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who(1)				 User Commands				who(1)

       who - who is on the system

       /usr/bin/who [-abdHlmpqrstTu] [file]

       /usr/bin/who -q [-n x] [file]

       /usr/bin/who am i

       /usr/bin/who am I

       /usr/xpg4/bin/who [-abdHlmpqrtTu] [file]

       /usr/xpg4/bin/who -q [-n	x] [file]

       /usr/xpg4/bin/who -s [-bdHlmpqrtu] [file]

       /usr/xpg4/bin/who am i

       /usr/xpg4/bin/who am I

       The  who	 utility  can list the user's name, terminal line, login time,
       elapsed time since activity occurred on the line, and the process-ID of
       the  command  interpreter (shell) for each current UNIX system user. It
       examines	the /var/adm/utmpx file	to obtain its information. If file  is
       given,  that  file (which must be in utmpx(4) format) is	examined. Usu-
       ally, file will be /var/adm/wtmpx, which	contains a history of all  the
       logins since the	file was last created.

       The general format for output is:

	      name [state] line	time [idle] [pid] [comment] [exit]


	name User's login name

       state Capability	of writing to the terminal

       line  Name of the line found in /dev

       time  Time since	user's login

       idle  Time elapsed since	the user's last	activity

       pid   User's process id

	     Comment line in inittab(4)

       exit  Exit status for dead processes

       The following options are supported:

       - a   Processes	/var/adm/utmpx	or the named file with -b, -d, -l, -p,
	     -r, -t, -T, and -u	options	turned on.

       -b    Indicates the time	and date of the	last reboot.

       -d    Displays all processes that have expired and not  been  respawned
	     by	 init.	The exit field appears for dead	processes and contains
	     the termination and exit values (as returned by  wait(3UCB)),  of
	     the  dead	process.   This	 can  be  useful  in determining why a
	     process terminated.

       -H    Outputs column headings above the regular output.

       -l    Lists only	those lines on which the system	is waiting for someone
	     to	login. The name	field is LOGIN in such cases. Other fields are
	     the same as for user entries except that the state	field does not

       -m    Outputs only information about the	current	terminal.

       -n x  Takes  a numeric argument,	x, which specifies the number of users
	     to	display	per line. x must be at least 1.	The -n option can only
	     be	used with -q.

       -p    Lists  any	 other	process	 that is currently active and has been
	     previously	spawned	by init. The name field	is  the	 name  of  the
	     program  executed	by  init as found in /sbin/inittab. The	state,
	     line, and idle fields have	no meaning. The	 comment  field	 shows
	     the  id  field  of	 the line from /sbin/inittab that spawned this
	     process. See inittab(4).

       -q    (Quick who) Displays only the names and the number	of users  cur-
	     rently logged on. When this option	is used, all other options are

       -r    Indicates the current run-level of	the init process.

       -s    (Default) Lists only the name, line, and time fields.

       - T   Same as the -s option, except that	the state idle,	pid, and  com-
	     ment,  fields  are	 also  written.	 state is one of the following

	     +	   The terminal	allows write access to other users.

	     -	   The terminal	denies write access to other users.

	     ?	   The terminal	write-access state cannot be determined.

       - T   Same as the -s option, except that	the state field	is also	 writ-
	     ten. state	is one of the characters listed	under the /usr/bin/who
	     version of	this option. If	the -u option is  used	with  -T,  the
	     idle time is added	to the end of the previous format.

       -t    Indicates	the  last  change  to the system clock (using the date
	     utility) by root. See su(1M) and date(1).

       -u    Lists only	those users who	are currently logged in. The  name  is
	     the  user's login name. The line is the name of the line as found
	     in	the directory /dev. The	time is	the time that the user	logged
	     in.  The  idle  column  contains  the number of hours and minutes
	     since activity last occurred on that particular line. A  dot  (.)
	     indicates	that the terminal has seen activity in the last	minute
	     and is therefore ``current.'' If more than	twenty-four hours have
	     elapsed  or the line has not been used since boot time, the entry
	     is	marked old. This field is  useful  when	 trying	 to  determine
	     whether  a	 person	 is working at the terminal or not. The	pid is
	     the process-ID of the user's shell. The comment  is  the  comment
	     field  associated	with  this line	as found in /sbin/inittab (see
	     inittab(4)).  This	can contain information	about where the	termi-
	     nal is located, the telephone number of the dataset, type of ter-
	     minal if hard-wired, and so forth.

       The following operands are supported:

	am i

       am  I In	the "C"	locale,	limits the output to describing	 the  invoking
	     user,  equivalent	to  the	 -m option.  The am and	i or I must be
	     separate arguments.

       file  Specifies a path name of a	file to	substitute for the database of
	     logged-on users that who uses by default.

       See  environ(5) for descriptions	of the following environment variables
       that affect the execution of who: LC_CTYPE, LC_MESSAGES,	 LC_TIME,  and

       The following exit values are returned:

	0    Successful	completion.

       >0    An	error occurred.

	     Script for	init

	     Current user and accounting information

	     Historic user and accounting information

       See attributes(5) for descriptions of the following attributes:

       |      ATTRIBUTE	TYPE	     |	    ATTRIBUTE VALUE	   |
       |Availability		     |SUNWcsu			   |

       |      ATTRIBUTE	TYPE	     |	    ATTRIBUTE VALUE	   |
       |Availability		     |SUNWxcu4			   |

       date(1),	 login(1),  mesg(1), init(1M), su(1M), wait(3UCB), inittab(4),
       utmpx(4), attributes(5),	environ(5), XPG4(5)

       Super user: After a shutdown to the single-user state,  who  returns  a
       prompt;	since  /var/adm/utmpx is updated at login time and there is no
       login in	single-user state, who cannot report accurately	on this	state.
       who am i, however, returns the correct information.

SunOS 5.9			  3 Nov	2000				who(1)


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