w/w.1

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  34 .\"     @(#)w.1 8.1 (Berkeley) 6/6/93
  35 .\"
  36 .Dd June 6, 1993
  37 .Dt W 1
  38 .Os BSD 4
  39 .Sh NAME
  40 .Nm w
  41 .Nd "who present users are and what they are doing"
  42 .Sh SYNOPSIS
  43 .Nm
  44 .Op Fl hin
  45 .Op Fl M Ar core
  46 .Op Fl N Ar system
  47 .Op Ar user
  48 .Sh DESCRIPTION
  49 The
  50 .Nm
  51 utility prints a summary of the current activity on the system,
  52 including what each user is doing.
  53 The first line displays the current time of day, how long the system has
  54 been running, the number of users logged into the system, and the load
  55 averages.
  56 The load average numbers give the number of jobs in the run queue averaged
  57 over 1, 5 and 15 minutes.
  58 .Pp
  59 The fields output are the user's login name, the name of the terminal the
  60 user is on, the host from which the user is logged in, the time the user
  61 logged on, the time since the user last typed anything,
  62 and the name and arguments of the current process.
  63 .Pp
  64 The options are as follows:
  65 .Bl -tag -width Ds
  66 .It Fl h
  67 Suppress the heading.
  68 .It Fl i
  69 Output is sorted by idle time.
  70 .It Fl M
  71 Extract values associated with the name list from the specified
  72 core instead of the default
  73 .Dq /dev/kmem .
  74 .It Fl N
  75 Extract the name list from the specified system instead of the
  76 default
  77 .Dq /mach .
  78 .It Fl n
  79 Show network addresses as numbers (normally
  80 .Nm
  81 interprets addresses and attempts to display them symbolically).
  82 .El
  83 .Pp
  84 If a
  85 .Ar user
  86 name is specified, the output is restricted to that user.
  87 .Sh FILES
  88 .Bl -tag -width /var/run/utmp -compact
  89 .It Pa /var/run/utmp
  90 list of users on the system
  91 .El
  92 .Sh SEE ALSO
  93 .Xr who 1 ,
  94 .Xr finger 1 ,
  95 .Xr ps 1 ,
  96 .Xr uptime 1
  97 .Sh BUGS
  98 The notion of the
  99 .Dq current process
 100 is muddy.
 101 The current algorithm is ``the highest numbered process on the terminal
 102 that is not ignoring interrupts, or, if there is none, the highest numbered
 103 process on the terminal''.
 104 This fails, for example, in critical sections of programs like the shell
 105 and editor, or when faulty programs running in the background fork and fail
 106 to ignore interrupts.
 107 (In cases where no process can be found,
 108 .Nm
 109 prints
 110 .Dq \- . )
 111 .Pp
 112 The
 113 .Tn CPU
 114 time is only an estimate, in particular, if someone leaves a background
 115 process running after logging out, the person currently on that terminal is
 116 .Dq charged
 117 with the time.
 118 .Pp
 119 Background processes are not shown, even though they account for
 120 much of the load on the system.
 121 .Pp
 122 Sometimes processes, typically those in the background, are printed with
 123 null or garbaged arguments.
 124 In these cases, the name of the command is printed in parentheses.
 125 .Pp
 126 The
 127 .Nm
 128 utility does not know about the new conventions for detection of background
 129 jobs.
 130 It will sometimes find a background job instead of the right one.
 131 .Sh COMPATIBILITY
 132 The
 133 .Fl f ,
 134 .Fl l ,
 135 .Fl s ,
 136 and
 137 .Fl w
 138 flags are no longer supported.
 139 .Sh HISTORY
 140 The
 141 .Nm
 142 command appeared in
 143 .Ux 3.0 .