BIO_PRINTF(3) Library Functions Manual BIO_PRINTF(3) NAME BIO_printf - formatted output to a BIO SYNOPSIS #include 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. Linux 6.8.2-arch2-1 March 2, 2024 Linux 6.8.2-arch2-1