Systemd/man/tmpfiles.d.xml

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  Copyright 2010 Brandon Philips

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<refentry id="tmpfiles.d">

        <refentryinfo>
                <title>tmpfiles.d</title>
                <productname>systemd</productname>

                <authorgroup>
                        <author>
                                <contrib>Documentation</contrib>
                                <firstname>Brandon</firstname>
                                <surname>Philips</surname>
                                <email>brandon@ifup.org</email>
                        </author>
                </authorgroup>
        </refentryinfo>

        <refmeta>
                <refentrytitle>tmpfiles.d</refentrytitle>
                <manvolnum>5</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>tmpfiles.d</refname>
                <refpurpose>configuration for creation, deletion and cleaning of tmpfiles</refpurpose>
        </refnamediv>

        <refsect1>
                <title>Description</title>

		<para><command>systemd</command> uses
		<filename>/etc/tmpfiles.d/</filename> to describe the
		creation, cleaning and removal of temporary files and
		directories which usually reside in
		<filename>/var/run</filename> or
		<filename>/tmp</filename>).  Each configuration file
		is named in the style of
		<filename>/etc/tmpfiles.d/&lt;program&gt;.conf</filename></para>
        </refsect1>

        <refsect1>
		<title>Configuration Format</title>

		<para>The configuration format is one line per path
		containing action, mode, ownership and age
		fields:</para>

                <programlisting>Type Path          Mode UID  GID  Age
d    /var/run/user 0755 root root 10d</programlisting>

                <refsect2>
                        <title>Type</title>
                        <variablelist>
                                <varlistentry>
                                        <term><varname>f</varname></term>
                                        <listitem><para>create a file if it doesn't exist yet</para></listitem>
                                </varlistentry>

                                <varlistentry>
                                        <term><varname>F</varname></term>
                                        <listitem><para>create or truncate a file</para></listitem>
                                </varlistentry>

                                <varlistentry>
                                        <term><varname>d</varname></term>
                                        <listitem><para>create a directory if it doesn't exist yet</para></listitem>
                                </varlistentry>

                                <varlistentry>
                                        <term><varname>D</varname></term>
                                        <listitem><para>create or empty a directory</para></listitem>
                                </varlistentry>

                                <varlistentry>
                                        <term><varname>x</varname></term>
                                        <listitem><para>ignore a path</para></listitem>
                                </varlistentry>

                                <varlistentry>
                                        <term><varname>r</varname></term>
                                        <listitem><para>remove a path</para></listitem>
                                </varlistentry>

                                <varlistentry>
                                        <term><varname>R</varname></term>
                                        <listitem><para>recursively remove a path</para></listitem>
                                </varlistentry>
                        </variablelist>
                </refsect2>

                <refsect2>
                        <title>Mode</title>

                        <para>The file access mode to use for this
                        file or directory. If ommited or when set to -
                        the default is used: 0755 for directories,
                        0644 for files.</para>
                </refsect2>

                <refsect2>
                        <title>UID, GID</title>

                        <para>The user and group to use for this file
                        or directory. This may either be a numeric
                        user/group ID or a user or group name. If
                        ommited or when set to - the default 0 is
                        used.</para>
                </refsect2>

                <refsect2>
                        <title>Age</title>
                        <para>The date field, when set, is used to
                        decide what files to delete when cleaning. If
                        a file or directory is older than the current
                        time minus the age field it is deleted. The
                        field format is a series of integers each
                        followed by one of the following
                        postfixes for the respective time units:</para>

                        <variablelist>
                                <varlistentry>
                                <term><varname>s</varname></term>
                                <term><varname>min</varname></term>
                                <term><varname>h</varname></term>
                                <term><varname>d</varname></term>
                                <term><varname>w</varname></term>
                                <term><varname>ms</varname></term>
                                <term><varname>m</varname></term>
                                <term><varname>us</varname></term></varlistentry>
                        </variablelist>

                        <para>If multiple integers and units are specified the time values are summed up.</para>

                        <para>The age field only applies to lines starting with d, D and x. If ommited or set to - no automatic clean-up is done.</para>

                </refsect2>

        </refsect1>

        <refsect1>
                <title>Example</title>
                <example>
                        <title>/etc/tmpfiles.d/screen.conf example</title>
                        <para><command>screen</command> needs two directories created at boot with specific modes and ownership.</para>

                        <programlisting>d /var/run/screens 1777 root root 10d
d /var/run/uscreens 0755 root root 10d12h</programlisting>
                </example>
        </refsect1>

        <refsect1>
                <title>See Also</title>
                <para>
                        <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                </para>
        </refsect1>

</refentry>