[Bug 492639] [NEW] newaliases fails on a system with no IPv4 address configured

[Teun]

Public bug reported:

Binary package hint: postfix

newaliases fails on a system with no IPv4 address configured, even when
it has full connectivity on IPv6.

as can be seen, this box has NO IPv4 address, but both loopback and eth0
have an IPv6 address configured:

[22:10|root at ipv6 ~]
# ip addr ls
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
   link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   inet6 ::1/128 scope host 
      valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
   link/ether 54:52:00:4c:e9:e7 brd ff:ff:ff:ff:ff:ff
   inet6 2001:7b8:3:47:5652:ff:fe4c:e9e7/64 scope global dynamic 
      valid_lft 2591969sec preferred_lft 604769sec
   inet6 fe80::5652:ff:fe4c:e9e7/64 scope link 
      valid_lft forever preferred_lft forever

Running newaliases fails:

[22:10|root at ipv6 ~]
# newaliases
newaliases: fatal: could not find any active network interfaces

Adding 127.0.0.1 to the loopback interface fixes it:

# ip addr add 127.0.0.1/8 dev lo
[22:13|root at ipv6 ~]
# newaliases
[22:14|root at ipv6 ~]
# 

(tadaa.wav, no error)

This was tested on Ubuntu 9.04, haven't checked a 9.10 install yet.

# lsb_release -rd
Description:    Ubuntu 9.04
Release:        9.04


PS: I totally understand that IPv6 only systems are still very uncommon and thus this bug will get a very low priority, but they won't be in a few years. I found this bug when testing systems with IPv6 only configured.

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


** Tags: ipv6

** Tags added: ipv6

-- 
newaliases fails on a system with no IPv4 address configured
https://bugs.launchpad.net/bugs/492639
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