<?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="sd_booted" xmlns:xi="http://www.w3.org/2001/XInclude"> <refentryinfo> <title>sd_booted</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>sd_booted</refentrytitle> <manvolnum>3</manvolnum> </refmeta> <refnamediv> <refname>sd_booted</refname> <refpurpose>Test whether the system is running the systemd init system</refpurpose> </refnamediv> <refsynopsisdiv> <funcsynopsis> <funcsynopsisinfo>#include <systemd/sd-daemon.h></funcsynopsisinfo> <funcprototype> <funcdef>int <function>sd_booted</function></funcdef> <paramdef>void</paramdef> </funcprototype> </funcsynopsis> </refsynopsisdiv> <refsect1> <title>Description</title> <para><function>sd_booted()</function> checks whether the system was booted up using the systemd init system.</para> </refsect1> <refsect1> <title>Return Value</title> <para>On failure, this call returns a negative errno-style error code. If the system was booted up with systemd as init system, this call returns a positive return value, zero otherwise.</para> </refsect1> <refsect1> <title>Notes</title> <xi:include href="libsystemd-pkgconfig.xml" xpointer="pkgconfig-text"/> <para>Internally, this function checks whether the directory <filename>/run/systemd/system/</filename> exists. A simple check like this can also be implemented trivially in shell or any other language.</para> </refsect1> <refsect1> <title>See Also</title> <para> <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry> </para> </refsect1> </refentry>