date and time created 88/07/22 16:08:01 by bostic

[unix-history] / usr / src / old / hostid / hostid.c

/*
* Copyright (c) 1983, 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983, 1988 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)hostid.c    5.6 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <stdio.h>
#include <netdb.h>

main(argc, argv)
       int argc;
       char **argv;
{
       register char *id;
       struct hostent *hp;
       u_long addr, inet_addr();
       long hostid, gethostid();
       char *index();

       if (argc < 2) {
               printf("%#lx\n", gethostid());
               exit(0);
       }

       id = argv[1];
       if (hp = gethostbyname(id)) {
               bcopy(hp->h_addr, &addr, sizeof(addr));
               hostid = addr;
       } else if (index(id, '.')) {
               if ((hostid = inet_addr(id)) == -1)
                       goto usage;
       } else {
               if (id[0] == '0' && (id[1] == 'x' || id[1] == 'X'))
                       id += 2;
               if (sscanf(id, "%lx", &hostid) != 1) {
usage:                  fputs("usage: hostid [hexnum or internet address]\n",
                           stderr);
                       exit(1);
               }
       }

       if (sethostid(hostid) < 0) {
               perror("sethostid");
               exit(1);
       }

       exit(0);
}