1.\" Copyright (c) 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)kdump.1 8.1 (Berkeley) 6/6/93 33.\" $FreeBSD: src/usr.bin/kdump/kdump.1,v 1.5.2.2 2001/08/16 13:16:51 ru Exp $ 34.\" $DragonFly: src/usr.bin/kdump/kdump.1,v 1.3 2006/06/01 18:18:00 joerg Exp $ 35.\" 36.Dd June 6, 1993 37.Dt KDUMP 1 38.Os 39.Sh NAME 40.Nm kdump 41.Nd display kernel trace data 42.Sh SYNOPSIS 43.Nm 44.Op Fl dnlRT 45.Op Fl f Ar file 46.Op Fl m Ar maxdata 47.Op Fl t Op cnisuw 48.Op Fl p Ar pid 49.Sh DESCRIPTION 50The 51.Nm 52command displays the kernel trace files produced with 53.Xr ktrace 1 54in human readable format. 55By default, the file 56.Pa ktrace.out 57in the current directory is displayed. 58.Pp 59The options are as follows: 60.Bl -tag -width Fl 61.It Fl d 62Display all numbers in decimal. 63.It Fl f Ar file 64Display the specified file instead of 65.Pa ktrace.out . 66.It Fl l 67Loop reading the trace file, once the end-of-file is reached, waiting for 68more data. 69.It Fl m Ar maxdata 70Display at most 71.Ar maxdata 72bytes when decoding 73.Tn I/O . 74.It Fl p Ar pid 75Display only records for process 76.Ar pid . 77.It Fl n 78Suppress ad hoc translations. 79Normally 80.Nm 81tries to decode many system calls into a more human readable format. 82For example, 83.Xr ioctl 2 84values are replaced with the macro name and 85.Va errno 86values are replaced with the 87.Xr strerror 3 88string. 89Suppressing this feature yields a more consistent output format and is 90easily amenable to further processing. 91.It Fl R 92Display relative timestamps (time since previous entry). 93.It Fl T 94Display absolute timestamps for each entry (seconds since epoch). 95.It Fl t Ar cnisuw 96See the 97.Fl t 98option of 99.Xr ktrace 1 . 100.El 101.Sh SEE ALSO 102.Xr ktrace 1 103.Sh HISTORY 104The 105.Nm 106command appeared in 107.Bx 4.4 . 108