Re: [ SEMANAGE ] Replace semanage debugging system

[Ivan Gyurdiev <ivg2@cornell.edu>]

> The auxiliary data could be directly embedded in the handle, avoiding
> any need to introduce a new structure (or allocation), with the get
> methods operating directly on the handle much like the old strerror
> interface.  I don't think you want msg_write needing to allocate any
> memory or performing any formatting string writing, as that should all
> be done in the callback if desired.
>   

Okay, so it sounds like the optimal setup is:
- pass variadic list to callback
- remove msg field from message structure (rename?)
- embed message structure into handle to avoid allocation

Then handler takes four arguments instead of the current two:

- void* arg
- message structure (rename?)
- fmt
- variadic list






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