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258 lines
12 KiB
XML
258 lines
12 KiB
XML
<?xml version="1.0"?>
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<!--*-nxml-*-->
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<!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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<!--
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This file is part of systemd.
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Copyright 2010 Brandon Philips
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="tmpfiles.d">
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<refentryinfo>
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<title>tmpfiles.d</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Documentation</contrib>
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<firstname>Brandon</firstname>
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<surname>Philips</surname>
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<email>brandon@ifup.org</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>tmpfiles.d</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>tmpfiles.d</refname>
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<refpurpose>Configuration for creation, deletion and
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cleaning of volatile and temporary files</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>/usr/lib/tmpfiles.d/*.conf</filename></para>
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<para><filename>/etc/tmpfiles.d/*.conf</filename></para>
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<para><filename>/run/tmpfiles.d/*.conf</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><command>systemd-tmpfiles</command> uses the
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configuration files from the above directories to describe the
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creation, cleaning and removal of volatile and
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temporary files and directories which usually reside
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in directories such as <filename>/run</filename>
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or <filename>/tmp</filename>.</para>
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</refsect1>
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<refsect1>
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<title>Configuration Format</title>
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<para>Each configuration file is named in the style of
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<filename><program>.conf</filename>.
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Files in <filename>/etc/</filename> overwrite
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files with the same name in <filename>/usr/lib/</filename>.
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Files in <filename>/run</filename> overwrite files with
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the same name in <filename>/etc/</filename> and
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<filename>/usr/lib/</filename>. Packages should install their
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configuration files in <filename>/usr/lib/</filename>, files
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in <filename>/etc/</filename> are reserved for the local
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administration, which possibly decides to overwrite the
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configurations installed from packages. All files are sorted
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by filename in alphabetical order, regardless in which of the
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directories they reside, to ensure that a specific
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configuration file takes precedence over another file with
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an alphabetically later name.</para>
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<para>The configuration format is one line per path
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containing action, mode, ownership and age
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fields:</para>
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<programlisting>Type Path Mode UID GID Age
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d /run/user 0755 root root 10d</programlisting>
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<refsect2>
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<title>Type</title>
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<variablelist>
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<varlistentry>
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<term><varname>f</varname></term>
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<listitem><para>Create a file if it doesn't exist yet</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>F</varname></term>
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<listitem><para>Create or truncate a file</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>d</varname></term>
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<listitem><para>Create a directory if it doesn't exist yet</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>D</varname></term>
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<listitem><para>Create or empty a directory</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>p</varname></term>
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<listitem><para>Create a named pipe (FIFO) if it doesn't exist yet</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>x</varname></term>
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<listitem><para>Ignore a path
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during cleaning. Use this type
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to exclude paths from clean-up
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as controlled with the Age
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parameter. Note that lines of
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this type do not influence the
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effect of r or R lines. Lines
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of this type accept
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shell-style globs in place of
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of normal path
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names.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>r</varname></term>
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<listitem><para>Remove a file
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or directory if it
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exists. This may not be used
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to remove non-empty
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directories, use R for
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that. Lines of this type
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accept shell-style globs in
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place of normal path
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names.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>R</varname></term>
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<listitem><para>Recursively
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remove a path and all its
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subdirectories (if it is a
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directory). Lines of this type
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accept shell-style globs in
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place of normal path
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names.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>z</varname></term>
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<listitem><para>Set ownership, access
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mode and relabel security context of
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a file or directory if it exists.
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Lines of this type accept shell-style
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globs in place of normal path names.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Z</varname></term>
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<listitem><para>Recursively set
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ownership, access mode and relabel
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security context of a path and
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all its subdirectories (if it is a
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directory). Lines of this type accept
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shell-style globs in place of normal
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path names.</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2>
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<title>Mode</title>
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<para>The file access mode to use when
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creating this file or directory. If omitted or
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when set to - the default is used: 0755 for
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directories, 0644 for files. For z, Z lines
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if omitted or when set to - the file access mode will
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not be modified. This parameter is ignored for x, r, R
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lines.</para>
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</refsect2>
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<refsect2>
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<title>UID, GID</title>
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<para>The user and group to use for this file
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or directory. This may either be a numeric
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user/group ID or a user or group name. If
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omitted or when set to - the default 0 (root)
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is used. For z, Z lines when omitted or when set to -
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the file ownership will not be modified.
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These parameters are ignored for x, r, R lines.</para>
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</refsect2>
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<refsect2>
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<title>Age</title>
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<para>The date field, when set, is used to
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decide what files to delete when cleaning. If
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a file or directory is older than the current
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time minus the age field it is deleted. The
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field format is a series of integers each
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followed by one of the following
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postfixes for the respective time units:</para>
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<variablelist>
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<varlistentry>
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<term><varname>s</varname></term>
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<term><varname>min</varname></term>
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<term><varname>h</varname></term>
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<term><varname>d</varname></term>
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<term><varname>w</varname></term>
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<term><varname>ms</varname></term>
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<term><varname>m</varname></term>
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<term><varname>us</varname></term></varlistentry>
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</variablelist>
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<para>If multiple integers and units are specified the time
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values are summed up.</para>
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<para>The age field only applies to lines starting with
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d, D and x. If omitted or set to - no automatic clean-up
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is done.</para>
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</refsect2>
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</refsect1>
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<refsect1>
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<title>Example</title>
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<example>
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<title>/etc/tmpfiles.d/screen.conf example</title>
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<para><command>screen</command> needs two directories created at boot with specific modes and ownership.</para>
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<programlisting>d /var/run/screens 1777 root root 10d
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d /var/run/uscreens 0755 root root 10d12h</programlisting>
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</example>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-tmpfiles</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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