On Mon, 2014-02-03 at 18:05 +0200, Alberto Mardegan wrote: > I'm now facing the choice of how to implement all the above; my original > idea was to execute the plugin with aa-exec-click, but before jumping on > that solution I'd like to double check with a wider audience. I've been > told that the content hub uses upstart-app-launch instead, so I wonder > if I should use that instead (but that will only work if the plugins > install a .desktop file, will it)?
The feature that Content Hub is using I've called "untrusted helpers" and it has a lot more flexibility than applications do as we're expecting that the helper managers to do a lot of the lifecycle management (or setup a trusted session to do it). The original design was for the Infographic Visualization tools. What it provides for a developer is that you can use Upstart to do all the PID tracking and setting up the AppArmor profiles. For me, those are both scary bits of code, so I'd rather let Upstart handle them :-) You can see the API here: http://bazaar.launchpad.net/~ted/upstart-app-launch/untrusted-helper/view/head:/libupstart-app-launch/upstart-app-launch.h#L303 To use it besides using the API is install a small utility that reads what ever format your helper uses to represent what needs to be executed (desktop file, JSON, whatever). That goes in /usr/lib/*/upstart-app-launch/$(helper_type)/exec-tool and it should set the APP_EXEC Upstart variable. There's a trivial example here: http://bazaar.launchpad.net/~indicator-applet-developers/infographic-service/trunk.14.04/view/head:/utils/helper-exec-tool.sh Hope that helps, Ted
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