W(1) BSD Reference Manual W(1)NAMEw - display users who are logged on and what they are doing
SYNOPSISw [-ahi] [-M core] [-N system] [user]
DESCRIPTION
The w utility prints a summary of the current activity on the system, in-
cluding what each user is doing. The first line displays the current time
of day, how long the system has been running, 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 user's login name, the name of the terminal the
user is on, the host from which the user is logged in, the time the user
logged on, the time since the user last typed anything, and the name and
arguments of the current process.
The options are as follows:
-a Attempt to translate network addresses into names.
-h Suppress the heading.
-i Output is sorted by idle time.
-M core
Extract values associated with the name list from the specified
core instead of the running kernel.
-N system
Extract the name list from the specified system instead of the
running kernel.
If a user name is specified, the output is restricted to that user.
FILES
/var/run/utmp list of users on the system
SEE ALSOfinger(1), ps(1), uptime(1), who(1), utmp(5)STANDARDS
The -f, -l, -s, -u, and -w flags are no longer supported.
HISTORY
The w command appeared in 3.0BSD.
BUGS
The notion of the "current process" is muddy. The current algorithm is
``the highest numbered process on the terminal that is not ignoring in-
terrupts, or, if there is none, the highest numbered process on the ter-
minal.'' 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 "-".)
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.
The w utility does not know about the new conventions for detection of
background jobs. It will sometimes find a background job instead of the
right one.
MirOS BSD #10-current June 6, 1993 1
