.\"	$OpenBSD: dhclient.leases.5,v 1.8 2013/02/24 12:18:43 krw Exp $
.\"
.\" Copyright (c) 1997 The Internet Software Consortium.
.\" 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 Internet Software Consortium 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 INTERNET SOFTWARE CONSORTIUM 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 INTERNET SOFTWARE CONSORTIUM 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.
.\"
.\" This software has been written for the Internet Software Consortium
.\" by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
.\" Enterprises.  To learn more about the Internet Software Consortium,
.\" see ``http://www.isc.org/isc''.  To learn more about Vixie
.\" Enterprises, see ``http://www.vix.com''.
.\"
.Dd $Mdocdate: February 24 2013 $
.Dt DHCLIENT.LEASES 5
.Os
.Sh NAME
.Nm dhclient.leases
.Nd DHCP client lease database
.Sh DESCRIPTION
.Xr dhclient 8
keeps a persistent database of leases that it has acquired that are still
valid.
The database is a free-form ASCII file containing one valid declaration
per lease.
The file is written as a log, so the last declaration is the most recent
lease obtained.
.Pp
The lease file is named
.Pa /var/db/dhclient.leases. Ns Aq Ar IFNAME ,
where
.Qq IFNAME
represents the network interface
.Xr dhclient 8
acquired the lease on.
For example, if
.Xr dhclient 8
is configured for the em0 network device,
the lease file will be named
.Pa /var/db/dhclient.leases.em0 ,
.Pp
The format of the lease declarations is described in
.Xr dhclient.conf 5 .
.Sh FILES
.Bl -tag -width "/var/db/dhclient.leases.IFNAME   "
.It Pa /var/db/dhclient.leases. Ns Aq Ar IFNAME ,
Current lease file.
.El
.Sh SEE ALSO
.Xr dhclient.conf 5 ,
.Xr dhcp-options 5 ,
.Xr dhcpd.conf 5 ,
.Xr dhclient 8 ,
.Xr dhcpd 8
.Sh STANDARDS
.Rs
.%A R. Droms
.%D March 1997
.%R RFC 2131
.%T Dynamic Host Configuration Protocol
.Re
.Pp
.Rs
.%A S. Alexander
.%A R. Droms
.%D March 1997
.%R RFC 2132
.%T DHCP Options and BOOTP Vendor Extensions
.Re
.Sh AUTHORS
.An -nosplit
.Xr dhclient 8
was written by
.An Ted Lemon Aq mellon@vix.com
under a contract with Vixie Labs.
.Pp
The current implementation was reworked by
.An Henning Brauer Aq henning@openbsd.org .