/usr/man/cat.3/BIO_free.3(/usr/man/cat.3/BIO_free.3)

BIO_new(3)                   OpenSSL                   BIO_new(3)

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.

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.

1.0.2t               Last change: 2019-09-10                    1

BIO_new(3)                   OpenSSL                   BIO_new(3)

     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_*();

EXAMPLE

     Create a memory BIO:

      BIO *mem = BIO_new(BIO_s_mem());

SEE ALSO

     TBA

1.0.2t               Last change: 2019-09-10                    2

See also BIO_free_all(3)
See also BIO_new(3)
See also BIO_set(3)
See also BIO_vfree(3)