gen/FreeBSD/sysctl.c

   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: src/lib/libc/gen/sysctl.c,v 1.6 2007/01/09 00:27:55 imp Exp $");
  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(int *name, u_int namelen, void *oldp, size_t *oldlenp,
  47     void *newp, size_t newlen);
  48
  49 int
  50 sysctl(name, namelen, oldp, oldlenp, newp, newlen)
  51         int *name;
  52         u_int namelen;
  53         void *oldp, *newp;
  54         size_t *oldlenp, newlen;
  55 {
  56         if (name[0] != CTL_USER)
  57                 return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen));
  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 }