mirror of
https://github.com/systemd/systemd.git
synced 2024-11-06 16:59:03 +03:00
72f4d9669c
This is a recurring submission and includes corrections to various issue spotted. I guess I can just skip over reporting ubiquitous comma placement fixes…
414 lines
22 KiB
XML
414 lines
22 KiB
XML
<?xml version="1.0"?>
|
|
<!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
<!--
|
|
This file is part of systemd.
|
|
|
|
Copyright 2010 Brandon Philips
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
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
|
|
Lesser General Public License for more details.
|
|
|
|
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">
|
|
|
|
<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 volatile and temporary files</refpurpose>
|
|
</refnamediv>
|
|
|
|
<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 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>/run</filename>
|
|
or <filename>/tmp</filename>.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Configuration Format</title>
|
|
|
|
<para>Each configuration file shall be named in the
|
|
style of <filename><package>.conf</filename>.
|
|
Files in <filename>/etc/</filename> override files
|
|
with the same name in <filename>/usr/lib/</filename>
|
|
and <filename>/run/</filename>. Files in
|
|
<filename>/run/</filename> override files with the same
|
|
name in <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 use this logic to override the
|
|
configuration files installed by vendor packages. All
|
|
configuration files are sorted by their filename in
|
|
lexicographic order, regardless in which of the
|
|
directories they reside. If multiple files specify the
|
|
same path, the entry in the file with the lexicographically
|
|
earliest name will be applied, all all other conflicting
|
|
entries logged as errors.</para>
|
|
|
|
<para>If the administrator wants to disable a
|
|
configuration file supplied by the vendor, the
|
|
recommended way is to place a symlink to
|
|
<filename>/dev/null</filename> in
|
|
<filename>/etc/tmpfiles.d/</filename> bearing the
|
|
same filename.</para>
|
|
|
|
<para>The configuration format is one line per path
|
|
containing action, path, mode, ownership, age and argument
|
|
fields:</para>
|
|
|
|
<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>
|
|
|
|
<para>The following line types are understood:</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><varname>f</varname></term>
|
|
<listitem><para>Create a file if it does not 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 (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 the file exists.
|
|
Lines of this type accept shell-style globs in place of normal path
|
|
names. The argument parameter will be written without a trailing
|
|
newline. C-style backslash escapes are interpreted.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>d</varname></term>
|
|
<listitem><para>Create a directory if it does not exist yet</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>D</varname></term>
|
|
<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 does not exist yet</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>L</varname></term>
|
|
<listitem><para>Create a symlink if it does not exist yet</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>c</varname></term>
|
|
<listitem><para>Create a character device node if it does not exist yet</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>b</varname></term>
|
|
<listitem><para>Create a block device node if it does not exist yet</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>m</varname></term>
|
|
<listitem><para>If the
|
|
specified file path exists,
|
|
adjust its access mode, group
|
|
and user to the specified
|
|
values and reset the SELinux
|
|
label. If it does not exist, do
|
|
nothing.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>x</varname></term>
|
|
<listitem><para>Ignore a path
|
|
during cleaning. Use this type
|
|
to exclude paths from clean-up
|
|
as controlled with the Age
|
|
parameter. Note that lines of
|
|
this type do not influence the
|
|
effect of r or R lines. Lines
|
|
of this type accept
|
|
shell-style globs in place of
|
|
normal path
|
|
names.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>X</varname></term>
|
|
<listitem><para>Ignore a path
|
|
during cleaning. Use this type
|
|
to exclude paths from clean-up
|
|
as controlled with the Age
|
|
parameter. Unlike x, this
|
|
parameter will not exclude the
|
|
content if path is a directory,
|
|
but only directory itself.
|
|
Note that lines of this type do
|
|
not influence the effect of r
|
|
or R lines. Lines of this type
|
|
accept shell-style globs in
|
|
place of normal path
|
|
names.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>r</varname></term>
|
|
<listitem><para>Remove a file
|
|
or directory if it
|
|
exists. This may not be used
|
|
to remove non-empty
|
|
directories, use R for
|
|
that. Lines of this type
|
|
accept shell-style globs in
|
|
place of normal path
|
|
names.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>R</varname></term>
|
|
<listitem><para>Recursively
|
|
remove 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>
|
|
|
|
<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>
|
|
|
|
<refsect2>
|
|
<title>Path</title>
|
|
|
|
<para>The file system path specification supports simple specifier
|
|
expansion. The following expansions are
|
|
understood:</para>
|
|
|
|
<table>
|
|
<title>Specifiers available</title>
|
|
<tgroup cols='3' align='left' colsep='1' rowsep='1'>
|
|
<colspec colname="spec" />
|
|
<colspec colname="mean" />
|
|
<colspec colname="detail" />
|
|
<thead>
|
|
<row>
|
|
<entry>Specifier</entry>
|
|
<entry>Meaning</entry>
|
|
<entry>Details</entry>
|
|
</row>
|
|
</thead>
|
|
<tbody>
|
|
<row>
|
|
<entry><literal>%m</literal></entry>
|
|
<entry>Machine ID</entry>
|
|
<entry>The machine ID of the running system, formatted as string. See <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more information.</entry>
|
|
</row>
|
|
<row>
|
|
<entry><literal>%b</literal></entry>
|
|
<entry>Boot ID</entry>
|
|
<entry>The boot ID of the running system, formatted as string. See <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry> for more information.</entry>
|
|
</row>
|
|
<row>
|
|
<entry><literal>%H</literal></entry>
|
|
<entry>Host name</entry>
|
|
<entry>The hostname of the running system.</entry>
|
|
</row>
|
|
<row>
|
|
<entry><literal>%v</literal></entry>
|
|
<entry>Kernel release</entry>
|
|
<entry>Identical to <command>uname -r</command> output.</entry>
|
|
</row>
|
|
<row>
|
|
<entry><literal>%%</literal></entry>
|
|
<entry>Escaped %</entry>
|
|
<entry>Single percent sign.</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title>Mode</title>
|
|
|
|
<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 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>
|
|
<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
|
|
omitted or when set to -, the default 0 (root)
|
|
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>
|
|
<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. If an integer is given without a unit,
|
|
s is assumed.
|
|
</para>
|
|
|
|
<para>When the age is set to zero, the files are cleaned
|
|
unconditionally.</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>If the age field starts with a tilde
|
|
character (~), the clean-up is only applied to
|
|
files and directories one level inside the
|
|
directory specified, but not the files and
|
|
directories immediately inside it.</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>
|
|
|
|
<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>
|
|
<example>
|
|
<title>/etc/tmpfiles.d/abrt.conf example</title>
|
|
<para><command>abrt</command> needs a directory created at boot with specific mode and ownership and its content should be preserved.</para>
|
|
|
|
<programlisting>d /var/tmp/abrt 0755 abrt abrt
|
|
x /var/tmp/abrt/*</programlisting>
|
|
</example>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd-tmpfiles</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd-delta</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|