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<title>BIO_printf</title>
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<ul id="index">
  <li><a href="#NAME">NAME</a></li>
  <li><a href="#SYNOPSIS">SYNOPSIS</a></li>
  <li><a href="#DESCRIPTION">DESCRIPTION</a></li>
  <li><a href="#RETURN-VALUES">RETURN VALUES</a></li>
  <li><a href="#COPYRIGHT">COPYRIGHT</a></li>
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<h1 id="NAME">NAME</h1>

<p>BIO_printf, BIO_vprintf, BIO_snprintf, BIO_vsnprintf - formatted output to a BIO</p>

<h1 id="SYNOPSIS">SYNOPSIS</h1>

<pre><code> #include &lt;openssl/bio.h&gt;

 int BIO_printf(BIO *bio, const char *format, ...)
 int BIO_vprintf(BIO *bio, const char *format, va_list args)

 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)</code></pre>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>BIO_printf() is similar to the standard C printf() function, except that the output is sent to the specified BIO, <b>bio</b>, rather than standard output. All common format specifiers are supported.</p>

<p>BIO_vprintf() is similar to the vprintf() function found on many platforms, the output is sent to the specified BIO, <b>bio</b>, rather than standard output. All common format specifiers are supported. The argument list <b>args</b> is a stdarg argument list.</p>

<p>BIO_snprintf() is for platforms that do not have the common snprintf() function. It is like sprintf() except that the size parameter, <b>n</b>, specifies the size of the output buffer.</p>

<p>BIO_vsnprintf() is to BIO_snprintf() as BIO_vprintf() is to BIO_printf().</p>

<h1 id="RETURN-VALUES">RETURN VALUES</h1>

<p>All functions return the number of bytes written, or -1 on error. For BIO_snprintf() and BIO_vsnprintf() this includes when the output buffer is too small.</p>

<h1 id="COPYRIGHT">COPYRIGHT</h1>

<p>Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.</p>

<p>Licensed under the OpenSSL license (the &quot;License&quot;). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>


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