[Bug 575458] [NEW] /etc/dhcp3/dhclient-exit-hooks.d/ntp breaks local NTP server (patch)

[Dave Smith]

Public bug reported:

Binary package hint: ntp

The dhcp exit hook for ntp removes *all* ntp servers from ntp.conf if
the dhcp server provides a new ntp host. This is generally good, unless
your computer *is* an ntp server. In this case, your ntp server won't
work the next time your computer starts without DHCP.

The following patch fixes the problem by *not* replacing ntp servers
with an address beginning with "127.":

Patch for /etc/dhcp3/dhclient-exit-hooks.d/ntp:
@@ -40,7 +40,7 @@
 		echo "server $server iburst"
 	  done
 	  echo
-	  sed -r -e '/^ *(server|peer).*$/d' $NTP_CONF
+	  sed -r -e '/^ *(server  *[^1][^2][^7]\.|peer).*$/d' $NTP_CONF
 	) >>$tmp
 	
 	mv $tmp $NTP_DHCP_CONF


$ lsb_release -rd
Description:	Ubuntu 10.04 LTS
Release:	10.04

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: ntp (not installed)
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue May  4 17:06:40 2010
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: ntp

** Affects: ntp (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug lucid

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/etc/dhcp3/dhclient-exit-hooks.d/ntp breaks local NTP server (patch)
https://bugs.launchpad.net/bugs/575458
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