1 /*
2 * Copyright (c) 1983, 1988 Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms are permitted
6 * provided that the above copyright notice and this paragraph are
7 * duplicated in all such forms and that any documentation,
8 * advertising materials, and other materials related to such
9 * distribution and use acknowledge that the software was developed
10 * by the University of California, Berkeley. The name of the
11 * University may not be used to endorse or promote products derived
12 * from this software without specific prior written permission.
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
16 */
17
18 #ifndef lint
19 char copyright[] =
20 "@(#) Copyright (c) 1983, 1988 Regents of the University of California.\n\
21 All rights reserved.\n";
22 #endif /* not lint */
23
24 #ifndef lint
25 static char sccsid[] = "@(#)hostid.c 5.6 (Berkeley) 06/18/88";
26 #endif /* not lint */
27
28 #include <sys/types.h>
29 #include <stdio.h>
30 #include <netdb.h>
31
main(argc,argv)32 main(argc, argv)
33 int argc;
34 char **argv;
35 {
36 register char *id;
37 struct hostent *hp;
38 u_long addr, inet_addr();
39 long hostid, gethostid();
40 char *index();
41
42 if (argc < 2) {
43 printf("%#lx\n", gethostid());
44 exit(0);
45 }
46
47 id = argv[1];
48 if (hp = gethostbyname(id)) {
49 bcopy(hp->h_addr, &addr, sizeof(addr));
50 hostid = addr;
51 } else if (index(id, '.')) {
52 if ((hostid = inet_addr(id)) == -1)
53 goto usage;
54 } else {
55 if (id[0] == '0' && (id[1] == 'x' || id[1] == 'X'))
56 id += 2;
57 if (sscanf(id, "%lx", &hostid) != 1) {
58 usage: fputs("usage: hostid [hexnum or internet address]\n",
59 stderr);
60 exit(1);
61 }
62 }
63
64 if (sethostid(hostid) < 0) {
65 perror("sethostid");
66 exit(1);
67 }
68
69 exit(0);
70 }
71