[Bug 1590321] Re: /usr/bin/unattended-upgrade:FileNotFoundError:/usr/bin/unattended-upgrade at 1468:main:get_dpkg_log_content

[Martin Pitt]

Hello errors.ubuntu.com, or anyone else affected,

Accepted unattended-upgrades into xenial-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/unattended-upgrades/0.90ubuntu0.2 in a few hours, and then in the
-proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: unattended-upgrades (Ubuntu Xenial)
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1590321

Title:
  /usr/bin/unattended-upgrade:FileNotFoundError:/usr/bin/unattended-
  upgrade at 1468:main:get_dpkg_log_content

Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in unattended-upgrades source package in Xenial:
  Fix Committed
Status in unattended-upgrades source package in Yakkety:
  Fix Committed
Status in unattended-upgrades source package in Zesty:
  Fix Released

Bug description:
  Test Case
  ---------
  1) edit /etc/apt/apt.conf.d/20auto-upgrades so that Update-Package-Lists is 1 and Unattended-Upgrade is 1
  2) sudo apt-get update
  3) sudo /usr/bin/unattended-upgrades (to update the system)
  4) sudo /usr/bin/unattended-upgrades (a second time for some reason)
  5) sudo rm /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
  6) sudo /usr/bin/unattended-upgrades

  Observe the following crash:

  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 1468, in <module>
      main(options)
    File "/usr/bin/unattended-upgrade", line 1406, in main
      log_content = get_dpkg_log_content(logfile_dpkg, install_start_time)
    File "/usr/bin/unattended-upgrade", line 1075, in get_dpkg_log_content
      with io.open(logfile_dpkg, encoding='utf-8') as fp:
  FileNotFoundError: [Errno 2] No such file or directory: '/var/log/unattended-upgrades/unattended-upgrades-dpkg.log'

  With the version of the package from -proposed you won't receive the
  crash in step 6 and /var/log/unattended-upgrades/unattended-upgrades-
  dpkg.log will exist.

  Regression Potential
  --------------------
  This patch just ends up creating a file if it does not exist. Potential regressions would be a result of the patch being typo'ed e.g. typo'ing os.path.exits instead of os.path.exists and the code failing when a logfile does exist. So read the patch carefully!

  
  Original Description
  --------------------
  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with version 0.90, the problem page at https://errors.ubuntu.com/problem/db5f0a803afdf5bb5e20a42ce68f4fda3ce0df8a contains more details.

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