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/* $OpenBSD: db_usrreq.c,v 1.22 2021/01/09 20:58:12 gnezdo 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 */
const struct sysctl_bounded_args ddb_vars[] = {
{ DBCTL_RADIX, &db_radix, 8, 16 },
{ DBCTL_MAXWIDTH, &db_max_width, 0, INT_MAX },
{ DBCTL_TABSTOP, &db_tab_stop_width, 1, 16 },
{ DBCTL_MAXLINE, &db_max_line, 0, INT_MAX },
{ DBCTL_LOG, &db_log, 0, 1 },
};
int
ddb_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
size_t newlen, struct proc *p)
{
/* All sysctl names at this level are terminal. */
if (namelen != 1)
return (ENOTDIR);
switch (name[0]) {
case DBCTL_PANIC:
if (securelevel > 0)
return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
&db_panic));
else {
return (sysctl_int_bounded(oldp, oldlenp, newp, newlen,
&db_panic, 0, 1));
}
break;
case DBCTL_CONSOLE:
if (securelevel > 0)
return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
&db_console));
else {
return (sysctl_int_bounded(oldp, oldlenp, newp, newlen,
&db_console, 0, 1));
}
break;
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 {
return (sysctl_int_bounded(oldp, oldlenp, newp, newlen,
&db_profile, 0, 1));
}
break;
#endif /* DDBPROF */
default:
return (sysctl_bounded_arr(ddb_vars, nitems(ddb_vars), name,
namelen, oldp, oldlenp, newp, newlen));
}
/* NOTREACHED */
}
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