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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
	"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY COMMANDNAME "askpass-fifo">
<!ENTITY TIMESTAMP "2019-02-10">
<!ENTITY % common SYSTEM "../common.ent">
%common;
]>

<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
  <refentryinfo>
    <title>Mandos Manual</title>
    <!-- NWalsh’s docbook scripts use this to generate the footer: -->
    <productname>Mandos</productname>
    <productnumber>&version;</productnumber>
    <date>&TIMESTAMP;</date>
    <authorgroup>
      <author>
	<firstname>Björn</firstname>
	<surname>Påhlsson</surname>
	<address>
	  <email>belorn@recompile.se</email>
	</address>
      </author>
      <author>
	<firstname>Teddy</firstname>
	<surname>Hogeborn</surname>
	<address>
	  <email>teddy@recompile.se</email>
	</address>
      </author>
    </authorgroup>
    <copyright>
      <year>2008</year>
      <year>2009</year>
      <year>2010</year>
      <year>2011</year>
      <year>2012</year>
      <year>2013</year>
      <year>2014</year>
      <year>2015</year>
      <year>2016</year>
      <year>2017</year>
      <year>2018</year>
      <year>2019</year>
      <holder>Teddy Hogeborn</holder>
      <holder>Björn Påhlsson</holder>
    </copyright>
  </refentryinfo>
  
  <refmeta>
    <refentrytitle>&COMMANDNAME;</refentrytitle>
    <manvolnum>8mandos</manvolnum>
  </refmeta>
  
  <refnamediv>
    <refname><command>&COMMANDNAME;</command></refname>
    <refpurpose>Mandos plugin to get a password from a
    FIFO.</refpurpose>
  </refnamediv>
  
  <refsynopsisdiv>
    <cmdsynopsis>
      <command>&COMMANDNAME;</command>
    </cmdsynopsis>
  </refsynopsisdiv>
  
  <refsect1 id="description">
    <title>DESCRIPTION</title>
    <para>
      This program reads a password from a <acronym>FIFO</acronym> and
      outputs it to standard output.
    </para>
    <para>
      This program is not very useful on its own.  This program is
      really meant to run as a plugin in the <application
      >Mandos</application> client-side system, where it is used as a
      fallback and alternative to retrieving passwords from a
      <application >Mandos</application> server.
    </para>
    <para>
      This program is meant to be imitate a feature of the
      <command>askpass</command> program, so that programs written to
      interface with it can keep working under the
      <application>Mandos</application> system.
    </para>
  </refsect1>
  
  <refsect1 id="options">
    <title>OPTIONS</title>
    <para>
      This program takes no options.
    </para>
  </refsect1>
  
  <refsect1 id="exit_status">
    <title>EXIT STATUS</title>
    <para>
      If exit status is 0, the output from the program is the password
      as it was read.  Otherwise, if exit status is other than 0, the
      program was interrupted or encountered an error, and any output
      so far could be corrupt and/or truncated, and should therefore
      be ignored.
    </para>
  </refsect1>
  
  <refsect1 id="files">
    <title>FILES</title>
    <variablelist>
      <varlistentry>
	<term><filename>/lib/cryptsetup/passfifo</filename></term>
	<listitem>
	  <para>
	    This is the <acronym>FIFO</acronym> where this program
	    will read the password.  If it does not exist, it will be
	    created.
	  </para>
	</listitem>
      </varlistentry>
    </variablelist>
  </refsect1>
  
  <refsect1 id="bugs">
    <title>BUGS</title>
    <xi:include href="../bugs.xml"/>
  </refsect1>
  
  <refsect1 id="example">
    <title>EXAMPLE</title>
    <para>
      Note that normally, this program will not be invoked directly,
      but instead started by the Mandos <citerefentry><refentrytitle
      >plugin-runner</refentrytitle><manvolnum>8mandos</manvolnum>
      </citerefentry>.
    </para>
    <informalexample>
      <para>
	This program takes no options.
      </para>
      <para>
	<userinput>&COMMANDNAME;</userinput>
      </para>
    </informalexample>
  </refsect1>
  
  <refsect1 id="security">
    <title>SECURITY</title>
    <para>
      The only thing that could be considered worthy of note is
      this:  This program is meant to be run by <citerefentry>
      <refentrytitle>plugin-runner</refentrytitle><manvolnum
      >8mandos</manvolnum></citerefentry>, and will, when run
      standalone, outside, in a normal environment, immediately output
      on its standard output any presumably secret password it just
      received.  Therefore, when running this program standalone
      (which should never normally be done), take care not to type in
      any real secret password by force of habit, since it would then
      immediately be shown as output.
    </para>
  </refsect1>
  
  <refsect1 id="see_also">
    <title>SEE ALSO</title>
    <para>
      <citerefentry><refentrytitle>intro</refentrytitle>
      <manvolnum>8mandos</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>fifo</refentrytitle>
      <manvolnum>7</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>plugin-runner</refentrytitle>
      <manvolnum>8mandos</manvolnum></citerefentry>
    </para>
  </refsect1>
</refentry>
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