Ubuntu
unattended-upgrades package

SystemError: E:Unparsable control file

Bug #724994 reported by Fabien Tassin
58
This bug affects 7 people
Affects Status Importance Assigned to Milestone
unattended-upgrades (Ubuntu)
Fix Released
High
Unassigned
Natty
Fix Released
High
Unassigned

Bug Description

Binary package hint: unattended-upgrades

got that from cron this morning:

/etc/cron.daily/apt:
Traceback (most recent call last):
  File "/usr/bin/unattended-upgrade", line 538, in <module>
    main()
  File "/usr/bin/unattended-upgrade", line 394, in main
    if conffile_prompt(item.destfile):
  File "/usr/bin/unattended-upgrade", line 160, in conffile_prompt
    open(destFile), "conffiles")
SystemError: E:Unparsable control file

===

in debug mode:

check_conffile_prompt('/var/cache/apt/archives/brltty-x11_4.2-8ubuntu1_amd64.deb')
found pkg: brltty-x11
conffile line: /etc/brltty/brltty-xw-all.hlp 9f9e568c2818f63bfa3bc7759e5a2def
current md5: 9f9e568c2818f63bfa3bc7759e5a2def
<apt_pkg.AcquireItem object:Status: 2 Complete: 1 Local: 1 IsTrusted: 1 FileSize: 1347790 DestFile:'/var/cache/apt/archives/brltty_4.2-8ubuntu1_amd64.deb' DescURI: 'http://archive.ubuntu.com/ubuntu/pool/main/b/brltty/brltty_4.2-8ubuntu1_amd64.deb' ID:0 ErrorText: ''>
check_conffile_prompt('/var/cache/apt/archives/brltty_4.2-8ubuntu1_amd64.deb')
found pkg: brltty
conffile line: /etc/brltty/brltty-ba-all.hlp 798c2b496bd3c045a32450241f3dd6ce
Fetched 0 B in 0s (0 B/s)
Traceback (most recent call last):
  File "/usr/bin/unattended-upgrade", line 538, in <module>
    main()
  File "/usr/bin/unattended-upgrade", line 394, in main
    if conffile_prompt(item.destfile):
  File "/usr/bin/unattended-upgrade", line 160, in conffile_prompt
    open(destFile), "conffiles")
SystemError: E:Unparsable control file

yet that file is not empty:
-rw-r--r-- 1 root root 61 2010-06-17 08:50 /etc/brltty/brltty-ba-all.hlp

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unattended-upgrades 0.65ubuntu2
ProcVersionSignature: Ubuntu 2.6.37-6.17-generic 2.6.37-rc3
Uname: Linux 2.6.37-6-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Fri Feb 25 15:02:47 2011
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 LC_MESSAGES=en_US.utf8
 SHELL=/usr/bin/tcsh
SourcePackage: unattended-upgrades

Revision history for this message
Fabien Tassin (fta) wrote :
Revision history for this message
Michael Vogt (mvo) wrote :

Hm, this is confusing:

$ cat test.py
import apt_pkg
import apt_inst
import sys

debfile = sys.argv[1]
control = apt_inst.DebFile(debfile).control.extractdata("control")
sections = apt_pkg.TagSection(control)
print sections["Package"]
egon@top:/tmp$ python test.py brltty_4.2-8ubuntu1_amd64.deb
brltty

what is the output of
$ md5sum /var/cache/apt/archives/brltty_4.2-8ubuntu1_amd64.deb

Revision history for this message
Fabien Tassin (fta) wrote :

2214af036daec03e20b54b521dc33bbc /var/cache/apt/archives/brltty_4.2-8ubuntu1_amd64.deb

$ python test.py /var/cache/apt/archives/brltty_4.2-8ubuntu1_amd64.deb
brltty

Revision history for this message
Fabien Tassin (fta) wrote :
Download full text (26.6 KiB)

...but your test file is very different from the faulty code:

                    # get conffile value from pkg
                    pkg_conffiles = apt_inst.debExtractControl(
                        open(destFile), "conffiles")

with destFile = '/var/cache/apt/archives/brltty_4.2-8ubuntu1_amd64.deb'.

$ cat /tmp/test2.py
import apt_pkg
import apt_inst
import sys

destFile = sys.argv[1]
pkg_conffiles = apt_inst.debExtractControl(open(destFile), "conffiles")
print repr(pkg_conffiles)

$ python /tmp/test2.py /var/cache/apt/archives/brltty_4.2-8ubuntu1_amd64.deb
Traceback (most recent call last):
  File "/tmp/test2.py", line 6, in <module>
    pkg_conffiles = apt_inst.debExtractControl(open(destFile), "conffiles")
SystemError: E:Unparsable control file

$ apt-cache policy brltty
brltty:
  Installed: 4.2-4ubuntu2
  Candidate: 4.2-8ubuntu1
  Version table:
     4.2-8ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ natty/main amd64 Packages
 *** 4.2-4ubuntu2 0
        100 /var/lib/dpkg/status

$ apt-cache show brltty
Package: brltty
Priority: extra
Section: admin
Installed-Size: 6124
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: Debian Accessibility Team <email address hidden>
Architecture: amd64
Version: 4.2-8ubuntu1
Replaces: libbrlapi1 (<< 3.7.2-7.1)
Depends: libbrlapi0.5, libc6 (>= 2.4), libgpm2 (>= 1.20.4), libicu44 (>= 4.4.1-1), libncursesw5 (>= 5.6+20070908), initramfs-tools (>= 0.40ubuntu30), lsb-base (>= 3.2-14)
Suggests: brltty-speechd, brltty-x11, console-braille
Breaks: udev (<< 136-1)
Filename: pool/main/b/brltty/brltty_4.2-8ubuntu1_amd64.deb
Size: 1347790
MD5sum: 2214af036daec03e20b54b521dc33bbc
SHA1: 5ec31b986c11a166d28159469390c5adefb9b4a4
SHA256: 647c761033895c395bd82c944dc3de4b51e29bd46e318c682a95a5906c2989a9
Description: Access software for a blind person using a braille display
 BRLTTY is a daemon which provides access to the console (text mode)
 for a blind person using a braille display. It drives the braille
 display and provides complete screen review functionality.
 The following display models are supported:
  * Alva (ABT3xx, Delphi, Satellite, Braille System 40, BC 640/680)
  * Baum
  * BrailleLite (18, 40, M20/M40)
  * BrailleNote (18/32)
  * EcoBraille displays
  * EuroBraille displays
  * Freedom Scientific (Focus and PacMate)
  * HandyTech displays
  * HIMS (Braille Sense, SyncBraille)
  * LogText 32
  * MDV braille displays
  * Papenmeier
  * Pegasus (20/27/40/80)
  * Seika 40
  * Tieman (Voyager 44/70, CombiBraille, MiniBraille and MultiBraille)
  * Tivomatic (Albatross)
  * TSI (PowerBraille/Navigator)
  * Videobraille
  * VisioBraille
 .
 BRLTTY also provides a client/server based infrastructure for applications
 wishing to utilize a Braille display. The daemon process listens for incoming
 TCP/IP connections on a certain port. A shared object library for clients is
 provided in the package libbrlapi0.5. A static library, header files and
 documentation is provided in package libbrlapi-dev. Bindings to other
 programming languages can be found in libbrlapi-java (Java) and
 python-brlapi (Python).
Homepage: http://mielke.cc/brltty/
Bugs: htt...

Revision history for this message
Michael Vogt (mvo) wrote :

Thanks, indeed - I looked at line 120 in my trunk code which is different from the natty packages. I can reproduce the failure now.

Revision history for this message
Fabien Tassin (fta) wrote :

Good, moving to confirmed then.

Changed in unattended-upgrades (Ubuntu):
status: New → Confirmed
Michael Vogt (mvo)
Changed in unattended-upgrades (Ubuntu):
status: Confirmed → In Progress
importance: Undecided → High
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package unattended-upgrades - 0.71ubuntu1

---------------
unattended-upgrades (0.71ubuntu1) natty; urgency=low

  * debian/po/da.po:
    - added, thanks toJoe Dalton (closes: #619320)
  * unattended-upgrade, test/test_conffile.py:
    - use apt_inst.DebFile.control.extractdata() instead of
      apt_inst.debExtractControl() to not hit the limit of the
      tag section parser (LP: #724994)
    - add regression test
 -- Michael Vogt <email address hidden> Wed, 06 Apr 2011 11:44:48 +0200

Changed in unattended-upgrades (Ubuntu Natty):
status: In Progress → Fix Released
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