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
46 static void usage(void) __dead2;
47
48 int
main(int argc,char * argv[])49 main(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
98 static void
usage(void)99 usage(void)
100 {
101
102 (void)fprintf(stderr,
103 "usage: setfib [-[F]]value command\n");
104 exit(1);
105 }
106