source: general/sysutils/dbus.xml@ 08de396

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY dbus-download-http "http://dbus.freedesktop.org/releases/dbus/dbus-&dbus-version;.tar.gz">
  <!ENTITY dbus-download-ftp  " ">
  <!ENTITY dbus-md5sum        "059fbe84e39fc99c67a14f15b1f39dff">
  <!ENTITY dbus-size          "1.8 MB">
  <!ENTITY dbus-buildsize     "86 MB (additional 26 MB installed)">
  <!ENTITY dbus-time          "0.35 SBU (additional 1.3 SBU for tests)">
]>

<sect1 id="dbus-launch" xreflabel="D-Bus-&dbus-version;/dbus-launch">
  <?dbhtml filename="dbus.html"?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>D-Bus-&dbus-version; (dbus-launch)</title>

  <indexterm zone="dbus-launch">
    <primary sortas="a-dbus-launch">dbus-launch</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to D-Bus (with Xorg)</title>

    <para>
      <application>D-Bus</application> was installed in LFS, but one program
      needs to be updated after Xorg is installed to properly support 
      window managers.  
    </para>

    <!-- &lfs75_checked; -->

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&dbus-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&dbus-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &dbus-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &dbus-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &dbus-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &dbus-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">D-Bus Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="xorg7-lib"/>
      (for <command>dbus-launch</command> program)
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      For the tests:
      <xref linkend="dbus-glib"/>,
      <xref linkend="dbus-python"/>, and
      <xref linkend="pygobject2"/>;
      for the API documentation:
      <xref linkend="doxygen"/>;
      for man pages and XML/HTML documentation:
      <xref linkend="xmlto"/>
    </para>

    <para condition="html" role="usernotes">User Notes:
      <ulink url="&blfs-wiki;/dbus"/>
    </para>
  </sect2>

  <sect2 role="installation">
    <title>Installation of D-Bus</title>

    <para>
      Build <application>D-Bus</application> by running the following commands: 
    </para>

<screen><userinput>./configure --prefix=/usr        \
            --sysconfdir=/etc    \
            --localstatedir=/var \
            --with-console-auth-dir=/run/console/ \
            --disable-static &amp;&amp;
make</userinput></screen>

    <para>
      See below for test instructions.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>install -m 755 dbus-launch /usr/bin</userinput></screen>

    <para>
      If you built the optional documentation, install it as the 
      <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>cp -a doc/api/{html,xml} /usr/share/doc/dbus-&dbus-version;</userinput></screen>
  
    <para>
      The dbus tests cannot be run until after <xref linkend="dbus-glib"/>
      has been installed.  They must be run as an unprivileged user from a
      local session. Tests fail through ssh. If you want to run only the unit
      tests, replace, below, <parameter>--enable-tests</parameter> by
      <parameter>--enable-embedded-tests</parameter>, otherwise,
      <xref linkend="dbus-python"/> has to be installed, before.
      The tests require passing additional parameters to
      <command>configure</command> and exposing additional functionality in
      the binaries. These interfaces are not intended to be used in a
      production build of <application>D-Bus</application>.  If you would
      like to run the tests, issue the following commands:
    </para>

<screen><userinput>make distclean                              &amp;&amp;
./configure --enable-tests --enable-asserts &amp;&amp;
make                                        &amp;&amp;
make check                                  &amp;&amp;
make distclean</userinput></screen>

    <para>
      If <command>run-test.sh</command> fails, it can be disabled with the
      following sed, before running the commands for the tests:
    </para>

<screen><userinput>sed -i -e 's:run-test.sh:$(NULL):g' test/name-test/Makefile.in</userinput></screen>

    <note><para>
      There has been a report that the tests may fail if running
      inside a Midnight Commander shell.
      You may get out-of-memory error messages when running the tests.
      These are normal and can be safely ignored.
    </para></note>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <parameter>--with-console-auth-dir=/run/console/</parameter>: This
      parameter specifies location of the
      <application>ConsoleKit</application> auth dir.
    </para>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/static-libraries.xml"/>

    <para>
      <parameter>--enable-tests</parameter>: Build extra parts of the code to
      support all tests. Configure will end with a NOTE warning about increased
      size of libraries and decreased security.
    </para>

    <para>
      <parameter>--enable-embedded-tests</parameter>: Build extra parts of the
      code to support only unit tests. Configure will end with a NOTE warning
      about increased size of libraries and decreased security.
    </para>

    <para>
      <parameter>--enable-asserts</parameter>: Enable debugging code to run
      assertions for statements normally assumed to be true. This prevents a
      warning that '<parameter>--enable-tests</parameter>' on its own is only
      useful for profiling and might not give true results for all tests, but
      adds its own NOTE that this should not be used in a production build.
    </para>

  </sect2>

  <sect2 role="configuration">
    <title>Configuring dbus</title>

    <sect3 id="dbus-config">
      <title>Config Files</title>

      <para>
        <filename>/etc/dbus-1/session.conf</filename>,
        <filename>/etc/dbus-1/system.conf</filename> and
        <filename>/etc/dbus-1/system.d/*</filename>
      </para>

      <indexterm zone="dbus-launch dbus-config">
        <primary sortas="e-etc-dbus-1-session.conf">/etc/dbus-1/session.conf</primary>
      </indexterm>

      <indexterm zone="dbus-launch dbus-config">
        <primary sortas="e-etc-dbus-1/system.conf">/etc/dbus-1/system.conf</primary>
      </indexterm>

      <indexterm zone="dbus-launch dbus-config">
        <primary sortas="e-etc-dbus-1-system.d-star">/etc/dbus-1/system.d/*</primary>
      </indexterm>

    </sect3>

    <sect3 id="dbus-session-config" xreflabel="D-Bus custom services directory">
      <title>Configuration Information</title>

      <para>
        The configuration files listed above should probably not be
        modified. If changes are required, you should create
        <filename>/etc/dbus-1/session-local.conf</filename> and/or
        <filename>/etc/dbus-1/system-local.conf</filename> and make any
        desired changes to these files.
     </para>

      <para>
        If any packages install a
        <application>D-Bus</application> <filename>.service</filename>
        file outside of the standard <filename
        class="directory">/usr/share/dbus-1/services</filename> directory,
        that directory should be added to the local session configuration.
        For instance, <filename
        class="directory">/usr/local/share/dbus-1/services</filename> can
        be added by performing the following commands as the
        <systemitem class="username">root</systemitem> user:
      </para>

<screen role="root"><userinput>cat &gt; /etc/dbus-1/session-local.conf &lt;&lt; "EOF"
<literal>&lt;!DOCTYPE busconfig PUBLIC
 "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd"&gt;
&lt;busconfig&gt;

  &lt;!-- Search for .service files in /usr/local --&gt;
  &lt;servicedir&gt;/usr/local/share/dbus-1/services&lt;/servicedir&gt;

&lt;/busconfig&gt;</literal>
EOF</userinput></screen>

    </sect3>

    <sect3  id="dbus-init">
      <title>Starting D-Bus</title>

      <para>
        There are many methods you can use to start a
        session daemon using the <command>dbus-launch</command> command. Review
        the <command>dbus-launch</command> man page for details about the
        available parameters and options. Here are some suggestions and
        examples:
      </para>

      <itemizedlist spacing="compact">
        <listitem>
          <para>
            Add <command>dbus-launch</command> to the line in the
            <filename>~/.xinitrc</filename> file that starts your graphical
            desktop environment.
          </para>
        </listitem>
        <listitem>
          <para>
            If you use <command>xdm</command> or some other display manager
            that calls the <filename>~/.xsession</filename> file, you can add
            <command>dbus-launch</command> to the line in your
            <filename>~/.xsession</filename> file that starts your graphical
            desktop environment. The syntax would be similar to the example in
            the <filename>~/.xinitrc</filename> file.
          </para>
        </listitem>
        <listitem>
          <para>
            The examples shown previously use
            <command>dbus-launch</command> to specify a program to be run. This
            has the benefit (when also using the
            <parameter>--exit-with-session</parameter> parameter) of stopping the
            session daemon when the specified program is stopped. You can also
            start the session daemon in your system or personal startup scripts
            by adding the following lines:
          </para>

<screen><userinput><literal># Start the D-Bus session daemon
eval `dbus-launch`
export DBUS_SESSION_BUS_ADDRESS</literal></userinput></screen>

          <para>
            This method will not stop the session daemon when you exit
            your shell, therefore you should add the following line to your
            <filename>~/.bash_logout</filename> file:
          </para>

<screen><userinput><literal># Kill the D-Bus session daemon
kill $DBUS_SESSION_BUS_PID</literal></userinput></screen>
        </listitem>

        <listitem>
          <para>
            A hint has been written that provides ways to start scripts
            using the KDM session manager of KDE. The concepts in this hint could
            possibly be used with other session managers as well. The hint is
            located at <ulink
            url="&hints-root;/downloads/files/execute-session-scripts-using-kdm.txt"/>.
          </para>
        </listitem>

      </itemizedlist>

    </sect3>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          dbus-launch
        </seg>
        <seg>
          None
        </seg>
        <seg>
          None
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="dbus-launch-program">
        <term><command>dbus-launch</command></term>
        <listitem>
          <para>
            is used to start <command>dbus-daemon</command> from a shell
            script. It  would  normally be called from a user's login
            scripts.
          </para>
          <indexterm zone="dbus-launch dbus-launch-program">
            <primary sortas="b-dbus-launch-program">dbus-launch</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>