File: gethostbyaddr.c

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#include <netdb.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

int main() {
  struct in_addr bar;
  struct hostent *foo;
  inet_aton("160.45.10.8",&bar);
  foo=gethostbyaddr(&bar,4,AF_INET);
  if (foo) {
    int i;
    for (i=0; foo->h_addr_list[i]; ++i)
      printf("%s -> %s\n",foo->h_name,inet_ntoa(*(struct in_addr*)foo->h_addr_list[i]));
    for (i=0; foo->h_aliases[i]; ++i)
      printf("  also known as %s\n",foo->h_aliases[i]);
  }
  return 0;
}