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5430f7f2bc
We finally got the OK from all contributors with non-trivial commits to relicense systemd from GPL2+ to LGPL2.1+. Some udev bits continue to be GPL2+ for now, but we are looking into relicensing them too, to allow free copy/paste of all code within systemd. The bits that used to be MIT continue to be MIT. The big benefit of the relicensing is that closed source code may now link against libsystemd-login.so and friends.
301 lines
15 KiB
XML
301 lines
15 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 Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser 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>/etc/tmpfiles.d/*.conf</filename></para>
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<para><filename>/run/tmpfiles.d/*.conf</filename></para>
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<para><filename>/usr/lib/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>. Files in
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<filename>/etc/</filename> override files with the
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same name in <filename>/usr/lib/</filename>. Files in
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<filename>/run</filename> override files with the same
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name in <filename>/etc/</filename> and
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<filename>/usr/lib/</filename>. Packages should
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install their configuration files in
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<filename>/usr/lib/</filename>, files in
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<filename>/etc/</filename> are reserved for the local
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administrator, who may choose to override the
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configurations installed from packages. The list of
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configuration files are sorted by their filename in
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alphabetical order, regardless in which of the
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directories they reside, to guarantee that a
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configuration file takes precedence over another
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configuration file with an alphabetically later
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name.</para>
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<para>The configuration format is one line per path
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containing action, path, mode, ownership, age and argument
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fields:</para>
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<programlisting>Type Path Mode UID GID Age Argument
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d /run/user 0755 root root 10d -
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L /tmp/foobar - - - - /dev/null</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 (optionally writing a short string into it, if the argument parameter is passed)</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 (optionally writing a short string into it, if the argument parameter is passed)</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>w</varname></term>
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<listitem><para>Write the argument parameter to a file, if it exists.</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>L</varname></term>
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<listitem><para>Create a symlink if it doesn't exist yet</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>c</varname></term>
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<listitem><para>Create a character device node if it doesn't exist yet</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>b</varname></term>
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<listitem><para>Create a block device node 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>Restore
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SELinux security context label
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and set ownership and access
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mode of a file or directory if
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it exists. Lines of this type
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accept shell-style globs in
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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
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restore SELinux security
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context label and set
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ownership and access mode of a
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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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</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 all other file
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objects. For z, Z lines if omitted or when set
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to - the file access mode will not be
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modified. This parameter is ignored for x, r,
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R, L 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, L 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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<refsect2>
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<title>Argument</title>
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<para>For L lines determines the destination
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path of the symlink. For c, b determines the
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major/minor of the device node, with major and
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minor formatted as integers, separated by :,
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e.g. "1:3". For f, F, w may be used to specify
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a short string that is written to the file,
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suffixed by a newline. Ignored for all other
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lines.</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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