libressl-BIO_printf - formatted output to a BIO

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BIO_PRINTF(3) Library Functions Manual BIO_PRINTF(3)

NAME

BIO_printf — formatted output to a BIO

SYNOPSIS

library “libcrypto” #include <openssl/bio.h>

int

BIO_printf(BIO *bio, const char *format, ...);

DESCRIPTION

BIO_printf() is a wrapper around vfprintf(3), sending the output to the specified bio.

RETURN VALUES

These functions return the number of bytes written, or -1 if an error occurs.

SEE ALSO

BIO_new(3)

HISTORY

BIO_printf() first appeared in SSLeay 0.6.5 and has been available since OpenBSD 2.4. GNU June 8, 2025 BIO_PRINTF(3)

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