sin kanti wrote:
> Hi all,
> 
> I write script to send password to unix shell.
> But i found out that if the password contain special charactor such as &,
> Shell will interpret it as background process.
> So, it have to use \& instead.
> 
> Is there any function can detect special char?
> and return it is escape form? ( like \& )
> 
> i found similar function in Regexp.escape, but it can't detect & 

Are you using #system? If so, you can prevent the shell from expanding 
things by passing each shell argument as a separate ruby argument:

irb(main):001:0> system "echo foo&"
foo
=> true
irb(main):002:0> system "echo", "foo&"
foo&
=> true