From: Jonathan McDowell <noodles@earth.li>
Date: Wed, 25 Apr 2012 04:15:38 +0000 (-0700)
Subject: Avoid race condition when receiving incoming mails
X-Git-Url: https://git.sommitrealweird.co.uk/onak.git/commitdiff_plain/fc7531131a7ccb7176f80ead865eee12b97a164c?hp=fc7531131a7ccb7176f80ead865eee12b97a164c

Avoid race condition when receiving incoming mails

  There's a race condition between us starting to accept a new incoming
  mail and taking the lock to start processing it; a second copy of
  onak-mail may come in and start to process the incomplete mail we're
  in the process of receiving. Receive to a tmp file and rename to .onak
  after we've received everything.

  Fixes Debian bug #650557. Thanks to Helmut Grohne <helmut@subdivi.de>
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