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Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

RedHat 9 (Linux i386) - man page for bio_new (redhat section 3)

BIO_new(3)							      OpenSSL								BIO_new(3)

BIO_new, BIO_set, BIO_free, BIO_vfree, BIO_free_all - 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);
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.
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.
Some BIOs (such as memory BIOs) can be used immediately after calling BIO_new(). Others (such as file BIOs) need some additional initial- ization, 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 func- tions: a source/sink BIO is normally called BIO_s_*() and a filter BIO BIO_f_*();
Create a memory BIO: BIO *mem = BIO_new(BIO_s_mem());
TBA 0.9.7a 2000-09-16 BIO_new(3)

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