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KDUMP(1)		     BSD Reference Manual		      KDUMP(1)

NAME
     kdump - display kernel trace data

SYNOPSIS
     kdump [-dnlRT] [-f file] [-m maxdata] [-t [+acinsw]]

DESCRIPTION
     Kdump displays the kernel trace files produced with ktrace(1) in human
     readable format.  By default, the file ktrace.out in the current directo-
     ry is displayed.

     The options are as follows:

     -d		 Display all numbers in decimal.

     -f file	 Display the specified file instead of ktrace.out.

     -l		 Loop reading the trace file, once the end-of-file is reached,
		 waiting for more data.

     -m maxdata	 Display at most maxdata bytes when decoding I/O.

     -n		 Suppress ad hoc translations.	Normally kdump tries to decode
		 many system calls into a more human readable format.  For ex-
		 ample, ioctl(2) values are replaced with the macro name and
		 errno values are replaced with the strerror(3) string.	 Sup-
		 pressing this feature yields a more consistent output format
		 and is easily amenable to further processing.

     -R		 Display relative timestamps (time since previous entry).

     -r		 Display base relative timestamps (time since first entry).

     -T		 Display absolute timestamps for each entry (seconds since
		 epoch).

     -t acinsw	 Selects which types of trace records to display.  The default
		 is to display all trace records in the trace file.  See the
		 -t option of ktrace(1) for a detailed listing of the avail-
		 able options.

     The kdump utility exits 0 on success, and >0 if an error occurs.

SEE ALSO
     ktrace(1),	 ktrace(2)

HISTORY
     The kdump command appears in 4.4BSD.

4.4BSD				 July 11, 1995				     1

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