BIO_new - BIO allocation and freeing functions
#include <openssl/bio.h> BIO * BIO_new(BIO_METHOD *type); int BIO_set(BIO *a,BIO_METHOD *type); int BIO_free(BIO *a); void BIO_vfree(BIO *a); void BIO_free_all(BIO *a);
BIO_new(3openssl) OpenSSL BIO_new(3openssl)
NAME
BIO_new, BIO_set, BIO_free, BIO_vfree, BIO_free_all - BIO allocation
and freeing functions
SYNOPSIS
#include <openssl/bio.h>
BIO * BIO_new(BIO_METHOD *type);
int BIO_set(BIO *a,BIO_METHOD *type);
int BIO_free(BIO *a);
void BIO_vfree(BIO *a);
void BIO_free_all(BIO *a);
DESCRIPTION
The BIO_new() function returns a new BIO using method type.
BIO_set() sets the method of an already existing BIO.
BIO_free() frees up a single BIO, BIO_vfree() also frees up a single
BIO but it does not return a value. 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.
RETURN VALUES
BIO_new() returns a newly created BIO or NULL if the call fails.
BIO_set(), BIO_free() return 1 for success and 0 for failure.
BIO_free_all() and BIO_vfree() do not return values.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+--------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------------+
|Availability | library/security/openssl |
+---------------+--------------------------+
|Stability | Pass-through uncommitted |
+---------------+--------------------------+
NOTES
Some BIOs (such as memory BIOs) can be used immediately after calling
BIO_new(). Others (such as file BIOs) need some additional
initialization, and frequently a utility function exists to create and
initialize such BIOs.
If BIO_free() is called on a BIO chain it will only free one BIO
resulting in a memory leak.
Calling BIO_free_all() a single BIO has the same effect as calling
BIO_free() on it other than the discarded return value.
Normally the type argument is supplied by a function which returns a
pointer to a BIO_METHOD. There is a naming convention for such
functions: a source/sink BIO is normally called BIO_s_*() and a filter
BIO BIO_f_*();
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from
https://www.openssl.org/source/openssl-1.0.2ze.tar.gz.
Further information about this software can be found on the open source
community website at https://www.openssl.org/.
EXAMPLE
Create a memory BIO:
BIO *mem = BIO_new(BIO_s_mem());
SEE ALSO
TBA
1.0.2ze 2022-05-03 BIO_new(3openssl)