1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>strncpy</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux Kernel API"><link rel="up" href="ch02s02.html" title="String Manipulation"><link rel="prev" href="API-strcpy.html" title="strcpy"><link rel="next" href="API-strlcpy.html" title="strlcpy"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">strncpy</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-strcpy.html">Prev</a>&#160;</td><th width="60%" align="center">String Manipulation</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-strlcpy.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-strncpy"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>strncpy &#8212; 
2     Copy a length-limited, C-string
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">char * <b class="fsfunc">strncpy </b>(</code></td><td>char * <var class="pdparam">dest</var>, </td></tr><tr><td>&#160;</td><td>const char * <var class="pdparam">src</var>, </td></tr><tr><td>&#160;</td><td>size_t <var class="pdparam">count</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1122817436"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>dest</code></em></span></dt><dd><p>
4     Where to copy the string to
5    </p></dd><dt><span class="term"><em class="parameter"><code>src</code></em></span></dt><dd><p>
6     Where to copy the string from
7    </p></dd><dt><span class="term"><em class="parameter"><code>count</code></em></span></dt><dd><p>
8     The maximum number of bytes to copy
9    </p></dd></dl></div></div><div class="refsect1"><a name="idp1122821020"></a><h2>Description</h2><p>
10   The result is not <code class="constant">NUL-terminated</code> if the source exceeds
11   <em class="parameter"><code>count</code></em> bytes.
12   </p><p>
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14   In the case where the length of <em class="parameter"><code>src</code></em> is less than  that  of
15   count, the remainder of <em class="parameter"><code>dest</code></em> will be padded with <code class="constant">NUL</code>.
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