#!/usr/bin/perl

$SIG{INT} = sub { print "Caught zap in $$\n"; exit };

if ( my $pid = fork() ) {
    print "Parent Start\n";
    sleep 5;
    local $SIG{INT} = sub { print "Parent $$ ignoring zap\n" };
    kill 2 => $pid, $$;
    sleep 10;
    print "Parent exit!\n";
}
else {
    print "Child start\n";
    sleep 10;
    print "Child exit!\n";
}