sysctl.c revision 42353 
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
38#include <sys/param.h>
39#include <sys/sysctl.h>
40
41#include <errno.h>
42#include <limits.h>
43#include <paths.h>
44#include <stdio.h>
45#include <unistd.h>
46#include <string.h>
47
48int
49sysctl(name, namelen, oldp, oldlenp, newp, newlen)
50	int *name;
51	u_int namelen;
52	void *oldp, *newp;
53	size_t *oldlenp, newlen;
54{
55	if (name[0] != CTL_USER)
56		return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen));
57
58	if (newp != NULL) {
59		errno = EPERM;
60		return (-1);
61	}
62	if (namelen != 2) {
63		errno = EINVAL;
64		return (-1);
65	}
66
67	switch (name[1]) {
68	case USER_CS_PATH:
69		if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) {
70			errno = ENOMEM;
71			return -1;
72		}
73		*oldlenp = sizeof(_PATH_STDPATH);
74		if (oldp != NULL)
75			memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
76		return (0);
77	}
78
79	if (oldp && *oldlenp < sizeof(int)) {
80		errno = ENOMEM;
81		return (-1);
82	}
83	*oldlenp = sizeof(int);
84	if (oldp == NULL)
85		return (0);
86
87	switch (name[1]) {
88	case USER_BC_BASE_MAX:
89		*(int *)oldp = BC_BASE_MAX;
90		return (0);
91	case USER_BC_DIM_MAX:
92		*(int *)oldp = BC_DIM_MAX;
93		return (0);
94	case USER_BC_SCALE_MAX:
95		*(int *)oldp = BC_SCALE_MAX;
96		return (0);
97	case USER_BC_STRING_MAX:
98		*(int *)oldp = BC_STRING_MAX;
99		return (0);
100	case USER_COLL_WEIGHTS_MAX:
101		*(int *)oldp = COLL_WEIGHTS_MAX;
102		return (0);
103	case USER_EXPR_NEST_MAX:
104		*(int *)oldp = EXPR_NEST_MAX;
105		return (0);
106	case USER_LINE_MAX:
107		*(int *)oldp = LINE_MAX;
108		return (0);
109	case USER_RE_DUP_MAX:
110		*(int *)oldp = RE_DUP_MAX;
111		return (0);
112	case USER_POSIX2_VERSION:
113		*(int *)oldp = _POSIX2_VERSION;
114		return (0);
115	case USER_POSIX2_C_BIND:
116#ifdef POSIX2_C_BIND
117		*(int *)oldp = 1;
118#else
119		*(int *)oldp = 0;
120#endif
121		return (0);
122	case USER_POSIX2_C_DEV:
123#ifdef	POSIX2_C_DEV
124		*(int *)oldp = 1;
125#else
126		*(int *)oldp = 0;
127#endif
128		return (0);
129	case USER_POSIX2_CHAR_TERM:
130#ifdef	POSIX2_CHAR_TERM
131		*(int *)oldp = 1;
132#else
133		*(int *)oldp = 0;
134#endif
135		return (0);
136	case USER_POSIX2_FORT_DEV:
137#ifdef	POSIX2_FORT_DEV
138		*(int *)oldp = 1;
139#else
140		*(int *)oldp = 0;
141#endif
142		return (0);
143	case USER_POSIX2_FORT_RUN:
144#ifdef	POSIX2_FORT_RUN
145		*(int *)oldp = 1;
146#else
147		*(int *)oldp = 0;
148#endif
149		return (0);
150	case USER_POSIX2_LOCALEDEF:
151#ifdef	POSIX2_LOCALEDEF
152		*(int *)oldp = 1;
153#else
154		*(int *)oldp = 0;
155#endif
156		return (0);
157	case USER_POSIX2_SW_DEV:
158#ifdef	POSIX2_SW_DEV
159		*(int *)oldp = 1;
160#else
161		*(int *)oldp = 0;
162#endif
163		return (0);
164	case USER_POSIX2_UPE:
165#ifdef	POSIX2_UPE
166		*(int *)oldp = 1;
167#else
168		*(int *)oldp = 0;
169#endif
170		return (0);
171	case USER_STREAM_MAX:
172		*(int *)oldp = FOPEN_MAX;
173		return (0);
174	case USER_TZNAME_MAX:
175		*(int *)oldp = NAME_MAX;
176		return (0);
177	default:
178		errno = EINVAL;
179		return (-1);
180	}
181	/* NOTREACHED */
182}
183