[Bug 1639977] Re: /usr/bin/unattended-upgrade:FileNotFoundError:/usr/bin/unattended-upgrade at 1468:main:write_stamp_file

[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/1639977

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

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

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 rm -fr /var/lib/apt/periodic
  4) sudo /usr/bin/unattended-upgrade
  5) observe the following Traceback

  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 1468, in <module>
      main(options)
    File "/usr/bin/unattended-upgrade", line 1419, in main
      write_stamp_file()
    File "/usr/bin/unattended-upgrade", line 1011, in write_stamp_file
      with open(os.path.join(statedir, "unattended-upgrades-stamp"), "w"):
  FileNotFoundError: [Errno 2] No such file or directory: '/var/lib/apt/periodic/unattended-upgrades-stamp'

  With the version of the package from -proposed you'll receive no such
  Traceback.

  Regression Potential
  --------------------
  This patch just ends up creating a directory 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 statedir 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 package version 0.90ubuntu0.1, the problem page at https://errors.ubuntu.com/problem/4f4644d58ccc3231b270311abe8fec67b6c7ca36 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker you can request it at http://forms.canonical.com/reports/.

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