3 ms·

I can point out one thing: http://rachelbythebay.com/w/2014/08/19/fork/ http://rachelbythebay.com/w/2014/08/19/fork/

• jfo 9y ago
  Omg
• tyingq 9y ago
  Not mentioned there, but aside from kill() doing something special with -1, waitpid() also does something special with -1. The referenced article code could/would pass -1 to waitpid().