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Annotation of src/usr.bin/w/w.1, Revision 1.19

1.19    ! schwarze    1: .\"    $OpenBSD: w.1,v 1.18 2007/05/31 19:20:19 jmc Exp $
1.2       deraadt     2: .\"
1.1       deraadt     3: .\" Copyright (c) 1980, 1990, 1991, 1993
                      4: .\"    The Regents of the University of California.  All rights reserved.
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                      6: .\" Redistribution and use in source and binary forms, with or without
                      7: .\" modification, are permitted provided that the following conditions
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                      9: .\" 1. Redistributions of source code must retain the above copyright
                     10: .\"    notice, this list of conditions and the following disclaimer.
                     11: .\" 2. Redistributions in binary form must reproduce the above copyright
                     12: .\"    notice, this list of conditions and the following disclaimer in the
                     13: .\"    documentation and/or other materials provided with the distribution.
1.14      millert    14: .\" 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    15: .\"    may be used to endorse or promote products derived from this software
                     16: .\"    without specific prior written permission.
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                     18: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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                     20: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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                     23: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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                     29: .\"
                     30: .\"     @(#)w.1        8.1 (Berkeley) 6/6/93
                     31: .\"
1.19    ! schwarze   32: .Dd $Mdocdate: May 31 2007 $
1.1       deraadt    33: .Dt W 1
1.8       aaron      34: .Os
1.1       deraadt    35: .Sh NAME
                     36: .Nm w
1.6       deraadt    37: .Nd "display users who are logged on and what they are doing"
1.1       deraadt    38: .Sh SYNOPSIS
                     39: .Nm w
1.16      jmc        40: .Op Fl ahi
1.1       deraadt    41: .Op Fl M Ar core
                     42: .Op Fl N Ar system
                     43: .Op Ar user
                     44: .Sh DESCRIPTION
                     45: The
1.8       aaron      46: .Nm
1.1       deraadt    47: utility prints a summary of the current activity on the system,
                     48: including what each user is doing.
                     49: The first line displays the current time of day, how long the system has
                     50: been running, the number of users logged into the system, and the load
                     51: averages.
                     52: The load average numbers give the number of jobs in the run queue averaged
                     53: over 1, 5 and 15 minutes.
                     54: .Pp
                     55: The fields output are the user's login name, the name of the terminal the
                     56: user is on, the host from which the user is logged in, the time the user
                     57: logged on, the time since the user last typed anything,
                     58: and the name and arguments of the current process.
                     59: .Pp
                     60: The options are as follows:
1.11      aaron      61: .Bl -tag -width Ds
1.16      jmc        62: .It Fl a
                     63: Attempt to translate network addresses into names.
1.1       deraadt    64: .It Fl h
                     65: Suppress the heading.
                     66: .It Fl i
                     67: Output is sorted by idle time.
1.9       millert    68: .It Fl M Ar core
1.1       deraadt    69: Extract values associated with the name list from the specified
1.9       millert    70: .Ar core
1.13      miod       71: instead of the running kernel.
1.9       millert    72: .It Fl N Ar system
                     73: Extract the name list from the specified
                     74: .Ar system
1.13      miod       75: instead of the running kernel.
1.1       deraadt    76: .El
                     77: .Pp
                     78: If a
                     79: .Ar user
                     80: name is specified, the output is restricted to that user.
                     81: .Sh FILES
                     82: .Bl -tag -width /var/run/utmp -compact
                     83: .It Pa /var/run/utmp
                     84: list of users on the system
                     85: .El
                     86: .Sh SEE ALSO
                     87: .Xr finger 1 ,
                     88: .Xr ps 1 ,
                     89: .Xr uptime 1 ,
1.16      jmc        90: .Xr who 1 ,
                     91: .Xr utmp 5
1.15      jmc        92: .Sh STANDARDS
1.10      aaron      93: The
                     94: .Fl f ,
                     95: .Fl l ,
                     96: .Fl s ,
1.12      aaron      97: .Fl u ,
1.10      aaron      98: and
                     99: .Fl w
                    100: flags are no longer supported.
                    101: .Sh HISTORY
                    102: The
                    103: .Nm
                    104: command appeared in
1.19    ! schwarze  105: .Bx 2 .
1.1       deraadt   106: .Sh BUGS
                    107: The notion of the
                    108: .Dq current process
                    109: is muddy.
1.10      aaron     110: The current algorithm is
                    111: ``the highest numbered process on the terminal
1.1       deraadt   112: that is not ignoring interrupts, or, if there is none, the highest numbered
1.10      aaron     113: process on the terminal.''
1.1       deraadt   114: This fails, for example, in critical sections of programs like the shell
                    115: and editor, or when faulty programs running in the background fork and fail
                    116: to ignore interrupts.
                    117: (In cases where no process can be found,
1.8       aaron     118: .Nm
1.1       deraadt   119: prints
                    120: .Dq \- . )
                    121: .Pp
                    122: Background processes are not shown, even though they account for
                    123: much of the load on the system.
                    124: .Pp
                    125: Sometimes processes, typically those in the background, are printed with
                    126: null or garbaged arguments.
                    127: In these cases, the name of the command is printed in parentheses.
                    128: .Pp
1.8       aaron     129: The
                    130: .Nm
1.1       deraadt   131: utility does not know about the new conventions for detection of background
                    132: jobs.
                    133: It will sometimes find a background job instead of the right one.