Public bug reported:
Binary package hint: dnsmasq
When dnsmasq is used with the --interface argument, and the selected
interface is not yet available dnsmasq exits immediately. This prevents
some use cases, including:
1) managed virtual environments bringing up virbr0 interfaces (libvirt
has commented code disabling this to avoid this premature exit)
2) Use with usb0 networks for hotplug of portable devices for ad-hoc
network access
3) Use with usb networking adaptors to provide occasional ad-hoc
networks on demand
This is more important when one is using the DHCP or TFTP features
of dnsmasq, as in those cases one may wish to specifcally bind ony to
some known interface considered safe for these services (virbr0 and usb0
being networks that are rarely used to reach gateways by systems that
would run dnsmasq as a system service).
** Affects: dnsmasq (Ubuntu)
Importance: Undecided
Status: New
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dnsmasq exits using --interface if the interface does not exist yet
https://bugs.launchpad.net/bugs/526386
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