2 * SPDX-License-Identifier: BSD-3-Clause
5 * The Regents of the University of California. All rights reserved.
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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
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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32 #include <sys/cdefs.h>
33 __SCCSID("@(#)sysctl.c 8.2 (Berkeley) 1/4/94");
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/sysctl.h>
46 extern int __sysctl(const int *name, u_int namelen, void *oldp,
47 size_t *oldlenp, const void *newp, size_t newlen);
50 sysctl(const int *name, u_int namelen, void *oldp, size_t *oldlenp,
51 const void *newp, size_t newlen)
56 orig_oldlen = oldlenp ? *oldlenp : 0;
57 retval = __sysctl(name, namelen, oldp, oldlenp, newp, newlen);
59 * All valid names under CTL_USER have a dummy entry in the sysctl
60 * tree (to support name lookups and enumerations) with an
61 * empty/zero value, and the true value is supplied by this routine.
62 * For all such names, __sysctl() is used solely to validate the
65 * Return here unless there was a successful lookup for a CTL_USER
68 if (retval || name[0] != CTL_USER)
82 if (oldp == NULL && orig_oldlen < sizeof(_PATH_STDPATH)) {
86 *oldlenp = sizeof(_PATH_STDPATH);
88 memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
91 if (oldp == NULL && orig_oldlen < sizeof(_PATH_LOCALBASE)) {
95 *oldlenp = sizeof(_PATH_LOCALBASE);
97 memmove(oldp, _PATH_LOCALBASE, sizeof(_PATH_LOCALBASE));
101 if (oldp && *oldlenp < sizeof(int)) {
105 *oldlenp = sizeof(int);
110 case USER_BC_BASE_MAX:
111 *(int *)oldp = BC_BASE_MAX;
113 case USER_BC_DIM_MAX:
114 *(int *)oldp = BC_DIM_MAX;
116 case USER_BC_SCALE_MAX:
117 *(int *)oldp = BC_SCALE_MAX;
119 case USER_BC_STRING_MAX:
120 *(int *)oldp = BC_STRING_MAX;
122 case USER_COLL_WEIGHTS_MAX:
123 *(int *)oldp = COLL_WEIGHTS_MAX;
125 case USER_EXPR_NEST_MAX:
126 *(int *)oldp = EXPR_NEST_MAX;
129 *(int *)oldp = LINE_MAX;
131 case USER_RE_DUP_MAX:
132 *(int *)oldp = RE_DUP_MAX;
134 case USER_POSIX2_VERSION:
135 *(int *)oldp = _POSIX2_VERSION;
137 case USER_POSIX2_C_BIND:
144 case USER_POSIX2_C_DEV:
151 case USER_POSIX2_CHAR_TERM:
152 #ifdef POSIX2_CHAR_TERM
158 case USER_POSIX2_FORT_DEV:
159 #ifdef POSIX2_FORT_DEV
165 case USER_POSIX2_FORT_RUN:
166 #ifdef POSIX2_FORT_RUN
172 case USER_POSIX2_LOCALEDEF:
173 #ifdef POSIX2_LOCALEDEF
179 case USER_POSIX2_SW_DEV:
186 case USER_POSIX2_UPE:
193 case USER_STREAM_MAX:
194 *(int *)oldp = FOPEN_MAX;
196 case USER_TZNAME_MAX:
197 *(int *)oldp = NAME_MAX;