sysctl.c revision 1.13
1/* $NetBSD: sysctl.c,v 1.13 2003/08/07 16:42:57 agc Exp $ */ 2 3/*- 4 * Copyright (c) 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33#if defined(LIBC_SCCS) && !defined(lint) 34#if 0 35static char sccsid[] = "@(#)sysctl.c 8.2 (Berkeley) 1/4/94"; 36#else 37__RCSID("$NetBSD: sysctl.c,v 1.13 2003/08/07 16:42:57 agc Exp $"); 38#endif 39#endif /* LIBC_SCCS and not lint */ 40 41#include "namespace.h" 42#include <sys/param.h> 43#include <sys/sysctl.h> 44 45#include <assert.h> 46#include <errno.h> 47#include <limits.h> 48#include <paths.h> 49#include <stdio.h> 50#include <string.h> 51#include <unistd.h> 52#include "extern.h" 53 54#ifdef __weak_alias 55__weak_alias(sysctl,_sysctl) 56#endif 57 58int 59sysctl(name, namelen, oldp, oldlenp, newp, newlen) 60 int *name; 61 unsigned int namelen; 62 void *oldp; 63 const void *newp; 64 size_t *oldlenp, newlen; 65{ 66 67 _DIAGASSERT(name != NULL); 68 69 if (name[0] != CTL_USER) 70 /* LINTED will fix when sysctl interface gets corrected */ 71 return (__sysctl(name, namelen, oldp, oldlenp, 72 (void *)newp, newlen)); 73 74 if (newp != NULL) { 75 errno = EPERM; 76 return (-1); 77 } 78 if (namelen != 2) { 79 errno = EINVAL; 80 return (-1); 81 } 82 83 switch (name[1]) { 84 case USER_CS_PATH: 85 if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) 86 return (ENOMEM); 87 *oldlenp = sizeof(_PATH_STDPATH); 88 if (oldp != NULL) 89 memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH)); 90 return (0); 91 } 92 93 if (oldp && *oldlenp < sizeof(int)) 94 return (ENOMEM); 95 *oldlenp = sizeof(int); 96 if (oldp == NULL) 97 return (0); 98 99 switch (name[1]) { 100 case USER_BC_BASE_MAX: 101 *(int *)oldp = BC_BASE_MAX; 102 return (0); 103 case USER_BC_DIM_MAX: 104 *(int *)oldp = BC_DIM_MAX; 105 return (0); 106 case USER_BC_SCALE_MAX: 107 *(int *)oldp = BC_SCALE_MAX; 108 return (0); 109 case USER_BC_STRING_MAX: 110 *(int *)oldp = BC_STRING_MAX; 111 return (0); 112 case USER_COLL_WEIGHTS_MAX: 113 *(int *)oldp = COLL_WEIGHTS_MAX; 114 return (0); 115 case USER_EXPR_NEST_MAX: 116 *(int *)oldp = EXPR_NEST_MAX; 117 return (0); 118 case USER_LINE_MAX: 119 *(int *)oldp = LINE_MAX; 120 return (0); 121 case USER_RE_DUP_MAX: 122 *(int *)oldp = RE_DUP_MAX; 123 return (0); 124 case USER_POSIX2_VERSION: 125 *(int *)oldp = _POSIX2_VERSION; 126 return (0); 127 case USER_POSIX2_C_BIND: 128#ifdef POSIX2_C_BIND 129 *(int *)oldp = 1; 130#else 131 *(int *)oldp = 0; 132#endif 133 return (0); 134 case USER_POSIX2_C_DEV: 135#ifdef POSIX2_C_DEV 136 *(int *)oldp = 1; 137#else 138 *(int *)oldp = 0; 139#endif 140 return (0); 141 case USER_POSIX2_CHAR_TERM: 142#ifdef POSIX2_CHAR_TERM 143 *(int *)oldp = 1; 144#else 145 *(int *)oldp = 0; 146#endif 147 return (0); 148 case USER_POSIX2_FORT_DEV: 149#ifdef POSIX2_FORT_DEV 150 *(int *)oldp = 1; 151#else 152 *(int *)oldp = 0; 153#endif 154 return (0); 155 case USER_POSIX2_FORT_RUN: 156#ifdef POSIX2_FORT_RUN 157 *(int *)oldp = 1; 158#else 159 *(int *)oldp = 0; 160#endif 161 return (0); 162 case USER_POSIX2_LOCALEDEF: 163#ifdef POSIX2_LOCALEDEF 164 *(int *)oldp = 1; 165#else 166 *(int *)oldp = 0; 167#endif 168 return (0); 169 case USER_POSIX2_SW_DEV: 170#ifdef POSIX2_SW_DEV 171 *(int *)oldp = 1; 172#else 173 *(int *)oldp = 0; 174#endif 175 return (0); 176 case USER_POSIX2_UPE: 177#ifdef POSIX2_UPE 178 *(int *)oldp = 1; 179#else 180 *(int *)oldp = 0; 181#endif 182 return (0); 183 case USER_STREAM_MAX: 184 *(int *)oldp = FOPEN_MAX; 185 return (0); 186 case USER_TZNAME_MAX: 187 *(int *)oldp = NAME_MAX; 188 return (0); 189 case USER_ATEXIT_MAX: 190 *(int *)oldp = -1; /* ANSI C minimum provided; not limited */ 191 return (0); 192 default: 193 errno = EINVAL; 194 return (-1); 195 } 196 /* NOTREACHED */ 197} 198