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##### struct timeval

The buffer of type `struct timeval` used by the File-I/O protocol is defined as follows:

         struct timeval {
             time_t tv_sec;  /* second */
             long   tv_usec; /* microsecond */
         };

The integral datatypes conform to the definitions given in the appropriate section (see Integral Datatypes, for details) so this structure is of size 8 bytes.