--- http://awesome.naquadah.org/wiki/Autostart#Simple_way
-function run_once(prg,arg_string,pname,screen)
- if not prg then
- do return nil end
- end
-
- if not pname then
- pname = prg
- end
-
- if not arg_string then
- awful.util.spawn_with_shell("pgrep -f -u $USER -x '" .. pname .. "' || (" .. prg .. ")",screen)
- else
- awful.util.spawn_with_shell("pgrep -f -u $USER -x '" .. pname .. " ".. arg_string .."' || (" .. prg .. " " .. arg_string .. ")",screen)
- end
-end