BSD 4_3 release

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

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/

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

#ifndef lint
static char sccsid[] = "@(#)hostid.c    5.4 (Berkeley) 5/19/86";
#endif not lint

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

extern  char *index();
extern  unsigned long inet_addr();
extern  long gethostid();

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

       if (argc < 2) {
               printf("%#x\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, "%x", &hostid) != 1) {
usage:
                       fprintf(stderr,
                           "usage: %s [hexnum or internet address]\n",
                           argv[0]);
                       exit(1);
               }
       }

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

       exit(0);
}