[Bug 782890] [NEW] no ping response on all hosts after upgrade

[Eric Metzler]

Public bug reported:

Binary package hint: backuppc

After upgrading from 3.1.0 to 3.2.0 as part of the Ubuntu server upgrade
from maverick to natty, none of my hosts were backing up, and all
(including localhost) were reporting "no ping response". I followed all
instructions prior to upgrading, and backuppc was at 3.1.0-9ubuntu2 and
working. I discovered the addition of the Ping6Path config variable,
which is set to "undef" by default. My config.pl file had the line

$Conf{Ping6Path} = undef;

after both an upgrade to 3.2.0-3ubuntu4 and a clean install after
purging the package. This, combined with the added code to Lib.pm caused
the $pingPath in $pingCmd to be empty, thus causing the "no ping
response" errors.

Changing the Ping6Path line in config.pl to

$Conf{Ping6Path} = '/bin/ping6';

solved the problem. This value should be populated by default for a
fresh install if /bin/ping6 is found, just as /bin/ping is populated in
$Conf{PingPath}.

# lsb_release -rd
Description:    Ubuntu 11.04
Release:        11.04
# apt-cache policy backuppc
backuppc:
  Installed: 3.2.0-3ubuntu4
  Candidate: 3.2.0-3ubuntu4
  Version table:
 *** 3.2.0-3ubuntu4 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty/main amd64 Packages
        100 /var/lib/dpkg/status

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

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https://bugs.launchpad.net/bugs/782890

Title:
  no ping response on all hosts after upgrade