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 1.5 2007/05/07 15:43:31 dillon 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 djnlRT 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 j 64Use a fixed format output, otherwise a more human readable output is used. 65.It Fl f Ar file 66Display the specified file instead of 67.Pa ktrace.out . 68.It Fl l 69Loop reading the trace file, once the end-of-file is reached, waiting for 70more data. 71.It Fl m Ar maxdata 72Display at most 73.Ar maxdata 74bytes when decoding 75.Tn I/O ; 76set to 77.Cm 0 78to disable the size limit. 79.It Fl p Ar pid 80Display only records for process 81.Ar pid . 82.It Fl n 83Suppress ad hoc translations. 84Normally 85.Nm 86tries to decode many system calls into a more human readable format. 87For example, 88.Xr ioctl 2 89values are replaced with the macro name and 90.Va errno 91values are replaced with the 92.Xr strerror 3 93string. 94Suppressing this feature yields a more consistent output format and is 95easily amenable to further processing. 96.It Fl R 97Display relative timestamps (time since previous entry). 98.It Fl T 99Display absolute timestamps for each entry (seconds since epoch). 100.It Fl t Ar cnisuw 101See the 102.Fl t 103option of 104.Xr ktrace 1 . 105.El 106.Sh SEE ALSO 107.Xr ktrace 1 108.Sh HISTORY 109The 110.Nm 111command appeared in 112.Bx 4.4 . 113