[BusyBox] init does not kill reparented processes (MYSTERY SOLVED)

[Ignacio García Pérez]

> Sigh.  As you no doubt know, as a special case SIG_IGN for
> SIGCHLD means the signal isn't actually ignored, instead the
> kernel does automatic child reaping.  We used to do that, and
> then we received a fairly steady stream of bug reports about init
> deadlocking, so we reverted the SIGCHLD stuff.

Now that I realize, if then you set up a ignore handler for SIGCHLD, how the
heck do you wait for respawn process to terminate?. Shouldn't you instead
place a true handler that checks if the terminated child is a zombie o a
process controlled by init ?.

Regards.

Nacho.
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