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sysctl.c revision 1.2 
      1 /*	$NetBSD: sysctl.c,v 1.2 1995/02/27 05:52:25 cgd Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #if defined(LIBC_SCCS) && !defined(lint)
     37 #if 0
     38 static char sccsid[] = "@(#)sysctl.c	8.2 (Berkeley) 1/4/94";
     39 #else
     40 static char rcsid[] = "$NetBSD";
     41 #endif
     42 #endif /* LIBC_SCCS and not lint */
     43 
     44 #include <sys/param.h>
     45 #include <sys/sysctl.h>
     46 
     47 #include <errno.h>
     48 #include <limits.h>
     49 #include <paths.h>
     50 #include <stdio.h>
     51 #include <unistd.h>
     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 			return (ENOMEM);
     76 		*oldlenp = sizeof(_PATH_STDPATH);
     77 		if (oldp != NULL)
     78 			memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
     79 		return (0);
     80 	}
     81 
     82 	if (oldp && *oldlenp < sizeof(int))
     83 		return (ENOMEM);
     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