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RedHat 9 (Linux i386) - man page for bio_s_null (redhat section 3)

BIO_s_null(3)							      OpenSSL							     BIO_s_null(3)

NAME
BIO_s_null - null data sink
SYNOPSIS
#include <openssl/bio.h> 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.
SEE ALSO
TBA 0.9.7a 2000-09-14 BIO_s_null(3)