mirror of
https://github.com/systemd/systemd.git
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3c84514d07
CAP_ADMIN does not exist (the closest existing capability name would be CAP_SYS_ADMIN), and according to man:open(2) and man:capabilities(7), the capability required to specify O_NOATIME is actually CAP_FOWNER.
245 lines
9.7 KiB
XML
245 lines
9.7 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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SPDX-License-Identifier: LGPL-2.1+
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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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="systemd-tmpfiles"
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>systemd-tmpfiles</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</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>systemd-tmpfiles</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-tmpfiles</refname>
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<refname>systemd-tmpfiles-setup.service</refname>
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<refname>systemd-tmpfiles-setup-dev.service</refname>
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<refname>systemd-tmpfiles-clean.service</refname>
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<refname>systemd-tmpfiles-clean.timer</refname>
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<refpurpose>Creates, deletes and cleans up volatile
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and temporary files and directories</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>systemd-tmpfiles</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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<arg choice="opt" rep="repeat"><replaceable>CONFIGFILE</replaceable></arg>
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</cmdsynopsis>
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<para>System units:
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<literallayout><filename>systemd-tmpfiles-setup.service</filename>
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<filename>systemd-tmpfiles-setup-dev.service</filename>
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<filename>systemd-tmpfiles-clean.service</filename>
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<filename>systemd-tmpfiles-clean.timer</filename></literallayout></para>
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<para>User units:
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<literallayout><filename>systemd-tmpfiles-setup.service</filename>
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<filename>systemd-tmpfiles-clean.service</filename>
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<filename>systemd-tmpfiles-clean.timer</filename></literallayout></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> creates, deletes, and
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cleans up volatile and temporary files and directories, based on
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the configuration file format and location specified in
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<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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</para>
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<para>If invoked with no arguments, it applies all directives from all configuration
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files. When invoked with <option>--replace=<replaceable>PATH</replaceable></option>,
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arguments specified on the command line are used instead of the configuration file
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<replaceable>PATH</replaceable>. Otherwise, if one or more absolute filenames are
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passed on the command line, only the directives in these files are applied. If
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<literal>-</literal> is specified instead of a filename, directives are read from
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standard input. If only the basename of a configuration file is specified, all
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configuration directories as specified in
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<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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are searched for a matching file and the file found that has the highest priority is
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executed.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>The following options are understood:</para>
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<variablelist>
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<varlistentry>
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<term><option>--create</option></term>
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<listitem><para>If this option is passed, all files and
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directories marked with
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<varname>f</varname>,
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<varname>F</varname>,
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<varname>w</varname>,
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<varname>d</varname>,
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<varname>D</varname>,
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<varname>v</varname>,
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<varname>p</varname>,
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<varname>L</varname>,
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<varname>c</varname>,
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<varname>b</varname>,
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<varname>m</varname>
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in the configuration files are created or written to. Files
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and directories marked with
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<varname>z</varname>,
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<varname>Z</varname>,
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<varname>t</varname>,
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<varname>T</varname>,
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<varname>a</varname>, and
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<varname>A</varname> have their ownership, access mode and
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security labels set.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--clean</option></term>
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<listitem><para>If this option is passed, all files and
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directories with an age parameter configured will be cleaned
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up.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--remove</option></term>
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<listitem><para>If this option is passed, the contents of
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directories marked with <varname>D</varname> or
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<varname>R</varname>, and files or directories themselves
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marked with <varname>r</varname> or <varname>R</varname> are
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removed.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--user</option></term>
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<listitem><para>Execute "user" configuration, i.e. <filename>tmpfiles.d</filename>
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files in user configuration directories.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--boot</option></term>
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<listitem><para>Also execute lines with an exclamation mark.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--prefix=<replaceable>path</replaceable></option></term>
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<listitem><para>Only apply rules with paths that start with
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the specified prefix. This option can be specified multiple
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times.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--exclude-prefix=<replaceable>path</replaceable></option></term>
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<listitem><para>Ignore rules with paths that start with the
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specified prefix. This option can be specified multiple
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times.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--root=<replaceable>root</replaceable></option></term>
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<listitem><para>Takes a directory path as an argument. All paths will be prefixed with the given alternate
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<replaceable>root</replaceable> path, including config search paths.</para>
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<para>Note that this option does not alter how the users and groups specified in the configuration files are
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resolved. With or without this option, users and groups are always resolved according to the host's user and
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group databases, any such databases stored under the specified root directories are not
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consulted.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--replace=<replaceable>PATH</replaceable></option></term>
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<listitem><para>When this option is given, one ore more positional arguments
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must be specified. All configuration files found in the directories listed in
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<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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will be read, and the configuration given on the command line will be
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handled instead of and with the same priority as the configuration file
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<replaceable>PATH</replaceable>.</para>
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<para>This option is intended to be used when package installation scripts
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are running and files belonging to that package are not yet available on
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disk, so their contents must be given on the command line, but the admin
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configuration might already exist and should be given higher priority.
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</para></listitem>
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</varlistentry>
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<xi:include href="standard-options.xml" xpointer="help" />
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<xi:include href="standard-options.xml" xpointer="version" />
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</variablelist>
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<para>It is possible to combine <option>--create</option>,
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<option>--clean</option>, and <option>--remove</option> in one
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invocation. For example, during boot the following command line is
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executed to ensure that all temporary and volatile directories are
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removed and created according to the configuration file:</para>
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<programlisting>systemd-tmpfiles --remove --create</programlisting>
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</refsect1>
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<refsect1>
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<title>Unprivileged --cleanup operation</title>
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<para><command>systemd-tmpfiles</command> tries to avoid changing
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the access and modification times on the directories it accesses,
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which requires <constant>CAP_FOWNER</constant> privileges. When
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running as non-root, directories which are checked for files to
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clean up will have their access time bumped, which might prevent
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their cleanup.
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</para>
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</refsect1>
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<refsect1>
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<title>Exit status</title>
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<para>On success, 0 is returned. If the configuration was invalid (invalid syntax, missing
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arguments, …), so some lines had to be ignored, but no other errors occurred,
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<constant>65</constant> is returned (<constant>EX_DATAERR</constant> from
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<filename>/usr/include/sysexits.h</filename>). Otherwise, <constant>1</constant> is returned
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(<constant>EXIT_FAILURE</constant> from <filename>/usr/include/stdlib.h</filename>).
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</para>
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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>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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