[apple/shell_cmds.git] / w / w.1

.\"	$NetBSD: w.1,v 1.8 1997/11/01 03:28:22 mycroft Exp $
.\"
.\" Copyright (c) 1980, 1990, 1991, 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. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. 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.
.\"
.\"     @(#)w.1	8.1 (Berkeley) 6/6/93
.\"
.Dd June 6, 1993
.Dt W 1
.Os BSD 4
.Sh NAME
.Nm w
.Nd "who present users are and what they are doing"
.Sh SYNOPSIS
.Nm
.Op Fl hin
.Op Fl M Ar core
.Op Fl N Ar system
.Op Ar user
.Sh DESCRIPTION
The
.Nm
utility prints a summary of the current activity on the system,
including what each user is doing.
The first line displays the current time of day, how long the system has
been running, the number of users logged into the system, and the load
averages.
The load average numbers give the number of jobs in the run queue averaged
over 1, 5 and 15 minutes.
.Pp
The fields output are the user's login name, the name of the terminal the
user is on, the host from which the user is logged in, the time the user
logged on, the time since the user last typed anything,
and the name and arguments of the current process.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl h
Suppress the heading.
.It Fl i
Output is sorted by idle time.
.It Fl M
Extract values associated with the name list from the specified
core instead of the default
.Dq /dev/kmem .
.It Fl N
Extract the name list from the specified system instead of the
default
.Dq /mach .
.It Fl n
Show network addresses as numbers (normally
.Nm
interprets addresses and attempts to display them symbolically).
.El
.Pp
If a
.Ar user
name is specified, the output is restricted to that user.
.Sh FILES
.Bl -tag -width /var/run/utmp -compact
.It Pa /var/run/utmp
list of users on the system
.El
.Sh SEE ALSO
.Xr who 1 ,
.Xr finger 1 ,
.Xr ps 1 ,
.Xr uptime 1
.Sh BUGS
The notion of the
.Dq current process
is muddy.
The current algorithm is ``the highest numbered process on the terminal
that is not ignoring interrupts, or, if there is none, the highest numbered
process on the terminal''.
This fails, for example, in critical sections of programs like the shell
and editor, or when faulty programs running in the background fork and fail
to ignore interrupts.
(In cases where no process can be found,
.Nm
prints
.Dq \- . )
.Pp
The
.Tn CPU
time is only an estimate, in particular, if someone leaves a background
process running after logging out, the person currently on that terminal is
.Dq charged
with the time.
.Pp
Background processes are not shown, even though they account for
much of the load on the system.
.Pp
Sometimes processes, typically those in the background, are printed with
null or garbaged arguments.
In these cases, the name of the command is printed in parentheses.
.Pp
The 
.Nm
utility does not know about the new conventions for detection of background
jobs.
It will sometimes find a background job instead of the right one.
.Sh COMPATIBILITY
The
.Fl f ,
.Fl l ,
.Fl s ,
and
.Fl w
flags are no longer supported.
.Sh HISTORY
The
.Nm
command appeared in
.Ux 3.0 .
Commit	Line	Data
44bd5ea7 A	1	.\" $NetBSD: w.1,v 1.8 1997/11/01 03:28:22 mycroft Exp $
	2	.\"
	3	.\" Copyright (c) 1980, 1990, 1991, 1993
	4	.\" The Regents of the University of California. All rights reserved.
	5	.\"
	6	.\" Redistribution and use in source and binary forms, with or without
	7	.\" modification, are permitted provided that the following conditions
	8	.\" are met:
	9	.\" 1. Redistributions of source code must retain the above copyright
	10	.\" notice, this list of conditions and the following disclaimer.
	11	.\" 2. Redistributions in binary form must reproduce the above copyright
	12	.\" notice, this list of conditions and the following disclaimer in the
	13	.\" documentation and/or other materials provided with the distribution.
	14	.\" 3. All advertising materials mentioning features or use of this software
	15	.\" must display the following acknowledgement:
	16	.\" This product includes software developed by the University of
	17	.\" California, Berkeley and its contributors.
	18	.\" 4. Neither the name of the University nor the names of its contributors
	19	.\" may be used to endorse or promote products derived from this software
	20	.\" without specific prior written permission.
	21	.\"
	22	.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	23	.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	24	.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	25	.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	26	.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	27	.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	28	.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	29	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	30	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	31	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	32	.\" SUCH DAMAGE.
	33	.\"
	34	.\" @(#)w.1 8.1 (Berkeley) 6/6/93
	35	.\"
	36	.Dd June 6, 1993
	37	.Dt W 1
	38	.Os BSD 4
	39	.Sh NAME
	40	.Nm w
	41	.Nd "who present users are and what they are doing"
	42	.Sh SYNOPSIS
	43	.Nm
	44	.Op Fl hin
	45	.Op Fl M Ar core
	46	.Op Fl N Ar system
	47	.Op Ar user
	48	.Sh DESCRIPTION
	49	The
	50	.Nm
	51	utility prints a summary of the current activity on the system,
	52	including what each user is doing.
	53	The first line displays the current time of day, how long the system has
	54	been running, the number of users logged into the system, and the load
	55	averages.
	56	The load average numbers give the number of jobs in the run queue averaged
	57	over 1, 5 and 15 minutes.
	58	.Pp
	59	The fields output are the user's login name, the name of the terminal the
	60	user is on, the host from which the user is logged in, the time the user
	61	logged on, the time since the user last typed anything,
	62	and the name and arguments of the current process.
	63	.Pp
	64	The options are as follows:
65	.Bl -tag -width Ds
66	.It Fl h
67	Suppress the heading.
68	.It Fl i
69	Output is sorted by idle time.
70	.It Fl M
71	Extract values associated with the name list from the specified
72	core instead of the default
73	.Dq /dev/kmem .
74	.It Fl N
75	Extract the name list from the specified system instead of the
76	default
c0fcf4e1	77	.Dq /mach .
44bd5ea7 A	78	.It Fl n
	79	Show network addresses as numbers (normally
	80	.Nm
	81	interprets addresses and attempts to display them symbolically).
	82	.El
	83	.Pp
	84	If a
	85	.Ar user
	86	name is specified, the output is restricted to that user.
	87	.Sh FILES
	88	.Bl -tag -width /var/run/utmp -compact
	89	.It Pa /var/run/utmp
	90	list of users on the system
	91	.El
	92	.Sh SEE ALSO
	93	.Xr who 1 ,
	94	.Xr finger 1 ,
	95	.Xr ps 1 ,
	96	.Xr uptime 1
	97	.Sh BUGS
	98	The notion of the
	99	.Dq current process
	100	is muddy.
	101	The current algorithm is ``the highest numbered process on the terminal
	102	that is not ignoring interrupts, or, if there is none, the highest numbered
	103	process on the terminal''.
	104	This fails, for example, in critical sections of programs like the shell
	105	and editor, or when faulty programs running in the background fork and fail
	106	to ignore interrupts.
	107	(In cases where no process can be found,
	108	.Nm
	109	prints
	110	.Dq \- . )
	111	.Pp
	112	The
	113	.Tn CPU
	114	time is only an estimate, in particular, if someone leaves a background
	115	process running after logging out, the person currently on that terminal is
	116	.Dq charged
	117	with the time.
	118	.Pp
	119	Background processes are not shown, even though they account for
	120	much of the load on the system.
	121	.Pp
	122	Sometimes processes, typically those in the background, are printed with
	123	null or garbaged arguments.
	124	In these cases, the name of the command is printed in parentheses.
	125	.Pp
	126	The
	127	.Nm
	128	utility does not know about the new conventions for detection of background
	129	jobs.
	130	It will sometimes find a background job instead of the right one.
	131	.Sh COMPATIBILITY
	132	The
	133	.Fl f ,
	134	.Fl l ,
	135	.Fl s ,
	136	and
	137	.Fl w
	138	flags are no longer supported.
	139	.Sh HISTORY
	140	The
	141	.Nm
142	command appeared in
143	.Ux 3.0 .