w/w.1

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  28 .\"     @(#)w.1 8.1 (Berkeley) 6/6/93
  29 .\" $FreeBSD: src/usr.bin/w/w.1,v 1.20 2005/02/13 22:25:25 ru Exp $
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  31 .Dd June 6, 1993
  32 .Dt W 1
  33 .Os
  34 .Sh NAME
  35 .Nm w
  36 .Nd "display who is logged in and what they are doing"
  37 .Sh SYNOPSIS
  38 .Nm
  39 .Op Fl hin
  40 .Op Ar user ...
  41 .Sh DESCRIPTION
  42 The
  43 .Nm
  44 utility prints a summary of the current activity on the system,
  45 including what each user is doing.
  46 The first line displays the current time of day, how long the system has
  47 been running, the number of users logged into the system, and the load
  48 averages.
  49 The load average numbers give the number of jobs in the run queue averaged
  50 over 1, 5 and 15 minutes.
  51 .Pp
  52 The fields output are the user's login name, the name of the terminal the
  53 user is on, the host from which the user is logged in, the time the user
  54 logged on, the time since the user last typed anything,
  55 and the name and arguments of the current process.
  56 .Pp
  57 The options are as follows:
  58 .Bl -tag -width Ds
  59 .It Fl h
  60 Suppress the heading.
  61 .It Fl i
  62 Output is sorted by idle time.
  63 .El
  64 .Pp
  65 If one or more
  66 .Ar user
  67 names are specified, the output is restricted to those users.
  68 .Sh COMPATIBILITY
  69 The
  70 .Fl M ,
  71 .FL N ,
  72 .Fl d ,
  73 .Fl f ,
  74 .Fl l ,
  75 .Fl n ,
  76 .Fl s ,
  77 and
  78 .Fl w
  79 flags are no longer supported.
  80 .Sh SEE ALSO
  81 .Xr finger 1 ,
  82 .Xr ps 1 ,
  83 .Xr uptime 1 ,
  84 .Xr who 1
  85 .Sh HISTORY
  86 The
  87 .Nm
  88 command appeared in
  89 .Bx 3.0 .
  90 .Sh BUGS
  91 The notion of the
  92 .Dq current process
  93 is muddy.
  94 The current algorithm is ``the highest numbered process on the terminal
  95 that is not ignoring interrupts, or, if there is none, the highest numbered
  96 process on the terminal''.
  97 This fails, for example, in critical sections of programs like the shell
  98 and editor, or when faulty programs running in the background fork and fail
  99 to ignore interrupts.
 100 (In cases where no process can be found,
 101 .Nm
 102 prints
 103 .Dq \- . )
 104 .Pp
 105 The
 106 .Tn CPU
 107 time is only an estimate, in particular, if someone leaves a background
 108 process running after logging out, the person currently on that terminal is
 109 .Dq charged
 110 with the time.
 111 .Pp
 112 Background processes are not shown, even though they account for
 113 much of the load on the system.
 114 .Pp
 115 Sometimes processes, typically those in the background, are printed with
 116 null or garbaged arguments.
 117 In these cases, the name of the command is printed in parentheses.
 118 .Pp
 119 The
 120 .Nm
 121 utility does not know about the new conventions for detection of background
 122 jobs.
 123 It will sometimes find a background job instead of the right one.
 124 .Pp
 125 Long hostnames and IPv6 addresses may be truncated; however, the
 126 .Xr who 1
 127 utility will display full hostnames.