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+.\" Copyright 2006-2008 Roy Marples
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.Dd May 21, 2008
+.Dt DHCPCD.SH 8 SMM
+.Sh NAME
+.Nm dhcpcd-run-hooks
+.Nd DHCP client configuration script 
+.Sh DESCRIPTION
+.Nm
+is used by
+.Xr dhcpcd 8
+to run any system or user defined hook scripts.
+System hook scripts are found in
+.Pa @HOOKDIR@
+and the user defined hook is
+.Pa @SYSCONFDIR@/dhcpcd.hook .
+The default install supplies hook scripts for configuring
+.Pa /etc/resolv.conf
+and the hostname.
+Your distribution may have included other hook scripts to say configure
+ntp or ypbind.
+A test hook is also supplied that simply echos the dhcp variables to the
+console from DISCOVER message.
+.Pp
+Each time
+.Nm
+is invoked,
+.Ev $interface
+is set to the interface that
+.Nm dhcpcd
+is run on and
+.Ev $reason
+is to the reason why
+.Nm
+was invoked.
+DHCP information to be configured is held in variables starting with the word
+new_ and old DHCP information to be removed is held in variables starting with
+the word old_.
+.Nm dhcpcd
+can display the full list of variables it knows how about by using the
+.Fl V , -variables
+argument.
+.Pp
+Here's a list of reasons why
+.Nm
+could be invoked:
+.Bl -tag -width indent
+.It Dv BOUND
+dhcpcd obtained a new lease from a DHCP server.
+.It Dv RENEW
+dhcpcd renewed it's lease.
+.It Dv REBIND
+dhcpcd has rebound to a new DHCP server.
+.It Dv REBOOT
+dhcpcd successfully requested a lease from a DHCP server.
+.It Dv EXPIRE
+dhcpcd's lease expired and it failed to obtain a new one.
+.It Dv IPV4LL
+dhcpcd failed to contact any DHCP servers but did obtain an IPV4LL address.
+.It Dv FAIL
+dhcpcd failed to contact any DHCP servers or use an old lease.
+.It Dv TIMEOUT
+dhcpcd failed to contact any DHCP servers but was able to use an old lease.
+.It Dv TEST
+dhcpcd received an OFFER from a DHCP server but will not configure the
+interface.
+This is primarily used to test the variables are filled correctly for the
+script to process them.
+.El
+.Sh FILES 
+When
+.Nm
+runs, it loads
+.Pa @SYSCONFDIR@/dhcpcd.hook
+and any scripts found in
+.Pa @HOOKDIR@
+in a lexical order.
+.Sh SEE ALSO
+.Xr dhcpcd 8
+.Sh AUTHORS
+.An Roy Marples <roy@marples.name>
+.Sh BUGS
+Please report them to http://bugs.marples.name