BIO_printf.3

.\"	$OpenBSD: BIO_printf.3,v 1.4 2024/03/02 09:18:28 tb Exp $
.\"	OpenSSL 2ca2e917 Mon Mar 20 16:25:22 2017 -0400
.\"
.\" Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
.\"
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.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
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.Dd $Mdocdate: March 2 2024 $
.Dt BIO_PRINTF 3
.Os
.Sh NAME
.Nm BIO_printf
.Nd formatted output to a BIO
.Sh SYNOPSIS
.In openssl/bio.h
.Ft int
.Fo BIO_printf
.Fa "BIO *bio"
.Fa "const char *format"
.Fa ...
.Fc
.Sh DESCRIPTION
.Fn BIO_printf
is a wrapper around
.Xr vfprintf 3 ,
sending the output to the specified
.Fa bio .
.Sh RETURN VALUES
These functions return the number of bytes written,
or -1 if an error occurs.
.Sh SEE ALSO
.Xr BIO_new 3
.Sh HISTORY
.Fn BIO_printf
first appeared in SSLeay 0.6.5 and has been available since
.Ox 2.4 .