BIO_F_NULL(3ossl)

✨ BIO_F_NULL — the null filter, aka the BIO that literally does nothing ✨

okay so bestie, this is the 3ossl manual page for BIO_f_null, and honestly? it's giving minimalist icon. let's get into it 💅

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🌸 NAME 🌸

BIO_f_null — the null filter

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🎀 SYNOPSIS 🎀

#include <openssl/bio.h>

const BIO_METHOD *BIO_f_null(void);

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🦋 DESCRIPTION 🦋

so BIO_f_null() returns the null filter BIO method. it's a filter BIO that does nothing. not "a little bit of something", not "vibes-based something" — genuinely, truly, absolutely nothing. main character energy of a nap 😴

every single request to a null filter BIO gets passed straight through to the next BIO in the chain. that means a BIO chain that contains a null filter BIO behaves exactly as though that BIO wasn't there at all. no cap. it's the invisible bestie of the BIO world 🫶

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💜 NOTES 💜

as may be apparent (and yeah, it is very apparent), a null filter BIO is not particularly useful. like… at all. it's the "no thoughts, head empty" of filter BIOs 🙈

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⭐ RETURN VALUES ⭐

BIO_f_null() returns the null filter BIO method. that's it. that's the return value. periodt 💅

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👑 COPYRIGHT 👑

Copyright 2000-2016 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>.

fr fr bestie, pls do not use this file except in compliance with the License. the license said so and we respect the license in this house 💖

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alright bestie, that's the whole page! this iconic little doc was brought to you by OpenSSL 3.5.0, dated 2026-09-25, and it's filed under BIO_F_NULL(3ossl) 🎀 stay slay, read your man pages, and remember: sometimes the most powerful thing you can do is nothing ✨🌈💜