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Several memory leaks detected by valgrind fixed
A bugg fixed that could cause seg fault.

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plugins.d/password-prompt.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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        "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
 
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<!ENTITY VERSION "1.0">
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<!ENTITY COMMANDNAME "password-prompt">
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<!ENTITY TIMESTAMP "2019-07-27">
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<!ENTITY % common SYSTEM "../common.ent">
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%common;
 
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<!ENTITY TIMESTAMP "2008-09-04">
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]>
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<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
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    <title>Mandos Manual</title>
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    <!-- NWalsh’s docbook scripts use this to generate the footer: -->
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    <productname>Mandos</productname>
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    <productnumber>&version;</productnumber>
 
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    <productnumber>&VERSION;</productnumber>
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    <date>&TIMESTAMP;</date>
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    <authorgroup>
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      <author>
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        <firstname>Björn</firstname>
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        <surname>Påhlsson</surname>
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        <address>
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          <email>belorn@recompile.se</email>
 
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          <email>belorn@fukt.bsnet.se</email>
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        </address>
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      </author>
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      <author>
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        <firstname>Teddy</firstname>
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        <surname>Hogeborn</surname>
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        <address>
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          <email>teddy@recompile.se</email>
 
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          <email>teddy@fukt.bsnet.se</email>
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        </address>
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      </author>
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    </authorgroup>
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    <copyright>
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      <year>2008</year>
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      <year>2009</year>
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      <year>2010</year>
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      <year>2011</year>
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      <year>2012</year>
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      <year>2013</year>
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      <year>2014</year>
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      <year>2015</year>
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      <year>2016</year>
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      <year>2017</year>
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      <year>2018</year>
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      <year>2019</year>
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      <holder>Teddy Hogeborn</holder>
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      <holder>Björn Påhlsson</holder>
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    </copyright>
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        >PREFIX</replaceable></arg>
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      </group>
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      <sbr/>
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      <arg choice="opt">
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        <option>--prompt <replaceable>PROMPT</replaceable></option>
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      </arg>
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      <arg choice="opt"><option>--debug</option></arg>
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    </cmdsynopsis>
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    <cmdsynopsis>
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    <title>DESCRIPTION</title>
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    <para>
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      All <command>&COMMANDNAME;</command> does is prompt for a
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      password and output any given password to standard output.
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    </para>
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    <para>
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      This program is not very useful on its own.  This program is
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      really meant to run as a plugin in the <application
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      >Mandos</application> client-side system, where it is used as a
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      fallback and alternative to retrieving passwords from a
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      <application >Mandos</application> server.
 
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      password and output any given password to standard output.  This
 
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      is not very useful on its own.  This program is really meant to
 
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      run as a plugin in the <application>Mandos</application>
 
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      client-side system, where it is used as a fallback and
 
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      alternative to retrieving passwords from a <application
 
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      >Mandos</application> server.
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    </para>
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    <para>
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      This program is little more than a <citerefentry><refentrytitle
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      wrapper, although actual use of that function is not guaranteed
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      or implied.
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    </para>
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    <para>
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      This program tries to detect if a Plymouth daemon
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      (<citerefentry><refentrytitle
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      >plymouthd</refentrytitle><manvolnum>8</manvolnum></citerefentry>)
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      is running, by looking for a
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      <filename>/run/plymouth/pid</filename> file or a process named
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      <quote><literal>plymouthd</literal></quote>.  If it is detected,
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      this process will immediately exit without doing anything.
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    </para>
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  </refsect1>
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  <refsect1 id="options">
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      </varlistentry>
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      <varlistentry>
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        <term><option>--prompt=<replaceable
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        >PROMPT</replaceable></option></term>
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        <listitem>
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          <para>
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            The password prompt.  Using this option will make this
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            program ignore the <envar>CRYPTTAB_SOURCE</envar> and
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            <envar>CRYPTTAB_NAME</envar> environment variables.
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          </para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><option>--debug</option></term>
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        <listitem>
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          <para>
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    <title>ENVIRONMENT</title>
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    <variablelist>
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      <varlistentry>
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        <term><envar>CRYPTTAB_SOURCE</envar></term>
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        <term><envar>CRYPTTAB_NAME</envar></term>
 
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        <term><envar>cryptsource</envar></term>
 
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        <term><envar>crypttarget</envar></term>
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        <listitem>
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          <para>
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            If set, and if the <option>--prompt</option> option is not
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            used, these environment variables will be assumed to
 
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            If set, these environment variables will be assumed to
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            contain the source device name and the target device
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            mapper name, respectively, and will be shown as part of
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            the prompt.
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        <para>
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          These variables will normally be inherited from
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          <citerefentry><refentrytitle>plugin-runner</refentrytitle>
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          <manvolnum>8mandos</manvolnum></citerefentry>, which might
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          have in turn inherited them from its calling process.
 
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          <manvolnum>8mandos</manvolnum></citerefentry>, which will
 
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          normally have inherited them from
 
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          <filename>/scripts/local-top/cryptroot</filename> in the
 
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          initial <acronym>RAM</acronym> disk environment, which will
 
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          have set them from parsing kernel arguments and
 
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          <filename>/conf/conf.d/cryptroot</filename> (also in the
 
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          initial RAM disk environment), which in turn will have been
 
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          created when the initial RAM disk image was created by
 
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          <filename
 
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          >/usr/share/initramfs-tools/hooks/cryptroot</filename>, by
 
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          extracting the information of the root file system from
 
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          <filename >/etc/crypttab</filename>.
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        </para>
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        <para>
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          This behavior is meant to exactly mirror the behavior of
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          <command>askpass</command>, the default password prompter
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          from initramfs-tools.
 
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          <command>askpass</command>, the default password prompter.
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        </para>
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        </listitem>
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      </varlistentry>
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  <refsect1 id="bugs">
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    <title>BUGS</title>
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    <xi:include href="../bugs.xml"/>
 
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    <para>
 
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      None are known at this time.
 
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    </para>
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  </refsect1>
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  <refsect1 id="example">
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  <refsect1 id="see_also">
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    <title>SEE ALSO</title>
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    <para>
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      <citerefentry><refentrytitle>intro</refentrytitle>
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      <manvolnum>8mandos</manvolnum></citerefentry>,
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      <citerefentry><refentrytitle>mandos-client</refentrytitle>
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      <manvolnum>8mandos</manvolnum></citerefentry>,
 
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      <citerefentry><refentrytitle>crypttab</refentrytitle>
 
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      <manvolnum>5</manvolnum></citerefentry>
 
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      <citerefentry><refentrytitle>password-request</refentrytitle>
 
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      <manvolnum>8mandos</manvolnum></citerefentry>
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      <citerefentry><refentrytitle>plugin-runner</refentrytitle>
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      <manvolnum>8mandos</manvolnum></citerefentry>,
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      <citerefentry><refentrytitle>plymouthd</refentrytitle>
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      <manvolnum>8</manvolnum></citerefentry>
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    </para>
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  </refsect1>
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</refentry>