man/tmpfiles.d.xml

   1 <?xml version="1.0"?>
   2 <!--*-nxml-*-->
   3 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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   7   Copyright 2010 Brandon Philips
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  22 <refentry id="tmpfiles.d">
  23
  24         <refentryinfo>
  25                 <title>tmpfiles.d</title>
  26                 <productname>systemd</productname>
  27
  28                 <authorgroup>
  29                         <author>
  30                                 <contrib>Documentation</contrib>
  31                                 <firstname>Brandon</firstname>
  32                                 <surname>Philips</surname>
  33                                 <email>brandon@ifup.org</email>
  34                         </author>
  35                 </authorgroup>
  36         </refentryinfo>
  37
  38         <refmeta>
  39                 <refentrytitle>tmpfiles.d</refentrytitle>
  40                 <manvolnum>5</manvolnum>
  41         </refmeta>
  42
  43         <refnamediv>
  44                 <refname>tmpfiles.d</refname>
  45                 <refpurpose>Configuration for creation, deletion and cleaning of temporary and volatile files</refpurpose>
  46         </refnamediv>
  47
  48         <refsynopsisdiv>
  49                 <para><filename>/etc/tmpfiles.d/*.conf</filename></para>
  50         </refsynopsisdiv>
  51
  52         <refsect1>
  53                 <title>Description</title>
  54
  55                 <para><command>systemd</command> uses
  56                 <filename>/etc/tmpfiles.d/</filename> to describe the
  57                 creation, cleaning and removal of temporary files and
  58                 directories which usually reside in
  59                 <filename>/var/run</filename> or
  60                 <filename>/tmp</filename>).  Each configuration file
  61                 is named in the style of
  62                 <filename>/etc/tmpfiles.d/&lt;program&gt;.conf</filename>.</para>
  63         </refsect1>
  64
  65         <refsect1>
  66                 <title>Configuration Format</title>
  67
  68                 <para>The configuration format is one line per path
  69                 containing action, mode, ownership and age
  70                 fields:</para>
  71
  72                 <programlisting>Type Path          Mode UID  GID  Age
  73 d    /var/run/user 0755 root root 10d</programlisting>
  74
  75                 <refsect2>
  76                         <title>Type</title>
  77                         <variablelist>
  78                                 <varlistentry>
  79                                         <term><varname>f</varname></term>
  80                                         <listitem><para>Create a file if it doesn't exist yet</para></listitem>
  81                                 </varlistentry>
  82
  83                                 <varlistentry>
  84                                         <term><varname>F</varname></term>
  85                                         <listitem><para>Create or truncate a file</para></listitem>
  86                                 </varlistentry>
  87
  88                                 <varlistentry>
  89                                         <term><varname>d</varname></term>
  90                                         <listitem><para>Create a directory if it doesn't exist yet</para></listitem>
  91                                 </varlistentry>
  92
  93                                 <varlistentry>
  94                                         <term><varname>D</varname></term>
  95                                         <listitem><para>Create or empty a directory</para></listitem>
  96                                 </varlistentry>
  97
  98                                 <varlistentry>
  99                                         <term><varname>x</varname></term>
 100                                         <listitem><para>Ignore a path</para></listitem>
 101                                 </varlistentry>
 102
 103                                 <varlistentry>
 104                                         <term><varname>r</varname></term>
 105                                         <listitem><para>Remove a path</para></listitem>
 106                                 </varlistentry>
 107
 108                                 <varlistentry>
 109                                         <term><varname>R</varname></term>
 110                                         <listitem><para>Recursively remove a path</para></listitem>
 111                                 </varlistentry>
 112                         </variablelist>
 113                 </refsect2>
 114
 115                 <refsect2>
 116                         <title>Mode</title>
 117
 118                         <para>The file access mode to use for this
 119                         file or directory. If omitted or when set to -
 120                         the default is used: 0755 for directories,
 121                         0644 for files.</para>
 122                 </refsect2>
 123
 124                 <refsect2>
 125                         <title>UID, GID</title>
 126
 127                         <para>The user and group to use for this file
 128                         or directory. This may either be a numeric
 129                         user/group ID or a user or group name. If
 130                         omitted or when set to - the default 0 is
 131                         used.</para>
 132                 </refsect2>
 133
 134                 <refsect2>
 135                         <title>Age</title>
 136                         <para>The date field, when set, is used to
 137                         decide what files to delete when cleaning. If
 138                         a file or directory is older than the current
 139                         time minus the age field it is deleted. The
 140                         field format is a series of integers each
 141                         followed by one of the following
 142                         postfixes for the respective time units:</para>
 143
 144                         <variablelist>
 145                                 <varlistentry>
 146                                 <term><varname>s</varname></term>
 147                                 <term><varname>min</varname></term>
 148                                 <term><varname>h</varname></term>
 149                                 <term><varname>d</varname></term>
 150                                 <term><varname>w</varname></term>
 151                                 <term><varname>ms</varname></term>
 152                                 <term><varname>m</varname></term>
 153                                 <term><varname>us</varname></term></varlistentry>
 154                         </variablelist>
 155
 156                         <para>If multiple integers and units are specified the time values are summed up.</para>
 157
 158                         <para>The age field only applies to lines starting with d, D and x. If omitted or set to - no automatic clean-up is done.</para>
 159
 160                 </refsect2>
 161
 162         </refsect1>
 163
 164         <refsect1>
 165                 <title>Example</title>
 166                 <example>
 167                         <title>/etc/tmpfiles.d/screen.conf example</title>
 168                         <para><command>screen</command> needs two directories created at boot with specific modes and ownership.</para>
 169
 170                         <programlisting>d /var/run/screens 1777 root root 10d
 171 d /var/run/uscreens 0755 root root 10d12h</programlisting>
 172                 </example>
 173         </refsect1>
 174
 175         <refsect1>
 176                 <title>See Also</title>
 177                 <para>
 178                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
 179                 </para>
 180         </refsect1>
 181
 182 </refentry>