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Title "BIO_GET_DATA 3"
BIO_GET_DATA 3 "2023-02-07" "1.1.1t" "OpenSSL"
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"NAME"
BIO_set_data, BIO_get_data, BIO_set_init, BIO_get_init, BIO_set_shutdown, BIO_get_shutdown - functions for managing BIO state information
"SYNOPSIS"
Header "SYNOPSIS" .Vb 1 #include <openssl/bio.h> \& void BIO_set_data(BIO *a, void *ptr); void *BIO_get_data(BIO *a); void BIO_set_init(BIO *a, int init); int BIO_get_init(BIO *a); void BIO_set_shutdown(BIO *a, int shut); int BIO_get_shutdown(BIO *a); .Ve
"DESCRIPTION"
Header "DESCRIPTION" These functions are mainly useful when implementing a custom \s-1BIO.\s0

The BIO_set_data() function associates the custom data pointed to by ptr with the \s-1BIO.\s0 This data can subsequently be retrieved via a call to BIO_get_data(). This can be used by custom BIOs for storing implementation specific information.

The BIO_set_init() function sets the value of the \s-1BIO\s0's \*(L"init\*(R" flag to indicate whether initialisation has been completed for this \s-1BIO\s0 or not. A nonzero value indicates that initialisation is complete, whilst zero indicates that it is not. Often initialisation will complete during initial construction of the \s-1BIO.\s0 For some BIOs however, initialisation may not complete until after additional steps have occurred (for example through calling custom ctrls). The BIO_get_init() function returns the value of the \*(L"init\*(R" flag.

The BIO_set_shutdown() and BIO_get_shutdown() functions set and get the state of this \s-1BIO\s0's shutdown (i.e. \s-1BIO_CLOSE\s0) flag. If set then the underlying resource is also closed when the \s-1BIO\s0 is freed.

"RETURN VALUES"
Header "RETURN VALUES" \fBBIO_get_data() returns a pointer to the implementation specific custom data associated with this \s-1BIO,\s0 or \s-1NULL\s0 if none has been set.

\fBBIO_get_init() returns the state of the \s-1BIO\s0's init flag.

\fBBIO_get_shutdown() returns the stat of the \s-1BIO\s0's shutdown (i.e. \s-1BIO_CLOSE\s0) flag.

"SEE ALSO"
Header "SEE ALSO" bio, BIO_meth_new
"HISTORY"
Header "HISTORY" The functions described here were added in OpenSSL 1.1.0.
"COPYRIGHT"
Header "COPYRIGHT" Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.