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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="pwhistory_helper">
+
+ <refmeta>
+ <refentrytitle>pwhistory_helper</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo>
+ </refmeta>
+
+ <refnamediv id="pwhistory_helper-name">
+ <refname>pwhistory_helper</refname>
+ <refpurpose>Helper binary that transfers password hashes from passwd or shadow to opasswd</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis id="pwhistory_helper-cmdsynopsis">
+ <command>pwhistory_helper</command>
+ <arg choice="opt">
+ ...
+ </arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1 id="pwhistory_helper-description">
+
+ <title>DESCRIPTION</title>
+
+ <para>
+ <emphasis>pwhistory_helper</emphasis> is a helper program for the
+ <emphasis>pam_pwhistory</emphasis> module that transfers password hashes
+ from passwd or shadow file to the opasswd file and checks a password
+ supplied by user against the existing hashes in the opasswd file.
+ </para>
+
+ <para>
+ The purpose of the helper is to enable tighter confinement of
+ login and password changing services. The helper is thus called only
+ when SELinux is enabled on the system.
+ </para>
+
+ <para>
+ The interface of the helper - command line options, and input/output
+ data format are internal to the <emphasis>pam_pwhistory</emphasis>
+ module and it should not be called directly from applications.
+ </para>
+ </refsect1>
+
+ <refsect1 id='pwhistory_helper-see_also'>
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry>
+ <refentrytitle>pam_pwhistory</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>
+ </para>
+ </refsect1>
+
+ <refsect1 id='pwhistory_helper-author'>
+ <title>AUTHOR</title>
+ <para>
+ Written by Tomas Mraz based on the code originally in
+ <emphasis>pam_pwhistory and pam_unix</emphasis> modules.
+ </para>
+ </refsect1>
+
+</refentry>