4.3BSD - /usr/src/bin/hostid.c

   1: /*
   2:  * Copyright (c) 1983 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: char copyright[] =
   9: "@(#) Copyright (c) 1983 Regents of the University of California.\n\
  10:  All rights reserved.\n";
  11: #endif not lint
  12: 
  13: #ifndef lint
  14: static char sccsid[] = "@(#)hostid.c	5.4 (Berkeley) 5/19/86";
  15: #endif not lint
  16: 
  17: #include <sys/types.h>
  18: #include <stdio.h>
  19: #include <ctype.h>
  20: #include <netdb.h>
  21: 
  22: extern  char *index();
  23: extern  unsigned long inet_addr();
  24: extern  long gethostid();
  25: 
  26: main(argc, argv)
  27:     int argc;
  28:     char **argv;
  29: {
  30:     register char *id;
  31:     u_long addr;
  32:     long hostid;
  33:     struct hostent *hp;
  34: 
  35:     if (argc < 2) {
  36:         printf("%#x\n", gethostid());
  37:         exit(0);
  38:     }
  39: 
  40:     id = argv[1];
  41:     if (hp = gethostbyname(id)) {
  42:         bcopy(hp->h_addr, &addr, sizeof(addr));
  43:         hostid = addr;
  44:     } else if (index(id, '.')) {
  45:         if ((hostid = inet_addr(id)) == -1)
  46:             goto usage;
  47:     } else {
  48:         if (id[0] == '0' && (id[1] == 'x' || id[1] == 'X'))
  49:             id += 2;
  50:         if (sscanf(id, "%x", &hostid) != 1) {
  51: usage:
  52:             fprintf(stderr,
  53:                 "usage: %s [hexnum or internet address]\n",
  54:                 argv[0]);
  55:             exit(1);
  56:         }
  57:     }
  58: 
  59:     if (sethostid(hostid) < 0) {
  60:         perror("sethostid");
  61:         exit(1);
  62:     }
  63: 
  64:     exit(0);
  65: }

Defined functions

Defined variables