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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)sysctl.c 8.2 (Berkeley) 1/4/94 30 * $FreeBSD: head/lib/libc/gen/sysctl.c 240176 2012-09-06 20:15:44Z trhodes $ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/sysctl.h> 35 36 #include <errno.h> 37 #include <limits.h> 38 #include <paths.h> 39 #include <stdio.h> 40 #include <unistd.h> 41 #include <string.h> 42 43 extern int __sysctl(const int *name, u_int namelen, void *oldp, 44 size_t *oldlenp, const void *newp, size_t newlen); 45 46 int 47 sysctl(const int *name, u_int namelen, void *oldp, size_t *oldlenp, 48 const void *newp, size_t newlen) 49 { 50 int retval; 51 52 retval = __sysctl(name, namelen, oldp, oldlenp, newp, newlen); 53 if (retval != -1 || errno != ENOENT || name[0] != CTL_USER) 54 return (retval); 55 56 if (newp != NULL) { 57 errno = EPERM; 58 return (-1); 59 } 60 if (namelen != 2) { 61 errno = EINVAL; 62 return (-1); 63 } 64 65 switch (name[1]) { 66 case USER_CS_PATH: 67 if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) { 68 errno = ENOMEM; 69 return -1; 70 } 71 *oldlenp = sizeof(_PATH_STDPATH); 72 if (oldp != NULL) 73 memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH)); 74 return (0); 75 } 76 77 if (oldp && *oldlenp < sizeof(int)) { 78 errno = ENOMEM; 79 return (-1); 80 } 81 *oldlenp = sizeof(int); 82 if (oldp == NULL) 83 return (0); 84 85 switch (name[1]) { 86 case USER_BC_BASE_MAX: 87 *(int *)oldp = BC_BASE_MAX; 88 return (0); 89 case USER_BC_DIM_MAX: 90 *(int *)oldp = BC_DIM_MAX; 91 return (0); 92 case USER_BC_SCALE_MAX: 93 *(int *)oldp = BC_SCALE_MAX; 94 return (0); 95 case USER_BC_STRING_MAX: 96 *(int *)oldp = BC_STRING_MAX; 97 return (0); 98 case USER_COLL_WEIGHTS_MAX: 99 *(int *)oldp = COLL_WEIGHTS_MAX; 100 return (0); 101 case USER_EXPR_NEST_MAX: 102 *(int *)oldp = EXPR_NEST_MAX; 103 return (0); 104 case USER_LINE_MAX: 105 *(int *)oldp = LINE_MAX; 106 return (0); 107 case USER_RE_DUP_MAX: 108 *(int *)oldp = RE_DUP_MAX; 109 return (0); 110 case USER_POSIX2_VERSION: 111 *(int *)oldp = _POSIX2_VERSION; 112 return (0); 113 case USER_POSIX2_C_BIND: 114 #ifdef POSIX2_C_BIND 115 *(int *)oldp = 1; 116 #else 117 *(int *)oldp = 0; 118 #endif 119 return (0); 120 case USER_POSIX2_C_DEV: 121 #ifdef POSIX2_C_DEV 122 *(int *)oldp = 1; 123 #else 124 *(int *)oldp = 0; 125 #endif 126 return (0); 127 case USER_POSIX2_CHAR_TERM: 128 #ifdef POSIX2_CHAR_TERM 129 *(int *)oldp = 1; 130 #else 131 *(int *)oldp = 0; 132 #endif 133 return (0); 134 case USER_POSIX2_FORT_DEV: 135 #ifdef POSIX2_FORT_DEV 136 *(int *)oldp = 1; 137 #else 138 *(int *)oldp = 0; 139 #endif 140 return (0); 141 case USER_POSIX2_FORT_RUN: 142 #ifdef POSIX2_FORT_RUN 143 *(int *)oldp = 1; 144 #else 145 *(int *)oldp = 0; 146 #endif 147 return (0); 148 case USER_POSIX2_LOCALEDEF: 149 #ifdef POSIX2_LOCALEDEF 150 *(int *)oldp = 1; 151 #else 152 *(int *)oldp = 0; 153 #endif 154 return (0); 155 case USER_POSIX2_SW_DEV: 156 #ifdef POSIX2_SW_DEV 157 *(int *)oldp = 1; 158 #else 159 *(int *)oldp = 0; 160 #endif 161 return (0); 162 case USER_POSIX2_UPE: 163 #ifdef POSIX2_UPE 164 *(int *)oldp = 1; 165 #else 166 *(int *)oldp = 0; 167 #endif 168 return (0); 169 case USER_STREAM_MAX: 170 *(int *)oldp = FOPEN_MAX; 171 return (0); 172 case USER_TZNAME_MAX: 173 *(int *)oldp = NAME_MAX; 174 return (0); 175 default: 176 errno = EINVAL; 177 return (-1); 178 } 179 /* NOTREACHED */ 180 } 181