1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1987-1990,2002 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <sys/types.h>
28 #include <sys/ethernet.h>
29
30 #include <netdb.h>
31 #include <stdio.h>
32 #include <strings.h>
33
34 /*
35 * Filter to convert addresses in /etc/ethers file to standard form
36 */
37
38 int
main(int argc,char ** argv)39 main(int argc, char **argv)
40 {
41 /*
42 * The hostname buffer must be at least as large as the line buffer
43 * to avoid buffer overflows when ether_line(3SOCKET) is called.
44 * We simply use the same size for both buffers to be safe.
45 */
46 char line[MAXHOSTNAMELEN + 256], *lf, hostname[sizeof (line)];
47 struct ether_addr e;
48 FILE *in;
49
50 if (argc > 1) {
51 in = fopen(argv[1], "r");
52 if (in == NULL) {
53 fprintf(stderr,
54 "%s: can't open %s\n", argv[0], argv[1]);
55 return (1);
56 }
57 } else {
58 in = stdin;
59 }
60 while (fgets(line, sizeof (line), in) != NULL) {
61 lf = strchr(line, '\n');
62 if (lf != NULL)
63 *lf = '\0';
64 if ((line[0] == '#') || (line[0] == '\0'))
65 continue;
66 if (ether_line(line, &e, hostname) == 0) {
67 (void) fprintf(stdout, "%s\t%s\n", ether_ntoa(&e),
68 hostname);
69 } else {
70 (void) fprintf(stderr,
71 "%s: ignoring line: %s\n", argv[0], line);
72 }
73 }
74 return (0);
75 }
76