1BIO_new(3)                          OpenSSL                         BIO_new(3)
2
3
4

NAME

6       BIO_new, BIO_set, BIO_free, BIO_vfree, BIO_free_all - BIO allocation
7       and freeing functions
8

SYNOPSIS

10        #include <openssl/bio.h>
11
12        BIO *  BIO_new(BIO_METHOD *type);
13        int    BIO_set(BIO *a,BIO_METHOD *type);
14        int    BIO_free(BIO *a);
15        void   BIO_vfree(BIO *a);
16        void   BIO_free_all(BIO *a);
17

DESCRIPTION

19       The BIO_new() function returns a new BIO using method type.
20
21       BIO_set() sets the method of an already existing BIO.
22
23       BIO_free() frees up a single BIO, BIO_vfree() also frees up a single
24       BIO but it does not return a value. Calling BIO_free() may also have
25       some effect on the underlying I/O structure, for example it may close
26       the file being referred to under certain circumstances. For more
27       details see the individual BIO_METHOD descriptions.
28
29       BIO_free_all() frees up an entire BIO chain, it does not halt if an
30       error occurs freeing up an individual BIO in the chain.
31

RETURN VALUES

33       BIO_new() returns a newly created BIO or NULL if the call fails.
34
35       BIO_set(), BIO_free() return 1 for success and 0 for failure.
36
37       BIO_free_all() and BIO_vfree() do not return values.
38

NOTES

40       Some BIOs (such as memory BIOs) can be used immediately after calling
41       BIO_new(). Others (such as file BIOs) need some additional
42       initialization, and frequently a utility function exists to create and
43       initialize such BIOs.
44
45       If BIO_free() is called on a BIO chain it will only free one BIO
46       resulting in a memory leak.
47
48       Calling BIO_free_all() a single BIO has the same effect as calling
49       BIO_free() on it other than the discarded return value.
50
51       Normally the type argument is supplied by a function which returns a
52       pointer to a BIO_METHOD. There is a naming convention for such
53       functions: a source/sink BIO is normally called BIO_s_*() and a filter
54       BIO BIO_f_*();
55

EXAMPLE

57       Create a memory BIO:
58
59        BIO *mem = BIO_new(BIO_s_mem());
60

SEE ALSO

62       TBA
63
64
65
661.0.2o                            2020-01-28                        BIO_new(3)
Impressum