386BSD 0.1 development

[unix-history] / usr / src / sbin / dmesg / dmesg.8

diff --git a/usr/src/sbin/dmesg/dmesg.8 b/usr/src/sbin/dmesg/dmesg.8
index 263a1e7..b90ec05 100644 (file)
--- a/usr/src/sbin/dmesg/dmesg.8
+++ b/usr/src/sbin/dmesg/dmesg.8
@@ -1,48 +1,63 @@
-.\" Copyright (c) 1980 Regents of the University of California.
-.\" All rights reserved.  The Berkeley software License Agreement
-.\" specifies the terms and conditions for redistribution.
+.\" Copyright (c) 1980, 1991 Regents of the University of California.
+.\" All rights reserved.

 .\"
 .\"

-.\"    @(#)dmesg.8     6.1 (Berkeley) %G%
+.\" 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 acknowledgement:
+.\"    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.

 .\"
 .\"

-.TH DMESG 8 ""
-.UC 4
-.SH NAME
-dmesg \- collect system diagnostic messages to form error log
-.SH SYNOPSIS
-.B /etc/dmesg
-[ \- ]
-.SH DESCRIPTION
-.I Dmesg
-looks in a system buffer for recently printed diagnostic messages
-and prints them on the standard output.
-The messages are those printed by the system when device (hardware) errors
-occur and (occasionally) when system tables overflow non-fatally.
-If the
-.B \-
-flag is given, then
-.I dmesg
-computes (incrementally) the new messages since the last time it
-was run and places these on the standard output.
-This is typically used with
-.IR cron (8)
-to produce the error log
-.I /usr/adm/messages
-by running the command
-.IP
-/etc/dmesg \- >> /usr/adm/messages
-.LP
-every 10 minutes.
-.SH FILES
-.ta 2i
-/usr/adm/messages      error log (conventional location)
-.br
-/usr/adm/msgbuf        scratch file for memory of \- option
-.SH BUGS
-The system error message buffer is of small finite size.  As
-.I dmesg
-is run only every few minutes, not all error messages
-are guaranteed to be logged.  This can be construed as a blessing rather
-than a curse.
-.PP
-Error diagnostics generated immediately before a system crash will
-never get logged.
+.\" 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    6.5 (Berkeley) 5/2/91
+.\"
+.Dd May 2, 1991
+.Dt DMESG 8
+.Os BSD 4
+.Sh NAME
+.Nm dmesg
+.Nd "display the system message buffer"
+.Sh SYNOPSIS
+.Nm dmesg
+.Op Fl M Ar core
+.Op Fl N Ar system
+.Sh DESCRIPTION
+.Nm Dmesg
+displays the contents of the system message buffer.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl M
+Extract values associated with the name list from the specified core
+instead of the default ``/dev/kmem''.
+.It Fl N
+Extract the name list from the specified system instead of the default
+``/vmunix''.
+.El
+.Sh SEE ALSO
+.Xr syslogd 8
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.0 .