1 /*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)sysctl.c 8.2 (Berkeley) 1/4/94 34 * $DragonFly: src/lib/libc/gen/sysctl.c,v 1.3 2005/11/13 00:07:42 swildner Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/sysctl.h> 39 40 #include <errno.h> 41 #include <limits.h> 42 #include <paths.h> 43 #include <stdio.h> 44 #include <unistd.h> 45 #include <string.h> 46 47 int 48 sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, 49 size_t newlen) 50 { 51 if (name[0] != CTL_USER) 52 return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen)); 53 54 if (newp != NULL) { 55 errno = EPERM; 56 return (-1); 57 } 58 if (namelen != 2) { 59 errno = EINVAL; 60 return (-1); 61 } 62 63 switch (name[1]) { 64 case USER_CS_PATH: 65 if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) { 66 errno = ENOMEM; 67 return -1; 68 } 69 *oldlenp = sizeof(_PATH_STDPATH); 70 if (oldp != NULL) 71 memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH)); 72 return (0); 73 } 74 75 if (oldp && *oldlenp < sizeof(int)) { 76 errno = ENOMEM; 77 return (-1); 78 } 79 *oldlenp = sizeof(int); 80 if (oldp == NULL) 81 return (0); 82 83 switch (name[1]) { 84 case USER_BC_BASE_MAX: 85 *(int *)oldp = BC_BASE_MAX; 86 return (0); 87 case USER_BC_DIM_MAX: 88 *(int *)oldp = BC_DIM_MAX; 89 return (0); 90 case USER_BC_SCALE_MAX: 91 *(int *)oldp = BC_SCALE_MAX; 92 return (0); 93 case USER_BC_STRING_MAX: 94 *(int *)oldp = BC_STRING_MAX; 95 return (0); 96 case USER_COLL_WEIGHTS_MAX: 97 *(int *)oldp = COLL_WEIGHTS_MAX; 98 return (0); 99 case USER_EXPR_NEST_MAX: 100 *(int *)oldp = EXPR_NEST_MAX; 101 return (0); 102 case USER_LINE_MAX: 103 *(int *)oldp = LINE_MAX; 104 return (0); 105 case USER_RE_DUP_MAX: 106 *(int *)oldp = RE_DUP_MAX; 107 return (0); 108 case USER_POSIX2_VERSION: 109 *(int *)oldp = _POSIX2_VERSION; 110 return (0); 111 case USER_POSIX2_C_BIND: 112 #ifdef POSIX2_C_BIND 113 *(int *)oldp = 1; 114 #else 115 *(int *)oldp = 0; 116 #endif 117 return (0); 118 case USER_POSIX2_C_DEV: 119 #ifdef POSIX2_C_DEV 120 *(int *)oldp = 1; 121 #else 122 *(int *)oldp = 0; 123 #endif 124 return (0); 125 case USER_POSIX2_CHAR_TERM: 126 #ifdef POSIX2_CHAR_TERM 127 *(int *)oldp = 1; 128 #else 129 *(int *)oldp = 0; 130 #endif 131 return (0); 132 case USER_POSIX2_FORT_DEV: 133 #ifdef POSIX2_FORT_DEV 134 *(int *)oldp = 1; 135 #else 136 *(int *)oldp = 0; 137 #endif 138 return (0); 139 case USER_POSIX2_FORT_RUN: 140 #ifdef POSIX2_FORT_RUN 141 *(int *)oldp = 1; 142 #else 143 *(int *)oldp = 0; 144 #endif 145 return (0); 146 case USER_POSIX2_LOCALEDEF: 147 #ifdef POSIX2_LOCALEDEF 148 *(int *)oldp = 1; 149 #else 150 *(int *)oldp = 0; 151 #endif 152 return (0); 153 case USER_POSIX2_SW_DEV: 154 #ifdef POSIX2_SW_DEV 155 *(int *)oldp = 1; 156 #else 157 *(int *)oldp = 0; 158 #endif 159 return (0); 160 case USER_POSIX2_UPE: 161 #ifdef POSIX2_UPE 162 *(int *)oldp = 1; 163 #else 164 *(int *)oldp = 0; 165 #endif 166 return (0); 167 case USER_STREAM_MAX: 168 *(int *)oldp = FOPEN_MAX; 169 return (0); 170 case USER_TZNAME_MAX: 171 *(int *)oldp = NAME_MAX; 172 return (0); 173 default: 174 errno = EINVAL; 175 return (-1); 176 } 177 /* NOTREACHED */ 178 } 179