[unix-history] / usr / src / usr.bin / w / w.1

.\" Copyright (c) 1980, 1990, 1991 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	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 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
The fields output are:
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
.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
.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 .
Commit	Line	Data
14253b29 WJ	1	.\" Copyright (c) 1980, 1990, 1991 Regents of the University of California.
	2	.\" All rights reserved.
	3	.\"
	4	.\" Redistribution and use in source and binary forms, with or without
	5	.\" modification, are permitted provided that the following conditions
	6	.\" are met:
	7	.\" 1. Redistributions of source code must retain the above copyright
	8	.\" notice, this list of conditions and the following disclaimer.
	9	.\" 2. Redistributions in binary form must reproduce the above copyright
	10	.\" notice, this list of conditions and the following disclaimer in the
	11	.\" documentation and/or other materials provided with the distribution.
	12	.\" 3. All advertising materials mentioning features or use of this software
	13	.\" must display the following acknowledgement:
	14	.\" This product includes software developed by the University of
	15	.\" California, Berkeley and its contributors.
	16	.\" 4. Neither the name of the University nor the names of its contributors
	17	.\" may be used to endorse or promote products derived from this software
	18	.\" without specific prior written permission.
	19	.\"
	20	.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	21	.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	24	.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	.\" SUCH DAMAGE.
	31	.\"
	32	.\" @(#)w.1 6.8 (Berkeley) 4/23/91
	33	.\"
	34	.Dd April 23, 1991
	35	.Dt W 1
	36	.Os BSD 4
	37	.Sh NAME
	38	.Nm w
	39	.Nd "who present users are and what they are doing"
	40	.Sh SYNOPSIS
	41	.Nm w
	42	.Op Fl hi
	43	.Op Ar user
	44	.Sh DESCRIPTION
	45	.Nm W
	46	prints a summary of the current activity on the system,
	47	including what each user is doing.
	48	The heading shows the current time of day, how long the system has been up,
	49	the number of users logged into the system, and the load averages.
	50	The load average numbers give the number of jobs in the run queue
	51	averaged over 1, 5 and 15 minutes.
	52	.Pp
	53	The fields output are:
	54	the user's login name, the name of the terminal (tty) the user is on,
	55	the host from which the user is logged in, the time the user logged on,
	56	the time since the user last typed anything,
	57	the
	58	.Tn CPU
	59	time used by all processes and their children on that tty,
	60	the
	61	.Tn CPU
	62	time used by the currently active processes, and the name and arguments
	63	of the current process.
	64	.Pp
65	Available options are:
66	.Bl -tag -width Ds
67	.It Fl h
68	Suppress the heading.
69	.It Fl i
70	Output is sorted by idle time.
71	.El
72	.Pp
73	If a
74	.Ar user
75	name is given, the output is restricted to that user.
76	.Sh FILES
77	.Bl -tag -width /var/run/utmp -compact
78	.It Pa /var/run/utmp
79	list of users on the system
80	.El
81	.Sh SEE ALSO
82	.Xr who 1 ,
83	.Xr finger 1 ,
84	.Xr ps 1
85	.Sh BUGS
86	The notion of the
87	.Dq current process
88	is muddy.
89	The current algorithm is ``the highest numbered process on the terminal that
90	is not ignoring interrupts, or, if there is none, the highest numbered
91	process on the terminal''.
92	This fails, for example, in critical sections of programs like the shell
93	and editor, or when faulty programs running in the background fork and fail
94	to ignore interrupts.
95	(In cases where no process can be found,
96	.Nm w
97	prints
98	.Dq \- . )
99	.Pp
100	The
101	.Tn CPU
102	time is only an estimate, in particular, if someone leaves a
103	background process running after logging out, the person currently
104	on that terminal is
105	.Dq charged
106	with the time.
107	.Pp
108	Background processes are not shown, even though they account for
109	much of the load on the system.
110	.Pp
111	Sometimes processes, typically those in the background, are
112	printed with null or garbaged arguments.
113	In these cases, the name of the command is printed in parentheses.
114	.Pp
115	.Nm W
116	does not know about the new conventions for detection of background jobs.
117	It will sometimes find a background job instead of the right one.
118	.Sh COMPATIBILITY
119	The
120	.Fl f ,
121	.Fl l ,
122	.Fl s ,
123	and
124	.Fl w
125	flags are no longer supported.
126	.Sh HISTORY
127	The
128	.Nm
129	command appeared in
130	.Ux 3.0 .