sysctl.c revision 111010 
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)
35static char sccsid[] = "@(#)sysctl.c	8.2 (Berkeley) 1/4/94";
36#endif /* LIBC_SCCS and not lint */
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD: head/lib/libc/gen/sysctl.c 111010 2003-02-16 17:29:11Z nectar $");
39
40#include <sys/param.h>
41#include <sys/sysctl.h>
42
43#include <errno.h>
44#include <limits.h>
45#include <paths.h>
46#include <stdio.h>
47#include <unistd.h>
48#include <string.h>
49
50extern int __sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp,
51    void *newp, size_t newlen);
52
53int
54sysctl(name, namelen, oldp, oldlenp, newp, newlen)
55	int *name;
56	u_int namelen;
57	void *oldp, *newp;
58	size_t *oldlenp, newlen;
59{
60	if (name[0] != CTL_USER)
61		return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen));
62
63	if (newp != NULL) {
64		errno = EPERM;
65		return (-1);
66	}
67	if (namelen != 2) {
68		errno = EINVAL;
69		return (-1);
70	}
71
72	switch (name[1]) {
73	case USER_CS_PATH:
74		if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) {
75			errno = ENOMEM;
76			return -1;
77		}
78		*oldlenp = sizeof(_PATH_STDPATH);
79		if (oldp != NULL)
80			memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
81		return (0);
82	}
83
84	if (oldp && *oldlenp < sizeof(int)) {
85		errno = ENOMEM;
86		return (-1);
87	}
88	*oldlenp = sizeof(int);
89	if (oldp == NULL)
90		return (0);
91
92	switch (name[1]) {
93	case USER_BC_BASE_MAX:
94		*(int *)oldp = BC_BASE_MAX;
95		return (0);
96	case USER_BC_DIM_MAX:
97		*(int *)oldp = BC_DIM_MAX;
98		return (0);
99	case USER_BC_SCALE_MAX:
100		*(int *)oldp = BC_SCALE_MAX;
101		return (0);
102	case USER_BC_STRING_MAX:
103		*(int *)oldp = BC_STRING_MAX;
104		return (0);
105	case USER_COLL_WEIGHTS_MAX:
106		*(int *)oldp = COLL_WEIGHTS_MAX;
107		return (0);
108	case USER_EXPR_NEST_MAX:
109		*(int *)oldp = EXPR_NEST_MAX;
110		return (0);
111	case USER_LINE_MAX:
112		*(int *)oldp = LINE_MAX;
113		return (0);
114	case USER_RE_DUP_MAX:
115		*(int *)oldp = RE_DUP_MAX;
116		return (0);
117	case USER_POSIX2_VERSION:
118		*(int *)oldp = _POSIX2_VERSION;
119		return (0);
120	case USER_POSIX2_C_BIND:
121#ifdef POSIX2_C_BIND
122		*(int *)oldp = 1;
123#else
124		*(int *)oldp = 0;
125#endif
126		return (0);
127	case USER_POSIX2_C_DEV:
128#ifdef	POSIX2_C_DEV
129		*(int *)oldp = 1;
130#else
131		*(int *)oldp = 0;
132#endif
133		return (0);
134	case USER_POSIX2_CHAR_TERM:
135#ifdef	POSIX2_CHAR_TERM
136		*(int *)oldp = 1;
137#else
138		*(int *)oldp = 0;
139#endif
140		return (0);
141	case USER_POSIX2_FORT_DEV:
142#ifdef	POSIX2_FORT_DEV
143		*(int *)oldp = 1;
144#else
145		*(int *)oldp = 0;
146#endif
147		return (0);
148	case USER_POSIX2_FORT_RUN:
149#ifdef	POSIX2_FORT_RUN
150		*(int *)oldp = 1;
151#else
152		*(int *)oldp = 0;
153#endif
154		return (0);
155	case USER_POSIX2_LOCALEDEF:
156#ifdef	POSIX2_LOCALEDEF
157		*(int *)oldp = 1;
158#else
159		*(int *)oldp = 0;
160#endif
161		return (0);
162	case USER_POSIX2_SW_DEV:
163#ifdef	POSIX2_SW_DEV
164		*(int *)oldp = 1;
165#else
166		*(int *)oldp = 0;
167#endif
168		return (0);
169	case USER_POSIX2_UPE:
170#ifdef	POSIX2_UPE
171		*(int *)oldp = 1;
172#else
173		*(int *)oldp = 0;
174#endif
175		return (0);
176	case USER_STREAM_MAX:
177		*(int *)oldp = FOPEN_MAX;
178		return (0);
179	case USER_TZNAME_MAX:
180		*(int *)oldp = NAME_MAX;
181		return (0);
182	default:
183		errno = EINVAL;
184		return (-1);
185	}
186	/* NOTREACHED */
187}
188