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  • Committer: Teddy Hogeborn
  • Date: 2019-07-27 10:11:45 UTC
  • Revision ID: teddy@recompile.se-20190727101145-jnpbpf8220gldbcd
Add dracut(8) support

Add support for the dracut(8) system for generating initramfs image
files; dracut is an alternative to the "initramfs-tools" package.

* .bzrignore (dracut-module/password-agent): Ignore new binary file.
* dracut-module: New directory for the dracut module.
* INSTALL (Prerequisites/Libraries/Mandos Client): Add dracut as an
                                                   alternative to
                                                   initramfs-tools,
                                                   and also add GLib.
* Makefile (DRACUTMODULE, GLIB_CFLAGS, GLIB_LIBS): New.
  (CPROGS): Add "dracut-module/password-agent".
  (DOCS): Add "dracut-module/password-agent.8mandos".
  (dracut-module/password-agent.8mandos): New.
  (dracut-module/password-agent.8mandos.xhtml): - '' -
  (dracut-module/password-agent): - '' -
  (check): Add command to run tests of password-agent(8mandos).
  (install-client-nokey): Also install the dracut module directory,
                          its files, and the password-agent(8mandos)
                          manual page.
  (install-client): To update the initramfs image file, run
                    update-initramfs or dracut depending on what is
                    installed.
  (uninstall-client): - '' - and also uninstall the the files in the
                      dracut module directory, that directory itself,
                      and the password-agent(8mandos) manual page.
* debian/control (Build-Depends): Add "libglib2.0-dev (>=2.40)".
  (Package: mandos-client/Depends): Add "dracut (>= 044+241-3)" as an
                                    alternative dependency to
                                    initramfs-tools.
  (Package: mandos-client/Conflicts): New; set to
                                      "dracut-config-generic".
  (debian/mandos-client.README.Debian): Document alternative commands
                                        to update the initramfs image
                                        for when dracut is used.
* debian/mandos-client.postinst (update_initramfs): Use alternative
                                                    commands to update
                                                    the initramfs
                                                    image for when
                                                    dracut is used.
* debian/tests/control (password-agent, password-agent-suid): Add two
                                                              new tests.
* dracut-module/ask-password-mandos.path: New.
* dracut-module/ask-password-mandos.service: - '' -
* dracut-module/cmdline-mandos.sh: - '' -
* dracut-module/module-setup.sh: - '' -
* dracut-module/password-agent.c: - '' -
* dracut-module/password-agent.xml: - '' -
* initramfs-unpack: Use the dracut "skipcpio" command, if available.
                    Also be more flexible and try hard to detect where
                    compressed data starts.
* plugins.d/mandos-client.xml (SECURITY): Be more precise that the
                                          mandos-client binary might
                                          not always be setuid, but
                                          that the program assumes
                                          that it has been started
                                          that way.
* plugins.d/password-prompt.c: Add new "--prompt" option.
  (conflict_detection): First try to detect the new PID file of
                        plymouth.
  (main): Define and use new "prompt" variable.
* plugins.d/password-prompt.xml (SYNOPSIS): Show new --prompt option.
  (DESCRIPTION): Describe new behavior of looking for plymouth PID
                 file.
  (OPTIONS): Document new "--prompt" option.
  (ENVIRONMENT): Clarify that the CRYPTTAB_SOURCE and CRYPTTAB_NAME
                 environment variables are not used if the --prompt
                 option is used.  Remove unnecessarily specific
                 details about where the CRYPTTAB_SOURCE and
                 CRYPTTAB_NAME comes from, since this can now be
                 either initramfs-tools or dracut.
  (SEE ALSO): Remove superfluous crypttab(5) reference, and add commas
              to separate the other references.
* plugins.d/plymouth.c: Add new "--prompt" and "--debug" options.
  (debug): New global flag.
  (fprintf_plus): New function, used for debug output.
  (exec_and_wait): Add extra "const" to "argv" argument.
  (main): Define and use new "prompt" variable.  Add debug output.
  (main/options, main/parse_opt): New; used to parse options.
* plugins.d/plymouth.xml (SYNOPSIS): Show new options.
  (OPTIONS): Document new options.
  (ENVIRONMENT): Clarify that the cryptsource and crypttarget
                 environment variables are not used if the --prompt
                 option is used.  Remove unnecessarily specific
                 details about where the cryptsource and crypttarget
                 comes from, since this can now be either
                 initramfs-tools or dracut.
  (EXAMPLE): Add an example using an option.
  (SEE ALSO): Remove superfluous crypttab(5) reference.
* plugins.d/splashy.xml (ENVIRONMENT): Clarify that the cryptsource
                                       and crypttarget environment
                                       variables are not used if the
                                       --prompt option is used.
                                       Remove unnecessarily specific
                                       details about where the
                                       cryptsource and crypttarget
                                       comes from, since this can now
                                       be either initramfs-tools or
                                       dracut.
  (SEE ALSO): Remove superfluous crypttab(5) reference.
* plugins.d/usplash.xml (ENVIRONMENT): Clarify that the cryptsource
                                       and crypttarget environment
                                       variables are not used if the
                                       --prompt option is used.
                                       Remove unnecessarily specific
                                       details about where the
                                       cryptsource and crypttarget
                                       comes from, since this can now
                                       be either initramfs-tools or
                                       dracut.
  (SEE ALSO): Remove superfluous crypttab(5) reference.

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plugins.d/plymouth.xml
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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 COMMANDNAME "plymouth">
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<!ENTITY TIMESTAMP "2010-09-26">
 
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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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]>
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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@fukt.bsnet.se</email>
 
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          <email>belorn@recompile.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@fukt.bsnet.se</email>
 
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          <email>teddy@recompile.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>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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  <refsynopsisdiv>
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    <cmdsynopsis>
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      <command>&COMMANDNAME;</command>
 
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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><option>--debug</option></arg>
 
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    </cmdsynopsis>
 
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    <cmdsynopsis>
 
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      <command>&COMMANDNAME;</command>
 
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      <group choice="req">
 
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        <arg choice="plain"><option>--help</option></arg>
 
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        <arg choice="plain"><option>-?</option></arg>
 
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      </group>
 
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    </cmdsynopsis>
 
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    <cmdsynopsis>
 
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      <command>&COMMANDNAME;</command>
 
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      <arg choice="plain"><option>--usage</option></arg>
 
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    </cmdsynopsis>
 
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    <cmdsynopsis>
 
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      <command>&COMMANDNAME;</command>
 
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      <group choice="req">
 
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        <arg choice="plain"><option>--version</option></arg>
 
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        <arg choice="plain"><option>-V</option></arg>
 
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      </group>
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    </cmdsynopsis>
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  </refsynopsisdiv>
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  <refsect1 id="options">
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    <title>OPTIONS</title>
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    <para>
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      This program takes no options.
 
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      This program is commonly not invoked from the command line; it
 
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      is normally started by the <application>Mandos</application>
 
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      plugin runner, see <citerefentry><refentrytitle
 
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      >plugin-runner</refentrytitle><manvolnum>8mandos</manvolnum>
 
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      </citerefentry>.  Any command line options this program accepts
 
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      are therefore normally provided by the plugin runner, and not
 
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      directly.
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    </para>
 
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    <variablelist>
 
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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.  Note that using this option will
 
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            make this program ignore the <envar>cryptsource</envar>
 
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            and <envar>crypttarget</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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            Enable debug mode.  This will enable a lot of output to
 
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            standard error about what the program is doing.  The
 
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            program will still perform all other functions normally.
 
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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>--help</option></term>
 
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        <term><option>-?</option></term>
 
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        <listitem>
 
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          <para>
 
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            Gives a help message about options and their meanings.
 
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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>--usage</option></term>
 
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        <listitem>
 
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          <para>
 
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            Gives a short usage message.
 
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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>--version</option></term>
 
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        <term><option>-V</option></term>
 
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        <listitem>
 
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          <para>
 
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            Prints the program version.
 
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          </para>
 
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        </listitem>
 
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      </varlistentry>
 
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    </variablelist>
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  </refsect1>
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  <refsect1 id="exit_status">
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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, these environment variables will be assumed to
 
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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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            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 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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          <manvolnum>8mandos</manvolnum></citerefentry>, which might
 
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          have in turn inherited them from its calling process.
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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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          <command>askpass</command>, the default password prompter
 
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          from initramfs-tools.
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        </para>
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        </listitem>
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      </varlistentry>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><filename>/proc</filename></term>
 
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        <term><filename class="directory">/proc</filename></term>
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        <listitem>
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          <para>
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            To find the running <citerefentry><refentrytitle
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      daemon and starting a new one is ugly, but necessary as long as
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      it does not support aborting a password request.
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    </para>
 
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    <xi:include href="../bugs.xml"/>
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  </refsect1>
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  <refsect1 id="example">
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    </para>
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    <informalexample>
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      <para>
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        This program takes no options.
 
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        Normal invocation needs no options:
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      </para>
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      <para>
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        <userinput>&COMMANDNAME;</userinput>
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      </para>
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    </informalexample>
 
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    <informalexample>
 
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      <para>
 
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        Show a different prompt.
 
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      </para>
 
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      <para>
 
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        <userinput>&COMMANDNAME; --prompt=Password</userinput>
 
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      </para>
 
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    </informalexample>
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  </refsect1>
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  <refsect1 id="security">
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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>crypttab</refentrytitle>
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      <manvolnum>5</manvolnum></citerefentry>,
 
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      <citerefentry><refentrytitle>intro</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>proc</refentrytitle>