[Bug 1008344] Re: checks "admin" group membership instead of querying polkit

[Martin Pitt]

> The problem is that polkit responds with "no, but you can
authenticate" (or something like it) also for standard users.

Hm, I get a different error message depending whether or not the user is
an admin:

for my user (which is an admin):
$ pkcheck --action-id com.ubuntu.languageselector.setsystemdefaultlanguage --process $$ 
polkit\56retains_authorization_after_challenge=1
Authorization requires authentication and -u wasn't passed.

For a test user which isn't admin:
$ pkcheck --action-id com.ubuntu.languageselector.setsystemdefaultlanguage --process $$ 
Not authorized.

(This implies not using interactivity). So it seems to me that polkit
can figure this out correctly?

That doesn't prevent us from allowing to authenticate as a different
user when using "interactive" mode of course, but it should be possible
to figure out whether the current user is an "admin".

> * Ask polkit

That's still my favourite solution.

> * Drop the is_admin check

Would be confusing UI wise, but still bearable if it isn't going to work
any other way.

> * gsettings

Please no. This is just wrong in so many ways.

Thanks!

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https://bugs.launchpad.net/bugs/1008344

Title:
  checks "admin" group membership instead of querying polkit

Status in “language-selector” package in Ubuntu:
  Triaged

Bug description:
  In a new install of Ubuntu Precise, I cannot make any system-wide
  changes in the language selector (such as installing languages or
  clicking "Apply System-Wide"), only user-specific changes. All those
  controls for system-wide changes are greyed out, although my user does
  have sudo abilities and I would be able to enter the root password of
  the machine.

  The machine is freshly installed, but with customizations specific to
  our site, e.g. ldap authentication for users. Specifically, my user is
  an ldap user, not a local one, and there is a group in the ldap
  directory which was granted sudo capability by adding it to
  /etc/sudoers. My user is part of that group. sudo on the command line
  and gksudo work fine.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: language-selector-gnome 0.79
  ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
  Uname: Linux 3.2.0-24-generic x86_64
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: amd64
  Date: Mon Jun  4 08:20:04 2012
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US:
   TERM=screen-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: language-selector
  UpgradeStatus: No upgrade log present (probably fresh install)

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