source: chapter08/tar.xml@ 1dbc435

<?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;
]>

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

  <sect1info condition="script">
    <productname>tar</productname>
    <productnumber>&tar-version;</productnumber>
    <address>&tar-url;</address>
  </sect1info>

  <title>Tar-&tar-version;</title>

  <indexterm zone="ch-system-tar">
    <primary sortas="a-Tar">Tar</primary>
  </indexterm>

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

    <para>The Tar package provides the ability to create tar archives as well
    as perform various other kinds of archive manipulation.  Tar can be used on
    previously created archives to extract files, to store additional files, or
    to update or list files which were already stored. </para>

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

      <seglistitem>
        <seg>&tar-fin-sbu;</seg>
        <seg>&tar-fin-du;</seg>
      </seglistitem>
    </segmentedlist>

  </sect2>

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

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

<screen><userinput remap="configure">FORCE_UNSAFE_CONFIGURE=1  \
./configure --prefix=/usr</userinput></screen>

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

      <varlistentry>
        <term><envar>FORCE_UNSAFE_CONFIGURE=1</envar></term>
        <listitem>
          <para>This forces the test for <function>mknod</function> to be run
          as <systemitem class="username">root</systemitem>.
          It is generally considered dangerous to run this test as
          the <systemitem class="username">root</systemitem> user, but as it
          is being run on a system that has only been
          partially built, overriding it is OK.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <para>Compile the package:</para>

<screen><userinput remap="make">make</userinput></screen>

    <para>To test the results, issue:</para>

<screen><userinput remap="test">make check</userinput></screen>

    <!-- On one system the -j4 improvement is 167s - 46s = 121s (72.46%) -->
    <note><para>The test time for Tar can be reduced significantly on a
    system with multiple cores.  To do this, append
    <command>TESTSUITEFLAGS=-j&lt;N&gt;</command> to the line above.  For
    instance, using -j4 can reduce the test time by over 70
    percent.</para></note>

    <para>One test, capabilities: binary store/restore, is known to fail if it is
    run because LFS lacks selinux, but will be skipped if the host kernel does
    not support extended attributes or security labels on the filesystem
    used for building LFS.</para>

    <para>Install the package:</para>

<screen><userinput remap="install">make install
make -C doc install-html docdir=/usr/share/doc/tar-&tar-version;</userinput></screen>

  </sect2>


  <sect2 id="contents-tar" role="content">
    <title>Contents of Tar</title>

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

      <seglistitem>
        <seg>tar</seg>
        <seg>/usr/share/doc/tar-&tar-version;</seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="tar">
        <term><command>tar</command></term>
        <listitem>
          <para>Creates, extracts files from, and lists the contents of archives,
          also known as tarballs</para>
          <indexterm zone="ch-system-tar tar">
            <primary sortas="b-tar">tar</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>