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        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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SEE ALSO

34       TBA
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381.0.2o                            2019-09-10                     BIO_s_null(3)