Re: wait(2) and SIGCHLD

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Sun, 16 Aug 2020 16:13:57 -0000 (UTC)
    From:        christos%astron.com@localhost (Christos Zoulas)
    Message-ID:  <rhbm04$57s$1%ciao.gmane.io@localhost>

  | They don't vanish, they get reparented to init(8) which then wakes up
  | and reaps them.

That probably would work, approximately, but isn't what's supposed to
happen when a child's parent is ignoring SIGCHLD - the child should
skip zombie state, and simply be cleaned up.

The difference would be detectable if init were sent a SIGSTOP
(assuming that isn't one which would cause a system panic)
so it would stop reaping children (temporarily) - processes of
the type in question should not be showing up as zombies.

kre