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sysctl.c revision 1.1 
      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 
     38 #include <sys/param.h>
     39 #include <sys/sysctl.h>
     40 
     41 #include <errno.h>
     42 #include <limits.h>
     43 #include <paths.h>
     44 #include <stdio.h>
     45 #include <unistd.h>
     46 
     47 int
     48 sysctl(name, namelen, oldp, oldlenp, newp, newlen)
     49 	int *name;
     50 	u_int namelen;
     51 	void *oldp, *newp;
     52 	size_t *oldlenp, newlen;
     53 {
     54 	if (name[0] != CTL_USER)
     55 		return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen));
     56 
     57 	if (newp != NULL) {
     58 		errno = EPERM;
     59 		return (-1);
     60 	}
     61 	if (namelen != 2) {
     62 		errno = EINVAL;
     63 		return (-1);
     64 	}
     65 
     66 	switch (name[1]) {
     67 	case USER_CS_PATH:
     68 		if (oldp && *oldlenp < sizeof(_PATH_STDPATH))
     69 			return (ENOMEM);
     70 		*oldlenp = sizeof(_PATH_STDPATH);
     71 		if (oldp != NULL)
     72 			memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
     73 		return (0);
     74 	}
     75 
     76 	if (oldp && *oldlenp < sizeof(int))
     77 		return (ENOMEM);
     78 	*oldlenp = sizeof(int);
     79 	if (oldp == NULL)
     80 		return (0);
     81 
     82 	switch (name[1]) {
     83 	case USER_BC_BASE_MAX:
     84 		*(int *)oldp = BC_BASE_MAX;
     85 		return (0);
     86 	case USER_BC_DIM_MAX:
     87 		*(int *)oldp = BC_DIM_MAX;
     88 		return (0);
     89 	case USER_BC_SCALE_MAX:
     90 		*(int *)oldp = BC_SCALE_MAX;
     91 		return (0);
     92 	case USER_BC_STRING_MAX:
     93 		*(int *)oldp = BC_STRING_MAX;
     94 		return (0);
     95 	case USER_COLL_WEIGHTS_MAX:
     96 		*(int *)oldp = COLL_WEIGHTS_MAX;
     97 		return (0);
     98 	case USER_EXPR_NEST_MAX:
     99 		*(int *)oldp = EXPR_NEST_MAX;
    100 		return (0);
    101 	case USER_LINE_MAX:
    102 		*(int *)oldp = LINE_MAX;
    103 		return (0);
    104 	case USER_RE_DUP_MAX:
    105 		*(int *)oldp = RE_DUP_MAX;
    106 		return (0);
    107 	case USER_POSIX2_VERSION:
    108 		*(int *)oldp = _POSIX2_VERSION;
    109 		return (0);
    110 	case USER_POSIX2_C_BIND:
    111 #ifdef POSIX2_C_BIND
    112 		*(int *)oldp = 1;
    113 #else
    114 		*(int *)oldp = 0;
    115 #endif
    116 		return (0);
    117 	case USER_POSIX2_C_DEV:
    118 #ifdef	POSIX2_C_DEV
    119 		*(int *)oldp = 1;
    120 #else
    121 		*(int *)oldp = 0;
    122 #endif
    123 		return (0);
    124 	case USER_POSIX2_CHAR_TERM:
    125 #ifdef	POSIX2_CHAR_TERM
    126 		*(int *)oldp = 1;
    127 #else
    128 		*(int *)oldp = 0;
    129 #endif
    130 		return (0);
    131 	case USER_POSIX2_FORT_DEV:
    132 #ifdef	POSIX2_FORT_DEV
    133 		*(int *)oldp = 1;
    134 #else
    135 		*(int *)oldp = 0;
    136 #endif
    137 		return (0);
    138 	case USER_POSIX2_FORT_RUN:
    139 #ifdef	POSIX2_FORT_RUN
    140 		*(int *)oldp = 1;
    141 #else
    142 		*(int *)oldp = 0;
    143 #endif
    144 		return (0);
    145 	case USER_POSIX2_LOCALEDEF:
    146 #ifdef	POSIX2_LOCALEDEF
    147 		*(int *)oldp = 1;
    148 #else
    149 		*(int *)oldp = 0;
    150 #endif
    151 		return (0);
    152 	case USER_POSIX2_SW_DEV:
    153 #ifdef	POSIX2_SW_DEV
    154 		*(int *)oldp = 1;
    155 #else
    156 		*(int *)oldp = 0;
    157 #endif
    158 		return (0);
    159 	case USER_POSIX2_UPE:
    160 #ifdef	POSIX2_UPE
    161 		*(int *)oldp = 1;
    162 #else
    163 		*(int *)oldp = 0;
    164 #endif
    165 		return (0);
    166 	case USER_STREAM_MAX:
    167 		*(int *)oldp = FOPEN_MAX;
    168 		return (0);
    169 	case USER_TZNAME_MAX:
    170 		*(int *)oldp = NAME_MAX;
    171 		return (0);
    172 	default:
    173 		errno = EINVAL;
    174 		return (-1);
    175 	}
    176 	/* NOTREACHED */
    177 }
    178