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131 .IX Title "BIO_s_null 3"
132 .TH BIO_s_null 3 "2004-12-18" "0.9.7e" "OpenSSL"
134 BIO_s_null \- null data sink
136 .IX Header "SYNOPSIS"
138 \& #include <openssl/bio.h>
142 \& BIO_METHOD * BIO_s_null(void);
145 .IX Header "DESCRIPTION"
146 \&\fIBIO_s_null()\fR returns the null sink \s-1BIO\s0 method. Data written to
147 the null sink is discarded, reads return \s-1EOF\s0.
150 A null sink \s-1BIO\s0 behaves in a similar manner to the Unix /dev/null
153 A null bio can be placed on the end of a chain to discard any data
156 A null sink is useful if, for example, an application wishes to digest some
157 data by writing through a digest bio but not send the digested data anywhere.
158 Since a \s-1BIO\s0 chain must normally include a source/sink \s-1BIO\s0 this can be achieved
159 by adding a null sink \s-1BIO\s0 to the end of the chain
161 .IX Header "RETURN VALUES"
162 \&\fIBIO_s_null()\fR returns the null sink \s-1BIO\s0 method.
164 .IX Header "SEE ALSO"