NAME

       BIO_s_null - null data sink

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>.