source: BOOK/final-system/common/libcap.xml@ 2822eca

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

  <title>Libcap-&libcap-version;</title>

  <indexterm zone="ch-system-libcap">
    <primary sortas="a-Libcap">Libcap</primary>
  </indexterm>

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

    <para>Libcap is a library for getting and setting POSIX.1e
    (formerly POSIX 6) draft 15 capabilities.</para>

  </sect2>

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

    <para os="a">Compile the package:</para>

<screen os="b"><userinput>make</userinput></screen>

    <para os="c">This package does not come with a test suite.</para>

    <para os="d">Install the package:</para>

<screen os="e"><userinput>make RAISE_SETFCAP=no install
chmod -v 755 /lib/libcap.so.&libcap-version;
ln -sfv ../../lib/$(readlink /lib/libcap.so) /usr/lib/libcap.so
rm -v /lib/libcap.so
mv -v /lib/libcap.a /usr/lib</userinput></screen>

    <variablelist os="f">
      <title>The meaning of the make option:</title>

      <varlistentry>
        <term><parameter>RAISE_SETFCAP=no</parameter></term>
        <listitem>
          <para>This prevents <command>setcap</command> from being run on
          itself, which will fail if the kernel or file system does not
          support extended capabilities.</para>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

  <sect2 id="contents-libcap" role="content">
    <title>Contents of Libcap</title>

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

      <seglistitem>
        <seg>capsh, getcap, getpcaps, setcap</seg>
        <seg>libcap.[a,so]</seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="capsh">
        <term><command>capsh</command></term>
        <listitem>
          <para>Capability support and use can be explored and constrained
          with this tool</para>
          <indexterm zone="ch-system-libcap capsh">
            <primary sortas="b-capsh">capsh</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="getcap">
        <term><command>getcap</command></term>
        <listitem>
          <para>Examines file capabilities</para>
          <indexterm zone="ch-system-libcap getcap">
            <primary sortas="b-getcap">getcap</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="getpcaps">
        <term><command>getpcaps</command></term>
        <listitem>
          <para>Displays the capabilities on the queried process(es)</para>
          <indexterm zone="ch-system-libcap getpcaps">
            <primary sortas="b-getpcaps">getpcaps</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="setcap">
        <term><command>setcap</command></term>
        <listitem>
          <para>Sets file capabilities</para>
          <indexterm zone="ch-system-libcap setcap">
            <primary sortas="b-setcap">setcap</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libcap">
        <term><filename class="libraryfile">libcap</filename></term>
        <listitem>
          <para>Library for setting and clearing POSIX.1e capabilities</para>
          <indexterm zone="ch-system-libcap libcap">
            <primary sortas="c-libcap">libcap</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>