1=pod 2 3=head1 NAME 4 5BIO_s_null - null data sink 6 7=head1 SYNOPSIS 8 9 #include <openssl/bio.h> 10 11 BIO_METHOD * BIO_s_null(void); 12 13=head1 DESCRIPTION 14 15BIO_s_null() returns the null sink BIO method. Data written to 16the null sink is discarded, reads return EOF. 17 18=head1 NOTES 19 20A null sink BIO behaves in a similar manner to the Unix /dev/null 21device. 22 23A null bio can be placed on the end of a chain to discard any data 24passed through it. 25 26A null sink is useful if, for example, an application wishes to digest some 27data by writing through a digest bio but not send the digested data anywhere. 28Since a BIO chain must normally include a source/sink BIO this can be achieved 29by adding a null sink BIO to the end of the chain 30 31=head1 RETURN VALUES 32 33BIO_s_null() returns the null sink BIO method. 34 35=head1 SEE ALSO 36 37TBA 38