add chdir and prepare ros.util:list
add chdir and prepare ros.util:list

roswell/roswell,snmsts/roswell,snmsts/roswell,snmsts/roswell,snmsts/roswell,guicho271828/roswell,roswell/roswell,guicho271828/roswell,guicho271828/roswell,roswell/roswell,guicho271828/roswell,roswell/roswell