sysctl.c revision 92986 
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 92986 2002-03-22 21:53:29Z obrien $");
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
50int
51sysctl(name, namelen, oldp, oldlenp, newp, newlen)
52	int *name;
53	u_int namelen;
54	void *oldp, *newp;
55	size_t *oldlenp, newlen;
56{
57	if (name[0] != CTL_USER)
58		return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen));
59
60	if (newp != NULL) {
61		errno = EPERM;
62		return (-1);
63	}
64	if (namelen != 2) {
65		errno = EINVAL;
66		return (-1);
67	}
68
69	switch (name[1]) {
70	case USER_CS_PATH:
71		if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) {
72			errno = ENOMEM;
73			return -1;
74		}
75		*oldlenp = sizeof(_PATH_STDPATH);
76		if (oldp != NULL)
77			memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
78		return (0);
79	}
80
81	if (oldp && *oldlenp < sizeof(int)) {
82		errno = ENOMEM;
83		return (-1);
84	}
85	*oldlenp = sizeof(int);
86	if (oldp == NULL)
87		return (0);
88
89	switch (name[1]) {
90	case USER_BC_BASE_MAX:
91		*(int *)oldp = BC_BASE_MAX;
92		return (0);
93	case USER_BC_DIM_MAX:
94		*(int *)oldp = BC_DIM_MAX;
95		return (0);
96	case USER_BC_SCALE_MAX:
97		*(int *)oldp = BC_SCALE_MAX;
98		return (0);
99	case USER_BC_STRING_MAX:
100		*(int *)oldp = BC_STRING_MAX;
101		return (0);
102	case USER_COLL_WEIGHTS_MAX:
103		*(int *)oldp = COLL_WEIGHTS_MAX;
104		return (0);
105	case USER_EXPR_NEST_MAX:
106		*(int *)oldp = EXPR_NEST_MAX;
107		return (0);
108	case USER_LINE_MAX:
109		*(int *)oldp = LINE_MAX;
110		return (0);
111	case USER_RE_DUP_MAX:
112		*(int *)oldp = RE_DUP_MAX;
113		return (0);
114	case USER_POSIX2_VERSION:
115		*(int *)oldp = _POSIX2_VERSION;
116		return (0);
117	case USER_POSIX2_C_BIND:
118#ifdef POSIX2_C_BIND
119		*(int *)oldp = 1;
120#else
121		*(int *)oldp = 0;
122#endif
123		return (0);
124	case USER_POSIX2_C_DEV:
125#ifdef	POSIX2_C_DEV
126		*(int *)oldp = 1;
127#else
128		*(int *)oldp = 0;
129#endif
130		return (0);
131	case USER_POSIX2_CHAR_TERM:
132#ifdef	POSIX2_CHAR_TERM
133		*(int *)oldp = 1;
134#else
135		*(int *)oldp = 0;
136#endif
137		return (0);
138	case USER_POSIX2_FORT_DEV:
139#ifdef	POSIX2_FORT_DEV
140		*(int *)oldp = 1;
141#else
142		*(int *)oldp = 0;
143#endif
144		return (0);
145	case USER_POSIX2_FORT_RUN:
146#ifdef	POSIX2_FORT_RUN
147		*(int *)oldp = 1;
148#else
149		*(int *)oldp = 0;
150#endif
151		return (0);
152	case USER_POSIX2_LOCALEDEF:
153#ifdef	POSIX2_LOCALEDEF
154		*(int *)oldp = 1;
155#else
156		*(int *)oldp = 0;
157#endif
158		return (0);
159	case USER_POSIX2_SW_DEV:
160#ifdef	POSIX2_SW_DEV
161		*(int *)oldp = 1;
162#else
163		*(int *)oldp = 0;
164#endif
165		return (0);
166	case USER_POSIX2_UPE:
167#ifdef	POSIX2_UPE
168		*(int *)oldp = 1;
169#else
170		*(int *)oldp = 0;
171#endif
172		return (0);
173	case USER_STREAM_MAX:
174		*(int *)oldp = FOPEN_MAX;
175		return (0);
176	case USER_TZNAME_MAX:
177		*(int *)oldp = NAME_MAX;
178		return (0);
179	default:
180		errno = EINVAL;
181		return (-1);
182	}
183	/* NOTREACHED */
184}
185