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/*
* Resolve domain.
*
* Copyright (C) 2014 Tomasz Kramkowski <tk@the-tk.com>
*
* This program is free software. It is licensed under version 3 of the
* GNU General Public License.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see [http://www.gnu.org/licenses/].
*/
// I once spent 3 hours trying to manually do this by sending DNS name
// resolution requests.
#include <stdio.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
if (argc != 2) {
fprintf(stderr, "Usage: %s <domain-name>\n", argv[0]);
exit(1);
}
struct hostent* he;
he = gethostbyname(argv[1]);
if (!he) {
fputs("Error, could not resolve.\n", stderr);
exit(1);
}
char str[INET_ADDRSTRLEN];
inet_ntop(AF_INET, he->h_addr, str, INET_ADDRSTRLEN);
printf("%s\n", str);
return 0;
}
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