.\"	$NetBSD: utmpx.5,v 1.2 2003/04/16 13:35:24 wiz Exp $
.\"
.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Thomas Klausner.
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.Dd Dec 26, 2005
.Dt UTMPX 5
.Os
.Sh NAME
.Nm utmpx
.Nd user accounting database
.Sh SYNOPSIS
.In utmpx.h
.Sh DESCRIPTION
The
.Aq Pa utmpx.h
header defines the structures and functions for logging user.
Currently logged in users are tracked in
.Pa /var/run/utmpx .
The interface to the
.Nm utmpx
file is described in
.Xr endutxent 3 .
The file is not automatically created if they do not exist; it
must be created manually.
.Pp
Traditionally, separate files would be used to store the running log of
the logins and logouts
.Pf ( Pa wtmpx ) ,
and the last login of each user
.Pf ( Pa lastlogx ) .
With the availability of the Apple system log facility
.Xr asl 3 ,
these separate files can be replace with log entries, which are automatically
generated when
.Nm utmpx
entries are written.
The API to access the logins and logouts is described in
.Xr endutxent_wtmp 3
while the last login info is accessible with
.Xr getlastlogx 3 .
.Pp
For compatibility, changes to
.Nm utmpx
are reflected in
.Xr utmp 3
(in the
.Pa utmp ,
.Pa wtmp
and
.Pa lastlog
files),
but not the other way around.
.Sh FILES
.Bl -tag -width /var/log/utmpx -compact
.It Pa /var/run/utmpx
The
.Nm utmpx
file.
.El
.Sh SEE ALSO
.Xr asl 3 ,
.Xr endutxent 3 ,
.Xr endutxent_wtmp 3 ,
.Xr getlastlogx 3 ,
.Xr utmp 5