From: Robert Klemme <bob.news@...>
Date: 2005-04-26T17:04:30+09:00
Subject: Re: escape special charactor


"sin kanti" <sinkanti@gmail.com> schrieb im Newsbeitrag
news:377080260504251254103e737b@mail.gmail.com...
> i use
>   $output = `command`
> because i want to puts $output later

Two options: use single quotes when building the command like:

cmd = "your_program -p '#{password}'"

escape the password:

cmd = "your_program -p #{password.gsub(/&/, '\\\\&')}"

I'd choose optin 1 because it's simpler and safer (note though that you
need similar escaping if the password contains single quotes).

Kind regards

    robert

>
> sinchai
>
> On 4/25/05, Joel VanderWerf <vjoel@path.berkeley.edu> wrote:
> > 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
> >
> >
>
>
>