BIO_NEW - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL
NAMEBIO_new, BIO_up_ref, BIO_free, BIO_vfree, BIO_free_all ​− BIO allocation and freeing functions
SYNOPSIS​ #include <openssl/bio.h> ​ ​ BIO * BIO_new(const BIO_METHOD *type); ​ int BIO_up_ref(BIO *a); ​ int BIO_free(BIO *a); ​ void BIO_vfree(BIO *a); ​ void BIO_free_all(BIO *a);
DESCRIPTIONThe BIO_new() function returns a new BIO using method type. ​BIO_up_ref() increments the reference count associated with the BIO object. ​BIO_free() frees up a single BIO, BIO_vfree() also frees up a single BIO but it does not return a value. If a is NULL nothing is done. Calling BIO_free() may also have some effect on the underlying I/O structure, for example it may close the file being referred to under certain circumstances. For more details see the individual ​BIO_METHOD descriptions. ​BIO_free_all() frees up an entire BIO chain, it does not halt if an error occurs freeing up an individual BIO in the chain. If a is NULL nothing is done.
RETURN VALUES​BIO_new() returns a newly created BIO or NULL if the call fails. ​BIO_up_ref() and BIO_free() return 1 for success and 0 for failure. ​BIO_free_all() and BIO_vfree() do not return values.
NOTESIf BIO_free() is called on a BIO chain it will only free one BIO resulting in a memory leak. Calling BIO_free_all() on a single BIO has the same effect as calling BIO_free() on it other than the discarded return value.
HISTORY​BIO_set() was removed in OpenSSL 1.1.0 as BIO type is now opaque.
EXAMPLESCreate a memory BIO: ​ BIO *mem = BIO_new(BIO_s_mem());
COPYRIGHTCopyright 2000−2019 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the ‟License”). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. 0
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