how to do these 2 one-liners ?

Hi list,

in order to code a gvim plugin for git (I started something), I now miss 2 one-liners, and I hope experts around this list will find it easy to answer (for the sake of this plugin)

================================================
1) how do I check the status of a single file ? ( the file is already
added in the index)

I usually use git-status here, but for single files that need update, there should be a faster way.

================================================
2) how do I find in historical reverse order all the commits a
certain file belongs to since the origin ?

I usually do: git-log <file> | grep ^commit I would like to avoid piping here...

I may need more than these 2 one-liners, if they're doable. I'll post something soon :) Thanks in advance!