KDUMP(1)                   OpenBSD Reference Manual                   KDUMP(1)

NAME
     kdump - display kernel trace data

SYNOPSIS
     kdump [-dnlRT] [-e emulation] [-f file] [-m maxdata] [-t [cenis]]

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, unless overriden by the -f option.

     The options are as follows:

     -d      Display all numbers in decimal.  By default, values are printed
             out in hexadecimal.

     -e emulation
             Interpret system call maps assuming the named emulation instead
             of "bsd". For example, to view trace output from a Linux binary,
             use -e linux.

     -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 exam-
             ple, ioctl(2) values are replaced with the macro name and errno
             values are replaced with the strerror(3) string.  Suppressing
             this feature yields a more consistent output format and is easily
             amenable to further processing.

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

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

     -t [cenis]
             See the -t option of ktrace(1).

FILES
     ktrace.out  default ktrace dump file

SEE ALSO
     ktrace(1)

HISTORY
     The kdump command appeared in 4.4BSD.

OpenBSD 2.9                      June 6, 1993                                1
