Add recvfile support with splice() on Linux

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<?xml version="1.0" encoding="UTF-8"?>
<refentry id="afp.conf.5">
  <refmeta>
    <refentrytitle>afp.conf</refentrytitle>

    <manvolnum>5</manvolnum>

    <refmiscinfo class="date">13 Sep 2013</refmiscinfo>

    <refmiscinfo class="source">@NETATALK_VERSION@</refmiscinfo>
  </refmeta>

  <refnamediv>
    <refname>afp.conf</refname>

    <refpurpose>Netatalk configuration file <indexterm>
        <primary>afp.conf</primary>
      </indexterm></refpurpose>
  </refnamediv>

  <refsect1>
    <title>SYNOPSIS</title>

    <para>The <filename>afp.conf</filename> file is the configuration file for
    the <emphasis role="bold">Netatalk</emphasis> AFP file server.</para>

    <para>All AFP specific configuration and AFP volume definitions are done
    via this file.</para>
  </refsect1>

  <refsect1 id="FILEFORMATSECT">
    <title>FILE FORMAT</title>

    <para>The file consists of sections and parameters. A section begins with
    the name of the section in square brackets and continues until the next
    section begins. Sections contain parameters of the form: <programlisting>
    <replaceable>name</replaceable> = <replaceable>value </replaceable>
    </programlisting></para>

    <para>The file is line-based - that is, each newline-terminated line
    represents either a comment, a section name or a parameter.</para>

    <para>Section and parameter names are case sensitive.</para>

    <para>Only the first equals sign in a parameter is significant. Whitespace
    before or after the first equals sign is discarded. Leading, trailing and
    internal whitespace in section and parameter names is irrelevant. Leading
    and trailing whitespace in a parameter value is discarded. Internal
    whitespace within a parameter value is retained verbatim.</para>

    <para>Any line beginning with a semicolon (<quote>;</quote>) or a hash
    (<quote>#</quote>) character is ignored, as are lines containing only
    whitespace.</para>

    <para>Any line ending in a <quote> <literal>\</literal> </quote> is
    continued on the next line in the customary UNIX fashion.</para>

    <para>The values following the equals sign in parameters are all either a
    string (no quotes needed) or a boolean, which may be given as yes/no, 1/0
    or true/false. Case is not significant in boolean values, but is preserved
    in string values. Some items such as create masks are numeric.</para>

    <para>The parameter <option>include =
    <replaceable>path</replaceable></option> allows you to include one config
    file inside another. The file is included literally, as though typed in
    place. Nested includes are not supported.</para>
  </refsect1>

  <refsect1>
    <title>SECTION DESCRIPTIONS</title>

    <para>Each section in the configuration file (except for the [Global]
    section) describes a shared resource (known as a <quote>volume</quote>).
    The section name is the name of the volume and the parameters within the
    section define the volume attributes and options.</para>

    <para>There are two special sections, [Global] and [Homes], which are
    described under <emphasis>special sections</emphasis>. The following notes
    apply to ordinary section descriptions.</para>

    <para>A volume consists of a directory to which access is being given plus
    a description of the access rights which are granted to the user of the
    service. For volumes the <option>path</option> option must specify the
    directory to share.</para>

    <para>Any volume section without <option>path</option> option is
    considered a <emphasis>vol preset</emphasis> which can be selected in
    other volume sections via the <option>vol preset</option> option and
    constitutes defaults for the volume. For any option specified both in a
    preset <emphasis>and</emphasis> in a volume section the volume section
    setting completely substitutes the preset option.</para>

    <para>The access rights granted by the server are masked by the access
    rights granted to the specified or guest UNIX user by the host system. The
    server does not grant more access than the host system grants.</para>

    <para>The following sample section defines an AFP volume. The user has
    full access to the path <filename>/foo/bar</filename>. The share is
    accessed via the share name <literal>baz</literal>: <programlisting> [baz]
    path = /foo/bar </programlisting></para>
  </refsect1>

  <refsect1>
    <title>SPECIAL SECTIONS</title>

    <refsect2>
      <title>The [Global] section</title>

      <para>Parameters in this section apply to the server as a whole.
      Parameters denoted by a (G) below are must be set in this
      section.</para>
    </refsect2>

    <refsect2>
      <title>The [Homes] section</title>

      <para>This section enable sharing of the UNIX server user home
      directories. Specifying an optional <option>path</option> parameter
      means that not the whole user home will be shared but the subdirectory
      <option>path</option>. It is necessary to define the <option>basedir
      regex</option> option. It should be a regex which matches the parent
      directory of the user homes. Parameters denoted by a (H) belong to
      volume sections. The optional parameter <option>home name</option> can
      be used to change the AFP volume name which <emphasis>$u's
      home</emphasis> by default. See below under VARIABLE
      SUBSTITUTIONS.</para>

      <para>The following example illustrates this. Given all user home
      directories are stored under <filename>/home</filename>:
      <programlisting> [Homes]
      path = afp-data
      basedir regex = /home</programlisting> For a user
      <emphasis>john</emphasis> this results in an AFP home volume with a path
      of <filename>/home/john/afp-data</filename>.</para>

      <para>If <option>basedir regex</option> contains symlink, set the
      canonicalized absolute path. When <filename>/home</filename> links to
      <filename>/usr/home</filename>: <programlisting> [Homes]
      basedir regex = /usr/home</programlisting></para>
    </refsect2>
  </refsect1>

  <refsect1>
    <title>PARAMETERS</title>

    <para>Parameters define the specific attributes of sections.</para>

    <para>Some parameters are specific to the [Global] section (e.g.,
    <emphasis>log type</emphasis>). All others are permissible only in volume
    sections. The letter <emphasis>G</emphasis> in parentheses indicates that
    a parameter is specific to the [Global] section. The letter
    <emphasis>V</emphasis> indicates that a parameter can be specified in a
    volume specific section.</para>
  </refsect1>

  <refsect1>
    <title>VARIABLE SUBSTITUTIONS</title>

    <para>You can use variables in volume names. The use of variables in paths
    is not supported for now.</para>

    <orderedlist>
      <listitem>
        <para>if you specify an unknown variable, it will not get
        converted.</para>
      </listitem>

      <listitem>
        <para>if you specify a known variable, but that variable doesn't have
        a value, it will get ignored.</para>
      </listitem>
    </orderedlist>

    <para>The variables which can be used for substitutions are:</para>

    <variablelist>
      <varlistentry>
        <term>$b</term>

        <listitem>
          <para>basename</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>$c</term>

        <listitem>
          <para>client's ip address</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>$d</term>

        <listitem>
          <para>volume pathname on server</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>$f</term>

        <listitem>
          <para>full name (contents of the gecos field in the passwd
          file)</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>$g</term>

        <listitem>
          <para>group name</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>$h</term>

        <listitem>
          <para>hostname</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>$i</term>

        <listitem>
          <para>client's ip, without port</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>$s</term>

        <listitem>
          <para>server name (this can be the hostname)</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>$u</term>

        <listitem>
          <para>user name (if guest, it is the user that guest is running
          as)</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>$v</term>

        <listitem>
          <para>volume name</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>$$</term>

        <listitem>
          <para>prints dollar sign ($)</para>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1>
    <title>EXPLANATION OF GLOBAL PARAMETERS</title>

    <refsect2>
      <title>Authentication Options</title>

      <variablelist>
        <varlistentry>
          <term>ad domain = <parameter>DOMAIN</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Append @DOMAIN to username when authenticating. Useful in
            Active Directory environments that otherwise would require the
            user to enter the full user@domain string.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>admin auth user = <parameter>user</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Specifying eg "<option>admin auth user = root</option>"
            whenever a normal user login fails, afpd will try to authenticate
            as the specified <option>admin auth user</option>. If this
            succeeds, a normal session is created for the original connecting
            user. Said differently: if you know the password of <option>admin
            auth user</option>, you can authenticate as any other user.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>k5 keytab = <replaceable>path</replaceable>
          <type>(G)</type></term>

          <term>k5 service = <replaceable>service</replaceable>
          <type>(G)</type></term>

          <term>k5 realm = <replaceable>realm</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>These are required if the server supports the Kerberos 5
            authentication UAM.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>nt domain = <parameter>DOMAIN</parameter>
          <type>(G)</type></term>

          <term>nt separator = <parameter>SEPARATOR</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Use for eg. winbind authentication, prepends both strings
            before the username from login and then tries to authenticate with
            the result through the available and active UAM authentication
            modules.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>save password = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>yes</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Enables or disables the ability of clients to save passwords
            locally.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>set password = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Enables or disables the ability of clients to change their
            passwords via chooser or the "connect to server" dialog.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>uam list = <replaceable>uam list</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Space or comma separated list of UAMs. (The default is
            "uams_dhx.so uams_dhx2.so").</para>

            <para>The most commonly used UAMs are:</para>

            <variablelist>
              <varlistentry>
                <term>uams_guest.so</term>

                <listitem>
                  <para>allows guest logins</para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term>uams_clrtxt.so</term>

                <listitem>
                  <para>(uams_pam.so or uams_passwd.so) Allow logins with
                  passwords transmitted in the clear. (legacy)</para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term>uams_randum.so</term>

                <listitem>
                  <para>allows Random Number and Two-Way Random Number
                  Exchange for authentication (requires a separate file
                  containing the passwords, either @pkgconfdir@/afppasswd file or
                  the one specified via "<option>passwd file</option>". See
                  <citerefentry>
                      <refentrytitle>afppasswd</refentrytitle>

                      <manvolnum>1</manvolnum>
                    </citerefentry> for details. (legacy)</para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term>uams_dhx.so</term>

                <listitem>
                  <para>(uams_dhx_pam.so or uams_dhx_passwd.so) Allow
                  Diffie-Hellman eXchange (DHX) for authentication.</para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term>uams_dhx2.so</term>

                <listitem>
                  <para>(uams_dhx2_pam.so or uams_dhx2_passwd.so) Allow
                  Diffie-Hellman eXchange 2 (DHX2) for authentication.</para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term>uam_gss.so</term>

                <listitem>
                  <para>Allow Kerberos V for authentication (optional)</para>
                </listitem>
              </varlistentry>
            </variablelist>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>uam path = <replaceable>path</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Sets the default path for UAMs for this server (default is
            @libdir@/netatalk).</para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Charset Options</title>

      <para>With OS X Apple introduced the AFP3 protocol. One of the big
      changes was, that AFP3 uses Unicode names encoded as Decomposed UTF-8
      (UTF8-MAC). Previous AFP/OS versions used charsets like MacRoman,
      MacCentralEurope, etc.</para>

      <para>To be able to serve AFP3 and older clients at the same time,
      <command>afpd</command> needs to be able to convert between UTF-8 and
      Mac charsets. Even OS X clients partly still rely on the mac charset. As
      there's no way, <command>afpd</command> can detect the codepage a pre
      AFP3 client uses, you have to specify it using the <option>mac
      charset</option> option. The default is MacRoman, which should be fine
      for most western users.</para>

      <para>As <command>afpd</command> needs to interact with UNIX operating
      system as well, it need's to be able to convert from UTF8-MAC / Mac
      charset to the UNIX charset. By default <command>afpd</command> uses
      <emphasis>UTF8</emphasis>. You can set the UNIX charset using the
      <option>unix charset</option> option. If you're using extended
      characters in the configuration files for <command>afpd</command>, make
      sure your terminal matches the <option>unix charset</option>.</para>

      <variablelist>
        <varlistentry>
          <term>mac charset = <parameter>CHARSET</parameter>
          <type>(G)/(V)</type></term>

          <listitem>
            <para>Specifies the Mac clients charset, e.g.
            <emphasis>MAC_ROMAN</emphasis>. This is used to convert strings
            and filenames to the clients codepage for OS9 and Classic, i.e.
            for authentication and AFP messages (SIGUSR2 messaging). This will
            also be the default for the volumes <option>mac charset</option>.
            Defaults to <emphasis>MAC_ROMAN</emphasis>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>unix charset = <parameter>CHARSET</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Specifies the servers unix charset, e.g.
            <emphasis>ISO-8859-15</emphasis> or <emphasis>EUC-JP</emphasis>.
            This is used to convert strings to/from the systems locale, e.g.
            for authentication, server messages and volume names. If
            <emphasis>LOCALE</emphasis> is set, the systems locale is used.
            Defaults to <emphasis>UTF8</emphasis>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>vol charset = <parameter>CHARSET</parameter>
          <type>(G)/(V)</type></term>

          <listitem>
            <para>Specifies the encoding of the volumes filesystem. By
            default, it is the same as <option>unix charset</option>.</para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Password Options</title>

      <variablelist>
        <varlistentry>
          <term>passwd file = <parameter>path</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Sets the path to the Randnum UAM passwd file for this server
            (default is @pkgconfdir@/afppasswd).</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>passwd minlen = <parameter>number</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Sets the minimum password length, if supported by the
            UAM</para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Network Options</title>

      <variablelist>
        <varlistentry>
          <term>advertise ssh = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Allows old Mac OS X clients (10.3.3-10.4) to automagically
            establish a tunneled AFP connection through SSH. If this option is
            set, the server's answers to client's FPGetSrvrInfo requests
            contain an additional entry. It depends on both client's settings
            and a correctly configured and running <citerefentry>
                <refentrytitle>sshd</refentrytitle>

                <manvolnum>8</manvolnum>
              </citerefentry> on the server to let things work.</para>

            <note>
              <para>Setting this option is not recommended since globally
              encrypting AFP connections via SSH will increase the server's
              load significantly. On the other hand, Apple's client side
              implementation of this feature in MacOS X versions prior to
              10.3.4 contained a security flaw.</para>
            </note>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>afp interfaces = <replaceable>name [name ...]</replaceable>
            <type>(G)</type></term>
          <listitem>
            <para>Specifies the network interfaces that the server should
            listens on. The default is advertise the first IP address of the
            system, but to listen for any incoming request.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>afp listen = <replaceable>ip address[:port] [ip address[:port]
          ...]</replaceable> <type>(G)</type></term>

          <listitem>
            <para>Specifies the IP address that the server should advertise
            <emphasis role="bold">and</emphasis> listens to. The default is
            advertise the first IP address of the system, but to listen for
            any incoming request. The network address may be specified either
            in dotted-decimal format for IPv4 or in hexadecimal format for
            IPv6.</para>
            <para>IPv6 address + port combination must use URL the format
            using square brackets [IPv6]:port</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>afp port = <replaceable>port number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Allows a different TCP port to be used for AFP. The default
            is 548. Also sets the default port applied when none specified in
            an <option>afp listen</option> option.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>cnid listen = <replaceable>ip address[:port] [ip
          address[:port] ...]</replaceable> <type>(G)</type></term>

          <listitem>
            <para>Specifies the IP address that the CNID server should listen
            on. The default is <emphasis
            role="bold">localhost:4700</emphasis>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>disconnect time = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Keep disconnected AFP sessions for
            <parameter>number</parameter> hours before dropping them. Default
            is 24 hours.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>dsireadbuf = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Scale factor that determines the size of the DSI/TCP
            readahead buffer, default is 12. This is multiplies with the DSI
            server quantum (default ~300k) to give the size of the buffer.
            Increasing this value might increase throughput in fast local
            networks for volume to volume copies. <emphasis>Note</emphasis>:
            This buffer is allocated per afpd child process, so specifying
            large values will eat up large amount of memory (buffer size *
            number of clients).</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>fqdn = <replaceable>name:port</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Specifies a fully-qualified domain name, with an optional
            port. This is discarded if the server cannot resolve it. This
            option is not honored by AppleShare clients &lt;= 3.8.3. This
            option is disabled by default. Use with caution as this will
            involve a second name resolution step on the client side. Also
            note that afpd will advertise this name:port combination but not
            automatically listen to it.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>hostname = <replaceable>name</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Use this instead of the result from calling hostname for
            determining which IP address to advertise, therefore the hostname
            is resolved to an IP which is the advertised. This is NOT used for
            listening and it is also overwritten by <option>afp
            listen</option>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>max connections = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Sets the maximum number of clients that can simultaneously
            connect to the server (default is 200).</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>server quantum = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>This specifies the DSI server quantum. The default value is
            0x100000 (1 MiB). The maximum value is 0xFFFFFFFFF, the minimum is
            32000. If you specify a value that is out of range, the default
            value will be set. Do not change this value unless you're
            absolutely sure, what you're doing</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>sleep time = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Keep sleeping AFP sessions for <parameter>number</parameter>
            hours before disconnecting clients in sleep mode. Default is 10
            hours.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>tcprcvbuf = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Try to set TCP receive buffer using setsockpt(). Often OSes
            impose restrictions on the applications ability to set this
            value.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>tcpsndbuf = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Try to set TCP send buffer using setsockpt(). Often OSes
            impose restrictions on the applications ability to set this
            value.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>recvfile = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Whether to use splice() on Linux for receiving data.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>splice size = <replaceable>number</replaceable> (default:
          <emphasis>64k</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Maximum number of bytes spliced.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>use sendfile = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>yes</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Whether to use sendfile<indexterm>
                <primary>sendfile</primary>
              </indexterm> syscall for sending file data to clients.</para>
          </listitem>
        </varlistentry>


        <varlistentry>
          <term>zeroconf = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>yes</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Whether to use automatic Zeroconf<indexterm>
                <primary>Zeroconf</primary>

                <secondary>Bonjour</secondary>
              </indexterm> service registration if Avahi or mDNSResponder were
            compiled in.</para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Miscellaneous Options</title>

      <variablelist>
        <varlistentry>
          <term>admin group = <replaceable>group</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Allows users of a certain group to be seen as the superuser
            when they log in. This option is disabled by default.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>afp read locks = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Whether to apply locks to the byte region read in FPRead
            calls. The AFP spec mandates this, but it's not really in line
            with UNIX semantics and is a performance hug.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>afpstats = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Whether to provide AFP runtime statistics (connected
            users, open volumes) via dbus.</para>            
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>basedir regex = <replaceable>regex</replaceable>
          <type>(H)</type></term>

          <listitem>
            <para>Regular expression which matches the parent directory of the
            user homes. If <option>basedir regex</option> contains symlink,
            you must set the canonicalized absolute path. In the simple case
            this is just a path ie <option>basedir regex =
            /home</option></para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>close vol = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Whether to close volumes possibly opened by clients when
            they're removed from the configuration and the configuration is
            reloaded.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>cnid server = <replaceable>ipaddress[:port]</replaceable>
          <type>(G)/(V)</type></term>

          <listitem>
            <para>Specifies the IP address and port of a cnid_metad server,
            required for CNID dbd backend. Defaults to localhost:4700. The
            network address may be specified either in dotted-decimal format
            for IPv4 or in hexadecimal format for IPv6.-</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>dircachesize = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Maximum possible entries in the directory cache. The cache
            stores directories and files. It is used to cache the full path to
            directories and CNIDs which considerably speeds up directory
            enumeration.</para>

            <para>Default size is 8192, maximum size is 131072. Given value is
            rounded up to nearest power of 2. Each entry takes about 100
            bytes, which is not much, but remember that every afpd child
            process for every connected user has its cache.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>extmap file = <parameter>path</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Sets the path to the file which defines file extension
            type/creator mappings. (default is @pkgconfdir@/extmap.conf).</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>guest account = <replaceable>name</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Specifies the user that guests should use (default is
            "nobody"). The name should be quoted.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>home name = <replaceable>name</replaceable>
          <type>(H)</type></term>

          <listitem>
            <para>AFP user home volume name. The default is <emphasis>user's
            home</emphasis>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>login message = <replaceable>message</replaceable>
          <type>(G)/(V)</type></term>

          <listitem>
            <para>Sets a message to be displayed when clients logon to the
            server. The message should be in <option>unix charset</option> and
            should be quoted. Extended characters are allowed.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ignored attributes = <replaceable>all | nowrite | nodelete | norename</replaceable>
          <type>(G)/(V)</type></term>

          <listitem>
            <para>Speficy a set of file and directory attributes that shall
            be ignored by the server, <option>all</option> includes all
            the other options.</para>
            <para>In OS X when the Finder sets a lock on a file/directory or you
            set the BSD uchg flag in the Terminal, all three attributes are
            used. Thus in order to ignore the Finder lock/BSD uchg flag, add
            set <emphasis>ignored attributes = all</emphasis>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>mimic model = <replaceable>model</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Specifies the icon model that appears on clients. Defaults
            to off. Note that afpd must support Zeroconf.
            Examples: RackMac (same as Xserve), PowerBook, PowerMac,
            Macmini, iMac, MacBook, MacBookPro, MacBookAir, MacPro,
            AppleTV1,1, AirPort.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>signature = &lt;text&gt; <type>(G)</type></term>

          <listitem>
            <para>Specify a server signature. The maximum length is 16
            characters. This option is useful for clustered environments, to
            provide fault isolation etc. By default, afpd generate signature
            and saving it to
            <filename>@localstatedir@/netatalk/afp_signature.conf</filename>
            automatically (based on random number). See also
            asip-status.pl(1).</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>solaris share reservations =
          <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>yes</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Use share reservations on Solaris. Solaris CIFS server uses
            this too, so this makes a lock coherent multi protocol
            server.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>spotlight =
          <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(G)/(V)</type></term>

          <listitem>
            <para>Whether to enable Spotlight searches. Note: once the global
            option is enabled, any volume that is not enabled won't be
            searchable at all.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>veto message = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Send optional AFP messages for vetoed files. Then whenever a
            client tries to access any file or directory with a vetoed name,
            it will be sent an AFP message indicating the name and the
            directory.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>vol dbpath = <replaceable>path</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Sets the database information to be stored in path. You have
            to specify a writable location, even if the volume is read only.
            The default is
            <filename>@localstatedir@/netatalk/CNID/</filename>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>vol dbnest = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>Setting this option to true brings back Netatalk 2
            behaviour of storing the CNID database in a folder called
            .AppleDB inside the volume root of each share.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>volnamelen = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Max length of UTF8-MAC volume name for Mac OS X. Note that
            Hangul is especially sensitive to this.</para>

            <para><programlisting> 73: limit of Mac OS X 10.1 80: limit of Mac
            OS X 10.4/10.5 (default) 255: limit of recent Mac OS
            X</programlisting> Mac OS 9 and earlier are not influenced by
            this, because Maccharset volume name is always limited to 27
            bytes.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>vol preset = <replaceable>name</replaceable>
          <type>(G)/(V)</type></term>

          <listitem>
            <para>Use section <option>name</option> as option preset for all
            volumes (when set in the [Global] section) or for one volume (when
            set in that volume's section).</para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Logging Options</title>

      <variablelist>
        <varlistentry>
          <term>log file = <replaceable>logfile</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>If not specified Netatalk logs to syslogs daemon facility.
            Otherwise it logs to <option>logfile</option>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>log level = <replaceable>type:level [type:level
          ...]</replaceable> <type>(G)</type></term>

          <term>log level = <replaceable>type:level,[type:level,
          ...]</replaceable> <type>(G)</type></term>

          <listitem>
            <para>Specify that any message of a loglevel up to the given
            <option>log level</option> should be logged.</para>

            <para>By default afpd logs to syslog with a default logging setup
            equivalent to <option>default:note</option></para>

            <para>logtypes: default, afpdaemon, logger, uamsdaemon</para>

            <para>loglevels: severe, error, warn, note, info, debug, debug6,
            debug7, debug8, debug9, maxdebug</para>

            <note>
              <para>Both logtype and loglevels are case insensitive.</para>
            </note>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2 id="fceconf">
      <title>Filesystem Change Events (FCE<indexterm>
          <primary>FCE</primary>
        </indexterm>)</title>

      <para>Netatalk includes a nifty filesystem change event mechanism where
      afpd processes notify interested listeners about certain filesystem
      event by UDP network datagrams.</para>

      <variablelist>
        <varlistentry>
          <term>fce listener = <replaceable>host[:port]</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Enables sending FCE events to the specified
            <parameter>host</parameter>, default <parameter>port</parameter>
            is 12250 if not specified. Specifying multiple listeners is done
            by having this option once for each of them.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>fce events =
          <replaceable>fmod,fdel,ddel,fcre,dcre,tmsz</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Specifies which FCE events are active, default is
            <parameter>fmod,fdel,ddel,fcre,dcre</parameter>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>fce coalesce = <replaceable>all|delete|create</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Coalesce FCE events.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>fce holdfmod = <replaceable>seconds</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>This determines the time delay in seconds which is always
            waited if another file modification for the same file is done by a
            client before sending an FCE file modification event (fmod). For
            example saving a file in Photoshop would generate multiple events
            by itself because the application is opening, modifying and
            closing a file multiple times for every "save". Default: 60
            seconds.</para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Debug Parameters</title>

      <para>These options are useful for debugging only.</para>

      <variablelist>
        <varlistentry>
          <term>tickleval = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Sets the tickle timeout interval (in seconds). Defaults to
            30.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>timeout = <replaceable>number</replaceable>
          <type>(G)</type></term>

          <listitem>
            <para>Specify the number of tickles to send before timing out a
            connection. The default is 4, therefore a connection will timeout
            after 2 minutes.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>client polling = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(G)</type></term>

          <listitem>
            <para>With this option enabled, afpd won't advertise that it is
            capable of server notifications, so that connected clients poll
            the server every 10 seconds to detect changes in opened server
            windows. <emphasis>Note</emphasis>: Depending on the number of
            simultaneously connected clients and the network's speed, this can
            lead to a significant higher load on your network!</para>

            <para>Do not use this option any longer as present Netatalk
            correctly supports server notifications, allowing connected
            clients to update folder listings in case another client changed
            the contents.</para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2 id="acl_options">
      <title>Options for ACL handling</title>

      <para>By default, the effective permission of the authenticated user are
      only mapped to the mentioned UARights permission structure, not the UNIX
      mode. You can adjust this behaviour with the configuration option
      <option>mac acls</option>:</para>

      <variablelist id="map_acls">
        <varlistentry>
          <term>map acls = <parameter>none|rights|mode</parameter>
          <type>(G)</type></term>

          <listitem>
            <para><variablelist>
                <varlistentry>
                  <term>none</term>

                  <listitem>
                    <para>no mapping of ACLs </para>
                  </listitem>
                </varlistentry>

                <varlistentry>
                  <term>rights</term>

                  <listitem>
                    <para>effective permissions are mapped to UARights
                    structure. This is the default.</para>
                  </listitem>
                </varlistentry>

                <varlistentry>
                  <term>mode</term>

                  <listitem>
                    <para>ACLs are additionally mapped to the UNIX mode of the
                    filesystem object.</para>
                  </listitem>
                </varlistentry>
              </variablelist></para>
          </listitem>
        </varlistentry>
      </variablelist>

      <para>If you want to be able to display ACLs on the client, you must
      setup both client and server as part on a authentication domain
      (directory service, eg LDAP, Open Directory, Active Directory). The
      reason is, in OS X ACLs are bound to UUIDs, not just uid's or gid's.
      Therefor Netatalk must be able to map every filesystem uid and gid to a
      UUID so that it can return the server side ACLs which are bound to UNIX
      uid and gid mapped to OS X UUIDs.</para>

      <para>Netatalk can query a directory server using LDAP queries. Either
      the directory server already provides an UUID attribute for user and
      groups (Active Directory, Open Directory) or you reuse an unused
      attribute (or add a new one) to you directory server (eg
      OpenLDAP).</para>

      <para>The following LDAP options must be configured for Netatalk:</para>

      <variablelist>
        <varlistentry>
          <term>ldap auth method = <parameter>none|simple|sasl</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Authentication method: <option>none | simple |
            sasl</option></para>

            <para><variablelist>
                <varlistentry>
                  <term>none</term>

                  <listitem>
                    <para>anonymous LDAP bind</para>
                  </listitem>
                </varlistentry>

                <varlistentry>
                  <term>simple</term>

                  <listitem>
                    <para>simple LDAP bind</para>
                  </listitem>
                </varlistentry>

                <varlistentry>
                  <term>sasl</term>

                  <listitem>
                    <para>SASL. Not yet supported !</para>
                  </listitem>
                </varlistentry>
              </variablelist></para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap auth dn = <parameter>dn</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Distinguished Name of the user for simple bind.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap auth pw = <parameter>password</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Distinguished Name of the user for simple bind.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap server = <parameter>host</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Name or IP address of your LDAP Server. This is only needed
            for explicit ACL support in order to be able to query LDAP for
            UUIDs.</para>

            <para>You can use <citerefentry>
                <refentrytitle>afpldaptest</refentrytitle>

                <manvolnum>1</manvolnum>
              </citerefentry> to syntactically check your config.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap userbase = <parameter>base dn</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>DN of the user container in LDAP.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap userscope = <parameter>scope</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Search scope for user search: <option>base | one |
            sub</option></para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap groupbase = <parameter>base dn</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>DN of the group container in LDAP.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap groupscope = <parameter>scope</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Search scope for user search: <option>base | one |
            sub</option></para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap uuid attr = <parameter>dn</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Name of the LDAP attribute with the UUIDs.</para>

            <para>Note: this is used both for users and groups.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap name attr = <parameter>dn</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Name of the LDAP attribute with the users short name.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap group attr = <parameter>dn</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Name of the LDAP attribute with the groups short
            name.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap uuid string = <parameter>STRING</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Format of the uuid string in the directory. A series of x
            and -, where every x denotes a value 0-9a-f and every - is a
            separator.</para>

            <para>Default: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap uuid encoding = <parameter>string | ms-guid (default:
          string)</parameter> <type>(G)</type></term>

          <listitem>
            <para>Format of the UUID of the LDAP attribute, allows usage of
            the binary objectGUID fields from Active Directory. If left
            unspecified, string is the default, which passes through the ASCII
            UUID returned by most other LDAP stores. If set to ms-guid, the
            internal UUID representation is converted to and from the binary
            format used in the objectGUID attribute found on objects in Active
            Directory when interacting with the server.</para>
            <para>See also the options <option>ldap user filter</option> and
            <option>ldap group filter</option>.</para>
            <para><variablelist>
                <varlistentry>
                  <term>string</term>

                  <listitem>
                    <para>UUID is a string, use with eg OpenDirectory.</para>
                  </listitem>
                </varlistentry>

                <varlistentry>
                  <term>ms-guid</term>

                  <listitem>
                    <para>Binary objectGUID from Active Directory</para>
                  </listitem>
                </varlistentry>
              </variablelist></para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap user filter = <parameter>STRING (default: unused)</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Optional LDAP filter that matches user objects. This is necessary for Active Directory
            environments where users and groups are stored in the same directory subtree.</para>
            <para>Recommended setting for Active Directory: <parameter>objectClass=user</parameter>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ldap group filter = <parameter>STRING (default: unused)</parameter>
          <type>(G)</type></term>

          <listitem>
            <para>Optional LDAP filter that matches group objects. This is necessary for Active Directory
            environments where users and groups are stored in the same directory subtree.</para>
            <para>Recommended setting for Active Directory: <parameter>objectClass=group</parameter>.</para>
          </listitem>
        </varlistentry>

      </variablelist>
    </refsect2>
  </refsect1>

  <refsect1>
    <title>EXPLANATION OF VOLUME PARAMETERS</title>

    <refsect2>
      <title>Parameters</title>

      <para>The section name defines the volume name.
      No two volumes may have the same
      name. The volume name cannot contain the <keycode>':'</keycode>
      character. The volume name is mangled if it is very long. Mac charset
      volume name is limited to 27 characters. UTF8-MAC volume name is limited
      to volnamelen parameter.</para>

      <variablelist>
        <varlistentry>
          <term>path = <replaceable>PATH</replaceable> <type>(V)</type></term>

          <listitem>
            <para>The path name must be a fully qualified path name.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>appledouble = <replaceable>ea|v2</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>Specify the format of the metadata files, which are used for
            saving Mac resource fork as well. Earlier versions used
            AppleDouble v2, the new default format is <emphasis
            role="bold">ea</emphasis>.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>vol size limit = <replaceable>size in MiB</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>Useful for Time Machine: limits the reported volume size,
            thus preventing Time Machine from using the whole real disk space
            for backup. Example: "vol size limit = 1000" would limit the
            reported disk space to 1 GB. <emphasis role="bold">IMPORTANT:
            </emphasis> This is an approximated calculation taking into
            account the contents of Time Machine sparsebundle images. Therefor
            you MUST NOT use this volume to store other content when using
            this option, because it would NOT be accounted. The calculation
            works by reading the band size from the Info.plist XML file of the
            sparsebundle, reading the bands/ directory counting the number of
            band files, and then multiplying one with the other.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>valid users = <replaceable>user @group</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>The allow option allows the users and groups that access a
            share to be specified. Users and groups are specified, delimited
            by spaces or commas. Groups are designated by a @ prefix. Names
            may be quoted in order to allow for spaces in names. Example:
            <programlisting>valid users = user "user 2" @group “@group 2"</programlisting></para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>invalid users = <replaceable>users/groups</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>The deny option specifies users and groups who are not
            allowed access to the share. It follows the same format as the
            "valid users" option.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>hosts allow = <replaceable>IP host address/IP netmask bits [
          ... ]</replaceable> <type>(V)</type></term>

          <listitem>
            <para>Only listed hosts and networks are allowed, all others are
            rejected. The network address may be specified either in
            dotted-decimal format for IPv4 or in hexadecimal format for
            IPv6.</para>

            <para>Example: hosts allow = 10.1.0.0/16 10.2.1.100
            2001:0db8:1234::/48</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>hosts deny = <replaceable>IP host address/IP netmask bits [
          ... ]</replaceable> <type>(V)</type></term>

          <listitem>
            <para>Listed hosts and nets are rejected, all others are
            allowed.</para>

            <para>Example: hosts deny = 192.168.100/24 10.1.1.1
            2001:db8::1428:57ab</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>cnid scheme = <replaceable>backend</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>set the CNID backend to be used for the volume, default is
            [@DEFAULT_CNID_SCHEME@] available schemes:
            [@compiled_backends@]</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>ea = <replaceable>none|auto|sys|ad</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>Specify how Extended Attributes<indexterm>
                <primary>Extended Attributes</primary>
              </indexterm> are stored. <option>auto</option> is the
            default.</para>

            <variablelist>
              <varlistentry>
                <term>auto</term>

                <listitem>
                  <para>Try <option>sys</option> (by setting an EA on the
                  shared directory itself), fallback to <option>ad</option>.
                  Requires writable volume for performing test. "<option>read
                  only = yes</option>" overwrites <option>auto</option> with
                  <option>none</option>. Use explicit "<option>ea =
                  sys|ad</option>" for read-only volumes where
                  appropriate.</para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term>sys</term>

                <listitem>
                  <para>Use filesystem Extended Attributes.</para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term>ad</term>

                <listitem>
                  <para>Use files in <emphasis>.AppleDouble</emphasis>
                  directories.</para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term>none</term>

                <listitem>
                  <para>No Extended Attributes support.</para>
                </listitem>
              </varlistentry>
            </variablelist>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>mac charset = <replaceable>CHARSET</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>specifies the Mac client charset for this Volume, e.g.
            <emphasis>MAC_ROMAN</emphasis>, <emphasis>MAC_CYRILLIC</emphasis>.
            If not specified the global setting is applied. This setting is
            only required if you need volumes, where the Mac charset differs
            from the one globally set in the [Global] section.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>casefold = <option>option</option> <type>(V)</type></term>

          <listitem>
            <para>The casefold option handles, if the case of filenames should
            be changed. The available options are:</para>

            <para><option>tolower</option> - Lowercases names in both
            directions.</para>

            <para><option>toupper</option> - Uppercases names in both
            directions.</para>

            <para><option>xlatelower</option> - Client sees lowercase, server
            sees uppercase.</para>

            <para><option>xlateupper</option> - Client sees uppercase, server
            sees lowercase.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>password = <replaceable>password</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>This option allows you to set a volume password, which can
            be a maximum of 8 characters long (using ASCII strongly
            recommended at the time of this writing).</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>file perm = <replaceable>mode</replaceable>
          <type>(V)</type></term>

          <term>directory perm = <replaceable>mode</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>Add(or) with the client requested permissions: <option>file
            perm</option> is for files only, <option>directory perm</option>
            is for directories only. Don't use with "<option>unix priv =
            no</option>".</para>

            <example>
              <title>Volume for a collaborative workgroup</title>

              <para><programlisting>file perm = 0660 directory perm =
              0770</programlisting></para>
            </example>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>umask = <replaceable>mode</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>set perm mask. Don't use with "<option>unix priv =
            no</option>".</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>preexec = <replaceable>command</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>command to be run when the volume is mounted, ignored for
            user defined volumes</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>postexec = <replaceable>command</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>command to be run when the volume is closed, ignored for
            user defined volumes</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>root preexec = <replaceable>command</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>command to be run as root when the volume is mounted,
            ignored for user defined volumes</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>root postexec = <replaceable>command</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>command to be run as root when the volume is closed, ignored
            for user defined volumes</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>rolist = <option>users/groups</option> <type>(V)</type></term>

          <listitem>
            <para>Allows certain users and groups to have read-only access to
            a share. This follows the allow option format.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>rwlist = <replaceable>users/groups</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>Allows certain users and groups to have read/write access to
            a share. This follows the allow option format.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>veto files = <replaceable>vetoed names</replaceable>
          <type>(V)</type></term>

          <listitem>
            <para>hide files and directories,where the path matches one of the
            '/' delimited vetoed names. The veto string must always be
            terminated with a '/', eg. "veto1/", "veto1/veto2/".</para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Volume options</title>

      <para>Boolean volume options.</para>

      <variablelist>
        <varlistentry>
          <term>acls = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>yes</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>Whether to flag volumes as supporting ACLs. If ACL support
            is compiled in, this is yes by default.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>cnid dev = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>yes</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>Whether to use the device number in the CNID backends. Helps
            when the device number is not constant across a reboot, eg
            cluster, ...</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>convert appledouble = <replaceable>BOOLEAN</replaceable>
          (default: <emphasis>yes</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>Whether automatic conversion from <option>appledouble =
            v2</option> to <option>appledouble = ea</option> is performed when
            accessing filesystems from clients. This is generally useful, but
            costs some performance. It's recommendable to run
            <command>dbd</command> on volumes and do the conversion with that.
            Then this option can be set to no.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>delete veto files = <replaceable>BOOLEAN</replaceable>
          (default: <emphasis>no</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>This option is used when Netatalk is attempting to delete a
            directory that contains one or more vetoed files or directories
            (see the veto files option). If this option is set to no (the
            default) then if a directory contains any non-vetoed files or
            directories then the directory delete will fail. This is usually
            what you want.</para>
            <para>If this option is set to yes, then Netatalk will attempt to
            recursively delete any files and directories within the vetoed
            directory.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>follow symlinks = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>The default setting is false thus symlinks are not followed
            on the server. This is the same behaviour as OS X's AFP server.
            Setting the option to true causes afpd to follow symlinks on the
            server. symlinks may point outside of the AFP volume, currently
            afpd doesn't do any checks for "wide symlinks".</para>
            <note>
              <para>This option will subtly break when the symlinks point
              across filesystem boundaries.</para>
            </note>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>invisible dots = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>make dot files invisible. WARNING: enabling this option will
              lead to unwanted sideeffects were OS X applications when saving
              files to a temporary file starting with a dot first, then renaming
              the temp file to its final name, result in the saved file being
              invisible. The only thing this option is useful for is making
              files that start with a dot invisible on Mac OS 9. It's
              completely useless on Mac OS X, as both in Finder and in Terminal
              files starting with a dot are hidden anyway.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>network ids = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>yes</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>Whether the server support network ids. Setting this to
            <emphasis>no</emphasis> will result in the client not using ACL
            AFP functions.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>preexec close = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>A non-zero return code from preexec close the volume being
            immediately, preventing clients to mount/see the volume in
            question.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>read only = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>Specifies the share as being read only for all users.
            Overwrites <option>ea = auto</option> with <option>ea =
            none</option></para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>root preexec close= <replaceable>BOOLEAN</replaceable>
          (default: <emphasis>no</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>A non-zero return code from root_preexec closes the volume
            immediately, preventing clients to mount/see the volume in
            question.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>search db = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>Use fast CNID database namesearch instead of slow recursive
            filesystem search. Relies on a consistent CNID database, ie Samba
            or local filesystem access lead to inaccurate or wrong results.
            Works only for "dbd" CNID db volumes.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>stat vol = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>yes</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>Whether to stat volume path when enumerating volumes list,
            useful for automounting or volumes created by a preexec
            script.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>time machine = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>no</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>Whether to enable Time Machine support for this
            volume.</para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term>unix priv = <replaceable>BOOLEAN</replaceable> (default:
          <emphasis>yes</emphasis>) <type>(V)</type></term>

          <listitem>
            <para>Whether to use AFP3 UNIX privileges. This should be set for
            OS X clients. See also: <option>file perm</option>,
            <option>directory perm</option> and <option>umask</option>.</para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>
  </refsect1>

  <refsect1>
    <title>CNID backends</title>

    <para>The AFP protocol mostly refers to files and directories by ID and
    not by name. Netatalk needs a way to store these ID's in a persistent way,
    to achieve this several different CNID backends are available. The CNID
    Databases are by default located in the
    <filename>@localstatedir@/netatalk/CNID/(volumename)/.AppleDB/</filename>
    directory.</para>

    <variablelist>
      <varlistentry>
        <term>cdb</term>

        <listitem>
          <para>"Concurrent database", backend is based on Oracle Berkley DB.
          With this backend several <command>afpd</command> daemons access the
          CNID database directly. Berkeley DB locking is used to synchronize
          access, if more than one <command>afpd</command> process is active
          for a volume. The drawback is, that the crash of a single
          <command>afpd</command> process might corrupt the database.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>dbd</term>

        <listitem>
          <para>Access to the CNID database is restricted to the
          <command>cnid_metad</command> daemon process.
          <command>afpd</command> processes communicate with the daemon for
          database reads and updates. If built with Berkeley DB transactions
          the probability for database corruption is practically zero, but
          performance can be slower than with <option>cdb</option></para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term>last</term>

        <listitem>
          <para>This backend is an exception, in terms of ID persistency. ID's
          are only valid for the current session. This is basically what
          <command>afpd</command> did in the 1.5 (and 1.6) versions. This
          backend is still available, as it is useful for e.g. sharing cdroms.
          Starting with Netatalk 3.0, it becomes the <emphasis>read only
          mode</emphasis> automatically.</para>

          <para><emphasis role="bold">Warning</emphasis>: It is
          <emphasis>NOT</emphasis> recommended to use this backend for volumes
          anymore, as <command>afpd</command> now relies heavily on a
          persistent ID database. Aliases will likely not work and filename
          mangling is not supported.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <para>Even though <command>./configure --help</command> might show that
    there are other CNID backends available, be warned those are likely broken
    or mainly used for testing. Don't use them unless you know what you're
    doing, they may be removed without further notice from future
    versions.</para>
  </refsect1>

  <refsect1>
    <title>Charset options</title>

    <para>With OS X Apple introduced the AFP3 protocol. One of the most
    important changes was that AFP3 uses unicode names encoded as UTF-8
    decomposed. Previous AFP/OS versions used codepages, like MacRoman,
    MacCentralEurope, etc.</para>

    <para><command>afpd</command> needs a way to preserve extended Macintosh
    characters, or characters illegal in unix filenames, when saving files on
    a unix filesystem. Earlier versions used the the so called CAP encoding.
    An extended character (&gt;0x7F) would be converted to a :xx sequence,
    e.g. the Apple Logo (MacRoman: 0xF0) was saved as <literal>:f0</literal>.
    Some special characters will be converted as to :xx notation as well.
    '<keycode>/</keycode>' will be encoded to <literal>:2f</literal>, if
    <option>usedots</option> is not specified, a leading dot
    '<keycode>.</keycode>' will be encoded as <literal>:2e</literal>.</para>

    <para>This version now uses UTF-8 as the default encoding for names.
    '<keycode>/</keycode>' will be converted to '<keycode>:</keycode>'.</para>

    <para>The <option>vol charset</option> option will allow you to select
    another volume encoding. E.g. for western users another useful setting
    could be vol charset ISO-8859-15. <command>afpd</command> will accept any
    <citerefentry>
        <refentrytitle><command>iconv</command></refentrytitle>

        <manvolnum>1</manvolnum>
      </citerefentry> provided charset. If a character cannot be converted
    from the <option>mac charset</option> to the selected <option>vol
    charset</option>, afpd will save it as a CAP encoded character. For AFP3
    clients, <command>afpd</command> will convert the UTF-8<indexterm>
        <primary>UTF8</primary>

        <secondary>afpd's vol charset setting</secondary>
      </indexterm><indexterm>
        <primary>UTF8-MAC</primary>

        <secondary>afpd's vol charset setting</secondary>
      </indexterm><indexterm>
        <primary>ISO-8859-15</primary>

        <secondary>afpd's vol charset setting</secondary>
      </indexterm><indexterm>
        <primary>ISO-8859-1</primary>

        <secondary>afpd's vol charset setting</secondary>
      </indexterm> character to <option>mac charset</option> first. If this
    conversion fails, you'll receive a -50 error on the mac.</para>

    <para><emphasis>Note</emphasis>: Whenever you can, please stick with the
    default UTF-8 volume format.</para>
  </refsect1>

  <refsect1>
    <title>SEE ALSO</title>

    <para><citerefentry>
        <refentrytitle>afpd</refentrytitle>

        <manvolnum>8</manvolnum>
      </citerefentry>, <citerefentry>
        <refentrytitle>afppasswd</refentrytitle>

        <manvolnum>5</manvolnum>
      </citerefentry>, <citerefentry>
        <refentrytitle>afp_signature.conf</refentrytitle>

        <manvolnum>5</manvolnum>
      </citerefentry>, <citerefentry>
        <refentrytitle>extmap.conf</refentrytitle>

        <manvolnum>5</manvolnum>
      </citerefentry>, <citerefentry>
        <refentrytitle>cnid_metad</refentrytitle>

        <manvolnum>8</manvolnum>
      </citerefentry></para>
  </refsect1>
</refentry>