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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static char sccsid[] = "@(#)sysctl.c	8.2 (Berkeley) 1/4/94";
32#endif /* LIBC_SCCS and not lint */
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#include <sys/param.h>
37#include <sys/sysctl.h>
38
39#include <errno.h>
40#include <limits.h>
41#include <paths.h>
42#include <stdio.h>
43#include <unistd.h>
44#include <string.h>
45
46extern int __sysctl(const int *name, u_int namelen, void *oldp,
47    size_t *oldlenp, const void *newp, size_t newlen);
48
49int
50sysctl(const int *name, u_int namelen, void *oldp, size_t *oldlenp,
51    const void *newp, size_t newlen)
52{
53	int retval;
54
55	retval = __sysctl(name, namelen, oldp, oldlenp, newp, newlen);
56	if (retval != -1 || errno != ENOENT || name[0] != CTL_USER)
57		return (retval);
58
59	if (newp != NULL) {
60		errno = EPERM;
61		return (-1);
62	}
63	if (namelen != 2) {
64		errno = EINVAL;
65		return (-1);
66	}
67
68	switch (name[1]) {
69	case USER_CS_PATH:
70		if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) {
71			errno = ENOMEM;
72			return -1;
73		}
74		*oldlenp = sizeof(_PATH_STDPATH);
75		if (oldp != NULL)
76			memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
77		return (0);
78	}
79
80	if (oldp && *oldlenp < sizeof(int)) {
81		errno = ENOMEM;
82		return (-1);
83	}
84	*oldlenp = sizeof(int);
85	if (oldp == NULL)
86		return (0);
87
88	switch (name[1]) {
89	case USER_BC_BASE_MAX:
90		*(int *)oldp = BC_BASE_MAX;
91		return (0);
92	case USER_BC_DIM_MAX:
93		*(int *)oldp = BC_DIM_MAX;
94		return (0);
95	case USER_BC_SCALE_MAX:
96		*(int *)oldp = BC_SCALE_MAX;
97		return (0);
98	case USER_BC_STRING_MAX:
99		*(int *)oldp = BC_STRING_MAX;
100		return (0);
101	case USER_COLL_WEIGHTS_MAX:
102		*(int *)oldp = COLL_WEIGHTS_MAX;
103		return (0);
104	case USER_EXPR_NEST_MAX:
105		*(int *)oldp = EXPR_NEST_MAX;
106		return (0);
107	case USER_LINE_MAX:
108		*(int *)oldp = LINE_MAX;
109		return (0);
110	case USER_RE_DUP_MAX:
111		*(int *)oldp = RE_DUP_MAX;
112		return (0);
113	case USER_POSIX2_VERSION:
114		*(int *)oldp = _POSIX2_VERSION;
115		return (0);
116	case USER_POSIX2_C_BIND:
117#ifdef POSIX2_C_BIND
118		*(int *)oldp = 1;
119#else
120		*(int *)oldp = 0;
121#endif
122		return (0);
123	case USER_POSIX2_C_DEV:
124#ifdef	POSIX2_C_DEV
125		*(int *)oldp = 1;
126#else
127		*(int *)oldp = 0;
128#endif
129		return (0);
130	case USER_POSIX2_CHAR_TERM:
131#ifdef	POSIX2_CHAR_TERM
132		*(int *)oldp = 1;
133#else
134		*(int *)oldp = 0;
135#endif
136		return (0);
137	case USER_POSIX2_FORT_DEV:
138#ifdef	POSIX2_FORT_DEV
139		*(int *)oldp = 1;
140#else
141		*(int *)oldp = 0;
142#endif
143		return (0);
144	case USER_POSIX2_FORT_RUN:
145#ifdef	POSIX2_FORT_RUN
146		*(int *)oldp = 1;
147#else
148		*(int *)oldp = 0;
149#endif
150		return (0);
151	case USER_POSIX2_LOCALEDEF:
152#ifdef	POSIX2_LOCALEDEF
153		*(int *)oldp = 1;
154#else
155		*(int *)oldp = 0;
156#endif
157		return (0);
158	case USER_POSIX2_SW_DEV:
159#ifdef	POSIX2_SW_DEV
160		*(int *)oldp = 1;
161#else
162		*(int *)oldp = 0;
163#endif
164		return (0);
165	case USER_POSIX2_UPE:
166#ifdef	POSIX2_UPE
167		*(int *)oldp = 1;
168#else
169		*(int *)oldp = 0;
170#endif
171		return (0);
172	case USER_STREAM_MAX:
173		*(int *)oldp = FOPEN_MAX;
174		return (0);
175	case USER_TZNAME_MAX:
176		*(int *)oldp = NAME_MAX;
177		return (0);
178	default:
179		errno = EINVAL;
180		return (-1);
181	}
182	/* NOTREACHED */
183}
184