[pkg-gnupg-maint] Bug#842015: [PINENTRY PATCH v2] gnome3: Test if Gcr System Prompter is available at startup.

[Daniel Kahn Gillmor]

Control: tags 842015 + patch

On Thu 2016-11-03 12:31:40 -0400, Daniel Kahn Gillmor wrote:
> +/* test whether we can create a system prompt or not.  This briefly
> +   does create a system prompt, which blocks other tools from making
> +   the same concurrent request, so we just create it to test if it is
> +   available, and quickly close it.
> +*/
> +int gcr_system_prompt_available ()

Just to be clear here -- this doesn't actually open any windows or
display anything.  It simply asks the gcr to reserve the right to make a
system prompt:

    https://developer.gnome.org/gcr/stable/GcrSystemPrompt.html#gcr-system-prompt-open

It should fail properly if:

 * there is nothing providing the gcr service on the current d-bus
   session, or

 * there is something which provides gcr, but it knows it is unable to
   make a system prompt.

let me know if you have any questions,

   --dkg
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