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/* $OpenBSD: db_usrreq.c,v 1.20 2017/09/08 05:36:52 deraadt Exp $ */
/*
* Copyright (c) 1996 Michael Shalayeff. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <sys/sysctl.h>
#include <dev/cons.h>
#include <ddb/db_var.h>
int db_log = 1;
int db_profile; /* Allow dynamic profiling */
int
ddb_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
size_t newlen, struct proc *p)
{
int error, ctlval;
/* All sysctl names at this level are terminal. */
if (namelen != 1)
return (ENOTDIR);
switch (name[0]) {
case DBCTL_RADIX:
return sysctl_int(oldp, oldlenp, newp, newlen, &db_radix);
case DBCTL_MAXWIDTH:
return sysctl_int(oldp, oldlenp, newp, newlen, &db_max_width);
case DBCTL_TABSTOP:
return sysctl_int(oldp, oldlenp, newp, newlen, &db_tab_stop_width);
case DBCTL_MAXLINE:
return sysctl_int(oldp, oldlenp, newp, newlen, &db_max_line);
case DBCTL_PANIC:
if (securelevel > 0)
return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
&db_panic));
else {
ctlval = db_panic;
if ((error = sysctl_int(oldp, oldlenp, newp, newlen,
&ctlval)) || newp == NULL)
return (error);
if (ctlval != 1 && ctlval != 0)
return (EINVAL);
db_panic = ctlval;
return (0);
}
break;
case DBCTL_CONSOLE:
if (securelevel > 0)
return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
&db_console));
else {
ctlval = db_console;
if ((error = sysctl_int(oldp, oldlenp, newp, newlen,
&ctlval)) || newp == NULL)
return (error);
if (ctlval != 1 && ctlval != 0)
return (EINVAL);
db_console = ctlval;
return (0);
}
break;
case DBCTL_LOG:
return (sysctl_int(oldp, oldlenp, newp, newlen, &db_log));
case DBCTL_TRIGGER:
if (newp && db_console) {
struct process *pr = curproc->p_p;
if (securelevel < 1 ||
(pr->ps_flags & PS_CONTROLT && cn_tab &&
cn_tab->cn_dev == pr->ps_session->s_ttyp->t_dev)) {
db_enter();
newp = NULL;
} else
return (ENODEV);
}
return (sysctl_rdint(oldp, oldlenp, newp, 0));
#if defined(DDBPROF)
case DBCTL_PROFILE:
if (securelevel > 0)
return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
&db_profile));
else {
ctlval = db_profile;
if ((error = sysctl_int(oldp, oldlenp, newp, newlen,
&ctlval)) || newp == NULL)
return (error);
if (ctlval != 1 && ctlval != 0)
return (EINVAL);
db_profile = ctlval;
return (0);
}
break;
#endif /* DDBPROF */
default:
return (EOPNOTSUPP);
}
/* NOTREACHED */
}
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