1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 1993, 1994
5 *	The Regents of the University of California.  All rights reserved.
6 * Copyright (c) 2008 Cisco Systems, All rights reserved
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * setfib file skelaton taken from nice.c
33 */
34
35#include <sys/cdefs.h>
36#include <ctype.h>
37#include <err.h>
38#include <errno.h>
39#include <limits.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <unistd.h>
43#include <sys/socket.h>
44#include <sys/sysctl.h>
45
46static void usage(void) __dead2;
47
48int
49main(int argc, char *argv[])
50{
51	long fib = 0;
52	int ch;
53	char *ep;
54	int	numfibs;
55	size_t intsize = sizeof(int);
56
57        if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
58		errx(1, "Multiple FIBS not supported");
59	if (argc < 2)
60		usage();
61	ep = argv[1];
62	/*
63	 * convert -N or N to -FN. (N is a number)
64	 */
65	if (ep[0]== '-' && isdigit((unsigned char)ep[1]))
66		ep++;
67	if (isdigit((unsigned char)*ep))
68               if (asprintf(&argv[1], "-F%s", ep) < 0)
69                        err(1, "asprintf");
70
71	while ((ch = getopt(argc, argv, "F:")) != -1) {
72		switch (ch) {
73		case 'F':
74			errno = 0;
75			fib = strtol(optarg, &ep, 10);
76			if (ep == optarg || *ep != '\0' || errno ||
77			    fib < 0 || fib >= numfibs)
78				errx(1, "%s: invalid FIB (max %d)",
79				    optarg, numfibs - 1);
80			break;
81		default:
82			usage();
83		}
84	}
85	argc -= optind;
86	argv += optind;
87
88	if (argc == 0)
89		usage();
90
91	errno = 0;
92	if (setfib((int)fib))
93		warn("setfib");
94	execvp(*argv, argv);
95	err(errno == ENOENT ? 127 : 126, "%s", *argv);
96}
97
98static void
99usage(void)
100{
101
102	(void)fprintf(stderr,
103	    "usage: setfib [-[F]]value command\n");
104	exit(1);
105}
106