Index: head/bin/pkill/pkill.1
===================================================================
--- head/bin/pkill/pkill.1	(revision 366447)
+++ head/bin/pkill/pkill.1	(revision 366448)
@@ -1,309 +1,414 @@
 .\"	$NetBSD: pkill.1,v 1.8 2003/02/14 15:59:18 grant Exp $
 .\"
 .\" $FreeBSD$
 .\"
 .\" Copyright (c) 2002 The NetBSD Foundation, Inc.
 .\" All rights reserved.
 .\"
 .\" This code is derived from software contributed to The NetBSD Foundation
 .\" by Andrew Doran.
 .\"
 .\" 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.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 .\"
-.Dd December 3, 2018
+.Dd October 5, 2020
 .Dt PKILL 1
 .Os
 .Sh NAME
 .Nm pgrep , pkill
 .Nd find or signal processes by name
 .Sh SYNOPSIS
 .Nm pgrep
 .Op Fl LSafilnoqvx
 .Op Fl F Ar pidfile
 .Op Fl G Ar gid
 .Op Fl M Ar core
 .Op Fl N Ar system
 .Op Fl P Ar ppid
 .Op Fl U Ar uid
 .Op Fl c Ar class
 .Op Fl d Ar delim
 .Op Fl g Ar pgrp
 .Op Fl j Ar jail
 .Op Fl s Ar sid
 .Op Fl t Ar tty
 .Op Fl u Ar euid
 .Ar pattern ...
 .Nm pkill
 .Op Fl Ar signal
 .Op Fl ILafilnovx
 .Op Fl F Ar pidfile
 .Op Fl G Ar gid
 .Op Fl M Ar core
 .Op Fl N Ar system
 .Op Fl P Ar ppid
 .Op Fl U Ar uid
 .Op Fl c Ar class
 .Op Fl g Ar pgrp
 .Op Fl j Ar jail
 .Op Fl s Ar sid
 .Op Fl t Ar tty
 .Op Fl u Ar euid
 .Ar pattern ...
 .Sh DESCRIPTION
 The
 .Nm pgrep
 command searches the process table on the running system and prints the
 process IDs of all processes that match the criteria given on the command
 line.
 .Pp
 The
 .Nm pkill
 command searches the process table on the running system and signals all
 processes that match the criteria given on the command line.
 .Pp
 The following options are available:
 .Bl -tag -width ".Fl F Ar pidfile"
 .It Fl F Ar pidfile
 Restrict matches to a process whose PID is stored in the
 .Ar pidfile
 file.
 .It Fl G Ar gid
 Restrict matches to processes with a real group ID in the comma-separated
 list
 .Ar gid .
 .It Fl I
 Request confirmation before attempting to signal each process.
 .It Fl L
 The
 .Ar pidfile
 file given for the
 .Fl F
 option must be locked with the
 .Xr flock 2
 syscall or created with
 .Xr pidfile 3 .
 .It Fl M Ar core
 Extract values associated with the name list from the specified core
 instead of the currently running system.
 .It Fl N Ar system
 Extract the name list from the specified system instead of the default,
 which is the kernel image the system has booted from.
 .It Fl P Ar ppid
 Restrict matches to processes with a parent process ID in the
 comma-separated list
 .Ar ppid .
 .It Fl S
 Search also in system processes (kernel threads).
 .It Fl U Ar uid
 Restrict matches to processes with a real user ID in the comma-separated
 list
 .Ar uid .
 .It Fl d Ar delim
 Specify a delimiter to be printed between each process ID.
 The default is a newline.
 This option can only be used with the
 .Nm pgrep
 command.
 .It Fl a
 Include process ancestors in the match list.
 By default, the current
 .Nm pgrep
 or
 .Nm pkill
 process and all of its ancestors are excluded (unless
 .Fl v
 is used).
 .It Fl c Ar class
 Restrict matches to processes running with specified login class
 .Ar class .
 .It Fl f
 Match against full argument lists.
 The default is to match against process names.
 .It Fl g Ar pgrp
 Restrict matches to processes with a process group ID in the comma-separated
 list
 .Ar pgrp .
 The value zero is taken to mean the process group ID of the running
 .Nm pgrep
 or
 .Nm pkill
 command.
 .It Fl i
 Ignore case distinctions in both the process table and the supplied pattern.
 .It Fl j Ar jail
 Restrict matches to processes inside the specified jails.
 The argument
 .Ar jail
 may be
 .Dq Li any
 to match processes in any jail,
 .Dq Li none
 to match processes not in jail,
 or a comma-separated list of jail IDs or names.
 .It Fl l
 Long output.
 For
 .Nm pgrep ,
 print the process name in addition to the process ID for each matching
 process.
 If used in conjunction with
 .Fl f ,
 print the process ID and the full argument list for each matching process.
 For
 .Nm pkill ,
 display the kill command used for each process killed.
 .It Fl n
 Select only the newest (most recently started) of the matching processes.
 .It Fl o
 Select only the oldest (least recently started) of the matching processes.
 .It Fl q
 For
 .Nm pgrep ,
 Do not write anything to standard output.
 .It Fl s Ar sid
 Restrict matches to processes with a session ID in the comma-separated
 list
 .Ar sid .
 The value zero is taken to mean the session ID of the running
 .Nm pgrep
 or
 .Nm pkill
 command.
 .It Fl t Ar tty
 Restrict matches to processes associated with a terminal in the
 comma-separated list
 .Ar tty .
 Terminal names may be of the form
 .Pa tty Ns Ar xx
 or the shortened form
 .Ar xx .
 A single dash
 .Pq Ql -
 matches processes not associated with a terminal.
 .It Fl u Ar euid
 Restrict matches to processes with an effective user ID in the
 comma-separated list
 .Ar euid .
 .It Fl v
 Reverse the sense of the matching; display processes that do not match the
 given criteria.
 .It Fl x
 Require an exact match of the process name, or argument list if
 .Fl f
 is given.
 The default is to match any substring.
 .It Fl Ns Ar signal
 A non-negative decimal number or symbolic signal name specifying the signal
 to be sent instead of the default
 .Dv TERM .
 This option is valid only when given as the first argument to
 .Nm pkill .
 .El
 .Pp
 If any
 .Ar pattern
 operands are specified, they are used as extended regular expressions to match
 the command name or full argument list of each process.
 If the
 .Fl f
 option is not specified, then the
 .Ar pattern
 will attempt to match the command name.
 However, presently
 .Fx
 will only keep track of the first 19 characters of the command
 name for each process.
 Attempts to match any characters after the first 19 of a command name
 will quietly fail.
 .Pp
 Note that a running
 .Nm pgrep
 or
 .Nm pkill
 process will never consider itself nor system processes (kernel threads) as
 a potential match.
 .Sh IMPLEMENTATION NOTES
 The Sun Solaris implementation utilised procfs to obtain process information.
 This implementation utilises
 .Xr kvm 3
 instead.
 On a live system,
 .Xr kvm 3
 uses
 .Va kern.proc
 MIB to obtain the list of processes, kernel memory through
 .Pa /dev/kmem
 is not accessed.
 .Sh EXIT STATUS
 The
 .Nm pgrep
 and
 .Nm pkill
 utilities
 return one of the following values upon exit:
 .Bl -tag -width indent
 .It 0
 One or more processes were matched.
 .It 1
 No processes were matched.
 .It 2
 Invalid options were specified on the command line.
 .It 3
 An internal error occurred.
 .El
+.Sh EXAMPLES
+Show the pid of the process holding the
+.Pa /tmp/.X0-lock
+pid file:
+.Bd -literal -offset indent
+$ pgrep -F /tmp/.X0-lock
+1211
+.Ed
+.Pp
+Show the pid and the name of the process including kernel threads in the
+search:
+.Bd -literal -offset indent
+$ pgrep -lS vnlru
+37 vnlru
+.Ed
+.Pp
+Search for processes including kernel threads that match the extended regular
+expression pattern:
+.Bd -literal -offset indent
+$ pgrep -S 'crypto.*[2-3]'
+20
+19
+6
+5
+.Ed
+.Pp
+Show long output for firefox processes:
+.Bd -literal -offset indent
+$ pgrep -l firefox
+1312 firefox
+1309 firefox
+1288 firefox
+1280 firefox
+1279 firefox
+1278 firefox
+1277 firefox
+1264 firefox
+.Ed
+.Pp
+Same as above but just showing the pid of the most recent process:
+.Bd -literal -offset indent
+$ pgrep -n firefox
+1312
+.Ed
+.Pp
+Look for vim processes.
+Match against the full argument list:
+.Bd -literal -offset indent
+$ pgrep -f vim
+44968
+30790
+.Ed
+.Pp
+Same as above but matching against the
+.Ql list
+word and showing the full argument list:
+.Bd -literal -offset indent
+$ pgrep -f -l list
+30790 vim list.txt
+.Ed
+.Pp
+Send
+.Va SIGSTOP
+signal to processes that are an exact match:
+.Bd -literal -offset indent
+$ pkill -SIGSTOP -f -x "vim list.txt"
+.Ed
+.Pp
+Without
+.Fl f
+names over 19 characters will silently fail:
+.Bd -literal -offset indent
+$ vim this_is_a_very_long_file_name &
+[1] 36689
+$
+
+[1]+  Stopped                 vim this_is_a_very_long_file_name
+$ pgrep "vim this"
+$
+.Ed
+.Pp
+Same as above using the
+.Fl f
+flag:
+.Bd -literal -offset indent
+$ pgrep -f "vim this"
+36689
+.Ed
+.Pp
+Find the
+.Xr top 1
+command running in any jail:
+.Bd -literal -offset indent
+$ pgrep -j any top
+34498
+.Ed
+.Pp
+Show all processes running in jail ID 58:
+.Bd -literal -offset indent
+$ pgrep -l -j58 '.*'
+28397 pkg-static
+28396 pkg-static
+28255 sh
+28254 make
+.Ed
 .Sh COMPATIBILITY
 Historically the option
 .Dq Fl j Li 0
 means any jail, although in other utilities such as
 .Xr ps 1
 jail ID
 .Li 0
 has the opposite meaning, not in jail.
 Therefore
 .Dq Fl j Li 0
 is deprecated, and its use is discouraged in favor of
 .Dq Fl j Li any .
 .Sh SEE ALSO
 .Xr kill 1 ,
 .Xr killall 1 ,
 .Xr ps 1 ,
 .Xr flock 2 ,
 .Xr kill 2 ,
 .Xr sigaction 2 ,
 .Xr kvm 3 ,
 .Xr pidfile 3 ,
 .Xr re_format 7
 .\" Xr signal 7
 .Sh HISTORY
 The
 .Nm pkill
 and
 .Nm pgrep
 utilities
 first appeared in
 .Nx 1.6 .
 They are modelled after utilities of the same name that appeared in Sun
 Solaris 7.
 They made their first appearance in
 .Fx 5.3 .
 .Sh AUTHORS
 .An Andrew Doran Aq Mt ad@NetBSD.org