92 lines
3.1 KiB
Groff
92 lines
3.1 KiB
Groff
.\" Copyright (c) 1980, 1991, 1993
|
|
.\" The Regents of the University of California. 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.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgment:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
|
|
.\"
|
|
.\" @(#)dmesg.8 8.1 (Berkeley) 6/5/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd June 5, 1993
|
|
.Dt DMESG 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm dmesg
|
|
.Nd "display the system message buffer"
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl a
|
|
.Op Fl M Ar core
|
|
.Op Fl N Ar system
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility displays the contents of the system message buffer.
|
|
If neither the
|
|
.Fl N
|
|
nor the
|
|
.Fl M
|
|
option is specified, the buffer is read from the currently running kernel
|
|
via the
|
|
.Xr sysctl 3
|
|
interface.
|
|
Otherwise, the buffer is read from the specified core file (or from the
|
|
default one), using the name list from the specified kernel image (or from
|
|
the default image).
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width indent
|
|
.It Fl a
|
|
Show all data in the message buffer.
|
|
This includes any syslog records and
|
|
.Pa /dev/console
|
|
output.
|
|
.It Fl M
|
|
Extract values associated with the name list from the specified core
|
|
instead of the default
|
|
.Pa /dev/kmem .
|
|
.It Fl N
|
|
Extract the name list from the specified system instead of the default,
|
|
which is the kernel image the system has booted from.
|
|
.El
|
|
.Sh FILES
|
|
.Bl -tag -width ".Pa /var/run/dmesg.boot" -compact
|
|
.It Pa /var/run/dmesg.boot
|
|
usually a snapshot of the buffer contents
|
|
taken soon after filesystems are mounted
|
|
at startup time
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr sysctl 3 ,
|
|
.Xr syslogd 8
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
utility appeared in
|
|
.Bx 4.0 .
|