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BIO_s_null(3)                       OpenSSL                      BIO_s_null(3)



NAME
       BIO_s_null - null data sink

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/bio.h>

        const BIO_METHOD *BIO_s_null(void);

DESCRIPTION
       BIO_s_null() returns the null sink BIO method. Data written to the null
       sink is discarded, reads return EOF.

NOTES
       A null sink BIO behaves in a similar manner to the Unix /dev/null
       device.

       A null bio can be placed on the end of a chain to discard any data
       passed through it.

       A null sink is useful if, for example, an application wishes to digest
       some data by writing through a digest bio but not send the digested
       data anywhere.  Since a BIO chain must normally include a source/sink
       BIO this can be achieved by adding a null sink BIO to the end of the
       chain

RETURN VALUES
       BIO_s_null() returns the null sink BIO method.

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>.



3.0.12                            2023-05-07                     BIO_s_null(3)