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#define _GNU_SOURCE
#include <netdb.h>
#include <errno.h>
#include <stdlib.h>
struct hostent *gethostbyaddr(const void *a, socklen_t l, 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 = gethostbyaddr_r(a, l, af, h,
(void *)(h+1), size-sizeof *h, &res, &h_errno);
} while (err == ERANGE);
return res;
}
#ifdef TEST
int
main(void) {
return 0;
}
#endif
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