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Is there a way to send a control like symbol to a running
program, so if i run the following

<localhost>$ perl current_users.pl
#################################
Current users info
#################################

So the program has started, but i want to be able to pass
something like "display" by typing it in, and if it gets
that passed into the terminal it knows it has to print
something out.

But i would not want to use something like

my $INFO = <STDIN>; as that would make the program wait for
input, i want it to carry on processing, and then allow a user to pass input.

In reply to Reading terminal input while program is running by minixman

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