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 OpenSSL license (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>.