Obtains a unique systemwide procedure identification number.
    Format
      #include  <rpc/rpc.h>
      int  registerrpc(u_long prognum, u_long versnum, u_long
           procnum, char *(*progname)(), xdrproc_t inproc, xdrproc_t
           outproc );

1  –  Arguments

 prognum
    The program number associated with the service procedure.
 versnum
    The version number associated with the service procedure.
 procnum
    The procedure number associated with the service procedure.
 progname
    The address of the service procedure being registered with the
    ONC RPC service package.
 inproc
    The XDR routine used to decode the service procedure's arguments.
 outproc
    The XDR routine used to encode the service procedure's results.

2  –  Description

    The registerrpc routine performs the following tasks for a
    server:
    o  Creates a UDP server handle. See the svcudp_create routine for
       restrictions.
    o  Calls the svc_register routine to register the program with
       the Portmapper.
    o  Adds prognum, versnum, and procnum to an internal list of
       registered procedures. When the server receives a request, it
       uses this list to determine which routine to call.

    A server should call registerrpc for every procedure it
    implements, except for the NULL procedure. If a request arrives
    for program prognum, version versnum, and procedure procnum,
    progname is called with a pointer to its parameters.

3  –  Return Values

    0                  Indicates success.
    -1                 Indicates failure.