Home | History | Annotate | Line # | Download | only in w
w.1 revision 1.15 
 $NetBSD: w.1,v 1.15 2004/12/23 01:55:30 wiz 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. 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 December 22, 2004
.Dt W 1
.Os
.Sh NAME
.Nm w
.Nd who present users are and what they are doing
.Sh SYNOPSIS
.Nm
.Op Fl hinw
.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.

p
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.

p
The options are as follows:
l -tag -width Ds t Fl h Suppress the heading.
t Fl i Output is sorted by idle time.
t Fl M Extract values associated with the name list from the specified
core instead of the default
.Dq /dev/kmem .
t Fl N Extract the name list from the specified system instead of the
default
.Dq /netbsd .
t Fl n Show network addresses as numbers (normally
.Nm
interprets addresses and attempts to display them symbolically).
t Fl w Show wide output without truncating any fields.
Normally the host field is truncated to 35 characters.
.El

p
If a
.Ar user
name is specified, the output is restricted to that user.
.Sh FILES
l -tag -width /var/run/utmp -compact t Pa /var/run/utmp list of users on the system
.El
.Sh SEE ALSO
.Xr finger 1 ,
.Xr ps 1 ,
.Xr uptime 1 ,
.Xr who 1
.Sh HISTORY
The
.Nm
command appeared in
x 3.0 . .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 - . )

p
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.

p
Background processes are not shown, even though they account for
much of the load on the system.

p
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.

p
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.