w(1)                    (BSD Compatibility Package)                    w(1)


   NAME
         w - who is logged in, and what are they doing

   SYNOPSIS
         /usr/ucb/w [ -hls ] [ user ]

   DESCRIPTION
         The w command displays a summary of the current activity on the
         system, including what each user is doing.  The heading line shows
         the current time of day, how long the system has been up, and the
         number of users logged into the system.

         The fields displayed are: the users login name, the name of the tty
         the user is on, the time of day the user logged on (in
         hours:minutes), the idle time-that is, the number of minutes since
         the user last typed anything (in hours:minutes), the CPU time used by
         all processes and their children on that terminal (in
         minutes:seconds), the CPU time used by the currently active processes
         (in minutes:seconds), the name and arguments of the current process.

         If a user name is included, output is restricted to that user.

         The following options are available:

         -h    Suppress the heading.

         -l    Produce a long form of output, which is the default.

         -s    Produce a short form of output.  In the short form, the tty is
               abbreviated, the login time and CPU times are left off, as are
               the arguments to commands.

   EXAMPLE
         w
         7:36am  up 6 days, 16:45,  1 users
         User  tty   login@      idle  JCPU  PCPU  what
         ralph console     7:10am         1  10:05 4:31  w

   FILES
         /var/adm/utmp
         /dev/kmem
         /dev/drum

   SEE ALSO
         ps(1), who(1) in the User's Reference Manual.
         utmp(4), whodo(1M) in the System Administrator's Reference Manual.

   NOTES
         The notion of the ``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


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   w(1)                    (BSD Compatibility Package)                    w(1)


         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, w prints -.

         The 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 ``charged'' with the time.

         Background processes are not shown, even though they account for much
         of the load on the system.

         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.

         w does not know about the conventions for detecting background jobs.
         It will sometimes find a background job instead of the right one.



































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