w(1)                                                         w(1)



     NAME
          w - who is on and what they are doing

     SYNOPSIS
          w [-h] [-s] [user]

     DESCRIPTION
          w prints 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,
          the number of users logged into the system, and the load
          averages.  The load average numbers give the number of jobs
          in the run queue averaged over 1, 5 and 15 minutes.

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

          The -h flag option suppresses the heading.  The -s flag
          option asks for 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.  -l gives the
          long output, which is the default.

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

     FILES
          /usr/ucb/w
          /etc/utmp
          /dev/kmem
          /dev/drum

     SEE ALSO
          who(1), finger(1), ps(1) 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 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



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     w(1)                                                         w(1)



          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 new conventions for detection of
          background jobs.  It will sometimes find a background job
          instead of the right one.














































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