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<a name="stpncpy_002d_002d_002dcounted-copy-string-returning-a-pointer-to-its-end"></a>
<h3 class="section">5.17 <code>stpncpy</code>&mdash;counted copy string returning a pointer to its end</h3>
<a name="index-stpncpy"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;string.h&gt;
char *stpncpy(char *restrict <var>dst</var>, const char *restrict <var>src</var>,
    size_t <var>length</var>);

</pre></div>
<p><strong>Description</strong><br>
<code>stpncpy</code> copies not more than <var>length</var> characters from the
the string pointed to by <var>src</var> (including the terminating
null character) to the array pointed to by <var>dst</var>.  If the
string pointed to by <var>src</var> is shorter than <var>length</var>
characters, null characters are appended to the destination
array until a total of <var>length</var> characters have been
written.
</p>
<br>
<p><strong>Returns</strong><br>
This function returns a pointer to the end of the destination string,
thus pointing to the trailing &rsquo;\0&rsquo;, or, if the destination string is
not null-terminated, pointing to dst + n.
</p>
<br>
<p><strong>Portability</strong><br>
<code>stpncpy</code> is a GNU extension, candidate for inclusion into POSIX/SUSv4.
</p>
<p><code>stpncpy</code> requires no supporting OS subroutines.
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