lfs-book/chapter06/less.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
  "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../general.ent">
  %general-entities;
]>

<sect1 id="ch-system-less" role="wrap">
  <?dbhtml filename="less.html"?>

  <title>Less-&less-version;</title>

  <indexterm zone="ch-system-less">
    <primary sortas="a-Less">Less</primary>
  </indexterm>

  <sect2 role="package">
    <title/>

    <para>The Less package contains a text file viewer.</para>

    <segmentedlist>
      <segtitle>&buildtime;</segtitle>
      <segtitle>&diskspace;</segtitle>

      <seglistitem>
        <seg>&less-ch6-sbu;</seg>
        <seg>&less-ch6-du;</seg>
      </seglistitem>
    </segmentedlist>

  </sect2>

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

    <para>Apply a patch that prevents Less from using a deprecated function:
    </para>

<screen><userinput>patch -Np1 -i ../&less-signal_fix-patch;</userinput></screen>

    <para>Prepare Less for compilation:</para>

<screen><userinput>./configure --prefix=/usr --sysconfdir=/etc</userinput></screen>

    <variablelist>
      <title>The meaning of the configure options:</title>

      <varlistentry>
        <term><parameter>--sysconfdir=/etc</parameter></term>
        <listitem>
          <para>This option tells the programs created by the package to look
          in <filename class="directory">/etc</filename> for the configuration
          files.</para>
        </listitem>
      </varlistentry>

    </variablelist>

    <para>Compile the package:</para>

<screen><userinput>make</userinput></screen>

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

    <para>Install the package:</para>

<screen><userinput>make install</userinput></screen>

  </sect2>

  <sect2 id="contents-less" role="content">
    <title>Contents of Less</title>

    <segmentedlist>
      <segtitle>Installed programs</segtitle>

      <seglistitem>
        <seg>less, lessecho, and lesskey</seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="less">
        <term><command>less</command></term>
        <listitem>
          <para>A file viewer or pager; it displays the contents of the given
          file, letting the user scroll, find strings, and jump to marks</para>
          <indexterm zone="ch-system-less less">
            <primary sortas="b-less">less</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="lessecho">
        <term><command>lessecho</command></term>
        <listitem>
          <para>Needed to expand meta-characters, such as <emphasis>*</emphasis>
          and <emphasis>?</emphasis>, in filenames on Unix systems</para>
          <indexterm zone="ch-system-less lessecho">
            <primary sortas="b-lessecho">lessecho</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="lesskey">
        <term><command>lesskey</command></term>
        <listitem>
          <para>Used to specify the key bindings for <command>less</command></para>
          <indexterm zone="ch-system-less lesskey">
            <primary sortas="b-lesskey">lesskey</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>