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
   5 <!--
   6   This file is part of systemd.
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   8   Copyright 2010 Lennart Poettering
   9
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  23
  24 <refentry id="sd_booted">
  25
  26         <refentryinfo>
  27                 <title>sd_booted</title>
  28                 <productname>systemd</productname>
  29
  30                 <authorgroup>
  31                         <author>
  32                                 <contrib>Developer</contrib>
  33                                 <firstname>Lennart</firstname>
  34                                 <surname>Poettering</surname>
  35                                 <email>lennart@poettering.net</email>
  36                         </author>
  37                 </authorgroup>
  38         </refentryinfo>
  39
  40         <refmeta>
  41                 <refentrytitle>sd_booted</refentrytitle>
  42                 <manvolnum>3</manvolnum>
  43         </refmeta>
  44
  45         <refnamediv>
  46                 <refname>sd_booted</refname>
  47                 <refpurpose>Test whether the system is running the systemd init system</refpurpose>
  48         </refnamediv>
  49
  50         <refsynopsisdiv>
  51                 <funcsynopsis>
  52                         <funcsynopsisinfo>#include &lt;systemd/sd-daemon.h&gt;</funcsynopsisinfo>
  53
  54                         <funcprototype>
  55                                 <funcdef>int <function>sd_booted</function></funcdef>
  56                                 <paramdef>void</paramdef>
  57                         </funcprototype>
  58                 </funcsynopsis>
  59         </refsynopsisdiv>
  60
  61         <refsect1>
  62                 <title>Description</title>
  63                 <para><function>sd_booted()</function> checks whether
  64                 the system was booted up using the systemd init system.</para>
  65         </refsect1>
  66
  67         <refsect1>
  68                 <title>Return Value</title>
  69
  70                 <para>On failure, this call returns a negative
  71                 errno-style error code. If the system was booted up
  72                 with systemd as init system, this call returns a
  73                 positive return value, zero otherwise.</para>
  74         </refsect1>
  75
  76         <refsect1>
  77                 <title>Notes</title>
  78
  79                 <para>These APIs are implemented as a shared library,
  80                 which can be compiled and linked to with the
  81                 <constant>libsystemd</constant> <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  82                 file.</para>
  83
  84                 <para>Internally, this function checks whether the
  85                 directory <filename>/run/systemd/system/</filename>
  86                 exists. A simple check like this can also be
  87                 implemented trivially in shell or any other
  88                 language.</para>
  89
  90         </refsect1>
  91
  92         <refsect1>
  93                 <title>See Also</title>
  94                 <para>
  95                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  96                         <citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry>
  97                 </para>
  98         </refsect1>
  99
 100 </refentry>