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 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