lib/libc/gen/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  * @(#)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 }