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| | #define _GNU_SOURCE
#include <sys/socket.h>
#include <netdb.h>
#include <errno.h>
#include <stdlib.h>
struct hostent *gethostbyname2(const char *name, int af)
{
static struct hostent *h;
size_t size = 63;
struct hostent *res;
int err;
do {
free(h);
h = malloc(size+=size+1);
if (!h) {
h_errno = NO_RECOVERY;
return 0;
}
err = gethostbyname2_r(name, af, h,
(void *)(h+1), size-sizeof *h, &res, &h_errno);
} while (err == ERANGE);
return err ? 0 : h;
}
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