Re: [RFC][PATCH 4/5] Protect cinit from fatal signals

Bastian Blank
2008-11-27T01:04:27Z

On Tue, Nov 25, 2008 at 07:46:34PM -0800, Sukadev Bhattiprolu wrote:
> To protect container-init from fatal signals, set SIGNAL_UNKILLABLE but
> clear it if it receives SIGKILL from parent namespace - so it is still
> killable from ancestor namespace.

This sounds like a workaround.

> Note that container-init is still somewhat special compared to 'normal
> processes' - unhandled fatal signals like SIGUSR1 to a container-init
> are dropped even if they are from ancestor namespace. SIGKILL from an
> ancestor namespace is the only reliable way to kill a container-init.

It sounds not right to make this special case for a "normal" process.

However, no idea how to do this better.

Bastian

--
The heart is not a logical organ.
-- Dr. Janet Wallace, "The Deadly Years", stardate 3479.4