The TI-RPC library functions interface with either portmap or rpcbind. Since the services of the programs differ, there are two sets of functions, one for each service.
The following functions work with portmap:
pmap_set pmap_unset pmap_getport pmap_getmaps pmap_rmtcall
The following functions work with rpcbind:
rpcb_set rpcb_unset rpcb_getaddr rpcb_getmaps rpcb_rmtcall