Dunno if it helps, but: CHLD is an acronym for(sorry guys,
I'm not English, don't get me on this one) (analogue to) CLD.
I remember one of the two being POSIX and the other ...
Hmmm how do I say this... 'not' ? ... 'different' ?
Same behaviour when you declare it like this ?
$SIG{CLD} = \&REAPER;