db_usrreq.c revision 1.4 
1/*	$OpenBSD: db_usrreq.c,v 1.4 2000/02/27 04:57:29 hugh Exp $	*/
2
3/*
4 * Copyright (c) 1996 Michael Shalayeff.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by Michael Shalayeff.
17 * 4. The name of the author may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/param.h>
33#include <sys/types.h>
34#include <sys/kernel.h>
35#include <sys/proc.h>
36#include <vm/vm.h>
37#include <sys/sysctl.h>
38
39#include <ddb/db_var.h>
40
41extern int securelevel;
42
43int
44ddb_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
45	int	*name;
46	u_int	namelen;
47	void	*oldp;
48	size_t	*oldlenp;
49	void	*newp;
50	size_t	newlen;
51	struct proc *p;
52{
53	int error, ctlval;
54
55	/* All sysctl names at this level are terminal. */
56	if (namelen != 1)
57		return (ENOTDIR);
58
59	switch (name[0]) {
60
61	case DBCTL_RADIX:
62		return sysctl_int(oldp, oldlenp, newp, newlen, &db_radix);
63	case DBCTL_MAXWIDTH:
64		return sysctl_int(oldp, oldlenp, newp, newlen, &db_max_width);
65	case DBCTL_TABSTOP:
66		return sysctl_int(oldp, oldlenp, newp, newlen, &db_tab_stop_width);
67	case DBCTL_MAXLINE:
68		return sysctl_int(oldp, oldlenp, newp, newlen, &db_max_line);
69	case DBCTL_PANIC:
70		ctlval = db_panic;
71		if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &ctlval)) ||
72		    newp == NULL)
73			return (error);
74		if (ctlval != 1 && ctlval != 0)
75			return (EINVAL);
76		if (ctlval > db_panic && securelevel > 1)
77			return (EPERM);
78		db_panic = ctlval;
79		return (0);
80	case DBCTL_CONSOLE:
81		ctlval = db_console;
82		if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &ctlval)) ||
83		    newp == NULL)
84			return (error);
85		if (ctlval != 1 && ctlval != 0)
86			return (EINVAL);
87		if (ctlval > db_console && securelevel > 1)
88			return (EPERM);
89		db_console = ctlval;
90		return (0);
91	default:
92		return (EOPNOTSUPP);
93	}
94	/* NOTREACHED */
95}
96