Config snippet for Awesome WM to spawn terminal in current directory

spawn-terminal-same-directory.lua

--[[
    This snippet works with rxvt-unicode. If you hit Mod+Return while
    you have a terminal window focused, the new terminal window will
    begin in the same directory instead of the default (your home directory).
--]]
      awful.key({ modkey,           }, "Return", function ()
    		local extra_args = "";
    		local curr_client = client.focus;
    		if curr_client and curr_client.class == "URxvt" then
    			local shell_pid = io.popen("ps h --ppid "..curr_client.pid.." -o pid"):read("*l"):gsub("%s+", "");
    			extra_args = " -cd /proc/"..shell_pid.."/cwd";
    		end
    		awful.util.spawn(terminal..extra_args)
    	end, { description = "open a terminal" });