source: general/sysutils/upower.xml@ f8b4f14

<?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 upower-download-http "https://gitlab.freedesktop.org/upower/upower/-/archive/v&upower-version;/upower-v&upower-version;.tar.bz2">
  <!ENTITY upower-download-ftp  " ">
  <!ENTITY upower-md5sum        "4fba71838a9ba0db6f140418eddbe2b7">
  <!ENTITY upower-size          "128 KB">
  <!ENTITY upower-buildsize     "4.9 MB (add 1.3 MB for tests)">
  <!ENTITY upower-time          "less than 0.1 SBU (using parallelism=4, add 0.6 SBU for tests)">
]>

<sect1 id="upower" xreflabel="UPower-&upower-version;">
  <?dbhtml filename="upower.html"?>


  <title>UPower-&upower-version;</title>

  <indexterm zone="upower">
    <primary sortas="a-UPower">UPower</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to UPower</title>

    <para>
      The <application>UPower</application> package provides an interface for
      enumerating power devices, listening to device events and querying history
      and statistics. Any application or service on the system can access the
      org.freedesktop.UPower service via the system message bus.
    </para>

    &lfs113_checked;

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

    <bridgehead renderas="sect3">UPower Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="libgudev"/>,
      <xref linkend="libusb"/>, and
      <xref linkend="polkit"/>
    </para>

    <bridgehead renderas="sect4">Optional (Required if building GNOME)</bridgehead>
    <para role="optional">
      <xref linkend="gobject-introspection"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="gtk-doc"/>,
      <xref linkend="libxslt"/>,
      <xref linkend="docbook-xsl"/>,
      <xref linkend="pygobject3"/>,
      <xref linkend="python-dbusmock"/>,
      <xref linkend="umockdev"/> (for part of the test suite), and
      <ulink url="https://libimobiledevice.org/">libimobiledevice</ulink>
    </para>

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

  <sect2 role="kernel" id="upower-kernel" revision="systemd">
    <!-- With UPower-0.9.11's hardening of the systemd unit file,
         User Namespace Support (CONFIG_USER_NS) is now required. Without this,
         you will get "ERROR 213/USER" out of a 'systemctl start upower'. -->
    <title>Kernel Configuration</title>

    <para>
      Enable the following options in the kernel configuration and recompile the
      kernel if necessary:
    </para>

 <screen><literal>General Setup ---&gt;
    [*] Namespaces support ---&gt;     [CONFIG_NAMESPACES]
       [*] User namespace           [CONFIG_USER_NS]</literal></screen>

    <indexterm zone="upower upower-kernel">
      <primary sortas="d-upower">upower</primary>
    </indexterm>
  </sect2>

  <sect2 role="installation">
    <title>Installation of UPower</title>

    <para>
      First, remove an unneeded dependency from a test:
    </para>

<screen><userinput>sed '/parse_version/d' -i src/linux/integration-test.py</userinput></screen>

    <para>
      Install <application>UPower</application> by running the following
      commands:
    </para>

<screen revision="sysv"><userinput>mkdir build &amp;&amp;
cd    build &amp;&amp;

meson setup ..                  \
      --prefix=/usr             \
      --buildtype=release       \
      -Dgtk-doc=false           \
      -Dman=false               \
      -Dsystemdsystemunitdir=no \
      -Dudevrulesdir=/usr/lib/udev/rules.d &amp;&amp;
ninja</userinput></screen>

<screen revision="systemd"><userinput>mkdir build                         &amp;&amp;
cd    build                         &amp;&amp;
meson setup ..            \
      --prefix=/usr       \
      --buildtype=release \
      -Dgtk-doc=false     \
      -Dman=false         &amp;&amp;
ninja</userinput></screen>

    <!-- On my system with LANG=zh_CN.UTF-8, one test attempted to compare
         Chinese error message with English references and failed.
         LC_ALL=C fixes the problem.  -->
    <para>
      To test the results, issue: <command>LC_ALL=C ninja test</command>. Some
      checks may not pass due to missing files. Test suite should be run from
      a local GUI session started with dbus-launch.
    </para>

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

<screen role="root"><userinput>ninja install</userinput></screen>

  </sect2>

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

    <para>
      <parameter>-Dgtk-doc=false</parameter>: Prevents building the
      documentation. Remove this if you have <application>GTK-Doc</application>
      installed and wish to build the documentation.
    </para>

    <para>
      <parameter>-Dman=false</parameter>: Prevents building the
      manual pages. Remove this if you have <xref linkend='libxslt'/> and
      <xref linkend='docbook-xsl'/> installed and wish to build the manual
      pages.
    </para>

    <para revision="sysv">
      <parameter>-Dsystemdsystemunitdir=no</parameter>: Removes
      the dependency on <application>systemd</application>.
    </para>

    <para revision="sysv">
      <parameter>-Dudevrulesdir=/usr/lib/udev/rules.d</parameter>: Tells
      the build system where to install <application>udev</application>
      rules because the information is missing in
      <filename>/usr/lib/pkgconfig/libudev.pc</filename>
    </para>

  </sect2>

  <sect2 role="configuration" revision="systemd">

    <title>Configuring UPower</title>
<!-- timer statistics have been removed from kernel (since 4.11)
     I do not know if there is a replacement. See
     https://patchwork.kernel.org/patch/9561519
     and https://bugs.freedesktop.org/show_bug.cgi?id=100626

    <para>
      To use the command <command>upower -w</command> for information about
      processor wakeups (this command is used by <phrase revision="sysv">
      <ulink url="&gnome-download-http;/gnome-power-manager/">gnome-power-manager</ulink></phrase><phrase revision="systemd"><xref linkend="gnome-power-manager"/></phrase>)
      you need to enable CONFIG_TIMER_STATS.  This is achieved in
      <command>make menuconfig</command> by going to the &apos;kernel-hacking&apos;
      menu and selecting &apos;Collect kernel timers statistics&apos;.
    </para>
-->
    <sect3  id="upower-init">
      <title>Systemd Unit</title>

      <para>
        To start the <command>UPower</command> service at boot,
        enable the previously installed systemd unit by
        running the following command as the
        <systemitem class="username">root</systemitem> user:
      </para>

      <indexterm zone="upower upower-init">
        <primary sortas="f-upower">upower</primary>
      </indexterm>

<screen role="root"><userinput>systemctl enable upower</userinput></screen>

    </sect3>

  </sect2>

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

    <segmentedlist>
      <segtitle>Installed Program<!--
See below... <phrase revision="systemd">s</phrase>--></segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          upower
<!-- <phrase revision="systemd"> and upowerd</phrase>
Upowerd should not be listed, as it is in /usr/libexec, and is not supposed
to be run by a user. Furthermore, upowerd is also in sysv, and there is no
reason so single out systemd here. -->
        </seg>
        <seg>
          libupower-glib.so
        </seg>
        <seg>
          /etc/UPower,
          /usr/include/libupower-glib, and
          /var/lib/upower
        </seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="upower-prog">
        <term><command>upower</command></term>
        <listitem>
          <para>
            is the <application>UPower</application> command line tool
          </para>
          <indexterm zone="upower upower-prog">
            <primary sortas="b-upower">upower</primary>
          </indexterm>
        </listitem>
      </varlistentry>
<!-- See above
      <varlistentry id="upowerd" revision="systemd">
        <term><command>upowerd</command></term>
        <listitem>
          <para>
            is the <application>UPower</application> Daemon. It provides the
            org.freedesktop.UPower service on the system message bus.
          </para>
          <indexterm zone="upower upowerd">
            <primary sortas="b-upowerd">upowerd</primary>
          </indexterm>
        </listitem>
      </varlistentry>-->

      <varlistentry id="libupower-glib">
        <term><filename class="libraryfile">libupower-glib.so</filename></term>
        <listitem>
          <para>
            contains the <application>UPower</application> API functions
          </para>
          <indexterm zone="upower libupower-glib">
            <primary sortas="c-libupower-glib">libupower-glib.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>