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       comedi_fileno - integer descriptor of Comedilib device


       #include <comedilib.h>

       int comedi_fileno (comedi_t * device);


       The  function  comedi_fileno  returns  the  integer  descriptor for the
       device dev.  This descriptor can then be used as  the  file  descriptor
       parameter  of read(), write(), etc.  This function is intended to mimic
       the standard C  library  function  fileno().   If  dev  is  an  invalid
       comedi_t  pointer,  the  function  returns  -1 and sets the appropriate
       Comedilib error value.

                                28 October 2007