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

[Brian Murray]

Verily verified for Yakkety.

Preparing to unpack .../unattended-upgrades_0.92ubuntu1.1_all.deb ...
Unpacking unattended-upgrades (0.92ubuntu1.1) over (0.92ubuntu1) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for systemd (231-9git1) ...
Setting up unattended-upgrades (0.92ubuntu1.1) ...
Replacing config file /etc/apt/apt.conf.d/50unattended-upgrades with new version
update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
Processing triggers for man-db (2.7.5-1) ...
bdmurray at clean-yakkety-amd64:~$ ls /var/lib/apt/periodic/unattended-upgrades-stamp
ls: cannot access '/var/lib/apt/periodic/unattended-upgrades-stamp': No such file or directory
bdmurray at clean-yakkety-amd64:~$ sudo /usr/bin/unattended-upgrade
bdmurray at clean-yakkety-amd64:~$ ls /var/lib/apt/periodic/unattended-upgrades-stamp
/var/lib/apt/periodic/unattended-upgrades-stamp


** Tags removed: verification-needed
** Tags added: verification-done-yakkety

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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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