BIO_PRINTF(3ossl) OpenSSL BIO_PRINTF(3ossl)
NAME
BIO_printf, BIO_vprintf, BIO_snprintf, BIO_vsnprintf - formatted output
to a BIO
SYNOPSIS
#include <openssl/bio.h>
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);
DESCRIPTION
BIO_printf(3) is similar to the standard C printf() function, except
that the output is sent to the specified BIO, bio, rather than standard
output. All common format specifiers are supported.
BIO_vprintf() is similar to the vprintf() function found on many
platforms, the output is sent to the specified BIO, bio, rather than
standard output. All common format specifiers are supported. The
argument list args is a stdarg argument list.
BIO_snprintf() is for platforms that do not have the common snprintf()
function. It is like sprintf() except that the size parameter, n,
specifies the size of the output buffer.
BIO_vsnprintf() is to BIO_snprintf() as BIO_vprintf() is to
BIO_printf(3).
RETURN VALUES
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.
NOTES
Except when n is 0, both BIO_snprintf() and BIO_vsnprintf() always
terminate their output with '\0'. This includes cases where -1 is
returned, such as when there is insufficient space to output the whole
string.
COPYRIGHT
Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). 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
<https://www.openssl.org/source/license.html>.
3.3.2 2024-09-04 BIO_PRINTF(3ossl)
openssl 3.3.2 - Generated Sat Sep 7 06:57:09 CDT 2024