man/sd_machine_get_class.xml

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  23
  24 <refentry id="sd_machine_get_class">
  25
  26   <refentryinfo>
  27     <title>sd_machine_get_class</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_machine_get_class</refentrytitle>
  42     <manvolnum>3</manvolnum>
  43   </refmeta>
  44
  45   <refnamediv>
  46     <refname>sd_machine_get_class</refname>
  47     <refname>sd_machine_get_ifindices</refname>
  48     <refpurpose>Determine the class and network interface indices of a
  49     locally running virtual machine or container.</refpurpose>
  50   </refnamediv>
  51
  52   <refsynopsisdiv>
  53     <funcsynopsis>
  54       <funcsynopsisinfo>#include &lt;systemd/sd-login.h&gt;</funcsynopsisinfo>
  55
  56       <funcprototype>
  57         <funcdef>int <function>sd_machine_get_class</function></funcdef>
  58         <paramdef>const char* <parameter>machine</parameter></paramdef>
  59         <paramdef>char *<parameter>class</parameter></paramdef>
  60       </funcprototype>
  61
  62       <funcprototype>
  63         <funcdef>int <function>sd_machine_get_ifindices</function></funcdef>
  64         <paramdef>const char* <parameter>machine</parameter></paramdef>
  65         <paramdef>int **<parameter>ifindices</parameter></paramdef>
  66       </funcprototype>
  67     </funcsynopsis>
  68   </refsynopsisdiv>
  69
  70   <refsect1>
  71     <title>Description</title>
  72
  73     <para><function>sd_machine_get_class()</function> may be used to
  74     determine the class of a locally running virtual machine or
  75     container that is registered with
  76     <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
  77     The string returned is either <literal>vm</literal> or
  78     <literal>container</literal>. The returned string needs to be
  79     freed with the libc <citerefentry
  80     project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
  81     call after use.</para>
  82
  83     <para><function>sd_machine_get_ifindices()</function> may be used
  84     to determine the numeric indices of the network interfaces on the
  85     host that are pointing towards the specified locally running
  86     virtual machine or container that is registered with
  87     <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
  88     The returned array needs to be freed with the libc <citerefentry
  89     project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
  90     call after use.</para>
  91   </refsect1>
  92
  93   <refsect1>
  94     <title>Return Value</title>
  95
  96     <para>On success, these calls return 0 or a positive integer. On
  97     failure, these calls return a negative errno-style error
  98     code.</para>
  99   </refsect1>
 100
 101   <refsect1>
 102     <title>Notes</title>
 103
 104     <para>The <function>sd_machine_get_class()</function> and
 105     <function>sd_machine_get_ifindices()</function> interfaces are
 106     available as a shared library, which can be compiled and linked to
 107     with the
 108     <constant>libsystemd</constant> <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
 109     file.</para>
 110   </refsect1>
 111
 112   <refsect1>
 113     <title>See Also</title>
 114
 115     <para>
 116       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 117       <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
 118       <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 119       <citerefentry><refentrytitle>sd_pid_get_machine_name</refentrytitle><manvolnum>3</manvolnum></citerefentry>
 120     </para>
 121   </refsect1>
 122
 123 </refentry>