1BIO_S_NULL(3)                       OpenSSL                      BIO_S_NULL(3)
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NAME

6       BIO_s_null - null data sink
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SYNOPSIS

9        #include <openssl/bio.h>
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11        const BIO_METHOD *BIO_s_null(void);
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DESCRIPTION

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

18       A null sink BIO behaves in a similar manner to the Unix /dev/null
19       device.
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21       A null bio can be placed on the end of a chain to discard any data
22       passed through it.
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24       A null sink is useful if, for example, an application wishes to digest
25       some data by writing through a digest bio but not send the digested
26       data anywhere.  Since a BIO chain must normally include a source/sink
27       BIO this can be achieved by adding a null sink BIO to the end of the
28       chain
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RETURN VALUES

31       BIO_s_null() returns the null sink BIO method.
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34       Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
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36       Licensed under the OpenSSL license (the "License").  You may not use
37       this file except in compliance with the License.  You can obtain a copy
38       in the file LICENSE in the source distribution or at
39       <https://www.openssl.org/source/license.html>.
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431.1.1c                            2019-05-28                     BIO_S_NULL(3)
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