Fixing 49564 - dependency/BC problem?

[Ravikiran Rajagopal]

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Hello,
  KConfigBackEnd::sync() returns nothing, and hence fails silently when the 
user's local config file is not writable. As I understand it, we cannot have 
kdecore dependent on kdeui. So we cannot use a UI element to make the user 
aware of the situation.
  The only alternatives I can think of:

1. Add a sync() function which indicates success or failure - not possible to 
due to BC issues as sync() is virtual. Don't know whether changing a return 
type is BC though.

2. Emit a signal saying it failed, and let the app take care of it. Does not 
help existing binaries, and _all_ apps need to be ported.

3. Add a function canWeSaveConfig(). This has the same problem as #2.

4. If the user's local config file is not writable, try to make it writable. 
Very invasive, and I don't like it.

Should I mark this bug as WONTFIX due to BC issues? If we do make a change and 
#1 is ruled out, my inclination would be for #4. Why would someone outside of 
the kiosk mode make use of read-only config files?

Ravi
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