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19e9205a23
install custom pager functions didn't actually happen in practice (they all just used the simple pager and passed in a local quit pointer). So, just hardcode the simple pager as the only pager and make it set a global db_pager_quit flag that db commands can check when the user hits 'q' (or a suitable variant) at the pager prompt. Also, now that it's easy to do so, enable paging by default for all ddb commands. Any command that wishes to honor the quit flag can do so by checking db_pager_quit. Note that the pager can also be effectively disabled by setting $lines to 0. Other fixes: - 'show idt' on i386 and pc98 now actually checks the quit flag and terminates early. - 'show intr' now actually checks the quit flag and terminates early.
987 lines
21 KiB
C
987 lines
21 KiB
C
/*-
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* Copyright (c) 1986, 1988, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ddb.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/lock.h>
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#include <sys/kdb.h>
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#include <sys/mutex.h>
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#include <sys/sx.h>
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#include <sys/kernel.h>
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#include <sys/msgbuf.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/stddef.h>
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#include <sys/sysctl.h>
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#include <sys/tty.h>
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#include <sys/syslog.h>
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#include <sys/cons.h>
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#include <sys/uio.h>
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#include <sys/ctype.h>
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#ifdef DDB
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#include <ddb/ddb.h>
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#endif
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/*
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* Note that stdarg.h and the ANSI style va_start macro is used for both
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* ANSI and traditional C compilers.
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*/
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#include <machine/stdarg.h>
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#define TOCONS 0x01
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#define TOTTY 0x02
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#define TOLOG 0x04
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/* Max number conversion buffer length: a u_quad_t in base 2, plus NUL byte. */
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#define MAXNBUF (sizeof(intmax_t) * NBBY + 1)
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struct putchar_arg {
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int flags;
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int pri;
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struct tty *tty;
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};
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struct snprintf_arg {
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char *str;
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size_t remain;
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};
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extern int log_open;
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static void msglogchar(int c, int pri);
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static void putchar(int ch, void *arg);
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static char *ksprintn(char *nbuf, uintmax_t num, int base, int *len, int upper);
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static void snprintf_func(int ch, void *arg);
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static int consintr = 1; /* Ok to handle console interrupts? */
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static int msgbufmapped; /* Set when safe to use msgbuf */
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int msgbuftrigger;
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static int log_console_output = 1;
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TUNABLE_INT("kern.log_console_output", &log_console_output);
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SYSCTL_INT(_kern, OID_AUTO, log_console_output, CTLFLAG_RW,
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&log_console_output, 0, "Duplicate console output to the syslog.");
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static int always_console_output = 0;
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TUNABLE_INT("kern.always_console_output", &always_console_output);
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SYSCTL_INT(_kern, OID_AUTO, always_console_output, CTLFLAG_RW,
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&always_console_output, 0, "Always output to console despite TIOCCONS.");
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/*
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* Warn that a system table is full.
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*/
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void
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tablefull(const char *tab)
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{
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log(LOG_ERR, "%s: table is full\n", tab);
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}
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/*
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* Uprintf prints to the controlling terminal for the current process.
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*/
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int
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uprintf(const char *fmt, ...)
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{
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struct thread *td = curthread;
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struct proc *p = td->td_proc;
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va_list ap;
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struct putchar_arg pca;
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int retval;
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if (td == NULL || td == PCPU_GET(idlethread))
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return (0);
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mtx_lock(&Giant);
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p = td->td_proc;
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PROC_LOCK(p);
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if ((p->p_flag & P_CONTROLT) == 0) {
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PROC_UNLOCK(p);
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retval = 0;
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goto out;
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}
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SESS_LOCK(p->p_session);
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pca.tty = p->p_session->s_ttyp;
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SESS_UNLOCK(p->p_session);
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PROC_UNLOCK(p);
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if (pca.tty == NULL) {
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retval = 0;
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goto out;
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}
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pca.flags = TOTTY;
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va_start(ap, fmt);
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retval = kvprintf(fmt, putchar, &pca, 10, ap);
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va_end(ap);
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out:
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mtx_unlock(&Giant);
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return (retval);
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}
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/*
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* tprintf prints on the controlling terminal associated with the given
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* session, possibly to the log as well.
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*/
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void
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tprintf(struct proc *p, int pri, const char *fmt, ...)
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{
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struct tty *tp = NULL;
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int flags = 0;
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va_list ap;
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struct putchar_arg pca;
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struct session *sess = NULL;
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mtx_lock(&Giant);
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if (pri != -1)
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flags |= TOLOG;
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if (p != NULL) {
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PROC_LOCK(p);
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if (p->p_flag & P_CONTROLT && p->p_session->s_ttyvp) {
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sess = p->p_session;
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SESS_LOCK(sess);
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PROC_UNLOCK(p);
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SESSHOLD(sess);
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tp = sess->s_ttyp;
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SESS_UNLOCK(sess);
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if (ttycheckoutq(tp, 0))
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flags |= TOTTY;
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else
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tp = NULL;
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} else
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PROC_UNLOCK(p);
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}
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pca.pri = pri;
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pca.tty = tp;
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pca.flags = flags;
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va_start(ap, fmt);
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kvprintf(fmt, putchar, &pca, 10, ap);
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va_end(ap);
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if (sess != NULL)
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SESSRELE(sess);
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msgbuftrigger = 1;
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mtx_unlock(&Giant);
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}
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/*
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* Ttyprintf displays a message on a tty; it should be used only by
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* the tty driver, or anything that knows the underlying tty will not
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* be revoke(2)'d away. Other callers should use tprintf.
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*/
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int
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ttyprintf(struct tty *tp, const char *fmt, ...)
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{
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va_list ap;
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struct putchar_arg pca;
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int retval;
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va_start(ap, fmt);
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pca.tty = tp;
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pca.flags = TOTTY;
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retval = kvprintf(fmt, putchar, &pca, 10, ap);
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va_end(ap);
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return (retval);
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}
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/*
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* Log writes to the log buffer, and guarantees not to sleep (so can be
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* called by interrupt routines). If there is no process reading the
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* log yet, it writes to the console also.
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*/
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void
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log(int level, const char *fmt, ...)
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{
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va_list ap;
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struct putchar_arg pca;
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pca.tty = NULL;
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pca.pri = level;
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pca.flags = log_open ? TOLOG : TOCONS;
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va_start(ap, fmt);
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kvprintf(fmt, putchar, &pca, 10, ap);
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va_end(ap);
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msgbuftrigger = 1;
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}
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#define CONSCHUNK 128
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void
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log_console(struct uio *uio)
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{
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int c, i, error, nl;
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char *consbuffer;
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int pri;
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if (!log_console_output)
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return;
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pri = LOG_INFO | LOG_CONSOLE;
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uio = cloneuio(uio);
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consbuffer = malloc(CONSCHUNK, M_TEMP, M_WAITOK);
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nl = 0;
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while (uio->uio_resid > 0) {
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c = imin(uio->uio_resid, CONSCHUNK);
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error = uiomove(consbuffer, c, uio);
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if (error != 0)
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break;
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for (i = 0; i < c; i++) {
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msglogchar(consbuffer[i], pri);
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if (consbuffer[i] == '\n')
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nl = 1;
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else
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nl = 0;
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}
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}
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if (!nl)
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msglogchar('\n', pri);
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msgbuftrigger = 1;
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free(uio, M_IOV);
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free(consbuffer, M_TEMP);
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return;
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}
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int
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printf(const char *fmt, ...)
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{
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va_list ap;
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int savintr;
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struct putchar_arg pca;
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int retval;
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savintr = consintr; /* disable interrupts */
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consintr = 0;
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va_start(ap, fmt);
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pca.tty = NULL;
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pca.flags = TOCONS | TOLOG;
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pca.pri = -1;
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retval = kvprintf(fmt, putchar, &pca, 10, ap);
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va_end(ap);
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if (!panicstr)
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msgbuftrigger = 1;
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consintr = savintr; /* reenable interrupts */
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return (retval);
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}
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int
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vprintf(const char *fmt, va_list ap)
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{
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int savintr;
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struct putchar_arg pca;
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int retval;
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savintr = consintr; /* disable interrupts */
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consintr = 0;
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pca.tty = NULL;
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pca.flags = TOCONS | TOLOG;
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pca.pri = -1;
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retval = kvprintf(fmt, putchar, &pca, 10, ap);
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if (!panicstr)
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msgbuftrigger = 1;
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consintr = savintr; /* reenable interrupts */
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return (retval);
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}
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/*
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* Print a character on console or users terminal. If destination is
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* the console then the last bunch of characters are saved in msgbuf for
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* inspection later.
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*/
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static void
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putchar(int c, void *arg)
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{
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struct putchar_arg *ap = (struct putchar_arg*) arg;
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struct tty *tp = ap->tty;
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int consdirect, flags = ap->flags;
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consdirect = ((flags & TOCONS) && constty == NULL);
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/* Don't use the tty code after a panic or while in ddb. */
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if (panicstr)
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consdirect = 1;
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if (kdb_active)
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consdirect = 1;
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if (consdirect) {
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if (c != '\0')
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cnputc(c);
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} else {
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if ((flags & TOTTY) && tp != NULL)
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tputchar(c, tp);
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if (flags & TOCONS) {
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if (constty != NULL)
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msgbuf_addchar(&consmsgbuf, c);
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if (always_console_output && c != '\0')
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cnputc(c);
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}
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}
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if ((flags & TOLOG))
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msglogchar(c, ap->pri);
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}
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/*
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* Scaled down version of sprintf(3).
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*/
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int
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sprintf(char *buf, const char *cfmt, ...)
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{
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int retval;
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va_list ap;
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va_start(ap, cfmt);
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retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
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buf[retval] = '\0';
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va_end(ap);
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return (retval);
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}
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/*
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* Scaled down version of vsprintf(3).
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*/
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int
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vsprintf(char *buf, const char *cfmt, va_list ap)
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{
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int retval;
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retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
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buf[retval] = '\0';
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return (retval);
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}
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/*
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* Scaled down version of snprintf(3).
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*/
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int
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snprintf(char *str, size_t size, const char *format, ...)
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{
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int retval;
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va_list ap;
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va_start(ap, format);
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retval = vsnprintf(str, size, format, ap);
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va_end(ap);
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return(retval);
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}
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/*
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* Scaled down version of vsnprintf(3).
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*/
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int
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vsnprintf(char *str, size_t size, const char *format, va_list ap)
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{
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struct snprintf_arg info;
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int retval;
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info.str = str;
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info.remain = size;
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retval = kvprintf(format, snprintf_func, &info, 10, ap);
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if (info.remain >= 1)
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*info.str++ = '\0';
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return (retval);
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}
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/*
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* Kernel version which takes radix argument vsnprintf(3).
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*/
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int
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vsnrprintf(char *str, size_t size, int radix, const char *format, va_list ap)
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{
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struct snprintf_arg info;
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int retval;
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info.str = str;
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info.remain = size;
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retval = kvprintf(format, snprintf_func, &info, radix, ap);
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if (info.remain >= 1)
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*info.str++ = '\0';
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return (retval);
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}
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static void
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snprintf_func(int ch, void *arg)
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{
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struct snprintf_arg *const info = arg;
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if (info->remain >= 2) {
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*info->str++ = ch;
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info->remain--;
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}
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}
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/*
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* Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse
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* order; return an optional length and a pointer to the last character
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* written in the buffer (i.e., the first character of the string).
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* The buffer pointed to by `nbuf' must have length >= MAXNBUF.
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*/
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static char *
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ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
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{
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char *p, c;
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p = nbuf;
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*p = '\0';
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do {
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c = hex2ascii(num % base);
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*++p = upper ? toupper(c) : c;
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} while (num /= base);
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if (lenp)
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*lenp = p - nbuf;
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return (p);
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}
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/*
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* Scaled down version of printf(3).
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*
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* Two additional formats:
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*
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* The format %b is supported to decode error registers.
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* Its usage is:
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*
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* printf("reg=%b\n", regval, "<base><arg>*");
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*
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* where <base> is the output base expressed as a control character, e.g.
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* \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
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* the first of which gives the bit number to be inspected (origin 1), and
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* the next characters (up to a control character, i.e. a character <= 32),
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* give the name of the register. Thus:
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*
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* kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
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*
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* would produce output:
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*
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* reg=3<BITTWO,BITONE>
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*
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* XXX: %D -- Hexdump, takes pointer and separator string:
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* ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX
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* ("%*D", len, ptr, " " -> XX XX XX XX ...
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*/
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int
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kvprintf(char const *fmt, void (*func)(int, void*), void *arg, int radix, va_list ap)
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{
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#define PCHAR(c) {int cc=(c); if (func) (*func)(cc,arg); else *d++ = cc; retval++; }
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char nbuf[MAXNBUF];
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char *d;
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const char *p, *percent, *q;
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u_char *up;
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int ch, n;
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uintmax_t num;
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int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
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int cflag, hflag, jflag, tflag, zflag;
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int dwidth, upper;
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char padc;
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int stop = 0, retval = 0;
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num = 0;
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if (!func)
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d = (char *) arg;
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else
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d = NULL;
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if (fmt == NULL)
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fmt = "(fmt null)\n";
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if (radix < 2 || radix > 36)
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radix = 10;
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for (;;) {
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padc = ' ';
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width = 0;
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while ((ch = (u_char)*fmt++) != '%' || stop) {
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if (ch == '\0')
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return (retval);
|
|
PCHAR(ch);
|
|
}
|
|
percent = fmt - 1;
|
|
qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
|
|
sign = 0; dot = 0; dwidth = 0; upper = 0;
|
|
cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0;
|
|
reswitch: switch (ch = (u_char)*fmt++) {
|
|
case '.':
|
|
dot = 1;
|
|
goto reswitch;
|
|
case '#':
|
|
sharpflag = 1;
|
|
goto reswitch;
|
|
case '+':
|
|
sign = 1;
|
|
goto reswitch;
|
|
case '-':
|
|
ladjust = 1;
|
|
goto reswitch;
|
|
case '%':
|
|
PCHAR(ch);
|
|
break;
|
|
case '*':
|
|
if (!dot) {
|
|
width = va_arg(ap, int);
|
|
if (width < 0) {
|
|
ladjust = !ladjust;
|
|
width = -width;
|
|
}
|
|
} else {
|
|
dwidth = va_arg(ap, int);
|
|
}
|
|
goto reswitch;
|
|
case '0':
|
|
if (!dot) {
|
|
padc = '0';
|
|
goto reswitch;
|
|
}
|
|
case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
for (n = 0;; ++fmt) {
|
|
n = n * 10 + ch - '0';
|
|
ch = *fmt;
|
|
if (ch < '0' || ch > '9')
|
|
break;
|
|
}
|
|
if (dot)
|
|
dwidth = n;
|
|
else
|
|
width = n;
|
|
goto reswitch;
|
|
case 'b':
|
|
num = (u_int)va_arg(ap, int);
|
|
p = va_arg(ap, char *);
|
|
for (q = ksprintn(nbuf, num, *p++, NULL, 0); *q;)
|
|
PCHAR(*q--);
|
|
|
|
if (num == 0)
|
|
break;
|
|
|
|
for (tmp = 0; *p;) {
|
|
n = *p++;
|
|
if (num & (1 << (n - 1))) {
|
|
PCHAR(tmp ? ',' : '<');
|
|
for (; (n = *p) > ' '; ++p)
|
|
PCHAR(n);
|
|
tmp = 1;
|
|
} else
|
|
for (; *p > ' '; ++p)
|
|
continue;
|
|
}
|
|
if (tmp)
|
|
PCHAR('>');
|
|
break;
|
|
case 'c':
|
|
PCHAR(va_arg(ap, int));
|
|
break;
|
|
case 'D':
|
|
up = va_arg(ap, u_char *);
|
|
p = va_arg(ap, char *);
|
|
if (!width)
|
|
width = 16;
|
|
while(width--) {
|
|
PCHAR(hex2ascii(*up >> 4));
|
|
PCHAR(hex2ascii(*up & 0x0f));
|
|
up++;
|
|
if (width)
|
|
for (q=p;*q;q++)
|
|
PCHAR(*q);
|
|
}
|
|
break;
|
|
case 'd':
|
|
case 'i':
|
|
base = 10;
|
|
sign = 1;
|
|
goto handle_sign;
|
|
case 'h':
|
|
if (hflag) {
|
|
hflag = 0;
|
|
cflag = 1;
|
|
} else
|
|
hflag = 1;
|
|
goto reswitch;
|
|
case 'j':
|
|
jflag = 1;
|
|
goto reswitch;
|
|
case 'l':
|
|
if (lflag) {
|
|
lflag = 0;
|
|
qflag = 1;
|
|
} else
|
|
lflag = 1;
|
|
goto reswitch;
|
|
case 'n':
|
|
if (jflag)
|
|
*(va_arg(ap, intmax_t *)) = retval;
|
|
else if (qflag)
|
|
*(va_arg(ap, quad_t *)) = retval;
|
|
else if (lflag)
|
|
*(va_arg(ap, long *)) = retval;
|
|
else if (zflag)
|
|
*(va_arg(ap, size_t *)) = retval;
|
|
else if (hflag)
|
|
*(va_arg(ap, short *)) = retval;
|
|
else if (cflag)
|
|
*(va_arg(ap, char *)) = retval;
|
|
else
|
|
*(va_arg(ap, int *)) = retval;
|
|
break;
|
|
case 'o':
|
|
base = 8;
|
|
goto handle_nosign;
|
|
case 'p':
|
|
base = 16;
|
|
sharpflag = (width == 0);
|
|
sign = 0;
|
|
num = (uintptr_t)va_arg(ap, void *);
|
|
goto number;
|
|
case 'q':
|
|
qflag = 1;
|
|
goto reswitch;
|
|
case 'r':
|
|
base = radix;
|
|
if (sign)
|
|
goto handle_sign;
|
|
goto handle_nosign;
|
|
case 's':
|
|
p = va_arg(ap, char *);
|
|
if (p == NULL)
|
|
p = "(null)";
|
|
if (!dot)
|
|
n = strlen (p);
|
|
else
|
|
for (n = 0; n < dwidth && p[n]; n++)
|
|
continue;
|
|
|
|
width -= n;
|
|
|
|
if (!ladjust && width > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
while (n--)
|
|
PCHAR(*p++);
|
|
if (ladjust && width > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
break;
|
|
case 't':
|
|
tflag = 1;
|
|
goto reswitch;
|
|
case 'u':
|
|
base = 10;
|
|
goto handle_nosign;
|
|
case 'X':
|
|
upper = 1;
|
|
case 'x':
|
|
base = 16;
|
|
goto handle_nosign;
|
|
case 'y':
|
|
base = 16;
|
|
sign = 1;
|
|
goto handle_sign;
|
|
case 'z':
|
|
zflag = 1;
|
|
goto reswitch;
|
|
handle_nosign:
|
|
sign = 0;
|
|
if (jflag)
|
|
num = va_arg(ap, uintmax_t);
|
|
else if (qflag)
|
|
num = va_arg(ap, u_quad_t);
|
|
else if (tflag)
|
|
num = va_arg(ap, ptrdiff_t);
|
|
else if (lflag)
|
|
num = va_arg(ap, u_long);
|
|
else if (zflag)
|
|
num = va_arg(ap, size_t);
|
|
else if (hflag)
|
|
num = (u_short)va_arg(ap, int);
|
|
else if (cflag)
|
|
num = (u_char)va_arg(ap, int);
|
|
else
|
|
num = va_arg(ap, u_int);
|
|
goto number;
|
|
handle_sign:
|
|
if (jflag)
|
|
num = va_arg(ap, intmax_t);
|
|
else if (qflag)
|
|
num = va_arg(ap, quad_t);
|
|
else if (tflag)
|
|
num = va_arg(ap, ptrdiff_t);
|
|
else if (lflag)
|
|
num = va_arg(ap, long);
|
|
else if (zflag)
|
|
num = va_arg(ap, size_t);
|
|
else if (hflag)
|
|
num = (short)va_arg(ap, int);
|
|
else if (cflag)
|
|
num = (char)va_arg(ap, int);
|
|
else
|
|
num = va_arg(ap, int);
|
|
number:
|
|
if (sign && (intmax_t)num < 0) {
|
|
neg = 1;
|
|
num = -(intmax_t)num;
|
|
}
|
|
p = ksprintn(nbuf, num, base, &tmp, upper);
|
|
if (sharpflag && num != 0) {
|
|
if (base == 8)
|
|
tmp++;
|
|
else if (base == 16)
|
|
tmp += 2;
|
|
}
|
|
if (neg)
|
|
tmp++;
|
|
|
|
if (!ladjust && padc != '0' && width
|
|
&& (width -= tmp) > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
if (neg)
|
|
PCHAR('-');
|
|
if (sharpflag && num != 0) {
|
|
if (base == 8) {
|
|
PCHAR('0');
|
|
} else if (base == 16) {
|
|
PCHAR('0');
|
|
PCHAR('x');
|
|
}
|
|
}
|
|
if (!ladjust && width && (width -= tmp) > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
|
|
while (*p)
|
|
PCHAR(*p--);
|
|
|
|
if (ladjust && width && (width -= tmp) > 0)
|
|
while (width--)
|
|
PCHAR(padc);
|
|
|
|
break;
|
|
default:
|
|
while (percent < fmt)
|
|
PCHAR(*percent++);
|
|
/*
|
|
* Since we ignore an formatting argument it is no
|
|
* longer safe to obey the remaining formatting
|
|
* arguments as the arguments will no longer match
|
|
* the format specs.
|
|
*/
|
|
stop = 1;
|
|
break;
|
|
}
|
|
}
|
|
#undef PCHAR
|
|
}
|
|
|
|
/*
|
|
* Put character in log buffer with a particular priority.
|
|
*/
|
|
static void
|
|
msglogchar(int c, int pri)
|
|
{
|
|
static int lastpri = -1;
|
|
static int dangling;
|
|
char nbuf[MAXNBUF];
|
|
char *p;
|
|
|
|
if (!msgbufmapped)
|
|
return;
|
|
if (c == '\0' || c == '\r')
|
|
return;
|
|
if (pri != -1 && pri != lastpri) {
|
|
if (dangling) {
|
|
msgbuf_addchar(msgbufp, '\n');
|
|
dangling = 0;
|
|
}
|
|
msgbuf_addchar(msgbufp, '<');
|
|
for (p = ksprintn(nbuf, (uintmax_t)pri, 10, NULL, 0); *p;)
|
|
msgbuf_addchar(msgbufp, *p--);
|
|
msgbuf_addchar(msgbufp, '>');
|
|
lastpri = pri;
|
|
}
|
|
msgbuf_addchar(msgbufp, c);
|
|
if (c == '\n') {
|
|
dangling = 0;
|
|
lastpri = -1;
|
|
} else {
|
|
dangling = 1;
|
|
}
|
|
}
|
|
|
|
void
|
|
msgbufinit(void *ptr, int size)
|
|
{
|
|
char *cp;
|
|
static struct msgbuf *oldp = NULL;
|
|
|
|
size -= sizeof(*msgbufp);
|
|
cp = (char *)ptr;
|
|
msgbufp = (struct msgbuf *)(cp + size);
|
|
msgbuf_reinit(msgbufp, cp, size);
|
|
if (msgbufmapped && oldp != msgbufp)
|
|
msgbuf_copy(oldp, msgbufp);
|
|
msgbufmapped = 1;
|
|
oldp = msgbufp;
|
|
}
|
|
|
|
SYSCTL_DECL(_security_bsd);
|
|
|
|
static int unprivileged_read_msgbuf = 1;
|
|
SYSCTL_INT(_security_bsd, OID_AUTO, unprivileged_read_msgbuf,
|
|
CTLFLAG_RW, &unprivileged_read_msgbuf, 0,
|
|
"Unprivileged processes may read the kernel message buffer");
|
|
|
|
/* Sysctls for accessing/clearing the msgbuf */
|
|
static int
|
|
sysctl_kern_msgbuf(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
char buf[128];
|
|
u_int seq;
|
|
int error, len;
|
|
|
|
if (!unprivileged_read_msgbuf) {
|
|
error = suser(req->td);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
/* Read the whole buffer, one chunk at a time. */
|
|
msgbuf_peekbytes(msgbufp, NULL, 0, &seq);
|
|
while ((len = msgbuf_peekbytes(msgbufp, buf, sizeof(buf), &seq)) > 0) {
|
|
error = sysctl_handle_opaque(oidp, buf, len, req);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
SYSCTL_PROC(_kern, OID_AUTO, msgbuf, CTLTYPE_STRING | CTLFLAG_RD,
|
|
0, 0, sysctl_kern_msgbuf, "A", "Contents of kernel message buffer");
|
|
|
|
static int msgbuf_clearflag;
|
|
|
|
static int
|
|
sysctl_kern_msgbuf_clear(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error;
|
|
error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
|
|
if (!error && req->newptr) {
|
|
msgbuf_clear(msgbufp);
|
|
msgbuf_clearflag = 0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_PROC(_kern, OID_AUTO, msgbuf_clear,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_SECURE, &msgbuf_clearflag, 0,
|
|
sysctl_kern_msgbuf_clear, "I", "Clear kernel message buffer");
|
|
|
|
#ifdef DDB
|
|
|
|
DB_SHOW_COMMAND(msgbuf, db_show_msgbuf)
|
|
{
|
|
int i, j;
|
|
|
|
if (!msgbufmapped) {
|
|
db_printf("msgbuf not mapped yet\n");
|
|
return;
|
|
}
|
|
db_printf("msgbufp = %p\n", msgbufp);
|
|
db_printf("magic = %x, size = %d, r= %u, w = %u, ptr = %p, cksum= %u\n",
|
|
msgbufp->msg_magic, msgbufp->msg_size, msgbufp->msg_rseq,
|
|
msgbufp->msg_wseq, msgbufp->msg_ptr, msgbufp->msg_cksum);
|
|
for (i = 0; i < msgbufp->msg_size && !db_pager_quit; i++) {
|
|
j = MSGBUF_SEQ_TO_POS(msgbufp, i + msgbufp->msg_rseq);
|
|
db_printf("%c", msgbufp->msg_ptr[j]);
|
|
}
|
|
db_printf("\n");
|
|
}
|
|
|
|
#endif /* DDB */
|
|
|
|
void
|
|
hexdump(const void *ptr, int length, const char *hdr, int flags)
|
|
{
|
|
int i, j, k;
|
|
int cols;
|
|
const unsigned char *cp;
|
|
char delim;
|
|
|
|
if ((flags & HD_DELIM_MASK) != 0)
|
|
delim = (flags & HD_DELIM_MASK) >> 8;
|
|
else
|
|
delim = ' ';
|
|
|
|
if ((flags & HD_COLUMN_MASK) != 0)
|
|
cols = flags & HD_COLUMN_MASK;
|
|
else
|
|
cols = 16;
|
|
|
|
cp = ptr;
|
|
for (i = 0; i < length; i+= cols) {
|
|
if (hdr != NULL)
|
|
printf("%s", hdr);
|
|
|
|
if ((flags & HD_OMIT_COUNT) == 0)
|
|
printf("%04x ", i);
|
|
|
|
if ((flags & HD_OMIT_HEX) == 0) {
|
|
for (j = 0; j < cols; j++) {
|
|
k = i + j;
|
|
if (k < length)
|
|
printf("%c%02x", delim, cp[k]);
|
|
else
|
|
printf(" ");
|
|
}
|
|
}
|
|
|
|
if ((flags & HD_OMIT_CHARS) == 0) {
|
|
printf(" |");
|
|
for (j = 0; j < cols; j++) {
|
|
k = i + j;
|
|
if (k >= length)
|
|
printf(" ");
|
|
else if (cp[k] >= ' ' && cp[k] <= '~')
|
|
printf("%c", cp[k]);
|
|
else
|
|
printf(".");
|
|
}
|
|
printf("|");
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
|