man/systemd-inhibit.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 2012 Lennart Poettering

  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="systemd-inhibit">

        <refentryinfo>
                <title>systemd-inhibit</title>
                <productname>systemd</productname>

                <authorgroup>
                        <author>
                                <contrib>Developer</contrib>
                                <firstname>Lennart</firstname>
                                <surname>Poettering</surname>
                                <email>lennart@poettering.net</email>
                        </author>
                </authorgroup>
        </refentryinfo>

        <refmeta>
                <refentrytitle>systemd-inhibit</refentrytitle>
                <manvolnum>1</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>systemd-inhibit</refname>
                <refpurpose>Execute a program with an inhibition lock taken</refpurpose>
        </refnamediv>

        <refsynopsisdiv>
                <cmdsynopsis>
                        <command>systemd-inhibit <arg choice="opt" rep="repeat">OPTIONS</arg> <arg>COMMAND</arg> <arg choice="opt" rep="repeat">ARGUMENTS</arg></command>
                </cmdsynopsis>
                <cmdsynopsis>
                        <command>systemd-inhibit <arg choice="opt" rep="repeat">OPTIONS</arg> --list</command>
                </cmdsynopsis>
        </refsynopsisdiv>

        <refsect1>
                <title>Description</title>

                <para><command>systemd-inhibit</command> may be used
                to execute a program with a shutdown, sleep or idle
                inhibitor lock taken. The lock will be acquired before
                the specified command line is executed and released
                afterwards.</para>

                <para>Inhibitor locks may be used to block or delay
                system sleep and shutdown requests from the user, as well
                as automatic idle handling of the OS. This is useful
                to avoid system suspends while an optical disc is
                being recorded, or similar operations that should not
                be interrupted.</para>

                <para>For more information see the <ulink
                url="http://www.freedesktop.org/wiki/Software/systemd/inhibit">Inhibitor
                Lock Developer Documentation</ulink>.</para>
        </refsect1>

        <refsect1>
                <title>Options</title>

                <para>The following options are understood:</para>

                <variablelist>
                        <varlistentry>
                                <term><option>-h</option></term>
                                <term><option>--help</option></term>

                                <listitem><para>Prints a short help
                                text and exits.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>--version</option></term>

                                <listitem><para>Prints a short version
                                string and exits.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>--what=</option></term>

                                <listitem><para>Takes a colon-separated
                                list of one or more
                                operations to inhibit:
                                <literal>shutdown</literal>,
                                <literal>sleep</literal>,
                                <literal>idle</literal>,
                                <literal>handle-power-key</literal>,
                                <literal>handle-suspend-key</literal>,
                                <literal>handle-hibernate-key</literal>,
                                <literal>handle-lid-switch</literal>,
                                for inhibiting
                                reboot/power-off/halt/kexec,
                                suspending/hibernating, the automatic
                                idle detection, or the low-level
                                handling of the power/sleep key and
                                the lid switch, respectively. If omitted,
                                defaults to
                                <literal>idle:sleep:shutdown</literal>.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>--who=</option></term>

                                <listitem><para>Takes a short,
                                human-readable descriptive string for the
                                program taking the lock. If not passed,
                                defaults to the command line
                                string.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>--why=</option></term>

                                <listitem><para>Takes a short,
                                human-readable descriptive string for the
                                reason for taking the lock. Defaults
                                to "Unknown reason".</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>--mode=</option></term>

                                <listitem><para>Takes either
                                <literal>block</literal> or
                                <literal>delay</literal> and describes
                                how the lock is applied. If
                                <literal>block</literal> is used (the
                                default), the lock prohibits any of
                                the requested operations without time
                                limit, and only privileged users may
                                override it. If
                                <literal>delay</literal> is used, the
                                lock can only delay the requested
                                operations for a limited time. If the
                                time elapses, the lock is ignored and
                                the operation executed. The time limit
                                may be specified in
                                <citerefentry><refentrytitle>systemd-logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>. Note
                                that <literal>delay</literal> is only
                                available for <literal>sleep</literal>
                                and
                                <literal>shutdown</literal>.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>--list</option></term>

                                <listitem><para>Lists all active
                                inhibition locks instead of acquiring
                                one.</para></listitem>
                        </varlistentry>
                </variablelist>

        </refsect1>

        <refsect1>
                <title>Exit status</title>

                <para>Returns the exit status of the executed program.</para>
        </refsect1>

        <refsect1>
                <title>Example</title>

                <programlisting># systemd-inhibit wodim foobar.iso</programlisting>

                <para>This burns the ISO image
                <filename>foobar.iso</filename> on a CD using
                <citerefentry><refentrytitle>wodim</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                and inhibits system sleeping, shutdown and idle while
                doing so.</para>
        </refsect1>

        <refsect1>
                <title>See Also</title>
                <para>
                        <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                        <citerefentry><refentrytitle>systemd-logind.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                </para>
        </refsect1>

</refentry>