1 /*
2  * gethostbyname tester. compile with:
3  *
4  * cc -o gethostbyname gethostbyname.c (SunOS 4.x)
5  *
6  * cc -o gethostbyname gethostbyname.c -lnsl (SunOS 5.x)
7  *
8  * run as: gethostbyname hostname
9  *
10  * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
11  */
12#include <sys/types.h>
13#include <sys/socket.h>
14#include <netinet/in.h>
15#include <arpa/inet.h>
16#include <netdb.h>
17#include <stdio.h>
18
19main(argc, argv)
20int     argc;
21char  **argv;
22{
23    struct hostent *hp;
24
25    if (argc != 2) {
26	fprintf(stderr, "usage: %s hostname\n", argv[0]);
27	exit(1);
28    }
29    if (hp = gethostbyname(argv[1])) {
30	printf("Hostname:\t%s\n", hp->h_name);
31	printf("Aliases:\t");
32	while (hp->h_aliases[0])
33	    printf("%s ", *hp->h_aliases++);
34	printf("\n");
35	printf("Addresses:\t");
36	while (hp->h_addr_list[0])
37	    printf("%s ", inet_ntoa(*(struct in_addr *) * hp->h_addr_list++));
38	printf("\n");
39	exit(0);
40    } else {
41	fprintf(stderr, "host %s not found\n", argv[1]);
42	exit(1);
43    }
44}
45