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 * 4. 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 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char sccsid[] = "@(#)sysctl.c 8.2 (Berkeley) 1/4/94"; 32 #endif /* LIBC_SCCS and not lint */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 #include <sys/sysctl.h> 38 39 #include <errno.h> 40 #include <limits.h> 41 #include <paths.h> 42 #include <stdio.h> 43 #include <unistd.h> 44 #include <string.h> 45 46 extern int __sysctl(const int *name, u_int namelen, void *oldp, 47 size_t *oldlenp, const void *newp, size_t newlen); 48 49 int 50 sysctl(const int *name, u_int namelen, void *oldp, size_t *oldlenp, 51 const void *newp, size_t newlen) 52 { 53 int retval; 54 55 retval = __sysctl(name, namelen, oldp, oldlenp, newp, newlen); 56 if (retval != -1 || errno != ENOENT || name[0] != CTL_USER) 57 return (retval); 58 59 if (newp != NULL) { 60 errno = EPERM; 61 return (-1); 62 } 63 if (namelen != 2) { 64 errno = EINVAL; 65 return (-1); 66 } 67 68 switch (name[1]) { 69 case USER_CS_PATH: 70 if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) { 71 errno = ENOMEM; 72 return -1; 73 } 74 *oldlenp = sizeof(_PATH_STDPATH); 75 if (oldp != NULL) 76 memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH)); 77 return (0); 78 } 79 80 if (oldp && *oldlenp < sizeof(int)) { 81 errno = ENOMEM; 82 return (-1); 83 } 84 *oldlenp = sizeof(int); 85 if (oldp == NULL) 86 return (0); 87 88 switch (name[1]) { 89 case USER_BC_BASE_MAX: 90 *(int *)oldp = BC_BASE_MAX; 91 return (0); 92 case USER_BC_DIM_MAX: 93 *(int *)oldp = BC_DIM_MAX; 94 return (0); 95 case USER_BC_SCALE_MAX: 96 *(int *)oldp = BC_SCALE_MAX; 97 return (0); 98 case USER_BC_STRING_MAX: 99 *(int *)oldp = BC_STRING_MAX; 100 return (0); 101 case USER_COLL_WEIGHTS_MAX: 102 *(int *)oldp = COLL_WEIGHTS_MAX; 103 return (0); 104 case USER_EXPR_NEST_MAX: 105 *(int *)oldp = EXPR_NEST_MAX; 106 return (0); 107 case USER_LINE_MAX: 108 *(int *)oldp = LINE_MAX; 109 return (0); 110 case USER_RE_DUP_MAX: 111 *(int *)oldp = RE_DUP_MAX; 112 return (0); 113 case USER_POSIX2_VERSION: 114 *(int *)oldp = _POSIX2_VERSION; 115 return (0); 116 case USER_POSIX2_C_BIND: 117 #ifdef POSIX2_C_BIND 118 *(int *)oldp = 1; 119 #else 120 *(int *)oldp = 0; 121 #endif 122 return (0); 123 case USER_POSIX2_C_DEV: 124 #ifdef POSIX2_C_DEV 125 *(int *)oldp = 1; 126 #else 127 *(int *)oldp = 0; 128 #endif 129 return (0); 130 case USER_POSIX2_CHAR_TERM: 131 #ifdef POSIX2_CHAR_TERM 132 *(int *)oldp = 1; 133 #else 134 *(int *)oldp = 0; 135 #endif 136 return (0); 137 case USER_POSIX2_FORT_DEV: 138 #ifdef POSIX2_FORT_DEV 139 *(int *)oldp = 1; 140 #else 141 *(int *)oldp = 0; 142 #endif 143 return (0); 144 case USER_POSIX2_FORT_RUN: 145 #ifdef POSIX2_FORT_RUN 146 *(int *)oldp = 1; 147 #else 148 *(int *)oldp = 0; 149 #endif 150 return (0); 151 case USER_POSIX2_LOCALEDEF: 152 #ifdef POSIX2_LOCALEDEF 153 *(int *)oldp = 1; 154 #else 155 *(int *)oldp = 0; 156 #endif 157 return (0); 158 case USER_POSIX2_SW_DEV: 159 #ifdef POSIX2_SW_DEV 160 *(int *)oldp = 1; 161 #else 162 *(int *)oldp = 0; 163 #endif 164 return (0); 165 case USER_POSIX2_UPE: 166 #ifdef POSIX2_UPE 167 *(int *)oldp = 1; 168 #else 169 *(int *)oldp = 0; 170 #endif 171 return (0); 172 case USER_STREAM_MAX: 173 *(int *)oldp = FOPEN_MAX; 174 return (0); 175 case USER_TZNAME_MAX: 176 *(int *)oldp = NAME_MAX; 177 return (0); 178 default: 179 errno = EINVAL; 180 return (-1); 181 } 182 /* NOTREACHED */ 183 } 184