.\"	$OpenBSD: dhclient.leases.5,v 1.9 2013/07/16 09:45:28 schwarze Exp $
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.\" This software has been written for the Internet Software Consortium
.\" by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
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.Dd $Mdocdate: July 16 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 Mt mellon@vix.com
under a contract with Vixie Labs.
.Pp
The current implementation was reworked by
.An Henning Brauer Aq Mt henning@openbsd.org .