Shell Programming and Scripting

script below sets variable "var". Then sets "var2" (which contains "var" whithin it, see test.config file) from config file.


test.sh
----------------------------

Code:

#!/bin/sh
var="varvalue"
while read line
do
        var2=${line[0]}
done <./test.config
 
echo "var value is: $var"
echo "String from file: $var2"

----------------------------


test.config (the line contains a variable)

----------------------------

Code:

String is variable ${var}

----------------------------

but output doesn't recognise $var inside $var2 as a variable, even though it is set:
----------------------------

Code:

var value is: varvalue
String from file: String is variable ${var}

----------------------------


any solution to this? basically i need to read some lines from a file recognising the variables instead of taking them as simple strings.


any help really appreciated. thanks.

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Var2 would have to re-valuated, as in:
Which will result in:

Code:

var value is: varvalue
String from file: String is variable varvalue

Warning
Please be aware that anything in your inputfile is evaluated, including:

Code:

Remove all files: $(rm -rf /)
String is variable ${var}