[wplug] bash variable help

[Henry Umansky]

I'm having a lot of trouble writing a bash script.  Here's what I want to 
do:

I have a file that contains multple variables

#file1
var1="value1"
var2="value2"
var3="value3"

Then I have another file that sources file1 and has a function that takes 
one argument.  The argument can be either a 1, 2, or 3.  That function, 
depending on the argument, will use var1, var2, var3, respectively.

#file 2
function() {
   which_var = "var${1}"
}

Now,  the variable $which_var either has a value of "var1", "var2", or 
"var3".  How would I use $which_var to extract the value of var1, var2, 
etc, so I get the value "value1", "value2", or "value3" instead of the 
value "var1", "var2", or "var3".  Unfortunately, I can't pass a var1, a 
var2, or a var3 to the function instead of 1, 2, 3, because the real script 
I'm writing will not know the variable name ahead of time.  Any help would 
be much appreciated.

-Henry