[Bug 950409] Re: ifup fails but returns 0

[Stéphane Graber]

Marking as Won't fix at it's currently done by design.

ifupdown 0.7 when released will check for script return codes (in this
case the bridge-utils script) and will fail as you'd expect.

It's currently not the case because during the week or so where we had
that code turned on in Ubuntu we've seen quite a few packages completely
exploding as they were expecting ifupdown to disregard their return
code.

The actual change will most likely happen around 12.10 or when Debian
gets around to reviewing all the existing ifupdown scripts and making
sure they return sane return codes.

** Changed in: ifupdown (Ubuntu)
       Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/950409

Title:
  ifup fails but returns 0

Status in “ifupdown” package in Ubuntu:
  Won't Fix

Bug description:
  This is from the packaged xen script 'network-bridge'.

  do_ifup() {
      #if [ $1 != "${netdev}" ] || ! ifup $1 ; then
          if [ -n "$addr_pfx" ] ; then
              # use the info from get_ip_info()
              ip addr flush $1
              ip addr add ${addr_pfx} dev $1
          fi
          ip link set dev $1 up
          [ -n "$gateway" ] && ip route add default via ${gateway}
      #fi
  }

  I needed to comment out the encasing 'if' because ifup exits 0 even
  though it fails.  It throws a RETLINK error due to an ip existing on
  the interface, but $? = 0.  This causes the rest to fail and the
  bridge is not properly established.

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