apt's crontab.daily should check power source after the random wait

$ LANG=C apt-cache policy apt
apt:
  Installed: 0.7.25.3ubuntu9.3
  Candidate: 0.7.25.3ubuntu9.3
  Version table:
 *** 0.7.25.3ubuntu9.3 0
        500 http://archive.ubuntu.com/ubuntu/ lucid-updates/main Packages
        100 /var/lib/dpkg/status
     0.7.25.3ubuntu7 0
        500 http://archive.ubuntu.com/ubuntu/ lucid/main Packages

What? It does not appear to do any sleeping and your patch does not appear actually change anything.

This patch change a lot...

The actual behavior is

1 initialization
2 check power status
3 exit if powered by batteries
4 sleep up to 30 minutes
5 apply updates

The proposed behavior is

1 initialization
2 check power status
3 exit if powered by batteries
4 sleep up to 30 minutes
3' exit if powered by batteries
5 apply updates

If you unplug the power during the step 4, it is possible that the batteries are wasted at step 5. W/ this simple change the script double check power source after a potential long sleep

Ahh, I missed the second call to check_power. I see now.

Really, please send an unified diff.

$ dpkg-query -W apt
apt 0.8.3ubuntu7

A fix has been committed to the debian-sid branch of APT.

------------------------------------------------------------
revno: 2118
revision-id: <email address hidden>
parent: <email address hidden>
fixes bug(s): https://launchpad.net/bugs/705269
committer: Julian Andres Klode <email address hidden>
branch nick: debian-sid
timestamp: Thu 2011-04-21 09:53:37 +0200
message:
  debian/apt.cron.daily: Check power after wait, patch by manuel-soto (LP: #705269)

This bug was fixed in the package apt - 0.8.14.1ubuntu1

---------------
apt (0.8.14.1ubuntu1) oneiric; urgency=low

  [ Michael Vogt ]
  * merged from the debian-sid bzr branch

  [ Julian Andres Klode ]
  * apt-pkg/depcache.cc:
    - Really release action groups only once (Closes: #622744)
    - Make purge work again for config-files (LP: #244598) (Closes: #150831)
  * debian/apt.cron.daily:
    - Check power after wait, patch by manuel-soto (LP: #705269)
  * debian/control:
    - Move ${shlibs:Depends} to Pre-Depends, as we do not want APT
      unpacked if a library is too old and thus break upgrades
  * doc/apt-key.8.xml:
    - Document apt-key net-update (LP: #192810)

apt (0.8.14.1) unstable; urgency=low

  * apt-pkg/acquire-item.cc:
    - Only try to rename existing Release files (Closes: #622912)

apt (0.8.14) unstable; urgency=low

  [ Julian Andres Klode ]
  * apt-pkg/indexcopy.cc:
    - Use RealFileExists() instead of FileExists(), allows amongst other
      things a directory named Sources to exist on a CD-ROM (LP: #750694).
  * apt-pkg/acquire-item.cc:
    - Use Release files even if they cannot be verified (LP: #704595)
  * cmdline/apt-get.cc:
    - Do not install recommends for build-dep (Closes: #454479) (LP: #245273)
  * apt-pkg/deb/deblistparser.cc:
    - Handle no space before "[" in build-dependencies (LP: #72344)
  * apt-pkg/policy.cc:
    - Allow pinning by glob() expressions, and regular expressions
      surrounded by slashes (the "/" character) (LP: #399474)
      (Closes: #121132)
  * debian/control:
    - Set Standards-Version to 3.9.2

  [ Michael Vogt ]
  * mirror method:
    - do not crash if the mirror file fails to download
  * apt-pkg/aptconfiguration.cc:
    - fix comparing for a empty string
  * debian/apt.cron.daily:
    - run unattended-upgrades even if there was a error during
      the apt-get update (LP: #676295)

  [ David Kalnischkies ]
  * apt-pkg/pkgcache.cc:
    - use the native Architecture stored in the cache header instead of
      loading it from configuration as suggested by Julian Andres Klode
 -- Michael Vogt <email address hidden> Fri, 29 Apr 2011 17:55:20 +0200