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1.\" $NetBSD: utmpx.5,v 1.7 2008/04/30 13:10:57 martin Exp $
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3.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
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6.\" This code is derived from software contributed to The NetBSD Foundation
7.\" by Thomas Klausner.
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30.Dd January 31, 2007
31.Dt UTMPX 5
32.Os
33.Sh NAME
34.Nm utmpx ,
35.Nm wtmpx ,
36.Nm lastlogx
37.Nd user accounting database
38.Sh SYNOPSIS
39.In utmpx.h
40.Sh DESCRIPTION
41In contrast to
42.Pa utmp
43and
44.Pa wtmp ,
45the extended databases in
46.Pa utmpx
47and
48.Pa wtmpx
49reserve more space for logging hostnames, and also
50information on a process' ID, termination signal and exit status.
51.Pp
52The
53.In utmpx.h
54header defines the structures and functions for logging user.
55Currently logged in users are tracked in
56.Pa /var/run/utmpx ,
57a list of all logins and logouts, as well as all shutdowns, reboots
58and date changes, is kept in
59.Pa /var/log/wtmpx ,
60and the last login of each user is noted in
61.Pa /var/log/lastlogx .
62.Pp
63The interface to the
64.Nm utmpx
65file is described in
66.Xr getutxent 3 .
67.Pp
68The
69.Nm wtmpx
70file can grow rapidly on busy systems, and is normally rotated with
71.Xr newsyslog 8 .
72.Pp
73In the event of a date change, a shutdown, or a reboot, the following
74items are logged in the
75.Nm wtmpx
76file:
77.Bl -tag -width shutdownxx -compact -offset indent
78.It Li date
79The system time has been manually or automatically updated by
80.Xr date 1 .
81The command name
82.Em date
83is recorded in the field
84.Fa ut_name .
85In the field
86.Fa ut_line ,
87the character
88.Ql \\*(Ba
89indicates the time prior to the change, and the character
90.Ql \&{
91indicates the new time.
92.It Li reboot
93.It Li shutdown
94A system reboot or shutdown has been initiated.
95The character
96.Ql \&~
97is placed in the field
98.Fa ut_line ,
99and
100.Li reboot
101or
102.Li shutdown
103in the field
104.Fa ut_name
105(see
106.Xr shutdown 8
107and
108.Xr reboot 8 ) ,
109using
110.Xr logwtmpx 3 .
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111.El
112.Sh FILES
113.Bl -tag -width /var/log/lastlogx -compact
114.It Pa /var/run/utmpx
115The
116.Nm utmpx
117file.
118.It Pa /var/log/wtmpx
119The
120.Nm wtmpx
121file.
122.It Pa /var/log/lastlogx
123The
124.Nm lastlogx
125file.
126.El
127.Sh SEE ALSO
128.Xr last 1 ,
129.Xr login 1 ,
130.Xr rwho 1 ,
131.Xr w 1 ,
132.Xr who 1 ,
133.Xr endutxent 3 ,
134.Xr logwtmpx 3 ,
135.Xr utmp 5 ,
136.Xr ac 8 ,
137.Xr init 8 ,
138.Xr newsyslog 8 ,
139.Xr reboot 8