df99a9ef5b
Both plain opendir() and glob() will bump access time. Privileged option O_NOATIME can be used to prevent the access time from being updated. We already used it for subdirectories of the directories which we were cleaning up. But for the directories specified directly in the config files, we wouldn't do that. This means that, paradoxically, our own temporary directories for PrivateTmp would stay around forever, as long as one let systemd-tmpfiles-clean.service run regularly, because they had their own glob patterns specified. https://bugzilla.redhat.com/show_bug.cgi?id=1183684
216 lines
10 KiB
XML
216 lines
10 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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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><filename>systemd-tmpfiles-setup.service</filename></para>
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<para><filename>systemd-tmpfiles-setup-dev.service</filename></para>
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<para><filename>systemd-tmpfiles-clean.service</filename></para>
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<para><filename>systemd-tmpfiles-clean.timer</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> creates,
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deletes, and cleans up volatile and temporary files and
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directories, based on the configuration file format and
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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
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directives from all configuration files. If one or
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more filenames are passed on the command line, only
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the directives in these files are applied. If only
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the basename of a configuration file is specified,
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all 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.</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
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passed, all files and directories
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marked with <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> in the
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configuration files are created or
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written to. Files and directories
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marked with <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
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ownership, access mode and security
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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
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passed, all files and directories with
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an age parameter configured will be
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cleaned 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
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passed, the contents of
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directories marked with
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<varname>D</varname> or
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<varname>R</varname>, and files or
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directories themselves marked with
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<varname>r</varname> or
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<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>--boot</option></term>
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<listitem><para>Also execute lines
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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 that
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apply to paths with the specified
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prefix. This option can be specified
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multiple 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 that
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apply to paths with the specified
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prefix. This option can be specified
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multiple 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
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as an argument. All paths will be
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prefixed with the given alternate <replaceable>root</replaceable>
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path, including config search paths.
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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
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<option>--create</option>, <option>--clean</option>,
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and <option>--remove</option> in one invocation. For
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example, during boot the following command line is
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executed to ensure that all temporary and volatile
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directories are removed and created according to the
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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
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avoid changing the access and modification times on
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the directories it accesses, which requires
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<constant>CAP_ADMIN</constant> privileges. When
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running as non-root, directories which are checked for
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files to clean up will have their access time bumped,
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which might prevent 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, a non-zero failure
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code otherwise.</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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