Document signals dhclient currently pays attention to.

Much help from jmc@, positive feedback from sthen@

1 files changed, 35 insertions, 2 deletions

diff --git a/sbin/dhclient/dhclient.8 b/sbin/dhclient/dhclient.8
index 4436af840ac..2dd45b39e61 100644
--- a/sbin/dhclient/dhclient.8
+++ b/sbin/dhclient/dhclient.8
@@ -1,4 +1,4 @@
-.\" $OpenBSD: dhclient.8,v 1.16 2013/02/09 23:37:21 krw Exp $
+.\" $OpenBSD: dhclient.8,v 1.17 2013/02/22 14:14:45 krw Exp $
 .\"
 .\" Copyright (c) 1997 The Internet Software Consortium.
 .\" All rights reserved.
@@ -35,7 +35,7 @@
 .\" 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 9 2013 $
+.Dd $Mdocdate: February 22 2013 $
 .Dt DHCLIENT 8
 .Os
 .Sh NAME
@@ -192,6 +192,39 @@ file for each broadcast network interface.
 See
 .Xr bpf 4
 for more information.
+.Sh SIGNALS
+While running,
+.Nm
+reacts to a few different signals:
+.Bl -tag -width "USR[12]XXX"
+.It Dv HUP
+On receiving
+.Dv HUP
+.Nm
+will restart itself, reading
+.Xr dhclient.conf 5
+and obtaining a new lease.
+.It Dv USR[12]
+On receiving either
+.Dv USR1
+or
+.Dv USR2 ,
+.Nm
+will exit after attempting to remove any routes, interface addresses
+or temporary files it created.
+.It Dv TERM
+On receiving
+.Dv TERM
+.Nm
+will exit without attempting to remove any routes, interface addresses
+or temporary files it created.
+.It Dv QUIT
+On receiving
+.Dv QUIT
+.Nm
+will dump core and exit without attempting to remove any routes, interface
+addresses or temporary files it created.
+.El
 .Sh FILES
 .Bl -tag -width "/var/db/dhclient.leases.<IFNAME>XXX" -compact
 .It Pa /etc/dhclient.conf