[Bug 768171] Re: /sbin/dhclient3 remains after all dhcp3 packages purged

[Stéphane Graber]

Reverting status in Ubuntu as we're not using isc-dhcp 4.2 and so the
fix didn't make its way into Ubuntu.

However ifupdown was changed to do the right thing now and we'll be
dropping dhclient3 in 12.10 when merging ISC 4.2 from Debian.

** Changed in: isc-dhcp (Ubuntu)
       Status: Fix Committed => Triaged

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Title:
  /sbin/dhclient3 remains after all dhcp3 packages purged

Status in “ifupdown” package in Ubuntu:
  Invalid
Status in “isc-dhcp” package in Ubuntu:
  Triaged
Status in “isc-dhcp” package in Debian:
  Fix Released

Bug description:
  After upgrading from maverick to natty, I purged all dhcp3 packages
  since they were replaced with version 4 packages:

  % aptitude search '?source-package(isc-dhcp)'
  p   dhcp3-client                                               - ISC DHCP server (transitional package)                               
  p   dhcp3-common                                               - ISC DHCP common files (transitional package)                         
  p   dhcp3-dev                                                  - ISC DHCP development files (transitional package)                    
  p   dhcp3-relay                                                - ISC DHCP relay (transitional package)                                
  p   dhcp3-server                                               - ISC DHCP server (transitional package)                               
  i A isc-dhcp-client                                            - ISC DHCP client                                                      
  p   isc-dhcp-client-dbg                                        - ISC DHCP client (debugging symbols)                                  
  i A isc-dhcp-common                                            - common files used by all the isc-dhcp* packages                      
  p   isc-dhcp-dev                                               - API for accessing and modifying the DHCP server and client state     
  p   isc-dhcp-relay                                             - ISC DHCP relay daemon                                                
  p   isc-dhcp-relay-dbg                                         - DHCP relay daemon (debugging symbols)                                
  i   isc-dhcp-server                                            - ISC DHCP server for automatic IP address assignment                  
  p   isc-dhcp-server-dbg                                        - ISC DHCP server for automatic IP address assignment (debug)          
  p   isc-dhcp-server-ldap                                       - DHCP server able to use LDAP as backend

  However, /sbin/dhclient3 still remains, owned by the isc-dhcp-client
  package:

  % dpkg-query --search /sbin/dhclient3
  isc-dhcp-client: /sbin/dhclient3

  % file /sbin/dhclient3
  /sbin/dhclient3: symbolic link to `dhclient'

  I think it is wrong that isc-dhcp-client version four is providing a
  dhclient3 file.

  It is a problem because ifupdown first checks for dhclient3 and runs
  that, using a lease directory option of /var/lib/dhcp3. This is a
  problem if you remove dhcp3 directories.

  Also, the Debian isc-dhcp-client package does not contain the
  /sbin/dhclient3 symlink. This bug may be relevant:
  http://bugs.debian.org/588203

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: isc-dhcp-client 4.1.1-P1-15ubuntu9
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic i686
  Architecture: i386
  Date: Thu Apr 21 01:52:00 2011
  DhclientLeases:
   
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=862f0e74-6fe8-40a8-aef1-ed3aaaab5154 ro
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/sh
  ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  SourcePackage: isc-dhcp
  UpgradeStatus: Upgraded to natty on 2011-04-16 (5 days ago)

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