Manual Pages for UNIX Operating System command usage for man BIO_set

OpenSSL                                         BIO_new(3openssl)



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

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      #include 

      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);


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     The BIO_new() function returns a new BIO using method ttttyyyyppppeeee.

     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.

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     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.

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     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.




16/Sep/2000            Last change: 0.9.8o                      1






OpenSSL                                         BIO_new(3openssl)



     Normally the ttttyyyyppppeeee 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_*();

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     Create a memory BIO:

      BIO *mem = BIO_new(BIO_s_mem());


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     TBA










































16/Sep/2000            Last change: 0.9.8o                      2