getrpcport(3) -- Linux man page



getrpcport - get RPC port number  


int getrpcport(host, prognum, versnum, proto)
        char *host;
        int prognum, versnum, proto;


getrpcport() returns the port number for version versnum of the RPC program prognum running on host and using protocol proto. It returns 0 if it cannot contact the portmapper, or if prognum is not registered. If prognum is registered but not with version versnum, it will still return a port number (for some version of the program) indicating that the program is indeed registered. The version mismatch will be detected upon the first call to the service.