man/tmpfiles.d.xml

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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
  46                 cleaning of volatile and temporary files</refpurpose>
  47         </refnamediv>
  48
  49         <refsynopsisdiv>
  50                 <para><filename>/etc/tmpfiles.d/*.conf</filename></para>
  51         </refsynopsisdiv>
  52
  53         <refsect1>
  54                 <title>Description</title>
  55
  56                 <para><command>systemd-tmpfiles</command> uses the
  57                 configuration files in
  58                 <filename>/etc/tmpfiles.d/</filename> to describe the
  59                 creation, cleaning and removal of volatile and
  60                 temporary files and directories which usually reside
  61                 in directories such as <filename>/var/run</filename>
  62                 or <filename>/tmp</filename>. Each configuration file
  63                 is named in the style of
  64                 <filename>/etc/tmpfiles.d/&lt;program&gt;.conf</filename>.</para>
  65         </refsect1>
  66
  67         <refsect1>
  68                 <title>Configuration Format</title>
  69
  70                 <para>The configuration format is one line per path
  71                 containing action, mode, ownership and age
  72                 fields:</para>
  73
  74                 <programlisting>Type Path          Mode UID  GID  Age
  75 d    /var/run/user 0755 root root 10d</programlisting>
  76
  77                 <refsect2>
  78                         <title>Type</title>
  79                         <variablelist>
  80                                 <varlistentry>
  81                                         <term><varname>f</varname></term>
  82                                         <listitem><para>Create a file if it doesn't exist yet</para></listitem>
  83                                 </varlistentry>
  84
  85                                 <varlistentry>
  86                                         <term><varname>F</varname></term>
  87                                         <listitem><para>Create or truncate a file</para></listitem>
  88                                 </varlistentry>
  89
  90                                 <varlistentry>
  91                                         <term><varname>d</varname></term>
  92                                         <listitem><para>Create a directory if it doesn't exist yet</para></listitem>
  93                                 </varlistentry>
  94
  95                                 <varlistentry>
  96                                         <term><varname>D</varname></term>
  97                                         <listitem><para>Create or empty a directory</para></listitem>
  98                                 </varlistentry>
  99
 100                                 <varlistentry>
 101                                         <term><varname>x</varname></term>
 102                                         <listitem><para>Ignore a path
 103                                         during cleaning. Use this type
 104                                         to exclude paths from clean-up
 105                                         as controlled with the Age
 106                                         parameter. Note that lines of
 107                                         this type do not influence the
 108                                         effect of r or R lines. Lines
 109                                         of this type accept
 110                                         shell-style globs in place of
 111                                         of normal path
 112                                         names.</para></listitem>
 113                                 </varlistentry>
 114
 115                                 <varlistentry>
 116                                         <term><varname>r</varname></term>
 117                                         <listitem><para>Remove a file
 118                                         or directory if it
 119                                         exists. This may not be used
 120                                         to remove non-empty
 121                                         directories, use R for
 122                                         that. Lines of this type
 123                                         accept shell-style globs in
 124                                         place of normal path
 125                                         names.</para></listitem>
 126                                 </varlistentry>
 127
 128                                 <varlistentry>
 129                                         <term><varname>R</varname></term>
 130                                         <listitem><para>Recursively
 131                                         remove a path and all its
 132                                         subdirectories (if it is a
 133                                         directory). Lines of this type
 134                                         accept shell-style globs in
 135                                         place of normal path
 136                                         names.</para></listitem>
 137                                 </varlistentry>
 138                         </variablelist>
 139                 </refsect2>
 140
 141                 <refsect2>
 142                         <title>Mode</title>
 143
 144                         <para>The file access mode to use when
 145                         creating this file or directory. If omitted or
 146                         when set to - the default is used: 0755 for
 147                         directories, 0644 for files. This parameter is
 148                         ignored for x, r, R lines.</para>
 149                 </refsect2>
 150
 151                 <refsect2>
 152                         <title>UID, GID</title>
 153
 154                         <para>The user and group to use for this file
 155                         or directory. This may either be a numeric
 156                         user/group ID or a user or group name. If
 157                         omitted or when set to - the default 0 (root)
 158                         is used. . These parameters are ignored for x,
 159                         r, R lines.</para>
 160                 </refsect2>
 161
 162                 <refsect2>
 163                         <title>Age</title>
 164                         <para>The date field, when set, is used to
 165                         decide what files to delete when cleaning. If
 166                         a file or directory is older than the current
 167                         time minus the age field it is deleted. The
 168                         field format is a series of integers each
 169                         followed by one of the following
 170                         postfixes for the respective time units:</para>
 171
 172                         <variablelist>
 173                                 <varlistentry>
 174                                 <term><varname>s</varname></term>
 175                                 <term><varname>min</varname></term>
 176                                 <term><varname>h</varname></term>
 177                                 <term><varname>d</varname></term>
 178                                 <term><varname>w</varname></term>
 179                                 <term><varname>ms</varname></term>
 180                                 <term><varname>m</varname></term>
 181                                 <term><varname>us</varname></term></varlistentry>
 182                         </variablelist>
 183
 184                         <para>If multiple integers and units are specified the time values are summed up.</para>
 185
 186                         <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>
 187
 188                 </refsect2>
 189
 190         </refsect1>
 191
 192         <refsect1>
 193                 <title>Example</title>
 194                 <example>
 195                         <title>/etc/tmpfiles.d/screen.conf example</title>
 196                         <para><command>screen</command> needs two directories created at boot with specific modes and ownership.</para>
 197
 198                         <programlisting>d /var/run/screens 1777 root root 10d
 199 d /var/run/uscreens 0755 root root 10d12h</programlisting>
 200                 </example>
 201         </refsect1>
 202
 203         <refsect1>
 204                 <title>See Also</title>
 205                 <para>
 206                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 207                         <citerefentry><refentrytitle>systemd-tmpfiles</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 208                 </para>
 209         </refsect1>
 210
 211 </refentry>