sysctl.c revision 111010
11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * Redistribution and use in source and binary forms, with or without 61573Srgrimes * modification, are permitted provided that the following conditions 71573Srgrimes * are met: 81573Srgrimes * 1. Redistributions of source code must retain the above copyright 91573Srgrimes * notice, this list of conditions and the following disclaimer. 101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111573Srgrimes * notice, this list of conditions and the following disclaimer in the 121573Srgrimes * documentation and/or other materials provided with the distribution. 131573Srgrimes * 3. All advertising materials mentioning features or use of this software 141573Srgrimes * must display the following acknowledgement: 151573Srgrimes * This product includes software developed by the University of 161573Srgrimes * California, Berkeley and its contributors. 171573Srgrimes * 4. Neither the name of the University nor the names of its contributors 181573Srgrimes * may be used to endorse or promote products derived from this software 191573Srgrimes * without specific prior written permission. 201573Srgrimes * 211573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311573Srgrimes * SUCH DAMAGE. 321573Srgrimes */ 331573Srgrimes 341573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 351573Srgrimesstatic char sccsid[] = "@(#)sysctl.c 8.2 (Berkeley) 1/4/94"; 361573Srgrimes#endif /* LIBC_SCCS and not lint */ 3792986Sobrien#include <sys/cdefs.h> 3892986Sobrien__FBSDID("$FreeBSD: head/lib/libc/gen/sysctl.c 111010 2003-02-16 17:29:11Z nectar $"); 391573Srgrimes 401573Srgrimes#include <sys/param.h> 411573Srgrimes#include <sys/sysctl.h> 421573Srgrimes 431573Srgrimes#include <errno.h> 441573Srgrimes#include <limits.h> 451573Srgrimes#include <paths.h> 461573Srgrimes#include <stdio.h> 471573Srgrimes#include <unistd.h> 4811659Sphk#include <string.h> 491573Srgrimes 50111010Snectarextern int __sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 51111010Snectar void *newp, size_t newlen); 52111010Snectar 531573Srgrimesint 541573Srgrimessysctl(name, namelen, oldp, oldlenp, newp, newlen) 551573Srgrimes int *name; 561573Srgrimes u_int namelen; 571573Srgrimes void *oldp, *newp; 581573Srgrimes size_t *oldlenp, newlen; 591573Srgrimes{ 601573Srgrimes if (name[0] != CTL_USER) 611573Srgrimes return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen)); 621573Srgrimes 631573Srgrimes if (newp != NULL) { 641573Srgrimes errno = EPERM; 651573Srgrimes return (-1); 661573Srgrimes } 671573Srgrimes if (namelen != 2) { 681573Srgrimes errno = EINVAL; 691573Srgrimes return (-1); 701573Srgrimes } 711573Srgrimes 721573Srgrimes switch (name[1]) { 731573Srgrimes case USER_CS_PATH: 7442353Sdes if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) { 7542353Sdes errno = ENOMEM; 7642353Sdes return -1; 7742353Sdes } 781573Srgrimes *oldlenp = sizeof(_PATH_STDPATH); 791573Srgrimes if (oldp != NULL) 801573Srgrimes memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH)); 811573Srgrimes return (0); 821573Srgrimes } 831573Srgrimes 8442353Sdes if (oldp && *oldlenp < sizeof(int)) { 8542353Sdes errno = ENOMEM; 8642353Sdes return (-1); 8742353Sdes } 881573Srgrimes *oldlenp = sizeof(int); 891573Srgrimes if (oldp == NULL) 901573Srgrimes return (0); 911573Srgrimes 921573Srgrimes switch (name[1]) { 931573Srgrimes case USER_BC_BASE_MAX: 941573Srgrimes *(int *)oldp = BC_BASE_MAX; 951573Srgrimes return (0); 961573Srgrimes case USER_BC_DIM_MAX: 971573Srgrimes *(int *)oldp = BC_DIM_MAX; 981573Srgrimes return (0); 991573Srgrimes case USER_BC_SCALE_MAX: 1001573Srgrimes *(int *)oldp = BC_SCALE_MAX; 1011573Srgrimes return (0); 1021573Srgrimes case USER_BC_STRING_MAX: 1031573Srgrimes *(int *)oldp = BC_STRING_MAX; 1041573Srgrimes return (0); 1051573Srgrimes case USER_COLL_WEIGHTS_MAX: 1061573Srgrimes *(int *)oldp = COLL_WEIGHTS_MAX; 1071573Srgrimes return (0); 1081573Srgrimes case USER_EXPR_NEST_MAX: 1091573Srgrimes *(int *)oldp = EXPR_NEST_MAX; 1101573Srgrimes return (0); 1111573Srgrimes case USER_LINE_MAX: 1121573Srgrimes *(int *)oldp = LINE_MAX; 1131573Srgrimes return (0); 1141573Srgrimes case USER_RE_DUP_MAX: 1151573Srgrimes *(int *)oldp = RE_DUP_MAX; 1161573Srgrimes return (0); 1171573Srgrimes case USER_POSIX2_VERSION: 1181573Srgrimes *(int *)oldp = _POSIX2_VERSION; 1191573Srgrimes return (0); 1201573Srgrimes case USER_POSIX2_C_BIND: 1211573Srgrimes#ifdef POSIX2_C_BIND 1221573Srgrimes *(int *)oldp = 1; 1231573Srgrimes#else 1241573Srgrimes *(int *)oldp = 0; 1251573Srgrimes#endif 1261573Srgrimes return (0); 1271573Srgrimes case USER_POSIX2_C_DEV: 1281573Srgrimes#ifdef POSIX2_C_DEV 1291573Srgrimes *(int *)oldp = 1; 1301573Srgrimes#else 1311573Srgrimes *(int *)oldp = 0; 1321573Srgrimes#endif 1331573Srgrimes return (0); 1341573Srgrimes case USER_POSIX2_CHAR_TERM: 1351573Srgrimes#ifdef POSIX2_CHAR_TERM 1361573Srgrimes *(int *)oldp = 1; 1371573Srgrimes#else 1381573Srgrimes *(int *)oldp = 0; 1391573Srgrimes#endif 1401573Srgrimes return (0); 1411573Srgrimes case USER_POSIX2_FORT_DEV: 1421573Srgrimes#ifdef POSIX2_FORT_DEV 1431573Srgrimes *(int *)oldp = 1; 1441573Srgrimes#else 1451573Srgrimes *(int *)oldp = 0; 1461573Srgrimes#endif 1471573Srgrimes return (0); 1481573Srgrimes case USER_POSIX2_FORT_RUN: 1491573Srgrimes#ifdef POSIX2_FORT_RUN 1501573Srgrimes *(int *)oldp = 1; 1511573Srgrimes#else 1521573Srgrimes *(int *)oldp = 0; 1531573Srgrimes#endif 1541573Srgrimes return (0); 1551573Srgrimes case USER_POSIX2_LOCALEDEF: 1561573Srgrimes#ifdef POSIX2_LOCALEDEF 1571573Srgrimes *(int *)oldp = 1; 1581573Srgrimes#else 1591573Srgrimes *(int *)oldp = 0; 1601573Srgrimes#endif 1611573Srgrimes return (0); 1621573Srgrimes case USER_POSIX2_SW_DEV: 1631573Srgrimes#ifdef POSIX2_SW_DEV 1641573Srgrimes *(int *)oldp = 1; 1651573Srgrimes#else 1661573Srgrimes *(int *)oldp = 0; 1671573Srgrimes#endif 1681573Srgrimes return (0); 1691573Srgrimes case USER_POSIX2_UPE: 1701573Srgrimes#ifdef POSIX2_UPE 1711573Srgrimes *(int *)oldp = 1; 1721573Srgrimes#else 1731573Srgrimes *(int *)oldp = 0; 1741573Srgrimes#endif 1751573Srgrimes return (0); 1761573Srgrimes case USER_STREAM_MAX: 1771573Srgrimes *(int *)oldp = FOPEN_MAX; 1781573Srgrimes return (0); 1791573Srgrimes case USER_TZNAME_MAX: 1801573Srgrimes *(int *)oldp = NAME_MAX; 1811573Srgrimes return (0); 1821573Srgrimes default: 1831573Srgrimes errno = EINVAL; 1841573Srgrimes return (-1); 1851573Srgrimes } 1861573Srgrimes /* NOTREACHED */ 1871573Srgrimes} 188