<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
 lang="en" dir="ltr">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>
    strlcat    [C++ Reference]
  </title>

  <meta name="generator" content="DokuWiki Release 2009-12-25c &quot;Lemming&quot;" />
<meta name="robots" content="index,follow" />
<meta name="date" content="2009-01-28T08:05:58-0800" />
<meta name="keywords" content="c,string,strlcat" />
<link rel="search" type="application/opensearchdescription+xml" href="/wiki/lib/exe/opensearch.php" title="C++ Reference" />
<link rel="start" href="/wiki/" />
<link rel="contents" href="/wiki/c/string/strlcat?do=index" title="Index" />
<link rel="alternate" type="application/rss+xml" title="Recent Changes" href="/wiki/feed.php" />
<link rel="alternate" type="application/rss+xml" title="Current Namespace" href="/wiki/feed.php?mode=list&amp;ns=c:string" />
<link rel="edit" title="Edit this page" href="/wiki/c/string/strlcat?do=edit" />
<link rel="alternate" type="text/html" title="Plain HTML" href="/wiki/_export/xhtml/c/string/strlcat" />
<link rel="alternate" type="text/plain" title="Wiki Markup" href="/wiki/_export/raw/c/string/strlcat" />
<link rel="canonical" href="http://www.cppreference.com/wiki/c/string/strlcat" />
<link rel="stylesheet" media="all" type="text/css" href="/wiki/lib/exe/css.php?s=all&amp;t=custom1&amp;tseed=1272971091" />
<link rel="stylesheet" media="screen" type="text/css" href="/wiki/lib/exe/css.php?t=custom1&amp;tseed=1272971091" />
<link rel="stylesheet" media="print" type="text/css" href="/wiki/lib/exe/css.php?s=print&amp;t=custom1&amp;tseed=1272971091" />
<script type="text/javascript" charset="utf-8" ><!--//--><![CDATA[//><!--
var NS='c:string';var JSINFO = {"id":"c:string:strlcat","namespace":"c:string"};
//--><!]]></script>
<script type="text/javascript" charset="utf-8" src="/wiki/lib/exe/js.php?tseed=1272971091" ></script>

  <link rel="shortcut icon" href="/wiki/lib/tpl/custom1/images/favicon.png" />

  </head>

<body>
<div class="dokuwiki">
  
  <div class="stylehead">

    <div class="breadcrumbs">
      <span class="bchead">You are here: </span><a href="../../start.html"  title="start">C++ Reference</a> &raquo; <a href="../../c/start.html"  title="c:start">The Standard C Library</a> &raquo; <a href="../../c/string/start.html"  title="c:string:start">Standard C String and Character</a> &raquo; <a href="../../c/string/strlcat.html"  title="c:string:strlcat">strlcat</a>    </div>
    
  </div>


  
  
  <div class="page">

    <script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-2828341-1";
urchinTracker();
</script>
    <!-- wikipage start -->
    


<h2><a name="strlcat" id="strlcat">strlcat</a></h2>
<div class="level2">

<p>
<strong>Warning:</strong> Non-standard function!
</p>

<p>
Syntax:
</p>
<pre class="c code c++" style="font-family:monospace;">    <span class="co2">#include &lt;string.h&gt;  // On BSD or compatible systems</span>
    size_t strlcat<span class="br0">&#40;</span> <span class="kw4">char</span> <span class="sy0">*</span>dst<span class="sy0">,</span> <span class="kw4">const</span> <span class="kw4">char</span> <span class="sy0">*</span>src<span class="sy0">,</span> size_t siz<span class="br0">&#41;</span><span class="sy0">;</span></pre>
<p>
An attempt of the BSD people to “fix” <a href="../../c/string/strncat.html" class="wikilink1" title="c:string:strncat">strncat</a>.  There is a reason this function is not in any <acronym title="International Organization for Standardization">ISO</acronym> standard.  It is not a clear improvement over <a href="../../c/string/strncat.html" class="wikilink1" title="c:string:strncat">strncat</a>, but rather an “overload” with different tradeoffs.
</p>

<p>
<strong>Original description:</strong>
</p>

<p>
Appends <code>src</code> to string <code>dst</code> of size <code>siz</code> (unlike <code>strncat</code>, <code>siz</code> is the full size of <code>dst</code>, not space left).<br/>
At most <code>siz-1</code> characters will be copied.<br/>
Always <code>NUL</code> terminates (unless <code>strlen(dst) &gt; siz</code>).<br/>
Returns <code>strlen(src) + MIN(siz, strlen(initial dst))</code><br/>
If <code>retval &gt;= siz</code>, truncation occurred.
</p>

</div>
<div class="level2">

<p>
Related Topics: <a href="../../c/string/memcpy.html" class="wikilink1" title="c:string:memcpy">memcpy</a>, <a href="../../c/string/strchr.html" class="wikilink1" title="c:string:strchr">strchr</a>, <a href="../../c/string/strncpy.html" class="wikilink1" title="c:string:strncpy">strncpy</a>, <a href="../../c/string/strncat.html" class="wikilink1" title="c:string:strncat">strncat</a>, <a href="../../c/string/strncmp.html" class="wikilink1" title="c:string:strncmp">strncmp</a>
</p>

<p>
Another related (but non-standard) function is <a href="../../c/string/strlcpy.html" class="wikilink1" title="c:string:strlcpy">strlcpy</a>.
</p>

</div>

    <!-- wikipage stop -->
  </div>

  <div class="clearer">&nbsp;</div>

  
  <div class="stylefoot">

    <div class="meta">
      <div class="user">
              </div>
      <!--
      <div class="doc">
        c/string/strlcat.txt &middot; Last modified: 01/28/2009 08:05 by 194.237.142.21      </div>
      -->
    </div>

   
    </div></div></body>
</html>