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137 .IX Title "BIO_s_null 3"
138 .TH BIO_s_null 3 "2009-07-19" "1.0.1n" "OpenSSL"
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144 BIO_s_null \- null data sink
148 .IX Header "SYNOPSIS"
150 \& #include <openssl/bio.h>
152 \& BIO_METHOD * BIO_s_null(void);
155 .IX Header "DESCRIPTION"
156 \&\fIBIO_s_null()\fR returns the null sink \s-1BIO\s0 method. Data written to
157 the null sink is discarded, reads return \s-1EOF.\s0
160 A null sink \s-1BIO\s0 behaves in a similar manner to the Unix /dev/null
163 A null bio can be placed on the end of a chain to discard any data
166 A null sink is useful if, for example, an application wishes to digest some
167 data by writing through a digest bio but not send the digested data anywhere.
168 Since a \s-1BIO\s0 chain must normally include a source/sink \s-1BIO\s0 this can be achieved
169 by adding a null sink \s-1BIO\s0 to the end of the chain
171 .IX Header "RETURN VALUES"
172 \&\fIBIO_s_null()\fR returns the null sink \s-1BIO\s0 method.
174 .IX Header "SEE ALSO"