man/sd_booted.xml

   1 <?xml version='1.0'?> <!--*-nxml-*-->
   2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
   3         "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
   4
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   6   This file is part of systemd.
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   8   Copyright 2010 Lennart Poettering
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  23
  24 <refentry id="sd_booted"
  25         xmlns:xi="http://www.w3.org/2001/XInclude">
  26
  27         <refentryinfo>
  28                 <title>sd_booted</title>
  29                 <productname>systemd</productname>
  30
  31                 <authorgroup>
  32                         <author>
  33                                 <contrib>Developer</contrib>
  34                                 <firstname>Lennart</firstname>
  35                                 <surname>Poettering</surname>
  36                                 <email>lennart@poettering.net</email>
  37                         </author>
  38                 </authorgroup>
  39         </refentryinfo>
  40
  41         <refmeta>
  42                 <refentrytitle>sd_booted</refentrytitle>
  43                 <manvolnum>3</manvolnum>
  44         </refmeta>
  45
  46         <refnamediv>
  47                 <refname>sd_booted</refname>
  48                 <refpurpose>Test whether the system is running the systemd init system</refpurpose>
  49         </refnamediv>
  50
  51         <refsynopsisdiv>
  52                 <funcsynopsis>
  53                         <funcsynopsisinfo>#include &lt;systemd/sd-daemon.h&gt;</funcsynopsisinfo>
  54
  55                         <funcprototype>
  56                                 <funcdef>int <function>sd_booted</function></funcdef>
  57                                 <paramdef>void</paramdef>
  58                         </funcprototype>
  59                 </funcsynopsis>
  60         </refsynopsisdiv>
  61
  62         <refsect1>
  63                 <title>Description</title>
  64                 <para><function>sd_booted()</function> checks whether
  65                 the system was booted up using the systemd init system.</para>
  66         </refsect1>
  67
  68         <refsect1>
  69                 <title>Return Value</title>
  70
  71                 <para>On failure, this call returns a negative
  72                 errno-style error code. If the system was booted up
  73                 with systemd as init system, this call returns a
  74                 positive return value, zero otherwise.</para>
  75         </refsect1>
  76
  77         <refsect1>
  78                 <title>Notes</title>
  79
  80                 <xi:include href="libsystemd-pkgconfig.xml" xpointer="pkgconfig-text"/>
  81
  82                 <para>Internally, this function checks whether the
  83                 directory <filename>/run/systemd/system/</filename>
  84                 exists. A simple check like this can also be
  85                 implemented trivially in shell or any other
  86                 language.</para>
  87         </refsect1>
  88
  89         <refsect1>
  90                 <title>See Also</title>
  91                 <para>
  92                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  93                         <citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry>
  94                 </para>
  95         </refsect1>
  96
  97 </refentry>