Annotation of src/usr.bin/w/w.1, Revision 1.1
1.1 ! deraadt 1: .\" Copyright (c) 1980, 1990, 1991, 1993
! 2: .\" The Regents of the University of California. 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
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! 31: .\"
! 32: .\" @(#)w.1 8.1 (Berkeley) 6/6/93
! 33: .\"
! 34: .Dd June 6, 1993
! 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 hin
! 43: .Op Fl M Ar core
! 44: .Op Fl N Ar system
! 45: .Op Ar user
! 46: .Sh DESCRIPTION
! 47: The
! 48: .Nm w
! 49: utility prints a summary of the current activity on the system,
! 50: including what each user is doing.
! 51: The first line displays the current time of day, how long the system has
! 52: been running, the number of users logged into the system, and the load
! 53: averages.
! 54: The load average numbers give the number of jobs in the run queue averaged
! 55: over 1, 5 and 15 minutes.
! 56: .Pp
! 57: The fields output are the user's login name, the name of the terminal the
! 58: user is on, the host from which the user is logged in, the time the user
! 59: logged on, the time since the user last typed anything,
! 60: and the name and arguments of the current process.
! 61: .Pp
! 62: The options are as follows:
! 63: .Bl -tag -width Ds
! 64: .It Fl h
! 65: Suppress the heading.
! 66: .It Fl i
! 67: Output is sorted by idle time.
! 68: .It Fl M
! 69: Extract values associated with the name list from the specified
! 70: core instead of the default
! 71: .Dq /dev/kmem .
! 72: .It Fl N
! 73: Extract the name list from the specified system instead of the
! 74: default
! 75: .Dq /netbsd .
! 76: .It Fl n
! 77: Show network addresses as numbers (normally
! 78: .Nm w
! 79: interprets addresses and attempts to display them symbolically).
! 80: .El
! 81: .Pp
! 82: If a
! 83: .Ar user
! 84: name is specified, the output is restricted to that user.
! 85: .Sh FILES
! 86: .Bl -tag -width /var/run/utmp -compact
! 87: .It Pa /var/run/utmp
! 88: list of users on the system
! 89: .El
! 90: .Sh SEE ALSO
! 91: .Xr who 1 ,
! 92: .Xr finger 1 ,
! 93: .Xr ps 1 ,
! 94: .Xr uptime 1 ,
! 95: .Sh BUGS
! 96: The notion of the
! 97: .Dq current process
! 98: is muddy.
! 99: The current algorithm is ``the highest numbered process on the terminal
! 100: that is not ignoring interrupts, or, if there is none, the highest numbered
! 101: process on the terminal''.
! 102: This fails, for example, in critical sections of programs like the shell
! 103: and editor, or when faulty programs running in the background fork and fail
! 104: to ignore interrupts.
! 105: (In cases where no process can be found,
! 106: .Nm w
! 107: prints
! 108: .Dq \- . )
! 109: .Pp
! 110: The
! 111: .Tn CPU
! 112: time is only an estimate, in particular, if someone leaves a background
! 113: process running after logging out, the person currently on that terminal is
! 114: .Dq charged
! 115: with the time.
! 116: .Pp
! 117: Background processes are not shown, even though they account for
! 118: much of the load on the system.
! 119: .Pp
! 120: Sometimes processes, typically those in the background, are printed with
! 121: null or garbaged arguments.
! 122: In these cases, the name of the command is printed in parentheses.
! 123: .Pp
! 124: The
! 125: .Nm w
! 126: utility does not know about the new conventions for detection of background
! 127: jobs.
! 128: It will sometimes find a background job instead of the right one.
! 129: .Sh COMPATIBILITY
! 130: The
! 131: .Fl f ,
! 132: .Fl l ,
! 133: .Fl s ,
! 134: and
! 135: .Fl w
! 136: flags are no longer supported.
! 137: .Sh HISTORY
! 138: The
! 139: .Nm
! 140: command appeared in
! 141: .Ux 3.0 .
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