#define _GNU_SOURCE
#include <netdb.h>

struct servent* getservbyport(int port, const char* prots) {
  static struct servent se;
  static long buf[32 / sizeof(long)];
  struct servent* res;
  if (getservbyport_r(port, prots, &se, (void*)buf, sizeof buf, &res))
    return 0;
  return &se;
}