Libcddb is a C library to access data on a CDDB server (freedb.org). It allows
you to:

   1. search the database for possible CD matches;
   2. retrieve detailed information about a specific CD;
   3. submit new CD entries to the database.

Libcddb supports both the custom CDDB protocol and tunnelling the query and read
operations over plain HTTP. It is also possible to use an HTTP proxy server. If
you want to speed things up, you can make use of the built-in caching facility
provided by the library. 

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yes.. yet another library.. both newlib and clib2 provided..