openssl-prebuild/linux_amd64/share/doc/openssl/html/man3/BIO_printf.html
2020-03-02 17:19:21 +00:00

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<title>BIO_printf</title>
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<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><a name="name">NAME</a></h1>
<p>BIO_printf, BIO_vprintf, BIO_snprintf, BIO_vsnprintf
- formatted output to a BIO</p>
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<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
#include &lt;openssl/bio.h&gt;</pre>
<pre>
int BIO_printf(BIO *bio, const char *format, ...)
int BIO_vprintf(BIO *bio, const char *format, va_list args)</pre>
<pre>
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)</pre>
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<h1><a name="description">DESCRIPTION</a></h1>
<p><code>BIO_printf()</code> is similar to the standard C <code>printf()</code> function, except that
the output is sent to the specified BIO, <strong>bio</strong>, rather than standard
output. All common format specifiers are supported.</p>
<p><code>BIO_vprintf()</code> is similar to the <code>vprintf()</code> function found on many platforms,
the output is sent to the specified BIO, <strong>bio</strong>, rather than standard
output. All common format specifiers are supported. The argument
list <strong>args</strong> is a stdarg argument list.</p>
<p><code>BIO_snprintf()</code> is for platforms that do not have the common <code>snprintf()</code>
function. It is like <code>sprintf()</code> except that the size parameter, <strong>n</strong>,
specifies the size of the output buffer.</p>
<p><code>BIO_vsnprintf()</code> is to <code>BIO_snprintf()</code> as <code>BIO_vprintf()</code> is to <code>BIO_printf()</code>.</p>
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<h1><a name="return_values">RETURN VALUES</a></h1>
<p>All functions return the number of bytes written, or -1 on error.
For <code>BIO_snprintf()</code> and <code>BIO_vsnprintf()</code> this includes when the output
buffer is too small.</p>
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<h1><a name="copyright">COPYRIGHT</a></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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