Copyright 2010 Brandon Philips
systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="tmpfiles.d">
<refsynopsisdiv>
<para><filename>/etc/tmpfiles.d/*.conf</filename></para>
+ <para><filename>/run/tmpfiles.d/*.conf</filename></para>
+ <para><filename>/usr/lib/tmpfiles.d/*.conf</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>systemd-tmpfiles</command> uses the
- configuration files in
- <filename>/etc/tmpfiles.d/</filename> to describe the
+ configuration files from the above directories to describe the
creation, cleaning and removal of volatile and
temporary files and directories which usually reside
- in directories such as <filename>/var/run</filename>
- or <filename>/tmp</filename>. Each configuration file
- is named in the style of
- <filename>/etc/tmpfiles.d/<program>.conf</filename>.</para>
+ in directories such as <filename>/run</filename>
+ or <filename>/tmp</filename>.</para>
</refsect1>
<refsect1>
<title>Configuration Format</title>
+ <para>Each configuration file is named in the style of
+ <filename><program>.conf</filename>. Files in
+ <filename>/etc/</filename> override files with the
+ same name in <filename>/usr/lib/</filename>. Files in
+ <filename>/run</filename> override files with the same
+ name in <filename>/etc/</filename> and
+ <filename>/usr/lib/</filename>. Packages should
+ install their configuration files in
+ <filename>/usr/lib/</filename>, files in
+ <filename>/etc/</filename> are reserved for the local
+ administrator, who may choose to override the
+ configurations installed from packages. The list of
+ configuration files are sorted by their filename in
+ alphabetical order, regardless in which of the
+ directories they reside, to guarantee that a
+ configuration file takes precedence over another
+ configuration file with an alphabetically later
+ name.</para>
+
<para>The configuration format is one line per path
- containing action, mode, ownership and age
+ containing action, path, mode, ownership, age and argument
fields:</para>
- <programlisting>Type Path Mode UID GID Age
-d /var/run/user 0755 root root 10d</programlisting>
+ <programlisting>Type Path Mode UID GID Age Argument
+d /run/user 0755 root root 10d -
+L /tmp/foobar - - - - /dev/null</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>
+ <listitem><para>Create a file if it doesn't exist yet (optionally writing a short string into it, if the argument parameter is passed)</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>F</varname></term>
- <listitem><para>Create or truncate a file</para></listitem>
+ <listitem><para>Create or truncate a file (optionally writing a short string into it, if the argument parameter is passed)</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>w</varname></term>
+ <listitem><para>Write the argument parameter to a file, if it exists.</para></listitem>
</varlistentry>
<varlistentry>
<listitem><para>Create or empty a directory</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>p</varname></term>
+ <listitem><para>Create a named pipe (FIFO) if it doesn't exist yet</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>L</varname></term>
+ <listitem><para>Create a symlink if it doesn't exist yet</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>c</varname></term>
+ <listitem><para>Create a character device node if it doesn't exist yet</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>b</varname></term>
+ <listitem><para>Create a block device node if it doesn't exist yet</para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><varname>x</varname></term>
<listitem><para>Ignore a path
place of normal path
names.</para></listitem>
</varlistentry>
+
+ <varlistentry>
+ <term><varname>z</varname></term>
+ <listitem><para>Restore
+ SELinux security context label
+ and set ownership and access
+ mode of a file or directory if
+ it exists. Lines of this type
+ accept shell-style globs in
+ place of normal path names.
+ </para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>Z</varname></term>
+ <listitem><para>Recursively
+ restore SELinux security
+ context label and set
+ ownership and access mode of a
+ path and all its
+ subdirectories (if it is a
+ directory). Lines of this type
+ accept shell-style globs in
+ place of normal path
+ names.</para></listitem>
+ </varlistentry>
</variablelist>
</refsect2>
<para>The file access mode to use when
creating this file or directory. If omitted or
when set to - the default is used: 0755 for
- directories, 0644 for files. This parameter is
- ignored for x, r, R lines.</para>
+ directories, 0644 for all other file
+ objects. For z, Z lines if omitted or when set
+ to - the file access mode will not be
+ modified. This parameter is ignored for x, r,
+ R, L lines.</para>
</refsect2>
<refsect2>
or directory. This may either be a numeric
user/group ID or a user or group name. If
omitted or when set to - the default 0 (root)
- is used. . These parameters are ignored for x,
- r, R lines.</para>
+ is used. For z, Z lines when omitted or when set to -
+ the file ownership will not be modified.
+ These parameters are ignored for x, r, R, L lines.</para>
</refsect2>
<refsect2>
<term><varname>us</varname></term></varlistentry>
</variablelist>
- <para>If multiple integers and units are specified the time values are summed up.</para>
+ <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 omitted or set to - no automatic clean-up is done.</para>
+ <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>
+ </refsect2>
+ <refsect2>
+ <title>Argument</title>
+
+ <para>For L lines determines the destination
+ path of the symlink. For c, b determines the
+ major/minor of the device node, with major and
+ minor formatted as integers, separated by :,
+ e.g. "1:3". For f, F, w may be used to specify
+ a short string that is written to the file,
+ suffixed by a newline. Ignored for all other
+ lines.</para>
</refsect2>
</refsect1>
<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
+ <programlisting>d /var/run/screens 1777 root root 10d
d /var/run/uscreens 0755 root root 10d12h</programlisting>
</example>
</refsect1>