Is there a reason you need to use sigtrap? As the parent post mentions, perldoc perlipc states that perl will try to ignore the action if it is set to 'IGNORE', or use the default action if it is set to 'DEFAULT'.
Is this a bug in the perldoc? Or is there some other reason for this?

In reply to Re^2: SIGHUP handler "IGNORE" not defined. by cowboy
in thread SIGHUP handler "IGNORE" not defined. by scottb

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