getservbyport_r
int getservbyport_r(int, const char *, struct servent *,
r = getservbyport_r(port, proto, &s, &sd);
r = getservbyport_r(port, (as->as.ni.flags & NI_DGRAM) ?
PROTO_NORMAL(getservbyport_r);
DEF_WEAK(getservbyport_r);
if (getservbyport_r(port, proto, &serv, &_servent_data) != 0)
r = getservbyport_r(htons(520), NULL, &servent, &servent_data);
r = getservbyport_r(htons(50000), NULL, &servent, &servent_data);
r = getservbyport_r(htons(520), "tcp", &servent, &servent_data);