[chef-dev] STDIN

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Hello All. Can anybody clarify that is CHEF able to work with  STDIN. 
Recipe should  take inputs that will allow  to set various variables . 
I tried to do it with ruby_block but it says “error: No such file or
directory - -c”
Here is ruby block :

ruby_block "puts_some_text" do
block do
print("Enter your variable: ")
STDOUT.flush
a_string = gets
puts a_string
end
action :create
end