man/systemd.automount.xml

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   9   Copyright 2010 Lennart Poettering
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  24
  25 <refentry id="systemd.automount">
  26   <refentryinfo>
  27     <title>systemd.automount</title>
  28     <productname>systemd</productname>
  29
  30     <authorgroup>
  31       <author>
  32         <contrib>Developer</contrib>
  33         <firstname>Lennart</firstname>
  34         <surname>Poettering</surname>
  35         <email>lennart@poettering.net</email>
  36       </author>
  37     </authorgroup>
  38   </refentryinfo>
  39
  40   <refmeta>
  41     <refentrytitle>systemd.automount</refentrytitle>
  42     <manvolnum>5</manvolnum>
  43   </refmeta>
  44
  45   <refnamediv>
  46     <refname>systemd.automount</refname>
  47     <refpurpose>Automount unit configuration</refpurpose>
  48   </refnamediv>
  49
  50   <refsynopsisdiv>
  51     <para><filename><replaceable>automount</replaceable>.automount</filename></para>
  52   </refsynopsisdiv>
  53
  54   <refsect1>
  55     <title>Description</title>
  56
  57     <para>A unit configuration file whose name ends in
  58     <literal>.automount</literal> encodes information about a file
  59     system automount point controlled and supervised by
  60     systemd.</para>
  61
  62     <para>This man page lists the configuration options specific to
  63     this unit type. See
  64     <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  65     for the common options of all unit configuration files. The common
  66     configuration items are configured in the generic [Unit] and
  67     [Install] sections. The automount specific configuration options
  68     are configured in the [Automount] section.</para>
  69
  70     <para>Automount units must be named after the automount
  71     directories they control. Example: the automount point
  72     <filename noindex='true'>/home/lennart</filename> must be
  73     configured in a unit file
  74     <filename>home-lennart.automount</filename>. For details about the
  75     escaping logic used to convert a file system path to a unit name
  76     see
  77     <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
  78
  79     <para>For each automount unit file a matching mount unit file (see
  80     <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  81     for details) must exist which is activated when the automount path
  82     is accessed. Example: if an automount unit
  83     <filename>home-lennart.automount</filename> is active and the user
  84     accesses <filename>/home/lennart</filename> the mount unit
  85     <filename>home-lennart.mount</filename> will be activated.</para>
  86
  87     <para>Automount units may be used to implement on-demand mounting
  88     as well as parallelized mounting of file systems.</para>
  89
  90     <para>If an automount point is beneath another mount point in the
  91     file system hierarchy, a dependency between both units is created
  92     automatically.</para>
  93   </refsect1>
  94
  95   <refsect1>
  96     <title><filename>fstab</filename></title>
  97
  98     <para>Automount units may either be configured via unit files, or
  99     via <filename>/etc/fstab</filename> (see
 100     <citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 101     for details).</para>
 102
 103     <para>For details how systemd parses
 104     <filename>/etc/fstab</filename> see
 105     <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
 106
 107     <para>If an automount point is configured in both
 108     <filename>/etc/fstab</filename> and a unit file, the configuration
 109     in the latter takes precedence.</para>
 110   </refsect1>
 111
 112   <refsect1>
 113     <title>Options</title>
 114
 115     <para>Automount files must include an [Automount] section, which
 116     carries information about the file system automount points it
 117     supervises. The options specific to the [Automount] section of
 118     automount units are the following:</para>
 119
 120     <variablelist class='unit-directives'>
 121
 122       <varlistentry>
 123         <term><varname>Where=</varname></term>
 124         <listitem><para>Takes an absolute path of a directory of the
 125         automount point. If the automount point does not exist at time
 126         that the automount point is installed, it is created. This
 127         string must be reflected in the unit filename. (See above.)
 128         This option is mandatory.</para></listitem>
 129       </varlistentry>
 130
 131       <varlistentry>
 132         <term><varname>DirectoryMode=</varname></term>
 133         <listitem><para>Directories of automount points (and any
 134         parent directories) are automatically created if needed. This
 135         option specifies the file system access mode used when
 136         creating these directories. Takes an access mode in octal
 137         notation. Defaults to 0755.</para></listitem>
 138       </varlistentry>
 139     </variablelist>
 140   </refsect1>
 141
 142   <refsect1>
 143       <title>See Also</title>
 144       <para>
 145         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 146         <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 147         <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 148         <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 149         <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 150         <citerefentry><refentrytitle>automount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 151         <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
 152       </para>
 153   </refsect1>
 154
 155 </refentry>