[Bug 946754] Re: dnsmasq does not respect/watch '/etc/hosts' updates

[Paul Sladen]

Had a reply from Simon Kelly (upstream).  The worry is about race
conditions and reading /etc/hosts or resolv.conf after the 'mtime' has
been changed, but before the file has been completely written out
(dnsmasq already tries to backoff and schedule a re-read a couple of
seconds late if it finds an incomplete file).  The preferred solution is
for the process modifying the appropriate file to manually send:

  sudo killall -HUP dnsmasq

to the process.

Currently (on Ubuntu) dnsmasq is run as uid='nobody', so these needs
elevated privileges (which are needed anyway for editing those files).
This is okay for a human, but is less automatic than the previous
situation where /etc/hosts was being watched.

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Title:
  dnsmasq does not respect/watch '/etc/hosts' updates

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