shoes and stdin

[niedh]

Hey,
   I want to write a little shoes program    ,and it will call the bash..
   eg:
   Shoes.app do |app|
      button('execute command as root') {  system("sudo 
/usr/local/bin/.....")}
   end
 when i click the button,   it will ask me the password in the 
console,  is there some way to avoid this,eg when it need read datas 
from stdin, pop up a 'ask window'


 thanks