132 lines
4.3 KiB
Groff
132 lines
4.3 KiB
Groff
.\" Copyright (c) 1980, 1990, 1991 Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)w.1 6.8 (Berkeley) 4/23/91
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.\" $Id: w.1,v 1.2 1993/08/01 07:26:32 mycroft Exp $
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.\"
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.Dd April 23, 1991
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.Dt W 1
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.Os BSD 4
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.Sh NAME
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.Nm w
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.Nd "who present users are and what they are doing"
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.Sh SYNOPSIS
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.Nm w
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.Op Fl hi
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.Op Ar user
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.Sh DESCRIPTION
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.Nm W
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prints a summary of the current activity on the system,
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including what each user is doing.
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The heading shows the current time of day, how long the system has been up,
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the number of users logged into the system, and the load averages.
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The load average numbers give the number of jobs in the run queue
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averaged over 1, 5 and 15 minutes.
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.Pp
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The fields output are:
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the user's login name, the name of the terminal (tty) the user is on,
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the host from which the user is logged in, the time the user logged on,
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the time since the user last typed anything,
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the
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.Tn CPU
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time used by all processes and their children on that tty,
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the
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.Tn CPU
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time used by the currently active processes, and the name and arguments
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of the current process.
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.Pp
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Available options are:
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.Bl -tag -width Ds
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.It Fl h
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Suppress the heading.
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.It Fl i
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Output is sorted by idle time.
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.El
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.Pp
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If a
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.Ar user
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name is given, the output is restricted to that user.
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.Sh FILES
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.Bl -tag -width /var/run/utmp -compact
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.It Pa /var/run/utmp
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list of users on the system
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.El
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.Sh SEE ALSO
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.Xr who 1 ,
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.Xr finger 1 ,
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.Xr ps 1
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.Sh BUGS
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The notion of the
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.Dq current process
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is muddy.
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The current algorithm is ``the highest numbered process on the terminal that
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is not ignoring interrupts, or, if there is none, the highest numbered
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process on the terminal''.
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This fails, for example, in critical sections of programs like the shell
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and editor, or when faulty programs running in the background fork and fail
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to ignore interrupts.
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(In cases where no process can be found,
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.Nm w
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prints
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.Dq \- . )
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.Pp
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The
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.Tn CPU
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time is only an estimate, in particular, if someone leaves a
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background process running after logging out, the person currently
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on that terminal is
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.Dq charged
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with the time.
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.Pp
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Background processes are not shown, even though they account for
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much of the load on the system.
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.Pp
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Sometimes processes, typically those in the background, are
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printed with null or garbaged arguments.
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In these cases, the name of the command is printed in parentheses.
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.Pp
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.Nm W
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does not know about the new conventions for detection of background jobs.
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It will sometimes find a background job instead of the right one.
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.Sh COMPATIBILITY
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The
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.Fl f ,
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.Fl l ,
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.Fl s ,
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and
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.Fl w
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flags are no longer supported.
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Ux 3.0 .
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