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134 .IX Title "BIO_s_null 3"
135 .TH BIO_s_null 3 "2009-04-11" "0.9.8k" "OpenSSL"
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141 BIO_s_null \- null data sink
143 .IX Header "SYNOPSIS"
145 \& #include <openssl/bio.h>
147 \& BIO_METHOD * BIO_s_null(void);
150 .IX Header "DESCRIPTION"
151 \&\fIBIO_s_null()\fR returns the null sink \s-1BIO\s0 method. Data written to
152 the null sink is discarded, reads return \s-1EOF\s0.
155 A null sink \s-1BIO\s0 behaves in a similar manner to the Unix /dev/null
158 A null bio can be placed on the end of a chain to discard any data
161 A null sink is useful if, for example, an application wishes to digest some
162 data by writing through a digest bio but not send the digested data anywhere.
163 Since a \s-1BIO\s0 chain must normally include a source/sink \s-1BIO\s0 this can be achieved
164 by adding a null sink \s-1BIO\s0 to the end of the chain
166 .IX Header "RETURN VALUES"
167 \&\fIBIO_s_null()\fR returns the null sink \s-1BIO\s0 method.
169 .IX Header "SEE ALSO"