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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/types.h> 30 #include <sys/ethernet.h> 31 32 #include <netdb.h> 33 #include <stdio.h> 34 #include <strings.h> 35 36 /* 37 * Filter to convert addresses in /etc/ethers file to standard form 38 */ 39 40 int 41 main(int argc, char **argv) 42 { 43 /* 44 * The hostname buffer must be at least as large as the line buffer 45 * to avoid buffer overflows when ether_line(3SOCKET) is called. 46 * We simply use the same size for both buffers to be safe. 47 */ 48 char line[MAXHOSTNAMELEN + 256], *lf, hostname[sizeof (line)]; 49 struct ether_addr e; 50 FILE *in; 51 52 if (argc > 1) { 53 in = fopen(argv[1], "r"); 54 if (in == NULL) { 55 fprintf(stderr, 56 "%s: can't open %s\n", argv[0], argv[1]); 57 return (1); 58 } 59 } else { 60 in = stdin; 61 } 62 while (fgets(line, sizeof (line), in) != NULL) { 63 lf = strchr(line, '\n'); 64 if (lf != NULL) 65 *lf = '\0'; 66 if ((line[0] == '#') || (line[0] == '\0')) 67 continue; 68 if (ether_line(line, &e, hostname) == 0) { 69 (void) fprintf(stdout, "%s\t%s\n", ether_ntoa(&e), 70 hostname); 71 } else { 72 (void) fprintf(stderr, 73 "%s: ignoring line: %s\n", argv[0], line); 74 } 75 } 76 return (0); 77 } 78