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>systemd automount configuration files</refpurpose>
  48         </refnamediv>
  49
  50         <refsynopsisdiv>
  51                 <para><filename>systemd.automount</filename></para>
  52         </refsynopsisdiv>
  53
  54         <refsect1>
  55                 <title>Description</title>
  56
  57                 <para>A unit configuration file whose name ends in
  58                 <filename>.automount</filename> encodes information
  59                 about a file system automount point controlled and
  60                 supervised by systemd.</para>
  61
  62                 <para>This man page lists the configuration options
  63                 specific to this unit type. See
  64                 <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  65                 for the common options of all unit configuration
  66                 files. The common configuration items are configured
  67                 in the generic [Unit] and [Install] sections. The
  68                 automount specific configuration options are configured
  69                 in the [Automount] section.</para>
  70
  71                 <para>Automount units must be named after the file
  72                 paths they reflect. Example: the automount point
  73                 <filename>/home/lennart</filename> must be configured
  74                 in a unit file
  75                 <filename>home-lennart.automount</filename>. For
  76                 details about the escaping logic used to convert a
  77                 file system path to a unit name see
  78                 <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
  79
  80                 <para>For each automount unit file a matching mount
  81                 unit file (see
  82                 <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  83                 for details) must exist which is activated when the
  84                 automount path is accessed. Example: if an automount
  85                 unit <filename>home-lennart.automount</filename> is
  86                 active and the user accesses
  87                 <filename>/home/lennart</filename> the mount unit
  88                 <filename>home-lennart.mount</filename> will be
  89                 activated.</para>
  90
  91                 <para>Automount units may be used to implement
  92                 on-demand mounting as well as parallelized mounting of
  93                 file systems.</para>
  94
  95         </refsect1>
  96
  97         <refsect1>
  98                 <title><filename>fstab</filename></title>
  99
 100                 <para>Automount units may either be configured via unit
 101                 files, or via <filename>/etc/fstab</filename> (see
 102                 <citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 103                 for details).</para>
 104
 105                 <para>For details how systemd parses
 106                 <filename>/etc/fstab</filename> see
 107                 <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
 108
 109                 <para>If an automount point is configured in both
 110                 <filename>/etc/fstab</filename> and a unit file the
 111                 configuration in the latter takes precedence.</para>
 112         </refsect1>
 113
 114         <refsect1>
 115                 <title>Options</title>
 116
 117                 <para>Automount files must include an [Automount]
 118                 section, which carries information about the file
 119                 system automount points it supervises. The options
 120                 specific to the [Automount] section of automount units
 121                 are the following:</para>
 122
 123                 <variablelist>
 124
 125                         <varlistentry>
 126                                 <term><varname>Where=</varname></term>
 127                                 <listitem><para>Takes an absolute path
 128                                 of a directory of the automount
 129                                 point. If the automount point is not
 130                                 existing at time of the automount
 131                                 point is installed it is created. This
 132                                 string must be reflected in the unit
 133                                 file name. (See above.) This option is
 134                                 mandatory.</para></listitem>
 135                         </varlistentry>
 136
 137                         <varlistentry>
 138                                 <term><varname>DirectoryMode=</varname></term>
 139                                 <listitem><para>Directories of automount
 140                                 points (and any parent directories)
 141                                 are automatically created if
 142                                 needed. This option specifies the file
 143                                 system access mode used when creating
 144                                 these directories. Defaults to
 145                                 0755.</para></listitem>
 146                         </varlistentry>
 147                 </variablelist>
 148         </refsect1>
 149
 150         <refsect1>
 151                   <title>See Also</title>
 152                   <para>
 153                           <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 154                           <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 155                           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 156                           <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 157                           <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 158                           <citerefentry><refentrytitle>automount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 159                   </para>
 160         </refsect1>
 161
 162 </refentry>