1 #define _GNU_SOURCE 2 3 #include <sys/socket.h> 4 #include <netdb.h> 5 gethostbyname_r(const char * name,struct hostent * h,char * buf,size_t buflen,struct hostent ** res,int * err)6int gethostbyname_r(const char *name, 7 struct hostent *h, char *buf, size_t buflen, 8 struct hostent **res, int *err) 9 { 10 return gethostbyname2_r(name, AF_INET, h, buf, buflen, res, err); 11 } 12