[pacman-dev] Fwd: What is passed to a hook's Action?

I've looked at the docs for alpm-hooks. I even tried looking at the code but I'm not a C programmer so a lot didn't make sense to me. What I'm wondering is what gets passed to the command in Exec of a hook? And how is it passed? Are there variables we can put on the command line to be passed as parameters? Does everything come through stdin? Or nothing at all? Looking at andrewgregory's pachooks github repository, info-install.hook in particular, I get the impression things are passed via stdin. But I'm looking for some official docs or word from the developers to go on. Thanks, -- Headed for the second star to the right and straight on 'til morning... Eric Schultz