perlipc says that Perl's handling of signals is based on the signal(3) function from the C library, so I imagine that man 3 signal—in particular, the 'default action' column—will give the information you want.

In reply to Re: Meaning of $SIG{...} = 'DEFAULT'; by JadeNB
in thread Meaning of $SIG{...} = 'DEFAULT'; by repellent

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