tprintf_open
sc->sc_tpr = tprintf_open(l->l_proc);
sc->sc_ttyp = tprintf_open(l->l_proc);
sc->sc_tpr = tprintf_open(l->l_proc);
sc->sc_ttyp = tprintf_open(l->l_proc);
tpr = tprintf_open(l->l_proc);
tpr_t tprintf_open(struct proc *);