
session  optional  pam_selinux.so
    </pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_selinux-author"></a>6.29.6. AUTHOR</h3></div></div></div><p>
        pam_selinux was written by Dan Walsh &lt;dwalsh@redhat.com&gt;.
      </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_securetty.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_shells.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">6.28. pam_securetty - limit root login to special devices </td><td width="20%" align="center"><a accesskey="h" href="Linux-PAM_SAG.html">Home</a></td><td width="40%" align="right" valign="top"> 6.30. pam_shells - check for valid login shell</td></tr></table></div></body></html>

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