 @@ -1,281 +1,281 @@
-.\"	$NetBSD: ktrace.1,v 1.42 2011/06/01 22:17:43 wiz Exp $
+.\"	$NetBSD: ktrace.1,v 1.42.4.1 2015/04/14 13:36:26 msaitoh Exp $
 .\"
 .\" Copyright (c) 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
 .\"
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 .\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
 .\" 3. Neither the name of the University nor the names of its contributors
 .\"    may be used to endorse or promote products derived from this software
 .\"    without specific prior written permission.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 .\"	@(#)ktrace.1	8.1 (Berkeley) 6/6/93
 .\"
-.Dd June 1, 2011
+.Dd January 8, 2015
 .Dt KTRACE 1
 .Os
 .Sh NAME
 .Nm ktrace , ktruss
 .Nd enable kernel process tracing
 .Sh SYNOPSIS
 .Nm
 .Op Fl aCcdins
 .Op Fl f Ar trfile
 .Op Fl g Ar pgrp
 .Op Fl p Ar pid
 .Op Fl t Ar trstr
 .Nm
 .Op Fl adis
 .Op Fl f Ar trfile
 .Op Fl t Ar trstr
 .Ar command
 .Nm ktruss
 .Op Fl aCcdilnRT
 .Op Fl e Ar emulation
 .Op Fl f Ar infile
 .Op Fl g Ar pgrp
 .Op Fl m Ar maxdata
 .Op Fl o Ar outfile
 .Op Fl p Ar pid
 .Op Fl t Ar trstr
 .Nm ktruss
 .Op Fl adinRT
 .Op Fl e Ar emulation
 .Op Fl m Ar maxdata
 .Op Fl o Ar outfile
 .Op Fl t Ar trstr
 .Op Fl v Ar vers
 command
 .Sh DESCRIPTION
 .Nm
 enables kernel trace logging for the specified processes.
 Kernel trace data is logged to the file
 .Pa ktrace.out .
 The kernel operations that are traced include system calls, namei
 translations, signal processing, and
 .Tn I/O .
 .Pp
 Once tracing is enabled on a process, trace data will be logged until
 either the process exits or the trace point is cleared.
 A traced process can generate enormous amounts of log data quickly;
 It is strongly suggested that users memorize how to disable tracing before
 attempting to trace a process.
 The following command is sufficient to disable tracing on all user owned
 processes, and, if executed by root, all processes:
 .Pp
 .Dl \&$ ktrace -C
 .Pp
 The trace file is not human readable; use
 .Xr kdump 1
 to decode it.
 .Pp
 .Nm ktruss
 is functionally the same as
 .Nm ktrace
 except that trace output is printed
 on standard output or to the file specified with the
 .Fl o
 option.
 .Nm ktruss
 is useful to see the kernel operations interleaved with
 the program output.
 .Pp
 The options are as follows:
 .Bl -tag -width indent
 .It Fl a
 Append to the trace file instead of truncating it.
 .It Fl C
 Disable tracing on all user owned processes, and, if executed by root, all
 processes in the system.
 .It Fl c
 Clear the trace points associated with the specified file or processes.
 .It Fl d
 Descendants; perform the operation for all current children of the
 designated processes.
 .It Fl f Ar trfile
 Log trace records to
 .Ar trfile
 instead of
 .Pa ktrace.out .
 .It Fl f Ar infile
 Read the trace records from
 .Ar infile
 and print them in a human readable format to standard out.
 .It Fl g Ar pgid
 Enable (disable) tracing on all processes in the process group (only one
 .Fl g
 flag is permitted).
 .It Fl i
 Inherit; pass the trace flags to all future children of the designated
 processes.
 .It Fl l
 Poll the trace file for new data and print it to standard out.
 Only for use together with the
 .Fl f
 option.
 .It Fl m Ar maxdata
 Print at most
 .Ar maxdata
 bytes of data.
 This is used for pointer type arguments, e.g., strings.
 The data will be escaped in C-style unless
 .Fl x
 is specified when it will be output in hex and ascii.
 .It Fl n
 Stop tracing if attempts to write to the trace file would block.
 This option always affects
 .Nm ktruss
 and only affects
 .Nm ktrace
 when writing to
 .Dv stdout .
 If this flag is not set, then the traced program will block until it can
 write more data to the trace file descriptor.
 .It Fl o Ar outfile
 Log trace records to
 .Ar outfile .
 Without this option
 .Nm ktruss
 will print its output in a human
 readable format to standard out.
 .It Fl p Ar pid
 Enable (disable) tracing on the indicated process id (only one
 .Fl p
 flag is permitted).
 .It Fl s
 Write to the trace file with synchronized I/O.
 .It Fl R
 Display relative time stamps to output.
 .It Fl T
 Same as the
 .Fl R
 option, but use absolute timestamps instead.
 .It Fl t Ar trstr
 The string argument represents the kernel trace points, one per letter.
 The following table equates the letters with the tracepoints:
 .Pp
 .Bl -tag -width flag -compact
 .It Cm A
 trace all tracepoints
 .It Cm a
 trace exec arguments
 .It Cm c
 trace system calls
 .It Cm e
 trace emulation changes
 .It Cm f
 trace open file descriptors after exec
 .It Cm i
 trace
 .Tn I/O
 .It Cm n
 trace namei translations
 .It Cm S
 trace MIB access (sysctl)
 .It Cm s
 trace signal processing
 .\" .It Cm U
 .\" trace scheduler activations upcall data
 .It Cm u
 trace user data
 .It Cm v
 trace exec environment
 .It Cm w
 trace context switches
 .It Cm +
-trace the default set of trace points (c, e, i, l, m, n, s, u)
+trace the default set of trace points (c, e, i, n, s, u)
 .It Cm -
 do not trace following trace points
 .El
 .It Fl e Ar emulation
 If an emulation of a process is unknown,
 interpret system call maps assuming the named emulation instead of
 default "netbsd".
 .It Ar command
 Execute
 .Ar command
 with the specified trace flags.
 .It Fl v Ar version
 Determines the
 .Ar version
 of the file generated.
 Version 0 is the compatible ktrace format, and
 version 1 is the new format with lwp IDs and nanosecond (instead of
 microsecond) timestamps.
 .El
 .Pp
 The
 .Fl p ,
 .Fl g ,
 and
 .Ar command
 options are mutually exclusive.
 The
 .Fl R
 and
 .Fl T
 options are also mutually exclusive.
 .Sh EXAMPLES
 # trace all kernel operations of process id 34
 .Dl $ ktrace -p 34
 .Pp
 .Bd -literal
 # trace all kernel operations of processes in process group 15 and
 # pass the trace flags to all current and future children
 .Ed
 .Dl $ ktrace -idg 15
 .Pp
 # disable all tracing of process 65
 .Dl $ ktrace -cp 65
 .Pp
 # disable tracing signals on process 70 and all current children
 .Dl $ ktrace -t s -cdp 70
 .Pp
 # enable tracing of
 .Tn I/O
 on process 67
 .Dl $ ktrace -ti -p 67
 .Pp
 # run the command "w", tracing only system calls
 .Dl $ ktrace -tc w
 .Pp
 # disable all tracing to the file "tracedata"
 .Dl $ ktrace -c -f tracedata
 .Pp
 # disable tracing of all processes owned by the user
 .Dl $ ktrace -C
 .Pp
 # run the command "w", displaying to standard output
 .Dl $ ktruss w
 .Pp
 # trace process 42 and log the records to "ktruss.out"
 .Dl $ ktruss -p 42 -o ktruss.out
 .Pp
 # poll ktruss.out for available records and print them
 .Dl $ ktruss -lf ktruss.out
 .Sh SEE ALSO
 .Xr kdump 1 ,
 .Xr ktrace 2
 .Sh HISTORY
 The
 .Nm
 command appears in
 .Bx 4.4 .