[Bug 828850] Re: software-properties-gtk crashed with DBusException in call_blocking(): com.ubuntu.SoftwareProperties.PermissionDeniedByPolicy: com.ubuntu.softwareproperties.applychanges

[Edward Donovan]

In jockey/ui.py , the exception is handled, in a 'try' block, like this:

  except PermissionDeniedByPolicy:
              self.error_msg(self.string_unprivileged)
              return False

Twice, at different points in the code:

http://bazaar.launchpad.net/~ubuntu-core-dev/jockey/ubuntu/view/head:/jockey/ui.py#L508
http://bazaar.launchpad.net/~ubuntu-core-dev/jockey/ubuntu/view/head:/jockey/ui.py#L677

self.string_unprivileged is earlier defined as 'You are not authorized
to perform this action.'

I don't yet see where the error_msg method is defined or inherited, just
places where it's called.  Jockey is built with GUI and text modes, so
it's a general mechanism.  software-properties is just GUI, and defines
error dialogs in a couple places, so I'm not yet sure what a patch
should look like.

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https://bugs.launchpad.net/bugs/828850

Title:
  software-properties-gtk crashed with DBusException in call_blocking():
  com.ubuntu.SoftwareProperties.PermissionDeniedByPolicy:
  com.ubuntu.softwareproperties.applychanges

Status in “software-properties” package in Ubuntu:
  Triaged

Bug description:
  This is reproducible by launching software-properties-gtk as any user
  that is not an admin, or from any session where the user can't be
  verified to be an admin via policykit - including when the user hits
  'cancel' in the authentication dialog. We should suppress these
  exceptions so they don't show up as crashes on the desktop.

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: software-properties-gtk 0.81.8
  ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
  Uname: Linux 3.0.0-8-generic x86_64
  Architecture: amd64
  Date: Thu Aug 11 14:27:10 2011
  ExecutablePath: /usr/bin/software-properties-gtk
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110705)
  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python /usr/bin/software-properties-gtk -n -t 132120584
  ProcCwd: /home/yehuda/Documents
  ProcEnviron:
   LANGUAGE=en_CA:en
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  PythonArgs: ['/usr/bin/software-properties-gtk', '-n', '-t', '132120584']
  SourcePackage: software-properties
  Title: software-properties-gtk crashed with DBusException in call_blocking(): com.ubuntu.SoftwareProperties.PermissionDeniedByPolicy: com.ubuntu.softwareproperties.applychanges
  UpgradeStatus: Upgraded to oneiric on 2011-07-27 (21 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

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