2 * SPDX-License-Identifier: BSD-3-Clause
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char sccsid[] = "@(#)sysctl.c 8.2 (Berkeley) 1/4/94";
34 #endif /* LIBC_SCCS and not lint */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <sys/param.h>
39 #include <sys/sysctl.h>
48 extern int __sysctl(const int *name, u_int namelen, void *oldp,
49 size_t *oldlenp, const void *newp, size_t newlen);
52 sysctl(const int *name, u_int namelen, void *oldp, size_t *oldlenp,
53 const void *newp, size_t newlen)
58 orig_oldlen = oldlenp ? *oldlenp : 0;
59 retval = __sysctl(name, namelen, oldp, oldlenp, newp, newlen);
61 * All valid names under CTL_USER have a dummy entry in the sysctl
62 * tree (to support name lookups and enumerations) with an
63 * empty/zero value, and the true value is supplied by this routine.
64 * For all such names, __sysctl() is used solely to validate the
67 * Return here unless there was a successful lookup for a CTL_USER
70 if (retval || name[0] != CTL_USER)
84 if (oldp && orig_oldlen < sizeof(_PATH_STDPATH)) {
88 *oldlenp = sizeof(_PATH_STDPATH);
90 memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
94 if (oldp && *oldlenp < sizeof(int)) {
98 *oldlenp = sizeof(int);
103 case USER_BC_BASE_MAX:
104 *(int *)oldp = BC_BASE_MAX;
106 case USER_BC_DIM_MAX:
107 *(int *)oldp = BC_DIM_MAX;
109 case USER_BC_SCALE_MAX:
110 *(int *)oldp = BC_SCALE_MAX;
112 case USER_BC_STRING_MAX:
113 *(int *)oldp = BC_STRING_MAX;
115 case USER_COLL_WEIGHTS_MAX:
116 *(int *)oldp = COLL_WEIGHTS_MAX;
118 case USER_EXPR_NEST_MAX:
119 *(int *)oldp = EXPR_NEST_MAX;
122 *(int *)oldp = LINE_MAX;
124 case USER_RE_DUP_MAX:
125 *(int *)oldp = RE_DUP_MAX;
127 case USER_POSIX2_VERSION:
128 *(int *)oldp = _POSIX2_VERSION;
130 case USER_POSIX2_C_BIND:
137 case USER_POSIX2_C_DEV:
144 case USER_POSIX2_CHAR_TERM:
145 #ifdef POSIX2_CHAR_TERM
151 case USER_POSIX2_FORT_DEV:
152 #ifdef POSIX2_FORT_DEV
158 case USER_POSIX2_FORT_RUN:
159 #ifdef POSIX2_FORT_RUN
165 case USER_POSIX2_LOCALEDEF:
166 #ifdef POSIX2_LOCALEDEF
172 case USER_POSIX2_SW_DEV:
179 case USER_POSIX2_UPE:
186 case USER_STREAM_MAX:
187 *(int *)oldp = FOPEN_MAX;
189 case USER_TZNAME_MAX:
190 *(int *)oldp = NAME_MAX;