phase_name
printf("%s:\tphase=%s\n", ifname, phase_name(sp->defs.pp_phase));
const char *phase_name(enum ppp_phase phase);
const char *phase_name;
phase_name = "New Moon";
phase_name = "First Quarter";
phase_name = "Full Moon";
phase_name = "Last Quarter";
phase_name = NULL;
if (phase_name) {
snprintf(buf, sizeof(buf), "%s", phase_name);