stdethers.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1987-1990,2002 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/ethernet.h>
#include <netdb.h>
#include <stdio.h>
#include <strings.h>
/*
* Filter to convert addresses in /etc/ethers file to standard form
*/
int
main(int argc, char **argv)
{
/*
* The hostname buffer must be at least as large as the line buffer
* to avoid buffer overflows when ether_line(3SOCKET) is called.
* We simply use the same size for both buffers to be safe.
*/
char line[MAXHOSTNAMELEN + 256], *lf, hostname[sizeof (line)];
struct ether_addr e;
FILE *in;
if (argc > 1) {
in = fopen(argv[1], "r");
if (in == NULL) {
fprintf(stderr,
"%s: can't open %s\n", argv[0], argv[1]);
return (1);
}
} else {
in = stdin;
}
while (fgets(line, sizeof (line), in) != NULL) {
lf = strchr(line, '\n');
if (lf != NULL)
*lf = '\0';
if ((line[0] == '#') || (line[0] == '\0'))
continue;
if (ether_line(line, &e, hostname) == 0) {
(void) fprintf(stdout, "%s\t%s\n", ether_ntoa(&e),
hostname);
} else {
(void) fprintf(stderr,
"%s: ignoring line: %s\n", argv[0], line);
}
}
return (0);
}