source: lxde/apps/lxdm-systemd.xml@ d11d80f

<?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;

  <!-- Place this in the general.ent file
  <!ENTITY TEMPLATE-version "">
  -->

  <!ENTITY lxdm-download-http "http://distfiles.alpinelinux.org/distfiles/lxdm-&lxdm-version;.tar.xz">
  <!ENTITY lxdm-download-ftp  "">
  <!ENTITY lxdm-md5sum        "a51686720e606ca456d7f56ae4159d1f">
  <!ENTITY lxdm-size          "232 KB">
  <!ENTITY lxdm-buildsize     "4.6 MB">
  <!ENTITY lxdm-time          "less than 0.1 SBU ">
]>

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

  <sect1info>
    <othername>$LastChangedBy: cjg $</othername>
    <date>$Date: 2014-08-31 16:03:10 +1200 (Sun, 31 Aug 2014) $</date>
  </sect1info>

  <title>LXDM-&lxdm-version;</title>

  <indexterm zone="lxdm">
    <primary sortas="a-LXDM">LXDM</primary>
  </indexterm>

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

    <para>
      The <application>LXDM</application> is a
      lightweight display manager for the <application>LXDE</application> desktop. It can also be used as an
      alternative to <application>GNOME's</application> <application>GDM</application> or
      <application>KDE's</application> <application>KDM</application>.
    </para>

    &lfs76_checked;

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

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

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="gtk2"/>
      <xref linkend="iso-codes"/> and
      <xref linkend="librsvg"/> (runtime, for default theme background)
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
     <xref linkend="linux-pam"/>
    </para>
    
    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="gtk3"/>
    </para>

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

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

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

<screen><userinput>./configure --prefix=/usr             \
                               --sysconfdir=/etc         \
                               --with-pam                \
                               --disable-consolekit      \
                               --with-systemdsystemunitdir=/lib/systemd/system &amp;&amp;
make</userinput></screen>

    <para>
      This package does not come with a test suite.
    </para>

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

<screen role="root"><userinput>make install &amp;&amp;
sed -e "/pam_selinux.so/d" -i pam/lxdm &amp;&amp;
awk '/system-auth/{c++;if(c==2){sub("system-auth","system-account");}}1' pam/lxdm 2&gt;&amp;1 | tee /etc/pam.d/lxdm</userinput></screen>
  </sect2>

  <!--Optional section-->
  <sect2 role="commands">
    <title>Command Explanations</title>
    <para>
      <command>sed -e "/pam_selinux.so/d" -i pam/lxdm</command>: This command removes
      the selinux pam module as selinux is not part of blfs.
    </para>

    <para>
      <command>awk '/system-auth/{c++;if(c==2){sub("system-auth","system-account");}}1'</command>:
      This command repaces the second instance of system-auth with system-account to make logind
      work correctly.
    </para>

    <para>
      <option>--with-pam</option>: This option enables use of pam authentication.
    </para>

    <para>
      <option>--disable-consolekit</option>: This option disables the use of
      <application>consolekit</application> as it is not used on a
      <application>systemd</application> system.
    </para>

    <para>
      <option>--with-systemdsystemunitdir=/lib/systemd/system</option>: This option
      ensures that the systemd unit file gets installed in the correct location.
    </para>

  </sect2>

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

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

      <para>
        <filename>/etc/lxdm/lxdm.conf</filename>
      </para>

      <indexterm zone="lxdm lxdm-config">
        <primary sortas="e-etc-lxdm-lxdm.conf">/etc/lxdm/lxdm.conf</primary>
      </indexterm>

    </sect3>

    <sect3>
      <title>Configuration Information</title>

      <para>
        The LXDM daemon is configured using the
        <filename>/etc/lxdm/lxdm.conf</filename> file.
        Within this file you can set a default session by uncommenting
        the line: session=/usr/bin/startlxde and replacing startlxde 
        with your session of choice. For <application>GNOME</application>
        session=/usr/bin/gnome-session.  For <application>OPENBOX</application>
        session=/usr/bin/openbox-session and for <application>XFCE</application>
        session=/usr/bin/startxfce4.
      </para>

      <para>
        It is also possible to set the preferred session on a per-user basis by
        editing the ~/.dmrc file for each user and adding:
        <screen><literal>
        [Desktop]
        Session=xfce</literal></screen>
      </para>

      <para>
        To prevent the possibility of lxdm not cleanly logging out a users session
        add the following to the <filename>/etc/lxdm/PostLogout</filename> as the
        <systemitem class="username">root</systemitem> user:
      </para>

<screen role="root"><userinput>cat &gt; /etc/lxdm/PostLogout &lt;&lt; "EOF"
# Terminate current user session
/bin/loginctl terminate-session $XDG_SESSION_ID

# Restart lxdm
/bin/systemctl restart lxdm.service
EOF</userinput></screen>

    </sect3>

   <sect3 id="lxdm-init">
      <title>Systemd Units</title>

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

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

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

    </sect3>
  
  </sect2>
  <!--Required section-->
  <sect2 role="content">
    <title>Contents</title>

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

      <seglistitem>
        <seg>
          lxdm-config, lxdm and lxdm-binary.
        </seg>
        <seg>
          None.
        </seg>
        <seg>
          /etc/lxdm, /etc/pam.d, and
          /usr/share/lxdm.
        </seg>
      </seglistitem>
    </segmentedlist>

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

      <!-- If the program or library name conflicts (is the same) as the
      package name, add -prog or -lib to the varlistentry entity id
      and the 2nd entry of the indexterm zone entity -->

      <varlistentry id="lxdm-prog">
        <term><command>lxdm</command></term>
        <listitem>
          <para>
            Is the lxdm daeamon.
          </para>
          <indexterm zone="lxdm lxdm-prog">
            <primary sortas="b-lxdm">lxdm</primary>
          </indexterm>
        </listitem>
      </varlistentry>
    </variablelist>
  </sect2>
</sect1>