Is it possible to return value from ruby script and read that value inside c or shell script?

Question

How can we return value from ruby script?

#!/usr/bin/env ruby

a = "test"
a

How can we access the value of 'a' in Ubuntu terminal or java or c?

Answer 1

print your variable within ruby/python script, it can then be read from a shell script by example :

#!/bin/bash
ruby_var=$(ruby myrubyscript.rb)
python_var=$(python mypythonscript.py)

echo "$ruby_var"
echo "$python_var"

take care your ruby/python script only print this variable ( there are more complicated ways with named pipes by example for more interaction ).

Answer 2

If the value is an integer between 0 and 255, you can use the exit status

$ ruby -e 'var=42; exit var'
$ val=$?
$ echo $val
42