1.\" Copyright (c) 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" %sccs.include.redist.roff% 5.\" 6.\" @(#)kdump.1 8.1 (Berkeley) 06/06/93 7.\" 8.Dd 9.Dt KDUMP 1 10.Os BSD 4.4 11.Sh NAME 12.Nm kdump 13.Nd display kernel trace data 14.Sh SYNOPSIS 15.Nm kdump 16.Op Fl dnlRT 17.Op Fl f Ar file 18.Op Fl m Ar maxdata 19.Op Fl t Op cnis 20.Sh DESCRIPTION 21.Nm Kdump 22displays the kernel trace files produced with 23.Xr ktrace 1 24in human readable format. 25By default, the file 26.Pa ktrace.out 27in the current directory is displayed. 28.Pp 29The options are as follows: 30.Bl -tag -width Fl 31.It Fl d 32Display all numbers in decimal. 33.It Fl f Ar file 34Display the specified file instead of 35.Pa ktrace.out . 36.It Fl l 37Loop reading the trace file, once the end-of-file is reached, waiting for 38more data. 39.It Fl m Ar maxdata 40Display at most 41.Ar maxdata 42bytes when decoding 43.Tn I/O . 44.It Fl n 45Suppress ad hoc translations. 46Normally 47.Nm kdump 48tries to decode many system calls into a more human readable format. 49For example, 50.Xr ioctl 2 51values are replaced with the macro name and 52.Va errno 53values are replaced with the 54.Xr strerror 3 55string. 56Suppressing this feature yields a more consistent output format and is 57easily amenable to further processing. 58.It Fl R 59Display relative timestamps (time since previous entry). 60.It Fl T 61Display absolute timestamps for each entry (seconds since epoch). 62.It Fl t Ar cnis 63See the 64.Fl t 65option of 66.Xr ktrace 1 . 67.El 68.Sh SEE ALSO 69.Xr ktrace 1 70.Sh HISTORY 71The 72.Nm kdump 73command appears in 74.Bx 4.4 . 75