mirror of
https://github.com/systemd/systemd.git
synced 2024-11-23 18:23:32 +08:00
ccc9a4f9ff
New sections are added: PAM options, crypttab options, commandline options, miscellaneous. The last category will be used for all untagged <varname> elements. Commandline options sections is meant to be a developer tool: when adding an option it is sometimes useful to be able to check if similarly named options exist elsewhere.
155 lines
5.5 KiB
XML
155 lines
5.5 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 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="runlevel">
|
|
|
|
<refentryinfo>
|
|
<title>runlevel</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>runlevel</refentrytitle>
|
|
<manvolnum>8</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>runlevel</refname>
|
|
<refpurpose>Print previous and current SysV runlevel</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<cmdsynopsis>
|
|
<command>runlevel <arg choice="opt" rep="repeat">options</arg></command>
|
|
</cmdsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><command>runlevel</command> prints the previous
|
|
and current SysV runlevel if they are known.</para>
|
|
|
|
<para>The two runlevel characters are separated by a
|
|
single space character. If a runlevel cannot be
|
|
determined, N is printed instead. If neither can be
|
|
determined, the word "unknown" is printed.</para>
|
|
|
|
<para>Unless overridden in the environment, this will
|
|
check the utmp database for recent runlevel
|
|
changes.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Options</title>
|
|
|
|
<para>The following option is understood:</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><option>--help</option></term>
|
|
|
|
<listitem><para>Prints a short help
|
|
text and exits.</para></listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Exit status</title>
|
|
|
|
<para>If one or both runlevels could be determined, 0
|
|
is returned, a non-zero failure code otherwise.</para>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Environment</title>
|
|
|
|
<variablelist class='environment-variables'>
|
|
<varlistentry>
|
|
<term><varname>$RUNLEVEL</varname></term>
|
|
|
|
<listitem><para>If
|
|
<varname>$RUNLEVEL</varname> is set,
|
|
<command>runlevel</command> will print
|
|
this value as current runlevel and
|
|
ignore utmp.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>$PREVLEVEL</varname></term>
|
|
|
|
<listitem><para>If
|
|
<varname>$PREVLEVEL</varname> is set
|
|
<command>runlevel</command> will print
|
|
this value as previous runlevel and
|
|
ignore utmp.</para></listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Files</title>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><filename>/var/run/utmp</filename></term>
|
|
|
|
<listitem><para>The utmp database
|
|
<command>runlevel</command> reads the
|
|
previous and current runlevel
|
|
from.</para></listitem>
|
|
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Notes</title>
|
|
|
|
<para>This is a legacy command available for compatibility
|
|
only. It should not be used anymore, as the concept of
|
|
runlevels is obsolete.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|