-.\" Copyright (c) 1980, 1990 Regents of the University of California.
+.\" Copyright (c) 1980, 1990, 1991 Regents of the University of California.
.\" All rights reserved.
.\"
-.\" %sccs.include.redist.man%
+.\" 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.
.\"
-.\" @(#)w.1 6.6 (Berkeley) %G%
+.\" 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.
.\"
-.TH W 1 "%Q"
-.UC 4
-.SH NAME
-w \- who is logged in and what they are doing
-.SH SYNOPSIS
-.B w
-[
-.B \-hi
-] [ user ]
-.SH DESCRIPTION
-.I W
+.\" @(#)w.1 6.8 (Berkeley) 4/23/91
+.\"
+.Dd April 23, 1991
+.Dt W 1
+.Os BSD 4
+.Sh NAME
+.Nm w
+.Nd "who present users are and what they are doing"
+.Sh SYNOPSIS
+.Nm w
+.Op Fl hi
+.Op Ar user
+.Sh DESCRIPTION
+.Nm W
prints a summary of the current activity on the system,
including what each user is doing.
-The heading line shows the current time of day,
-how long the system has been up,
-the number of users logged into the system,
-and the load averages.
+The heading shows the current time of day, how long the system has been up,
+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
+.Pp
The fields output are:
-the users login name,
-the name of the tty the user is on,
-the host from which the user is logged in,
-the time the user logged on,
+the user's login name, the name of the terminal (tty) 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,
-the name and arguments of the current process.
-.PP
-The
-.B \-h
-flag suppresses the heading.
-The
-.B \-i
-flag causes output to sorted by idle time.
-The
-.B \-flsuw
-flags are no longer supported.
-.PP
+the
+.Tn CPU
+time used by all processes and their children on that tty,
+the
+.Tn CPU
+time used by the currently active processes, and the name and arguments
+of the current process.
+.Pp
+Available options are:
+.Bl -tag -width Ds
+.It Fl h
+Suppress the heading.
+.It Fl i
+Output is sorted by idle time.
+.El
+.Pp
If a
-.I user
-name is included,
-the output will be restricted to that user.
-.SH FILES
-.ta 1i
-/var/run/utmp
-.br
-/dev/kmem
-.br
-/dev/drum
-.SH "SEE ALSO"
-who(1), finger(1), ps(1)
-.SH BUGS
-.PP
+.Ar user
+name is given, 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
+.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 w
+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
+.Nm W
+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 .
projects / unix-history / blobdiff