Index: head/usr.bin/banner/banner.6
===================================================================
--- head/usr.bin/banner/banner.6	(revision 362326)
+++ head/usr.bin/banner/banner.6	(revision 362327)
@@ -1,78 +1,83 @@
 .\" Copyright (c) 1980, 1993, 1995
 .\"	The Regents of the University of California.  All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" 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)
 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
 .\"	From: @(#)banner.6	8.2 (Berkeley) 4/29/95
 .\" $FreeBSD$
 .\"
-.Dd January 26, 2005
+.Dd May 26, 2020
 .Dt BANNER 6
 .Os
 .Sh NAME
 .Nm banner
 .Nd print large banner on printer
 .Sh SYNOPSIS
 .Nm
 .Op Fl d
 .Op Fl t
 .Op Fl w Ar width
 .Ar message ...
 .Sh DESCRIPTION
 .Nm Banner
 prints a large, high quality banner on the standard output.
 If the message is omitted, it prompts for and reads one line of its
 standard input.
 .Pp
 The output should be printed on paper of the appropriate width,
 with no breaks between the pages.
 .Pp
 The following options are available:
 .Bl -tag -width indent
 .It Fl d
 Enable debug.
 .It Fl t
 Enable trace.
 .It Fl w Ar width
 Change the output from a width of 132 to
 .Ar width ,
 suitable for a narrow terminal.
 .El
+.Sh HISTORY
+The
+.Nm
+utility first appeared in
+.Bx 4.4 .
 .Sh AUTHORS
 .An Mark Horton
 .Sh BUGS
 Several
 .Tn ASCII
 characters are not defined, notably <, >, [, ], \\,
 ^, _, {, }, |, and ~.
 Also, the characters ", ', and & are funny looking (but in a useful way.)
 .Pp
 The
 .Fl w
 option is implemented by skipping some rows and columns.
 The smaller it gets, the grainier the output.
 Sometimes it runs letters together.
 .Pp
 Messages are limited to 1024 characters in length.
Index: head/usr.bin/basename/basename.1
===================================================================
--- head/usr.bin/basename/basename.1	(revision 362326)
+++ head/usr.bin/basename/basename.1	(revision 362327)
@@ -1,113 +1,120 @@
 .\" Copyright (c) 1990, 1993, 1994
 .\"	The Regents of the University of California.  All rights reserved.
 .\"
 .\" This code is derived from software contributed to Berkeley by
 .\" the Institute of Electrical and Electronics Engineers, Inc.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" 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)
 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
 .\"     @(#)basename.1	8.2 (Berkeley) 4/18/94
 .\" $FreeBSD$
 .\"
-.Dd April 18, 1994
+.Dd May 26, 2020
 .Dt BASENAME 1
 .Os
 .Sh NAME
 .Nm basename , dirname
 .Nd return filename or directory portion of pathname
 .Sh SYNOPSIS
 .Nm
 .Ar string
 .Op Ar suffix
 .Nm
 .Op Fl a
 .Op Fl s Ar suffix
 .Ar string
 .Op Ar ...
 .Nm dirname
 .Ar string
 .Op Ar ...
 .Sh DESCRIPTION
 The
 .Nm
 utility deletes any prefix ending with the last slash
 .Ql \&/
 character present in
 .Ar string
 (after first stripping trailing slashes),
 and a
 .Ar suffix ,
 if given.
 The
 .Ar suffix
 is not stripped if it is identical to the remaining characters in
 .Ar string .
 The resulting filename is written to the standard output.
 A non-existent suffix is ignored.
 If
 .Fl a
 is specified, then every argument is treated as a
 .Ar string
 as if
 .Nm
 were invoked with just one argument.
 If
 .Fl s
 is specified, then the
 .Ar suffix
 is taken as its argument, and all other arguments are treated as a
 .Ar string .
 .Pp
 The
 .Nm dirname
 utility deletes the filename portion, beginning
 with the last slash
 .Ql \&/
 character to the end of
 .Ar string
 (after first stripping trailing slashes),
 and writes the result to the standard output.
 .Sh EXIT STATUS
 .Ex -std basename dirname
 .Sh EXAMPLES
 The following line sets the shell variable
 .Ev FOO
 to
 .Pa /usr/bin .
 .Pp
 .Dl FOO=`dirname /usr/bin/trail`
 .Sh SEE ALSO
 .Xr csh 1 ,
 .Xr sh 1 ,
 .Xr basename 3 ,
 .Xr dirname 3
 .Sh STANDARDS
 The
 .Nm
 and
 .Nm dirname
 utilities are expected to be
 .St -p1003.2
 compatible.
+.Sh HISTORY
+The
+.Nm
+and
+.Nm dirname
+utilities first appeared in
+.Bx 4.4 .
Index: head/usr.bin/limits/limits.1
===================================================================
--- head/usr.bin/limits/limits.1	(revision 362326)
+++ head/usr.bin/limits/limits.1	(revision 362327)
@@ -1,406 +1,416 @@
 .\" Copyright (c) 1996 David Nugent <davidn@blaze.net.au>
 .\" All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, is permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice immediately at the beginning of the file, without modification,
 .\"    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. This work was done expressly for inclusion into FreeBSD.  Other use
 .\"    is permitted provided this notation is included.
 .\" 4. Absolutely no warranty of function or purpose is made by the author
 .\"    David Nugent.
 .\" 5. Modifications may be freely made to this file providing the above
 .\"    conditions are met.
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 13, 2018
+.Dd May 26, 2020
 .Dt LIMITS 1
 .Os
 .Sh NAME
 .Nm limits
 .Nd set or display process resource limits
 .Sh SYNOPSIS
 .Nm
 .Op Fl C Ar class | Fl P Ar pid | Fl U Ar user
 .Op Fl SHB
 .Op Fl ea
 .Op Fl bcdfklmnopstuvw Op Ar val
 .Nm
 .Op Fl C Ar class | Fl U Ar user
 .Op Fl SHB
 .Op Fl bcdfklmnopstuvw Op Ar val
 .Op Fl E
 .Oo
 .Op Ar name Ns = Ns Ar value ...
 .Ar command
 .Oc
 .Sh DESCRIPTION
 The
 .Nm
 utility either prints or sets kernel resource limits, and may optionally set
 environment variables like
 .Xr env 1
 and run a program with the selected resources.
 Three uses of the
 .Nm
 utility are possible:
 .Bl -tag -width indent
 .It Xo
 .Nm
 .Op Ar limitflags
 .Op Ar name Ns = Ns Ar value ...
 .Ar command
 .Xc
 This usage sets limits according to
 .Ar limitflags ,
 optionally sets environment variables given as
 .Ar name Ns = Ns Ar value
 pairs, and then runs the specified
 .Ar command .
 .It Nm Op Ar limitflags
 This usage determines values of resource settings according to
 .Ar limitflags ,
 does not attempt to set them and outputs these values to
 standard output.
 By default, this will output the current kernel resource settings
 active for the calling process.
 Using the
 .Fl C Ar class
 or
 .Fl U Ar user
 options, you may also display the current resource settings modified
 by the appropriate login class resource limit entries from
 the
 .Xr login.conf 5
 login capabilities database.
 .It Nm Fl e Op Ar limitflags
 This usage determines values of resource settings according to
 .Ar limitflags ,
 but does not set them.
 Like the previous usage, it outputs these values to standard
 output, except that it will emit them in
 .Ic eval
 format, suitable for the calling shell.
 If the shell is known (i.e., it is one of
 .Nm sh , csh , bash , tcsh , ksh , pdksh
 or
 .Nm rc ) ,
 .Nm
 emits
 .Ic limit
 or
 .Ic ulimit
 commands in the format understood by
 that shell.
 If the name of the shell cannot be determined, then the
 .Ic ulimit
 format used by
 .Xr sh 1
 is used.
 .Pp
 This is very useful for setting limits used by scripts, or prior
 launching of daemons and other background tasks with specific
 resource limit settings, and provides the benefit of allowing
 global configuration of maximum resource usage by maintaining a
 central database of settings in the login class database.
 .Pp
 Within a shell script,
 .Nm
 will normally be used with eval within backticks as follows:
 .Pp
 .Dl "eval `limits -e -C daemon`"
 .Pp
 which causes the output of
 .Nm
 to be evaluated and set by the current shell.
 .El
 .Pp
 The value of
 .Ar limitflags
 specified in the above contains one or more of the following options:
 .Bl -tag -width ".Fl C Ar class"
 .It Fl C Ar class
 Use current resource values, modified by the resource entries applicable
 for the login class
 .Ar class .
 .It Fl U Ar user
 Use current resource values, modified by the resource entries applicable
 to the login class the
 .Ar user
 belongs to.
 If user does not belong to any class, then the resource capabilities
 for the
 .Dq Li default
 class are used, if it exists, or the
 .Dq Li root
 class if the user is a superuser account.
 .It Fl P Ar pid
 Select or set limits for the process identified by the
 .Ar pid .
 .It Fl S
 Select display or setting of
 .Dq soft
 (or current) resource limits.
 If specific limits settings follow this switch, only soft limits are
 affected unless overridden later with either the
 .Fl H
 or
 .Fl B
 options.
 .It Fl H
 Select display or setting of
 .Dq hard
 (or maximum) resource limits.
 If specific limits settings follow this switch, only hard limits are
 affected until overridden later with either the
 .Fl S
 or
 .Fl B
 options.
 .It Fl B
 Select display or setting of both
 .Dq soft
 (current) or
 .Dq hard
 (maximum)
 resource limits.
 If specific limits settings follow this switch, both soft and hard
 limits are affected until overridden later with either the
 .Fl S
 or
 .Fl H
 options.
 .It Fl e
 Select
 .Dq "eval mode"
 formatting for output.
 This is valid only in display mode and cannot be used when running a
 command.
 The exact syntax used for output depends upon the type of shell from
 which
 .Nm
 is invoked.
 .It Fl b Op Ar val
 Select or set the
 .Va sbsize
 resource limit.
 .It Fl c Op Ar val
 Select or set (if
 .Ar val
 is specified) the
 .Va coredumpsize
 resource limit.
 A value of 0 disables core dumps.
 .It Fl d Op Ar val
 Select or set (if
 .Ar val
 is specified) the
 .Va datasize
 resource limit.
 .It Fl f Op Ar val
 Select or set the
 .Va filesize
 resource limit.
 .It Fl k Op Ar val
 Select or set the
 .Va kqueues
 resource limit.
 .It Fl l Op Ar val
 Select or set the
 .Va memorylocked
 resource limit.
 .It Fl m Op Ar val
 Select or set the
 .Va memoryuse
 size limit.
 .It Fl n Op Ar val
 Select or set the
 .Va openfiles
 resource limit.
 The system-wide limit on the maximum number of
 open files per process can be viewed by examining the
 .Va kern.maxfilesperproc
 .Xr sysctl 8
 variable.
 The total number of simultaneously open files in the entire
 system is limited to the value displayed by the
 .Va kern.maxfiles
 .Xr sysctl 8
 variable.
 .It Fl o Op Ar val
 Select or set the
 .Va umtxp
 resource limit.
 The limit determines the maximal number of the process-shared locks
 which may be simultaneously created by the processes owned by the
 user, see
 .Xr pthread 3 .
 .It Fl p Op Ar val
 Select or set the
 .Va pseudoterminals
 resource limit.
 .It Fl s Op Ar val
 Select or set the
 .Va stacksize
 resource limit.
 .It Fl t Op Ar val
 Select or set the
 .Va cputime
 resource limit.
 .It Fl u Op Ar val
 Select or set the
 .Va maxproc
 resource limit.
 The system-wide limit on the maximum number of processes
 allowed per UID can be viewed by examining the
 .Va kern.maxprocperuid
 .Xr sysctl 8
 variable.
 The maximum number of processes that can be running simultaneously
 in the entire system is limited to the value of the
 .Va kern.maxproc
 .Xr sysctl 8
 variable.
 .It Fl v Op Ar val
 Select or set the
 .Va virtualmem
 resource limit.
 This limit encompasses the entire VM space for the user process
 and is inclusive of text, data, bss, stack,
 .Xr brk 2 ,
 .Xr sbrk 2
 and
 .Xr mmap 2 Ns 'd
 space.
 .It Fl w Op Ar val
 Select or set the
 .Va swapuse
 resource limit.
 .El
 .Pp
 Valid values for
 .Ar val
 in the above set of options consist of either the
 string
 .Dq Li infinity ,
 .Dq Li inf ,
 .Dq Li unlimited
 or
 .Dq Li unlimit
 for an infinite (or kernel-defined maximum)
 limit, or a numeric value optionally followed by a suffix.
 Values which relate to size default to a value in bytes, or one of the
 following suffixes may be used as a multiplier:
 .Pp
 .Bl -tag -offset indent -width 4n -compact
 .It Li b
 512 byte blocks.
 .It Li k
 kilobytes (1024 bytes).
 .It Li m
 megabytes (1024*1024 bytes).
 .It Li g
 gigabytes.
 .It Li t
 terabytes.
 .El
 .Pp
 The
 .Va cputime
 resource defaults to a number of seconds, but a multiplier may be
 used, and as with size values, multiple values separated by a valid
 suffix are added together:
 .Pp
 .Bl -tag -offset indent -width 4n -compact
 .It Li s
 seconds.
 .It Li m
 minutes.
 .It Li h
 hours.
 .It Li d
 days.
 .It Li w
 weeks.
 .It Li y
 365 day years.
 .El
 .Bl -tag -width ".Fl C Ar class"
 .It Fl E
 Cause
 .Nm
 to completely ignore the environment it inherits.
 .It Fl a
 Force all resource settings to be displayed even if
 other specific resource settings have been specified.
 For example, if you wish to disable core dumps when starting up
 the Usenet News system, but wish to set all other resource settings
 as well that apply to the
 .Dq Li news
 account, you might use:
 .Pp
 .Dl "eval `limits -U news -aBec 0`"
 .Pp
 As with the
 .Xr setrlimit 2
 call, only the superuser may raise process
 .Dq hard
 resource limits.
 Non-root users may, however, lower them or change
 .Dq soft
 resource limits
 within to any value below the hard limit.
 When invoked to execute a program, the failure of
 .Nm
 to raise a hard limit is considered a fatal error.
 .El
 .Sh EXIT STATUS
 The
 .Nm
 utility
 exits with
 .Dv EXIT_FAILURE
 if usage is incorrect in any way; i.e., an invalid
 option, or set/display options are selected in the same invocation,
 .Fl e
 is used when running a program, etc.
 When run in display or eval mode,
 .Nm
 exits with a status of
 .Dv EXIT_SUCCESS .
 When run in command mode and execution of the command succeeds, the exit status
 will be whatever the executed program returns.
 .Sh SEE ALSO
 .Xr csh 1 ,
 .Xr env 1 ,
 .Xr limit 1 ,
 .Xr sh 1 ,
 .Xr getrlimit 2 ,
 .Xr setrlimit 2 ,
 .Xr login_cap 3 ,
 .Xr login.conf 5 ,
 .Xr rctl 8 ,
 .Xr sysctl 8
+.Sh HISTORY
+The
+.Nm
+utility first appeared in
+.Fx 2.1.7 .
+.Sh AUTHORS
+The
+.Nm
+utility was written by
+.An David Nugent Aq Mt davidn@FreeBSD.org . 
 .Sh BUGS
 The
 .Nm
 utility does not handle commands with equal
 .Pq Ql =
 signs in their
 names, for obvious reasons.
 .Pp
 The
 .Nm
 utility makes no effort to ensure that resource settings emitted or displayed
 are valid and settable by the current user.
 Only a superuser account may raise hard limits, and when doing so
 the
 .Fx
 kernel will silently lower limits to values less than
 specified if the values given are too high.
Index: head/usr.bin/vmstat/vmstat.8
===================================================================
--- head/usr.bin/vmstat/vmstat.8	(revision 362326)
+++ head/usr.bin/vmstat/vmstat.8	(revision 362327)
@@ -1,393 +1,398 @@
 .\" Copyright (c) 1986, 1993
 .\"	The Regents of the University of California.  All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" 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)
 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
 .\"	@(#)vmstat.8	8.1 (Berkeley) 6/6/93
 .\" $FreeBSD$
 .\"
-.Dd January 18, 2018
+.Dd May 26, 2020
 .Dt VMSTAT 8
 .Os
 .Sh NAME
 .Nm vmstat
 .Nd report virtual memory statistics
 .Sh SYNOPSIS
 .Nm
 .\" .Op Fl fimst
 .Op Fl -libxo
 .Op Fl afHhimoPsz
 .Op Fl M Ar core Op Fl N Ar system
 .Op Fl c Ar count
 .Op Fl n Ar devs
 .Oo
 .Fl p
 .Sm off
 .Ar type , if , pass
 .Sm on
 .Oc
 .Op Fl w Ar wait
 .Op Ar disks ...
 .Op wait Op count
 .Sh DESCRIPTION
 The
 .Nm
 utility reports certain kernel statistics kept about process, virtual memory,
 disk, trap and cpu activity.
 .Pp
 If the
 .Fl M
 option is not specified, information is obtained from
 the currently running kernel via the
 .Xr sysctl 3
 interface.
 Otherwise, information is read from the specified core file,
 using the name list from the specified kernel image (or from
 the default image).
 .Pp
 The options are as follows:
 .Bl -tag -width indent
 .It Fl -libxo
 Generate output via
 .Xr libxo 3
 in a selection of different human and machine readable formats.
 See
 .Xr xo_parse_args 3
 for details on command line arguments.
 .It Fl a
 When used with
 .Fl i ,
 include statistics about interrupts that have never been generated.
 .It Fl c
 Repeat the display
 .Ar count
 times.
 The first display is for the time since a reboot and each subsequent
 report is for the time period since the last display.
 If no repeat
 .Ar count
 is specified, and
 .Fl w
 is specified, the default is infinity, otherwise the default is one.
 .It Fl f
 Report on the number
 .Xr fork 2 ,
 .Xr vfork 2
 and
 .Xr rfork 2
 system calls since system startup, and the number of pages of virtual memory
 involved in each.
 .It Fl h
 Changes memory columns into more easily human readable form.
 The default if
 standard output is a terminal device.
 .It Fl H
 Changes memory columns into straight numbers.
 The default if standard output
 is not a terminal device (such as a script).
 .It Fl i
 Report on the number of interrupts taken by each device since system
 startup.
 .It Fl M
 Extract values associated with the name list from the specified
 .Ar core .
 .It Fl N
 If
 .Fl M
 is also specified,
 extract the name list from the specified
 .Ar system
 instead of the default,
 which is the kernel image the system has booted from.
 .It Fl m
 Report on the usage of kernel dynamic memory allocated using
 .Xr malloc 9
 by type.
 .It Fl n
 Change the maximum number of disks to display from the default of 2.
 .It Fl o
 Display a list of virtual memory objects in the system and the resident
 memory used by each object.
 .It Fl P
 Report per-cpu system/user/idle cpu statistics.
 .It Fl p
 Specify which types of devices to display.
 There are three different
 categories of devices:
 .Pp
 .Bl -tag -width indent -compact
 .It device type:
 .Bl -tag -width 9n -compact
 .It da
 Direct Access devices
 .It sa
 Sequential Access devices
 .It printer
 Printers
 .It proc
 Processor devices
 .It worm
 Write Once Read Multiple devices
 .It cd
 CD devices
 .It scanner
 Scanner devices
 .It optical
 Optical Memory devices
 .It changer
 Medium Changer devices
 .It comm
 Communication devices
 .It array
 Storage Array devices
 .It enclosure
 Enclosure Services devices
 .It floppy
 Floppy devices
 .El
 .Pp
 .It interface:
 .Bl -tag -width 9n -compact
 .It IDE
 Integrated Drive Electronics devices
 .It SCSI
 Small Computer System Interface devices
 .It other
 Any other device interface
 .El
 .Pp
 .It passthrough:
 .Bl -tag -width 9n -compact
 .It pass
 Passthrough devices
 .El
 .El
 .Pp
 The user must specify at least one device type, and may specify at most
 one device type from each category.
 Multiple device types in a single
 device type statement must be separated by commas.
 .Pp
 Any number of
 .Fl p
 arguments may be specified on the command line.
 All
 .Fl p
 arguments are ORed together to form a matching expression against which
 all devices in the system are compared.
 Any device that fully matches
 any
 .Fl p
 argument will be included in the
 .Nm
 output, up to two devices, or the maximum number of devices specified
 by the user.
 .It Fl s
 Display the contents of the
 .Em sum
 structure, giving the total number of several kinds of paging related
 events which have occurred since system startup.
 .\" .It Fl t
 .\" Report on the number of page in and page reclaims since system startup,
 .\" and the amount of time required by each.
 .It Fl w
 Pause
 .Ar wait
 seconds between each display.
 If no repeat
 .Ar wait
 interval is specified, the default is 1 second.
 The
 .Nm
 command will accept and honor a non-integer number of seconds.
 .It Fl z
 Report on memory used by the kernel zone allocator,
 .Xr uma 9 ,
 by zone.
 .El
 .Pp
 The
 .Ar wait
 and
 .Ar count
 arguments may be given after their respective flags at any point
 on the command line before the
 .Ar disks
 argument(s), or without their flags, as the final argument(s).
 The latter form is accepted for backwards compatibility, but it is
 preferred to use the forms with
 .Fl w
 and
 .Fl c
 to avoid ambiguity.
 .Pp
 By default,
 .Nm
 displays the following information:
 .Bl -tag -width indent
 .It procs
 Information about the number of threads in various states:
 .Pp
 .Bl -tag -width indent -compact
 .It r
 running or in run queue
 .It b
 blocked for resources (i/o, paging, etc.)
 .It w
 swapped out
 .El
 .It memory
 Information about the usage of virtual and real memory.
 .Pp
 Mapped virtual memory is a sum of all of the virtual pages belonging
 to mapped virtual memory objects.
 Note that the entire memory object's size is considered mapped even if
 only a subset of the object's pages are currently mapped.
 This statistic is not related to the active page queue which is used to track
 real memory.
 .Pp
 .Bl -tag -width indent -compact
 .It avm
 mapped virtual memory
 .Po previously called active in
 .Nm
 output
 .Pc
 .It fre
 size of the free list
 .El
 .It page
 Information about page faults and paging activity.
 These are given in units per second.
 .Pp
 .Bl -tag -width indent -compact
 .It flt
 total number of page faults
 .It re
 page reclaims (simulating reference bits)
 .\" .It at
 .\" pages attached (found in free list)
 .It pi
 pages paged in
 .It po
 pages paged out
 .It fr
 pages freed
 .\" .It de
 .\" anticipated short term memory shortfall
 .It sr
 pages scanned by page daemon
 .El
 .It disks
 Disk operations per second (this field is system dependent).
 Typically paging will be split across the available drives.
 The header of the field is the first two characters of the disk name and
 the unit number.
 If more than two disk drives are configured in the system,
 .Nm
 displays only the first two drives, unless the user specifies the
 .Fl n
 argument to increase the number of drives displayed.
 This will probably
 cause the display to exceed 80 columns, however.
 To force
 .Nm
 to display specific drives, their names may be supplied on the command line.
 The
 .Nm
 utility
 defaults to show disks first, and then various other random devices in the
 system to add up to two devices, if there are that many devices in the
 system.
 If devices are specified on the command line, or if a device type
 matching pattern is specified (see above),
 .Nm
 will only display the given devices or the devices matching the pattern,
 and will not randomly select other devices in the system.
 .It faults
 Trap/interrupt rates per second.
 .Pp
 .Bl -tag -width indent -compact
 .It in
 device interrupts (including clock interrupts)
 .It sy
 system calls
 .It cs
 cpu context switches
 .El
 .It cpu
 Breakdown of percentage usage of CPU time.
 .Pp
 .Bl -tag -width indent -compact
 .It us
 user time for normal and low priority processes
 .It sy
 system and interrupt time
 .It id
 cpu idle
 .El
 .El
 .Sh FILES
 .Bl -tag -width /boot/kernel/kernel -compact
 .It Pa /boot/kernel/kernel
 default kernel namelist
 .It Pa /dev/kmem
 default memory file
 .El
 .Sh EXAMPLES
 The command:
 .Dl vmstat -w 5
 will print what the system is doing every five
 seconds.
 .Pp
 The command:
 .Dl vmstat -p da -p cd -w 1
 will tell vmstat to select the first two direct access or CDROM devices
 and display statistics on those devices, as well as other systems
 statistics every second.
 .Sh SEE ALSO
 .Xr fstat 1 ,
 .Xr netstat 1 ,
 .Xr nfsstat 1 ,
 .Xr ps 1 ,
 .Xr systat 1 ,
 .Xr libmemstat 3 ,
 .Xr libxo 3 ,
 .Xr xo_parse_args 3 ,
 .Xr gstat 8 ,
 .Xr iostat 8 ,
 .Xr pstat 8 ,
 .Xr sysctl 8 ,
 .Xr malloc 9 ,
 .Xr uma 9
 .Pp
 The sections starting with ``Interpreting system activity'' in
 .%T "Installing and Operating 4.3BSD" .
+.Sh HISTORY
+The
+.Nm
+utility first appeared in
+.Bx 4.3 .
 .Sh BUGS
 The
 .Fl c
 and
 .Fl w
 options are only available with the default output.