setfib.c revision 179552
1178888Sjulian/* 2178888Sjulian * Copyright (c) 1989, 1993, 1994 3178888Sjulian * The Regents of the University of California. All rights reserved. 4178888Sjulian * Copyright (c) 2008 Cisco Systems, All rights reserved 5178888Sjulian * 6178888Sjulian * Redistribution and use in source and binary forms, with or without 7178888Sjulian * modification, are permitted provided that the following conditions 8178888Sjulian * are met: 9178888Sjulian * 1. Redistributions of source code must retain the above copyright 10178888Sjulian * notice, this list of conditions and the following disclaimer. 11178888Sjulian * 2. Redistributions in binary form must reproduce the above copyright 12178888Sjulian * notice, this list of conditions and the following disclaimer in the 13178888Sjulian * documentation and/or other materials provided with the distribution. 14178888Sjulian * 4. Neither the name of the University nor the names of its contributors 15178888Sjulian * may be used to endorse or promote products derived from this software 16178888Sjulian * without specific prior written permission. 17178888Sjulian * 18178888Sjulian * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19178888Sjulian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20178888Sjulian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21178888Sjulian * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22178888Sjulian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23178888Sjulian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24178888Sjulian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25178888Sjulian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26178888Sjulian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27178888Sjulian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28178888Sjulian * SUCH DAMAGE. 29178888Sjulian * 30178888Sjulian * setfib file skelaton taken from nice.c 31178888Sjulian */ 32178888Sjulian 33178888Sjulian#include <sys/cdefs.h> 34178888Sjulian__FBSDID("$FreeBSD: head/usr.sbin/setfib/setfib.c 179552 2008-06-04 23:31:53Z mlaier $"); 35178888Sjulian 36178888Sjulian 37178888Sjulian#include <errno.h> 38178888Sjulian#include <limits.h> 39178888Sjulian#include <stdio.h> 40178888Sjulian#include <stdlib.h> 41178888Sjulian#include <unistd.h> 42178888Sjulian#include <sys/sysctl.h> 43178888Sjulian 44178888Sjulianvoid usage(void); 45178888Sjulian 46178888Sjulianint 47178888Sjulianmain(int argc, char *argv[]) 48178888Sjulian{ 49178888Sjulian long fib = 0; 50178888Sjulian int ch; 51178888Sjulian char *ep; 52178888Sjulian int numfibs; 53178916Sjulian size_t intsize = sizeof(int); 54178888Sjulian 55178888Sjulian if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1) 56178888Sjulian errx(1, "Multiple FIBS not supported"); 57178888Sjulian if (argc < 2) 58178888Sjulian usage(); 59178888Sjulian ep = argv[1]; 60178888Sjulian /* 61178888Sjulian * convert -N or N to -FN. (N is a number) 62178888Sjulian */ 63178888Sjulian if (ep[0]== '-' && isdigit((unsigned char)ep[1])) 64178888Sjulian ep++; 65178888Sjulian if (isdigit((unsigned char)*ep)) 66178888Sjulian if (asprintf(&argv[1], "-F%s", ep) < 0) 67178888Sjulian err(1, "asprintf"); 68178888Sjulian 69178888Sjulian while ((ch = getopt(argc, argv, "F:")) != -1) { 70178888Sjulian switch (ch) { 71178888Sjulian case 'F': 72178888Sjulian errno = 0; 73178888Sjulian fib = strtol(optarg, &ep, 10); 74178888Sjulian if (ep == optarg || *ep != '\0' || errno || 75178888Sjulian fib < 0 || fib >= numfibs) 76178888Sjulian errx(1, "%s: invalid FIB (max %s)", 77178888Sjulian optarg, numfibs - 1); 78178888Sjulian break; 79178888Sjulian default: 80178888Sjulian usage(); 81178888Sjulian } 82178888Sjulian } 83178888Sjulian argc -= optind; 84178888Sjulian argv += optind; 85178888Sjulian 86178888Sjulian if (argc == 0) 87178888Sjulian usage(); 88178888Sjulian 89178888Sjulian errno = 0; 90178888Sjulian if (syscall(175, (int)fib)) 91178888Sjulian warn("setfib"); 92178888Sjulian execvp(*argv, argv); 93178888Sjulian err(errno == ENOENT ? 127 : 126, "%s", *argv); 94178888Sjulian} 95178888Sjulian 96178888Sjulianvoid 97178888Sjulianusage(void) 98178888Sjulian{ 99178888Sjulian 100178888Sjulian (void)fprintf(stderr, 101179552Smlaier "usage: setfib [-[F]]value command\n"); 102178888Sjulian exit(1); 103178888Sjulian} 104