usr.bin/who/who.1

9b50d902SRodney W. Grimes.\" Copyright (c) 1986, 1991, 1993
9b50d902SRodney W. Grimes.\"	The Regents of the University of California.  All rights reserved.
9b50d902SRodney W. Grimes.\"
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9b50d902SRodney W. Grimes.\" modification, are permitted provided that the following conditions
9b50d902SRodney W. Grimes.\" are met:
9b50d902SRodney W. Grimes.\" 1. Redistributions of source code must retain the above copyright
9b50d902SRodney W. Grimes.\"    notice, this list of conditions and the following disclaimer.
9b50d902SRodney W. Grimes.\" 2. Redistributions in binary form must reproduce the above copyright
9b50d902SRodney W. Grimes.\"    notice, this list of conditions and the following disclaimer in the
9b50d902SRodney W. Grimes.\"    documentation and/or other materials provided with the distribution.
9b50d902SRodney W. Grimes.\" 3. All advertising materials mentioning features or use of this software
9b50d902SRodney W. Grimes.\"    must display the following acknowledgement:
9b50d902SRodney W. Grimes.\"	This product includes software developed by the University of
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9b50d902SRodney W. Grimes.\" 4. Neither the name of the University nor the names of its contributors
9b50d902SRodney W. Grimes.\"    may be used to endorse or promote products derived from this software
9b50d902SRodney W. Grimes.\"    without specific prior written permission.
9b50d902SRodney W. Grimes.\"
9b50d902SRodney W. Grimes.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
9b50d902SRodney W. Grimes.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
9b50d902SRodney W. Grimes.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
9b50d902SRodney W. Grimes.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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9b50d902SRodney W. Grimes.\" SUCH DAMAGE.
9b50d902SRodney W. Grimes.\"
9b50d902SRodney W. Grimes.\"     @(#)who.1	8.2 (Berkeley) 12/30/93
0abcff76SPhilippe Charnier.\"	$Id: who.1,v 1.4 1997/02/22 19:57:52 peter Exp $
9b50d902SRodney W. Grimes.\"
9b50d902SRodney W. Grimes.Dd December 30, 1993
9b50d902SRodney W. Grimes.Dt WHO 1
9b50d902SRodney W. Grimes.Os
9b50d902SRodney W. Grimes.Sh NAME
9b50d902SRodney W. Grimes.Nm who
9b50d902SRodney W. Grimes.Nd display who is logged in
9b50d902SRodney W. Grimes.Sh SYNOPSIS
9b50d902SRodney W. Grimes.Nm who
9b50d902SRodney W. Grimes.Op Ar am I
9b50d902SRodney W. Grimes.Op Ar file
9b50d902SRodney W. Grimes.Sh DESCRIPTION
0abcff76SPhilippe CharnierThe
0abcff76SPhilippe Charnier.Nm
0abcff76SPhilippe Charnierutility displays
9b50d902SRodney W. Grimesa list of all users currently logged on, showing for each user
9b50d902SRodney W. Grimesthe login name,
9b50d902SRodney W. Grimestty name, the date and time of login, and hostname if not local.
9b50d902SRodney W. Grimes.Pp
9b50d902SRodney W. GrimesAvailable options:
9b50d902SRodney W. Grimes.Pp
9b50d902SRodney W. Grimes.Bl -tag -width file
9b50d902SRodney W. Grimes.It Ar \&am I
9b50d902SRodney W. GrimesReturns the invoker's real user name.
9b50d902SRodney W. Grimes.It Ar file
9b50d902SRodney W. GrimesBy default,
0abcff76SPhilippe Charnier.Nm
9b50d902SRodney W. Grimesgathers information from the file
9b50d902SRodney W. Grimes.Pa /var/run/utmp .
9b50d902SRodney W. GrimesAn alternate
9b50d902SRodney W. Grimes.Ar file
9b50d902SRodney W. Grimesmay be specified which is usually
9b50d902SRodney W. Grimes.Pa /var/run/wtmp
9b50d902SRodney W. Grimes(or
9b50d902SRodney W. Grimes.Pa /var/run/wtmp.[0-6]
9b50d902SRodney W. Grimesdepending on site policy as
9b50d902SRodney W. Grimes.Pa wtmp
9b50d902SRodney W. Grimescan grow quite large and daily versions may or may not
9b50d902SRodney W. Grimesbe kept around after compression by
9b50d902SRodney W. Grimes.Xr ac 8 ) .
9b50d902SRodney W. GrimesThe
9b50d902SRodney W. Grimes.Pa wtmp
9b50d902SRodney W. Grimesfile contains a record of every login, logout,
9b50d902SRodney W. Grimescrash, shutdown and date change
9b50d902SRodney W. Grimessince
9b50d902SRodney W. Grimes.Pa wtmp
9b50d902SRodney W. Grimeswas last truncated or
9b50d902SRodney W. Grimescreated.
9b50d902SRodney W. Grimes.El
9b50d902SRodney W. Grimes.Pp
9b50d902SRodney W. GrimesIf
9b50d902SRodney W. Grimes.Pa /var/log/wtmp
9b50d902SRodney W. Grimesis being used as the file, the user name may be empty
9b50d902SRodney W. Grimesor one of the special characters '|', '}' and '~'.  Logouts produce
9b50d902SRodney W. Grimesan output line without any user name.  For more information on the
9b50d902SRodney W. Grimesspecial characters, see
9b50d902SRodney W. Grimes.Xr utmp 5 .
9b50d902SRodney W. Grimes.Sh FILES
9b50d902SRodney W. Grimes.Bl -tag -width /var/log/wtmp.[0-6] -compact
9b50d902SRodney W. Grimes.It Pa /var/run/utmp
9b50d902SRodney W. Grimes.It Pa /var/log/wtmp
9b50d902SRodney W. Grimes.It Pa /var/log/wtmp.[0-6]
9b50d902SRodney W. Grimes.El
9b50d902SRodney W. Grimes.Sh SEE ALSO
9b50d902SRodney W. Grimes.Xr last 1 ,
9b50d902SRodney W. Grimes.Xr users 1 ,
9b50d902SRodney W. Grimes.Xr getuid 2 ,
9b50d902SRodney W. Grimes.Xr utmp 5
9b50d902SRodney W. Grimes.Sh HISTORY
9b50d902SRodney W. GrimesA
9b50d902SRodney W. Grimes.Nm
9b50d902SRodney W. Grimescommand appeared in
b8923d4cSWolfram Schneider.At v1 .