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<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="systemd.automount">
<refentryinfo>
<title>systemd.automount</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Lennart</firstname>
<surname>Poettering</surname>
<email>lennart@poettering.net</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>systemd.automount</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd.automount</refname>
<refpurpose>Automount unit configuration</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename><replaceable>automount</replaceable>.automount</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>A unit configuration file whose name ends in
<literal>.automount</literal> encodes information about a file
system automount point controlled and supervised by
systemd.</para>
<para>This man page lists the configuration options specific to
this unit type. See
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for the common options of all unit configuration files. The common
configuration items are configured in the generic [Unit] and
[Install] sections. The automount specific configuration options
are configured in the [Automount] section.</para>
<para>Automount units must be named after the automount
directories they control. Example: the automount point
<filename noindex='true'>/home/lennart</filename> must be
configured in a unit file
<filename>home-lennart.automount</filename>. For details about the
escaping logic used to convert a file system path to a unit name
see
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
<para>For each automount unit file a matching mount unit file (see
<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for details) must exist which is activated when the automount path
is accessed. Example: if an automount unit
<filename>home-lennart.automount</filename> is active and the user
accesses <filename>/home/lennart</filename> the mount unit
<filename>home-lennart.mount</filename> will be activated.</para>
<para>Automount units may be used to implement on-demand mounting
as well as parallelized mounting of file systems.</para>
<para>If an automount point is beneath another mount point in the
file system hierarchy, a dependency between both units is created
automatically.</para>
</refsect1>
<refsect1>
<title><filename>fstab</filename></title>
<para>Automount units may either be configured via unit files, or
via <filename>/etc/fstab</filename> (see
<citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for details).</para>
<para>For details how systemd parses
<filename>/etc/fstab</filename> see
<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
<para>If an automount point is configured in both
<filename>/etc/fstab</filename> and a unit file, the configuration
in the latter takes precedence.</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>Automount files must include an [Automount] section, which
carries information about the file system automount points it
supervises. The options specific to the [Automount] section of
automount units are the following:</para>
<variablelist class='unit-directives'>
<varlistentry>
<term><varname>Where=</varname></term>
<listitem><para>Takes an absolute path of a directory of the
automount point. If the automount point does not exist at time
that the automount point is installed, it is created. This
string must be reflected in the unit filename. (See above.)
This option is mandatory.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>DirectoryMode=</varname></term>
<listitem><para>Directories of automount points (and any
parent directories) are automatically created if needed. This
option specifies the file system access mode used when
creating these directories. Takes an access mode in octal
notation. Defaults to 0755.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>TimeoutIdleSec=</varname></term>
<listitem><para>Configures an idleness timeout. Once the mount has been
idle for the specified time, systemd will attempt to unmount. Takes a
unit-less value in seconds, or a time span value such as "5min 20s".
Pass 0 to disable the timeout logic. The timeout is disabled by
default.</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='die-net'><refentrytitle>automount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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