sysctl.c revision 1573 
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
47int
48sysctl(name, namelen, oldp, oldlenp, newp, newlen)
49	int *name;
50	u_int namelen;
51	void *oldp, *newp;
52	size_t *oldlenp, newlen;
53{
54	if (name[0] != CTL_USER)
55		return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen));
56
57	if (newp != NULL) {
58		errno = EPERM;
59		return (-1);
60	}
61	if (namelen != 2) {
62		errno = EINVAL;
63		return (-1);
64	}
65
66	switch (name[1]) {
67	case USER_CS_PATH:
68		if (oldp && *oldlenp < sizeof(_PATH_STDPATH))
69			return (ENOMEM);
70		*oldlenp = sizeof(_PATH_STDPATH);
71		if (oldp != NULL)
72			memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
73		return (0);
74	}
75
76	if (oldp && *oldlenp < sizeof(int))
77		return (ENOMEM);
78	*oldlenp = sizeof(int);
79	if (oldp == NULL)
80		return (0);
81
82	switch (name[1]) {
83	case USER_BC_BASE_MAX:
84		*(int *)oldp = BC_BASE_MAX;
85		return (0);
86	case USER_BC_DIM_MAX:
87		*(int *)oldp = BC_DIM_MAX;
88		return (0);
89	case USER_BC_SCALE_MAX:
90		*(int *)oldp = BC_SCALE_MAX;
91		return (0);
92	case USER_BC_STRING_MAX:
93		*(int *)oldp = BC_STRING_MAX;
94		return (0);
95	case USER_COLL_WEIGHTS_MAX:
96		*(int *)oldp = COLL_WEIGHTS_MAX;
97		return (0);
98	case USER_EXPR_NEST_MAX:
99		*(int *)oldp = EXPR_NEST_MAX;
100		return (0);
101	case USER_LINE_MAX:
102		*(int *)oldp = LINE_MAX;
103		return (0);
104	case USER_RE_DUP_MAX:
105		*(int *)oldp = RE_DUP_MAX;
106		return (0);
107	case USER_POSIX2_VERSION:
108		*(int *)oldp = _POSIX2_VERSION;
109		return (0);
110	case USER_POSIX2_C_BIND:
111#ifdef POSIX2_C_BIND
112		*(int *)oldp = 1;
113#else
114		*(int *)oldp = 0;
115#endif
116		return (0);
117	case USER_POSIX2_C_DEV:
118#ifdef	POSIX2_C_DEV
119		*(int *)oldp = 1;
120#else
121		*(int *)oldp = 0;
122#endif
123		return (0);
124	case USER_POSIX2_CHAR_TERM:
125#ifdef	POSIX2_CHAR_TERM
126		*(int *)oldp = 1;
127#else
128		*(int *)oldp = 0;
129#endif
130		return (0);
131	case USER_POSIX2_FORT_DEV:
132#ifdef	POSIX2_FORT_DEV
133		*(int *)oldp = 1;
134#else
135		*(int *)oldp = 0;
136#endif
137		return (0);
138	case USER_POSIX2_FORT_RUN:
139#ifdef	POSIX2_FORT_RUN
140		*(int *)oldp = 1;
141#else
142		*(int *)oldp = 0;
143#endif
144		return (0);
145	case USER_POSIX2_LOCALEDEF:
146#ifdef	POSIX2_LOCALEDEF
147		*(int *)oldp = 1;
148#else
149		*(int *)oldp = 0;
150#endif
151		return (0);
152	case USER_POSIX2_SW_DEV:
153#ifdef	POSIX2_SW_DEV
154		*(int *)oldp = 1;
155#else
156		*(int *)oldp = 0;
157#endif
158		return (0);
159	case USER_POSIX2_UPE:
160#ifdef	POSIX2_UPE
161		*(int *)oldp = 1;
162#else
163		*(int *)oldp = 0;
164#endif
165		return (0);
166	case USER_STREAM_MAX:
167		*(int *)oldp = FOPEN_MAX;
168		return (0);
169	case USER_TZNAME_MAX:
170		*(int *)oldp = NAME_MAX;
171		return (0);
172	default:
173		errno = EINVAL;
174		return (-1);
175	}
176	/* NOTREACHED */
177}
178