141 lines
3.7 KiB
Groff
141 lines
3.7 KiB
Groff
.\" $NetBSD: who.1,v 1.16 2005/07/22 14:23:05 peter Exp $
|
|
.\"
|
|
.\" Copyright (c) 1986, 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)who.1 8.2 (Berkeley) 12/30/93
|
|
.\"
|
|
.Dd July 22, 2005
|
|
.Dt WHO 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm who
|
|
.Nd display who is logged in
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl HmqsTu
|
|
.Op Ar file
|
|
.Nm
|
|
.Ar am i
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility displays a list of all users currently logged on, showing for
|
|
each user the login name, tty name, the date and time of login, and
|
|
hostname if not local.
|
|
.Pp
|
|
Available options:
|
|
.Pp
|
|
.Bl -tag -width file
|
|
.It Fl H
|
|
Write column headings above the regular output.
|
|
.It Fl m
|
|
Only print information about the current terminal.
|
|
This is the
|
|
.Tn POSIX
|
|
way of saying
|
|
.Nm
|
|
.Ar am i .
|
|
.It Fl q
|
|
.Dq Quick mode :
|
|
List only the names and the number of users currently logged on.
|
|
When this option is used, all other options are ignored.
|
|
.It Fl s
|
|
List only the name, line and time fields.
|
|
This is the default.
|
|
.It Fl T
|
|
Print a character after the user name indicating the state of the
|
|
terminal line:
|
|
.Sq +
|
|
if the terminal is writable;
|
|
.Sq -
|
|
if it is not;
|
|
and
|
|
.Sq \&?
|
|
if a bad line is encountered.
|
|
.It Fl u
|
|
Print the idle time for each user.
|
|
.It Ar \&am I
|
|
Returns the invoker's real user name.
|
|
.It Ar file
|
|
By default,
|
|
.Nm
|
|
gathers information from the file
|
|
.Pa /var/run/utmp .
|
|
An alternative
|
|
.Ar file
|
|
may be specified which is usually
|
|
.Pa /var/log/wtmp
|
|
(or
|
|
.Pa /var/log/wtmp.[0-6]
|
|
depending on site policy as
|
|
.Pa wtmp
|
|
can grow quite large and daily versions may or may not
|
|
be kept around after compression by
|
|
.Xr ac 8 ) .
|
|
The
|
|
.Pa wtmp
|
|
file contains a record of every login, logout,
|
|
crash, shutdown and date change
|
|
since
|
|
.Pa wtmp
|
|
was last truncated or
|
|
created.
|
|
.El
|
|
.Pp
|
|
If
|
|
.Pa /var/log/wtmp
|
|
is being used as the file, the user name may be empty
|
|
or one of the special characters '|', '}' and '~'.
|
|
Logouts produce an output line without any user name.
|
|
For more information on the
|
|
special characters, see
|
|
.Xr utmp 5 .
|
|
.Sh FILES
|
|
.Bl -tag -width /var/log/wtmp.[0-6] -compact
|
|
.It Pa /var/run/utmp
|
|
.It Pa /var/log/wtmp
|
|
.It Pa /var/log/wtmp.[0-6]
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr last 1 ,
|
|
.Xr mesg 1 ,
|
|
.Xr users 1 ,
|
|
.Xr getuid 2 ,
|
|
.Xr utmp 5 ,
|
|
.Xr utmpx 5
|
|
.Sh STANDARDS
|
|
The
|
|
.Nm
|
|
utility is expected to conform to
|
|
.St -p1003.2-92 .
|
|
.Sh HISTORY
|
|
A
|
|
.Nm
|
|
utility appeared in
|
|
.At v6 .
|