Notes posted by wr0ngway

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November 19, 2013
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Return value not correct

It seems like trap returns nil if the handler was “DEFAULT”, but calling trap with nil causes a “IGNORE”

2.0.0-p247 :020 > p trap("CHLD", "DEFAULT")
 => nil 
2.0.0-p247 :021 > p trap("CHLD", nil)
 => nil 

So it seems that once you trap a signal, there isn’t a way to reset them back to what they were originally.