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  * 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
  34 #if defined(LIBC_SCCS) && !defined(lint)
  35 static char sccsid[] = "@(#)sysctl.c    8.2 (Berkeley) 1/4/94";
  36 #endif /* LIBC_SCCS and not lint */
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD: src/lib/libc/gen/sysctl.c,v 1.5 2003/02/16 17:29:09 nectar Exp $");
  39
  40 #include <sys/param.h>
  41 #include <sys/sysctl.h>
  42
  43 #include <errno.h>
  44 #include <limits.h>
  45 #include <paths.h>
  46 #include <stdio.h>
  47 #include <unistd.h>
  48 #include <string.h>
  49
  50 extern int __sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp,
  51     void *newp, size_t newlen);
  52
  53 int
  54 sysctl(name, namelen, oldp, oldlenp, newp, newlen)
  55         int *name;
  56         u_int namelen;
  57         void *oldp, *newp;
  58         size_t *oldlenp, newlen;
  59 {
  60         if (name[0] != CTL_USER)
  61                 return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen));
  62
  63         if (newp != NULL) {
  64                 errno = EPERM;
  65                 return (-1);
  66         }
  67         if (namelen != 2) {
  68                 errno = EINVAL;
  69                 return (-1);
  70         }
  71
  72         switch (name[1]) {
  73         case USER_CS_PATH:
  74                 if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) {
  75                         errno = ENOMEM;
  76                         return -1;
  77                 }
  78                 *oldlenp = sizeof(_PATH_STDPATH);
  79                 if (oldp != NULL)
  80                         memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
  81                 return (0);
  82         }
  83
  84         if (oldp && *oldlenp < sizeof(int)) {
  85                 errno = ENOMEM;
  86                 return (-1);
  87         }
  88         *oldlenp = sizeof(int);
  89         if (oldp == NULL)
  90                 return (0);
  91
  92         switch (name[1]) {
  93         case USER_BC_BASE_MAX:
  94                 *(int *)oldp = BC_BASE_MAX;
  95                 return (0);
  96         case USER_BC_DIM_MAX:
  97                 *(int *)oldp = BC_DIM_MAX;
  98                 return (0);
  99         case USER_BC_SCALE_MAX:
 100                 *(int *)oldp = BC_SCALE_MAX;
 101                 return (0);
 102         case USER_BC_STRING_MAX:
 103                 *(int *)oldp = BC_STRING_MAX;
 104                 return (0);
 105         case USER_COLL_WEIGHTS_MAX:
 106                 *(int *)oldp = COLL_WEIGHTS_MAX;
 107                 return (0);
 108         case USER_EXPR_NEST_MAX:
 109                 *(int *)oldp = EXPR_NEST_MAX;
 110                 return (0);
 111         case USER_LINE_MAX:
 112                 *(int *)oldp = LINE_MAX;
 113                 return (0);
 114         case USER_RE_DUP_MAX:
 115                 *(int *)oldp = RE_DUP_MAX;
 116                 return (0);
 117         case USER_POSIX2_VERSION:
 118                 *(int *)oldp = _POSIX2_VERSION;
 119                 return (0);
 120         case USER_POSIX2_C_BIND:
 121 #ifdef POSIX2_C_BIND
 122                 *(int *)oldp = 1;
 123 #else
 124                 *(int *)oldp = 0;
 125 #endif
 126                 return (0);
 127         case USER_POSIX2_C_DEV:
 128 #ifdef  POSIX2_C_DEV
 129                 *(int *)oldp = 1;
 130 #else
 131                 *(int *)oldp = 0;
 132 #endif
 133                 return (0);
 134         case USER_POSIX2_CHAR_TERM:
 135 #ifdef  POSIX2_CHAR_TERM
 136                 *(int *)oldp = 1;
 137 #else
 138                 *(int *)oldp = 0;
 139 #endif
 140                 return (0);
 141         case USER_POSIX2_FORT_DEV:
 142 #ifdef  POSIX2_FORT_DEV
 143                 *(int *)oldp = 1;
 144 #else
 145                 *(int *)oldp = 0;
 146 #endif
 147                 return (0);
 148         case USER_POSIX2_FORT_RUN:
 149 #ifdef  POSIX2_FORT_RUN
 150                 *(int *)oldp = 1;
 151 #else
 152                 *(int *)oldp = 0;
 153 #endif
 154                 return (0);
 155         case USER_POSIX2_LOCALEDEF:
 156 #ifdef  POSIX2_LOCALEDEF
 157                 *(int *)oldp = 1;
 158 #else
 159                 *(int *)oldp = 0;
 160 #endif
 161                 return (0);
 162         case USER_POSIX2_SW_DEV:
 163 #ifdef  POSIX2_SW_DEV
 164                 *(int *)oldp = 1;
 165 #else
 166                 *(int *)oldp = 0;
 167 #endif
 168                 return (0);
 169         case USER_POSIX2_UPE:
 170 #ifdef  POSIX2_UPE
 171                 *(int *)oldp = 1;
 172 #else
 173                 *(int *)oldp = 0;
 174 #endif
 175                 return (0);
 176         case USER_STREAM_MAX:
 177                 *(int *)oldp = FOPEN_MAX;
 178                 return (0);
 179         case USER_TZNAME_MAX:
 180                 *(int *)oldp = NAME_MAX;
 181                 return (0);
 182         default:
 183                 errno = EINVAL;
 184                 return (-1);
 185         }
 186         /* NOTREACHED */
 187 }