buffer(3SSL)                                 OpenSSL                                 buffer(3SSL)



NAME
       BUF_MEM_new, BUF_MEM_new_ex, BUF_MEM_free, BUF_MEM_grow - simple character array structure

       BUF_strdup, BUF_strndup, BUF_memdup, BUF_strlcpy, BUF_strlcat - standard C library
       equivalents

SYNOPSIS
        #include <openssl/buffer.h>

        BUF_MEM *BUF_MEM_new(void);

        void   BUF_MEM_free(BUF_MEM *a);

        int    BUF_MEM_grow(BUF_MEM *str, int len);

        char *BUF_strdup(const char *str);

        char *BUF_strndup(const char *str, size_t siz);

        void *BUF_memdup(const void *data, size_t siz);

        size_t BUF_strlcpy(char *dst, const char *src, size_t size);

        size_t BUF_strlcat(char *dst, const char *src, size_t size);

DESCRIPTION
       The buffer library handles simple character arrays. Buffers are used for various purposes
       in the library, most notably memory BIOs.

       BUF_MEM_new() allocates a new buffer of zero size.

       BUF_MEM_free() frees up an already existing buffer. The data is zeroed before freeing up
       in case the buffer contains sensitive data.

       BUF_MEM_grow() changes the size of an already existing buffer to len. Any data already in
       the buffer is preserved if it increases in size.

       BUF_strdup(), BUF_strndup(), BUF_memdup(), BUF_strlcpy() and BUF_strlcat() are equivalents
       of the standard C library functions. The dup() functions use OPENSSL_malloc() underneath
       and so should be used in preference to the standard library for memory leak checking or
       replacing the malloc() function.

       Memory allocated from these functions should be freed up using the OPENSSL_free()
       function.

       BUF_strndup makes the explicit guarantee that it will never read past the first siz bytes
       of str.

RETURN VALUES
       BUF_MEM_new() returns the buffer or NULL on error.

       BUF_MEM_free() has no return value.

       BUF_MEM_grow() returns zero on error or the new size (i.e. len).

SEE ALSO
       bio(3)

HISTORY
       BUF_MEM_new(), BUF_MEM_free() and BUF_MEM_grow() are available in all versions of SSLeay
       and OpenSSL. BUF_strdup() was added in SSLeay 0.8.



1.0.1t                                      2016-05-03                               buffer(3SSL)