sysctl.c revision 1.12
1 /* $NetBSD: sysctl.c,v 1.12 2002/12/19 23:31:55 kleink 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)sysctl.c 8.2 (Berkeley) 1/4/94"; 40 #else 41 __RCSID("$NetBSD: sysctl.c,v 1.12 2002/12/19 23:31:55 kleink Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 #include <sys/param.h> 47 #include <sys/sysctl.h> 48 49 #include <assert.h> 50 #include <errno.h> 51 #include <limits.h> 52 #include <paths.h> 53 #include <stdio.h> 54 #include <string.h> 55 #include <unistd.h> 56 #include "extern.h" 57 58 #ifdef __weak_alias 59 __weak_alias(sysctl,_sysctl) 60 #endif 61 62 int 63 sysctl(name, namelen, oldp, oldlenp, newp, newlen) 64 int *name; 65 unsigned int namelen; 66 void *oldp; 67 const void *newp; 68 size_t *oldlenp, newlen; 69 { 70 71 _DIAGASSERT(name != NULL); 72 73 if (name[0] != CTL_USER) 74 /* LINTED will fix when sysctl interface gets corrected */ 75 return (__sysctl(name, namelen, oldp, oldlenp, 76 (void *)newp, newlen)); 77 78 if (newp != NULL) { 79 errno = EPERM; 80 return (-1); 81 } 82 if (namelen != 2) { 83 errno = EINVAL; 84 return (-1); 85 } 86 87 switch (name[1]) { 88 case USER_CS_PATH: 89 if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) 90 return (ENOMEM); 91 *oldlenp = sizeof(_PATH_STDPATH); 92 if (oldp != NULL) 93 memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH)); 94 return (0); 95 } 96 97 if (oldp && *oldlenp < sizeof(int)) 98 return (ENOMEM); 99 *oldlenp = sizeof(int); 100 if (oldp == NULL) 101 return (0); 102 103 switch (name[1]) { 104 case USER_BC_BASE_MAX: 105 *(int *)oldp = BC_BASE_MAX; 106 return (0); 107 case USER_BC_DIM_MAX: 108 *(int *)oldp = BC_DIM_MAX; 109 return (0); 110 case USER_BC_SCALE_MAX: 111 *(int *)oldp = BC_SCALE_MAX; 112 return (0); 113 case USER_BC_STRING_MAX: 114 *(int *)oldp = BC_STRING_MAX; 115 return (0); 116 case USER_COLL_WEIGHTS_MAX: 117 *(int *)oldp = COLL_WEIGHTS_MAX; 118 return (0); 119 case USER_EXPR_NEST_MAX: 120 *(int *)oldp = EXPR_NEST_MAX; 121 return (0); 122 case USER_LINE_MAX: 123 *(int *)oldp = LINE_MAX; 124 return (0); 125 case USER_RE_DUP_MAX: 126 *(int *)oldp = RE_DUP_MAX; 127 return (0); 128 case USER_POSIX2_VERSION: 129 *(int *)oldp = _POSIX2_VERSION; 130 return (0); 131 case USER_POSIX2_C_BIND: 132 #ifdef POSIX2_C_BIND 133 *(int *)oldp = 1; 134 #else 135 *(int *)oldp = 0; 136 #endif 137 return (0); 138 case USER_POSIX2_C_DEV: 139 #ifdef POSIX2_C_DEV 140 *(int *)oldp = 1; 141 #else 142 *(int *)oldp = 0; 143 #endif 144 return (0); 145 case USER_POSIX2_CHAR_TERM: 146 #ifdef POSIX2_CHAR_TERM 147 *(int *)oldp = 1; 148 #else 149 *(int *)oldp = 0; 150 #endif 151 return (0); 152 case USER_POSIX2_FORT_DEV: 153 #ifdef POSIX2_FORT_DEV 154 *(int *)oldp = 1; 155 #else 156 *(int *)oldp = 0; 157 #endif 158 return (0); 159 case USER_POSIX2_FORT_RUN: 160 #ifdef POSIX2_FORT_RUN 161 *(int *)oldp = 1; 162 #else 163 *(int *)oldp = 0; 164 #endif 165 return (0); 166 case USER_POSIX2_LOCALEDEF: 167 #ifdef POSIX2_LOCALEDEF 168 *(int *)oldp = 1; 169 #else 170 *(int *)oldp = 0; 171 #endif 172 return (0); 173 case USER_POSIX2_SW_DEV: 174 #ifdef POSIX2_SW_DEV 175 *(int *)oldp = 1; 176 #else 177 *(int *)oldp = 0; 178 #endif 179 return (0); 180 case USER_POSIX2_UPE: 181 #ifdef POSIX2_UPE 182 *(int *)oldp = 1; 183 #else 184 *(int *)oldp = 0; 185 #endif 186 return (0); 187 case USER_STREAM_MAX: 188 *(int *)oldp = FOPEN_MAX; 189 return (0); 190 case USER_TZNAME_MAX: 191 *(int *)oldp = NAME_MAX; 192 return (0); 193 case USER_ATEXIT_MAX: 194 *(int *)oldp = -1; /* ANSI C minimum provided; not limited */ 195 return (0); 196 default: 197 errno = EINVAL; 198 return (-1); 199 } 200 /* NOTREACHED */ 201 } 202
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