lfs-book/chapter06/acl.xml

<?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-acl" role="wrap">
  <?dbhtml filename="acl.html"?>

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

  <title>Acl-&acl-version;</title>

  <indexterm zone="ch-system-acl">
    <primary sortas="a-Acl">Acl</primary>
  </indexterm>

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

    <para>The Acl package contains utilities to administer Access Control Lists,
    which are used to define more fine-grained discretionary access rights for
    files and directories.</para>

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

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

  </sect2>

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

    <para>Modify the documentation directory so that it is a versioned
    directory:</para>

<screen><userinput remap="pre">sed -i -e 's|/@pkg_name@|&amp;-@pkg_version@|' include/builddefs.in</userinput></screen>

    <para>Fix some broken tests:</para>

<screen><userinput remap="pre">sed -i "s:| sed.*::g" test/{sbits-restore,cp,misc}.test</userinput></screen>

    <para>Additionally, fix a bug that causes <command>getfacl -e</command>
    to segfault on overly long group name:</para>

<screen><userinput remap="pre">sed -i -e "/TABS-1;/a if (x > (TABS-1)) x = (TABS-1);" \
    libacl/__acl_to_any_text.c</userinput></screen>

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

<screen><userinput remap="configure">./configure --prefix=/usr --libexecdir=/usr/lib</userinput></screen>

    <para>Compile the package:</para>

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

    <para>The Acl tests need to be run on a filesystem that supports access
    controls after <application>Coreutils</application> has been built with the
    Acl libraries.  If desired, return to this package and run <command>make -j1
    tests</command> after <application>Coreutils</application> has been built
    later in this chapter.</para>

    <para>Install the package:</para>

<screen><userinput remap="install">make install install-dev install-lib
chmod -v 755 /usr/lib/libacl.so</userinput></screen>

    <para>The shared library needs to be moved to
    <filename class="directory">/lib</filename>, and as a result the
    <filename class="extension">.so</filename> file in
    <filename class="directory">/usr/lib</filename> will need to be recreated:</para>

<screen><userinput remap="install">mv -v /usr/lib/libacl.so.* /lib
ln -sfv ../../lib/$(readlink /usr/lib/libacl.so) /usr/lib/libacl.so</userinput></screen>

  </sect2>

  <sect2 id="contents-acl" role="content">
    <title>Contents of Acl</title>

    <segmentedlist>
      <segtitle>Installed programs</segtitle>
      <segtitle>Installed library</segtitle>
      <segtitle>Installed directories</segtitle>

      <seglistitem>
        <seg>chacl, getfacl, and setacl</seg>
        <seg>libacl.{a,so}</seg>
        <seg>/usr/include/acl, /usr/share/doc/acl-&acl-version;</seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="chacl">
        <term><command>chacl</command></term>
        <listitem>
          <para>Changes the access control list of a file
          or directory.</para>
          <indexterm zone="ch-system-acl chacl">
            <primary sortas="b-chacl">chacl</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="getfacl">
        <term><command>getfacl</command></term>
        <listitem>
          <para>Gets file access control lists.</para>
          <indexterm zone="ch-system-acl getfacl">
            <primary sortas="b-getfacl">getfacl</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="setacl">
        <term><command>setacl</command></term>
        <listitem>
          <para>Sets file access control lists.</para>
          <indexterm zone="ch-system-acl setacl">
            <primary sortas="b-setacl">setacl</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libacl">
        <term><filename class="libraryfile">libacl</filename></term>
        <listitem>
          <para>Contains the <application>Acl</application> API functions.</para>
          <indexterm zone="ch-system-acl libacl">
            <primary sortas="c-libacl">libacl</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>