104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/* $OpenBSD: db_usrreq.c,v 1.22 2021/01/09 20:58:12 gnezdo Exp $ */
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/*
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* Copyright (c) 1996 Michael Shalayeff. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/tty.h>
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#include <sys/sysctl.h>
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#include <dev/cons.h>
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#include <ddb/db_var.h>
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int db_log = 1;
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int db_profile; /* Allow dynamic profiling */
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const struct sysctl_bounded_args ddb_vars[] = {
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{ DBCTL_RADIX, &db_radix, 8, 16 },
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{ DBCTL_MAXWIDTH, &db_max_width, 0, INT_MAX },
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{ DBCTL_TABSTOP, &db_tab_stop_width, 1, 16 },
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{ DBCTL_MAXLINE, &db_max_line, 0, INT_MAX },
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{ DBCTL_LOG, &db_log, 0, 1 },
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};
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int
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ddb_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
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size_t newlen, struct proc *p)
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{
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/* All sysctl names at this level are terminal. */
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if (namelen != 1)
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return (ENOTDIR);
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switch (name[0]) {
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case DBCTL_PANIC:
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if (securelevel > 0)
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return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
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&db_panic));
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else {
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return (sysctl_int_bounded(oldp, oldlenp, newp, newlen,
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&db_panic, 0, 1));
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}
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break;
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case DBCTL_CONSOLE:
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if (securelevel > 0)
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return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
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&db_console));
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else {
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return (sysctl_int_bounded(oldp, oldlenp, newp, newlen,
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&db_console, 0, 1));
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}
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break;
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case DBCTL_TRIGGER:
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if (newp && db_console) {
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struct process *pr = curproc->p_p;
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if (securelevel < 1 ||
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(pr->ps_flags & PS_CONTROLT && cn_tab &&
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cn_tab->cn_dev == pr->ps_session->s_ttyp->t_dev)) {
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db_enter();
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newp = NULL;
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} else
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return (ENODEV);
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}
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return (sysctl_rdint(oldp, oldlenp, newp, 0));
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#if defined(DDBPROF)
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case DBCTL_PROFILE:
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if (securelevel > 0)
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return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
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&db_profile));
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else {
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return (sysctl_int_bounded(oldp, oldlenp, newp, newlen,
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&db_profile, 0, 1));
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}
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break;
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#endif /* DDBPROF */
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default:
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return (sysctl_bounded_arr(ddb_vars, nitems(ddb_vars), name,
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namelen, oldp, oldlenp, newp, newlen));
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}
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/* NOTREACHED */
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}
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