G'day jason0,

You provide very little in the way of details, which means that only a very generalised solution can be provided.

Here's some suggestions based on the assumption that you have code something like:

open my $cmd_pipe, '-|', 'iostat -w1';
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And that you're reading from $cmd_pipe line-by-line which, in turn, forms the basis for what you output to the screen (and without any knowledge of what the header line(s) look like).

• You could use Term::Size::Any (or similar) to get the current terminal size. Then, based on a count of the lines already output and the number of lines needed for the header, conditionally output a new header.
• Take a look at "perlipc: Signals" for information on signal handling.
• Some sort of GUI front-end (e.g. Tk) might be an alternative to consider.