man/sd_booted.xml

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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 the system
  65     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 errno-style error
  72     code. If the system was booted up with systemd as init system,
  73     this call returns a positive return value, zero otherwise.</para>
  74   </refsect1>
  75
  76   <refsect1>
  77     <title>Notes</title>
  78
  79     <xi:include href="libsystemd-pkgconfig.xml" xpointer="pkgconfig-text"/>
  80
  81     <para>Internally, this function checks whether the directory
  82     <filename>/run/systemd/system/</filename> exists. A simple check
  83     like this can also be implemented trivially in shell or any other
  84     language.</para>
  85   </refsect1>
  86
  87   <refsect1>
  88     <title>See Also</title>
  89     <para>
  90       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  91       <citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry>
  92     </para>
  93   </refsect1>
  94
  95 </refentry>