[Bug 503171] [NEW] User's umask is applied to newly added repo lists

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Binary package hint: synaptic

When adding a new repository from Synaptic in the following fashion...
    1. Open menu item "Settings > Repositories".
    2. Open tab "Other Software".
    3. Click the "Add" button, enter an APT line, then click button "Add Source".
...the user's umask is applied to the resultant sources.list file in /etc/apt/sources.list.d, when the permission of a sources.list file should be world-readable regardless of the user's umask.

If the user's umask is 077, then the resultant sources list is readable
only by root. This in turn causes UpdateManager to place an error icon
in gnome-panel's notification area. The error icon gives this message:

<quote>
Could not initialize the package information
An unresolvable problem occurred while initializing the package information.
Please report this bug against the 'update-manager' package and include the following error message:

'E:Opening /etc/apt/sources.list.d/mercurial-ppa-stable-snapshots-karmic.list - ifstream::ifstream (13: Permission denied), E:The list of sources could not be read.'
</quote>

Also, I believe this a copy of Bug #426191 and Bug #426192. I'm not
certain, though, because those bug reports are in German.

Steps to reproduce:
1. Place the following line in ~/.profile: umask 077
2. Log out, then log in again.
3. Follow the above steps to add a new repository (for example, ppa:mercurial-ppa/stable-snapshots).
4. Click the Reload button, as prompted by Synaptic.
5. Observe the error message produced by UpdateManager in the notification area.
6. Execute `ls -l /etc/apt/sources.list.d`, and observe that the offending *.list file has ownership/permissions:
    -rw------- root root

Thank you for your time!

ProblemType: Bug
Architecture: amd64
Date: Mon Jan  4 16:22:24 2010
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/sbin/synaptic
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
Package: synaptic 0.62.7ubuntu6
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-16.53-generic
SourcePackage: synaptic
Uname: Linux 2.6.31-16-generic x86_64

** Affects: software-properties (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug synaptic update-manager
-- 
User's umask is applied to newly added repo lists
https://bugs.launchpad.net/bugs/503171
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