Re: [Help-bash] eval backgrounds with & in variable string

[Jesse Molina]

Ahha.  Thanks for making me realize how bone-headed that was.

Ultimately my problem was that I had a common variable with a URL in it, 
which I need to call many times with minor substitution of an ID inside 
of it.

eval does what it does.  I need to escape those characters.



On 3/14/14, 12:46, Greg Wooledge wrote:
> On Fri, Mar 14, 2014 at 12:29:28PM -0700, Jesse Molina wrote:
> > address@hidden>eval echo 'one&uno&ichi'
> > [3] 14201
> > [4] 14202
> > one
> > -bash: uno: command not found
> > -bash: ichi: command not found
> > Okay, that's definitely not what I wanted.  Eval seems to have evaluated
> > my "&" characters into being a split and then tries to background those
> > commands.
> Yes.  As expected.  Your command is identical to:
>
>    echo one&uno&ichi
>
> > Can I "set" something to make this work, or am I going to have to escape
> > these on input?
> To make what work?  What's the goal?  If you just want to echo that
> string, remove the eval and keep the quotes.
>
> > While on the subject of eval, does anyone else have fun examples, known
> > pitfalls, and other interesting things?
> http://mywiki.wooledge.org/BashFAQ/048 has some discussion, but is
> somewhat light on examples.