man/sd_bus_label_escape.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">
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   8 Copyright 2014 Zbigniew Jędrzejewski-Szmek
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  23
  24 <refentry id="sd_bus_label_escape">
  25
  26   <refentryinfo>
  27     <title>sd_bus_label_escape</title>
  28     <productname>systemd</productname>
  29
  30     <authorgroup>
  31       <author>
  32         <contrib>A monkey with a typewriter</contrib>
  33         <firstname>Zbigniew</firstname>
  34         <surname>Jędrzejewski-Szmek</surname>
  35         <email>zbyszek@in.waw.pl</email>
  36       </author>
  37     </authorgroup>
  38   </refentryinfo>
  39
  40   <refmeta>
  41     <refentrytitle>sd_bus_label_escape</refentrytitle>
  42     <manvolnum>3</manvolnum>
  43   </refmeta>
  44
  45   <refnamediv>
  46     <refname>sd_bus_label_escape</refname>
  47     <refname>sd_bus_label_unescape</refname>
  48
  49     <refpurpose>Escape D-Bus object path special characters</refpurpose>
  50   </refnamediv>
  51
  52   <refsynopsisdiv>
  53     <funcsynopsis>
  54       <funcsynopsisinfo>#include &lt;systemd/sd-bus.h&gt;</funcsynopsisinfo>
  55
  56       <funcprototype>
  57         <funcdef>char* <function>sd_bus_label_escape</function></funcdef>
  58         <paramdef>const char* <parameter>s</parameter></paramdef>
  59       </funcprototype>
  60
  61       <funcprototype>
  62         <funcdef>char* <function>sd_bus_label_unescape</function></funcdef>
  63         <paramdef>const char* <parameter>f</parameter></paramdef>
  64       </funcprototype>
  65     </funcsynopsis>
  66   </refsynopsisdiv>
  67
  68   <refsect1>
  69     <title>Description</title>
  70
  71     <para><function>sd_bus_label_escape()</function> takes a
  72     <constant>NUL</constant>-terminated string as a argument. It will
  73     replace all characters which are invalid in a D-Bus object path by
  74     <literal>_</literal> and a hexadecimal number. As a special case,
  75     the empty string will be replaced by a lone <literal>_</literal>.
  76     <function>sd_bus_label_unescape()</function> can be used to
  77     reverse this process.</para>
  78   </refsect1>
  79
  80   <refsect1>
  81     <title>Return Value</title>
  82
  83     <para>On success, a new <constant>NUL</constant>-terminated string
  84     will be returned. It must be
  85     <citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>d
  86     by the caller. If a memory allocation failure occurs,
  87     <constant>NULL</constant> will be returned.
  88     </para>
  89   </refsect1>
  90
  91   <refsect1>
  92     <title>Notes</title>
  93
  94     <para><function>sd_bus_label_escape()</function> and
  95     <function>sd_bus_label_unescape()</function> are available as a
  96     shared library, which can be compiled and linked to with the
  97     <constant>libsystemd</constant> <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  98     file.</para>
  99   </refsect1>
 100
 101   <refsect1>
 102     <title>See Also</title>
 103
 104     <para>
 105       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 106       <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
 107       <citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
 108     </para>
 109   </refsect1>
 110
 111 </refentry>