node.js -- execute command synchronously and get result

So I have a solution working, but don't exactly like it... Just posting here for reference:

I'm using the node-ffi library referenced in the other SO post. I have a function that:

• takes in a given command
• appends >> run-sync-output
• executes it
• reads run-sync-output synchronously and stores the result
• deletes this tmp file
• returns result

There's an obvious issue where if the user doesn't have write access to the current directory, it will fail. Plus, it's just wasted effort. :-/