/*
         *      gethostid 
         *
         *      This example has a combination of high-level
         *      (SVR4) and (SI_HW_SERIAL) feature declarations.
         */
        
        #if defined(SVR4) && defined(SI_HW_SERIAL)
        long  gethostid() {
                        
          char buf[128];
                
          if (sysinfo(SI_HW_SERIAL, buf, 128) == -1) {
            perror("sysinfo");
            exit(1);
          }
          return(strtoul(buf,NULL,0));
        }
        #endif /* SVR4 && SI_HW_SERIAL */