sysctl.c revision 1.7 
1/*	$NetBSD: sysctl.c,v 1.7 1998/11/13 12:31:53 christos 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#include <sys/cdefs.h>
37#if defined(LIBC_SCCS) && !defined(lint)
38#if 0
39static char sccsid[] = "@(#)sysctl.c	8.2 (Berkeley) 1/4/94";
40#else
41__RCSID("$NetBSD: sysctl.c,v 1.7 1998/11/13 12:31:53 christos Exp $");
42#endif
43#endif /* LIBC_SCCS and not lint */
44
45#include "namespace.h"
46#include <sys/param.h>
47#include <sys/sysctl.h>
48
49#include <errno.h>
50#include <limits.h>
51#include <paths.h>
52#include <stdio.h>
53#include <string.h>
54#include <unistd.h>
55#include "extern.h"
56
57#ifdef __weak_alias
58__weak_alias(sysctl,_sysctl);
59#endif
60
61int
62sysctl(name, namelen, oldp, oldlenp, newp, newlen)
63	int *name;
64	size_t namelen;
65	void *oldp;
66	const void *newp;
67	size_t *oldlenp, newlen;
68{
69	if (name[0] != CTL_USER)
70		/* LINTED will fix when sysctl interface gets corrected */
71		return (__sysctl(name, namelen, oldp, oldlenp, (void *)newp, newlen));
72
73	if (newp != NULL) {
74		errno = EPERM;
75		return (-1);
76	}
77	if (namelen != 2) {
78		errno = EINVAL;
79		return (-1);
80	}
81
82	switch (name[1]) {
83	case USER_CS_PATH:
84		if (oldp && *oldlenp < sizeof(_PATH_STDPATH))
85			return (ENOMEM);
86		*oldlenp = sizeof(_PATH_STDPATH);
87		if (oldp != NULL)
88			memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
89		return (0);
90	}
91
92	if (oldp && *oldlenp < sizeof(int))
93		return (ENOMEM);
94	*oldlenp = sizeof(int);
95	if (oldp == NULL)
96		return (0);
97
98	switch (name[1]) {
99	case USER_BC_BASE_MAX:
100		*(int *)oldp = BC_BASE_MAX;
101		return (0);
102	case USER_BC_DIM_MAX:
103		*(int *)oldp = BC_DIM_MAX;
104		return (0);
105	case USER_BC_SCALE_MAX:
106		*(int *)oldp = BC_SCALE_MAX;
107		return (0);
108	case USER_BC_STRING_MAX:
109		*(int *)oldp = BC_STRING_MAX;
110		return (0);
111	case USER_COLL_WEIGHTS_MAX:
112		*(int *)oldp = COLL_WEIGHTS_MAX;
113		return (0);
114	case USER_EXPR_NEST_MAX:
115		*(int *)oldp = EXPR_NEST_MAX;
116		return (0);
117	case USER_LINE_MAX:
118		*(int *)oldp = LINE_MAX;
119		return (0);
120	case USER_RE_DUP_MAX:
121		*(int *)oldp = RE_DUP_MAX;
122		return (0);
123	case USER_POSIX2_VERSION:
124		*(int *)oldp = _POSIX2_VERSION;
125		return (0);
126	case USER_POSIX2_C_BIND:
127#ifdef POSIX2_C_BIND
128		*(int *)oldp = 1;
129#else
130		*(int *)oldp = 0;
131#endif
132		return (0);
133	case USER_POSIX2_C_DEV:
134#ifdef	POSIX2_C_DEV
135		*(int *)oldp = 1;
136#else
137		*(int *)oldp = 0;
138#endif
139		return (0);
140	case USER_POSIX2_CHAR_TERM:
141#ifdef	POSIX2_CHAR_TERM
142		*(int *)oldp = 1;
143#else
144		*(int *)oldp = 0;
145#endif
146		return (0);
147	case USER_POSIX2_FORT_DEV:
148#ifdef	POSIX2_FORT_DEV
149		*(int *)oldp = 1;
150#else
151		*(int *)oldp = 0;
152#endif
153		return (0);
154	case USER_POSIX2_FORT_RUN:
155#ifdef	POSIX2_FORT_RUN
156		*(int *)oldp = 1;
157#else
158		*(int *)oldp = 0;
159#endif
160		return (0);
161	case USER_POSIX2_LOCALEDEF:
162#ifdef	POSIX2_LOCALEDEF
163		*(int *)oldp = 1;
164#else
165		*(int *)oldp = 0;
166#endif
167		return (0);
168	case USER_POSIX2_SW_DEV:
169#ifdef	POSIX2_SW_DEV
170		*(int *)oldp = 1;
171#else
172		*(int *)oldp = 0;
173#endif
174		return (0);
175	case USER_POSIX2_UPE:
176#ifdef	POSIX2_UPE
177		*(int *)oldp = 1;
178#else
179		*(int *)oldp = 0;
180#endif
181		return (0);
182	case USER_STREAM_MAX:
183		*(int *)oldp = FOPEN_MAX;
184		return (0);
185	case USER_TZNAME_MAX:
186		*(int *)oldp = NAME_MAX;
187		return (0);
188	default:
189		errno = EINVAL;
190		return (-1);
191	}
192	/* NOTREACHED */
193}
194