db_usrreq.c revision 1.6 
1/*	$OpenBSD: db_usrreq.c,v 1.6 2002/07/01 21:56:55 miod 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 <uvm/uvm_extern.h>
37#include <sys/sysctl.h>
38
39#include <ddb/db_var.h>
40
41int
42ddb_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
43	int	*name;
44	u_int	namelen;
45	void	*oldp;
46	size_t	*oldlenp;
47	void	*newp;
48	size_t	newlen;
49	struct proc *p;
50{
51	int error, ctlval;
52
53	/* All sysctl names at this level are terminal. */
54	if (namelen != 1)
55		return (ENOTDIR);
56
57	switch (name[0]) {
58
59	case DBCTL_RADIX:
60		return sysctl_int(oldp, oldlenp, newp, newlen, &db_radix);
61	case DBCTL_MAXWIDTH:
62		return sysctl_int(oldp, oldlenp, newp, newlen, &db_max_width);
63	case DBCTL_TABSTOP:
64		return sysctl_int(oldp, oldlenp, newp, newlen, &db_tab_stop_width);
65	case DBCTL_MAXLINE:
66		return sysctl_int(oldp, oldlenp, newp, newlen, &db_max_line);
67	case DBCTL_PANIC:
68		ctlval = db_panic;
69		if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &ctlval)) ||
70		    newp == NULL)
71			return (error);
72		if (ctlval != 1 && ctlval != 0)
73			return (EINVAL);
74		if (ctlval > db_panic && securelevel > 1)
75			return (EPERM);
76		db_panic = ctlval;
77		return (0);
78	case DBCTL_CONSOLE:
79		ctlval = db_console;
80		if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &ctlval)) ||
81		    newp == NULL)
82			return (error);
83		if (ctlval != 1 && ctlval != 0)
84			return (EINVAL);
85		if (ctlval > db_console && securelevel > 1)
86			return (EPERM);
87		db_console = ctlval;
88		return (0);
89	default:
90		return (EOPNOTSUPP);
91	}
92	/* NOTREACHED */
93}
94